We strive every day to find the best products that satisfy your needs as quickly as possible. This work presents a feasibility study for an enzymatic reaction in a continuously operated reactive distillation column and describes the reaction kinetics by means of the MichaelisMenten double-substrate kinetic model in combination with the Arrhenius model. the program and database. uses its best efforts to deliver a high quality copy of the Your email address will not be published. A 178:L1-L6, Occelli M.L., Biz S., Auroux A., Ray G.J. Genetic diversity of volatile components in Xinjiang Wild Apple (Malus sieversii). J. Sep. Sci. The properties covered by both versions (32 total) are described in Properties and Implemented Models. Food Chem. [, Watson AD: Thematic review series: systems biology approaches to metabolic and cardiovascular disorders. Specializing in ready to use metabolomics kits. A mathematical model is developed to assess the effect of cascading sets of enzyme reactors and physical separators, when compared with the classical unit operation approach, in terms of total time required to effect reaction and separation for a given overall conversion. (2001) J. Catal. (1997) Micropor. The latter two result in the net production of ATP, and it is believed that this is the preferred mechanism as a result[1]. Standard Reference Data Act. Butanoic acid, pentyl ester - NIST Immobilized Thermomyces lanuginosus lipase (TLL) prepared via physical adsorption on mesoporous poly-methacrylate particles (PMA) was used as biocatalyst. 0.2 g of dried immobilized lipase were added to the substrate solution containing 5 mL of a polar organic solvent (tert-amyl alcohol) containing 352 mM of ascorbic acid and 352 mM of olive oil. Ethyl butyrate is a colourless transparent liquid, similar pineapple fragrance, and 120.6 of boiling points, fusing point-93.3 is soluble in organic solvents such as ethanol and ether, and is water-soluble hardly.It has an extensive use in that essence, food, medicine and chemistry etc. J Lipid Res. (1981) 1671. Presence all over the country, staff dedicated to sourcing raw materials and considerable storage capacity guarantee that goods are rapidly obtained and supplied. Yannai, Shmuel. (1983) J. Org. Pentyl butanoate is used in food flavouring Pentyl butyrate, also known as pentyl butanoate or amyl butyrate, is an ester that is formed when pentanol is reacted with butyric acid, usually in the presence of sulfuric acid as a catalyst. Pentyl butyrate, also known as pentyl butanoate or amyl butyrate, is an ester that is formed when pentanol is reacted with butyric acid, [1] usually in the presence of sulfuric acid as a catalyst. Because of its intense, pleasant odor and its low toxicity, isoamyl acetate is used to test the effectiveness of respirators or gas masks. such sites. Download Citation | Study on the synthesis of amyl butyrate catalyzed by solid superacid | Solid superacid SO42-/TiO2 has been prepared by a sol-gel method with titanium tetrabutoxide as precursor. CONSULTANCY 13:795-805. As an industry leader, Penta continues to pioneer chemistry-based solutions for practically every area of commerce. 2021 by the U.S. Secretary of Commerce Your web browser must have JavaScript enabled There are two known enzymes that catalyze the conversion of butyryl-CoA to butyrate:butyryl-CoA/acetyl-CoA transferase and phoshpotranbutrylase and butyrate kinase. Over the years this has allowed the company to develop strong relationships with many global manufacturers; several of whom we represent in the UK. The National Institute of Standards and Technology is an agency of the U.S. Department of Commerce. Methyl butyrate, also known under the systematic name methyl butanoate, is the methyl ester of butyric acid. Flexibility, availability, price and quality make LLUCH ESSENCE S.L. the Camciuc, M., Bessire, J.M., Vilarem, G., and Gaset, A. 114:10834, Selvaraj M., Sinha P.K., Pandurangan A. By clicking accept or continuing to use the site, you agree to the terms outlined in our. WikiMili Pentyl butyrate Last updated May 30, 2020 [1, 2, 3, 4, 5, 6]. Various grades of quality available suitable for all applications. This chemical is used as an additive in cigarettes. HSN Code. (1989) J. Catal. Your source for quantitative metabolomics technologies and bioinformatics. Used in food flavouring Pentyl butyrate, also known as pentyl butanoate or amyl butyrate, is an ester that is formed when pentanol is reacted with butyric acid, usually in the presence of sulfuric acid as a catalyst. Isoamyl acetate, also known as isopentyl acetate, is an organic compound that is the ester formed from isoamyl alcohol and acetic acid, with the molecular formula Pentyl butyrate - Wikiwand Catal. The John D. Walsh Company, Inc. is proud to be a founding member of IFEAT, an active member of IFRA, North America, and a corporate sponsor of the WFFC. Chem. Pentyl butyrate - Wikipedia And we custom manufacture new products according to customers needs, and serve good quality products and service. At Penta, our products and services help businesses do business better. 120:78. US / EU / FDA / JECFA / FEMA / FLAVIS / Scholar / Patent Information: Flavor: Sweet, Fruity, Banana, Pineapple, Tropical, Odor: estery, fruity, sweet, fermenty; apricot-, banana-, pineapple-like, Odor: Sweet, Fruity, Banana, Pineapple, Cherry, Tropical, Odor: Sweet fruity banana pineapple cherry tropical. Sec. Follow the links above to find out more about the data Epub 2006 Aug 10. Adams, R.P. a collection of critically evaluated thermodynamic property data for pure compounds with a primary focus on organics. We have been working for 100 years. Pentyl Butanoate - Part of Springer Nature. (1986) Synth. Ultrasensitive flexible graphene based field-effect transistor (FET)-type bioelectronic nose. Where the world comes to its senses - Berj is a global distributor of Essential Oils and Aromatic Chemicals. Pentyl butanoate is found in banana, apple and apricot fruits. R 36/37/38 - Irritating to eyes, respiratory system, and skin. The purpose of the fee is to recover costs associated [1] This comprehensive analysis revealed four potential pathways for the synthesis of butyrate, starting with acetyl-CoA, glutarate, lysine, or succinate. LOTUS - the natural products occurrence database. These data were generated through dynamic data analysis, as implemented in the NIST ThermoData Engine software package [ 1, 2, 3, 4, 5, 6 ]. Raspberry butyricacid, 2.5 ch3ch2ch2cooch2ch2ch2ch2ch3, butanoate pentyl 3, diagram 3.5, n-amyl butanoate n-butyrate. [5] Banana oil commonly refers to a solution of isoamyl acetate in ethanol that is used as an artificial flavor. Synthesis of amyl butyrate | expabiminthosthartmanzamisordown (1968) AIChEJ 14:606, Beck J.S., Vartuli J.C., Roth W.J., Leonowicz M.E., Kresge C.T., Schmitt K.D., Chu C.T.W., Olson D.H., Sheppard E.W., McCullen S.B., Higgins J.B., Schlenker J.L. Whole go out finished product during, vapor pressure 0.150.20MPa (gauge pressure) in the serious reciprocal of duty cycle 0.07330.0753MPa of control tower, 8285 of tower top temperatures, 9295 of tower still feed temperatures, the chuck.In early stage that goes out finished product and mid-term, the control reflux rate is 90100 liters/hour, to go out finished product speed be 150160 liters/hour; In the later stage that goes out finished product, reflux rate is reduced to 5030 liters/hour gradually, goes out that finished product speed is also corresponding reduces to 5030 liters/hour; When going out finished product speed and reduce to about 20 liters/hour, fragrance is commented in sampling at any time, changes slightly as fragrance, promptly finishes finished product. This chemical is used as an additive in cigarettes. Pentyl butyrate540-18-1lookchem scientific judgement. We have expanded our offerings to the nutraceutical, industrial, and resin markets with a growing roster of versatile and unique ingredients. This ester has a smell reminiscent of pear or apricot. Robert D. Chirico, Joseph W. Magee, Ilmutdin Abdulagatov and Michael Frenkel. 1987. Packing. amyl 2-methyl butyrate, 68039-26-9 - The Good Scents Company doi:10.1128/mBio.00889-14. Simple Structure Advanced Comment on this record 3D Pentyl butyrate Molecular Formula CHO Average mass 158.238 Da Monoisotopic mass 158.130676 Da ChemSpider ID 10428 More details: A. Pandurangan. Pentyl butyrate was obtained as the only product. Semantic Scholar is a free, AI-powered research tool for scientific literature, based at the Allen Institute for AI. This is a preview of subscription content, access via your institution. about: Since 1982, Charkit has been committed to expanding the markets we serve as our roster of products and services continues to grow with us. 7 As of May 2012, the Professional Edition contains information on 28432 compounds and total of 531486 evaluated data points. Our substantial portfolio of personal care ingredients now include a wide array of luxury and exotic components to compliment the key products we have always offered. Isoamyl acetate, also known as isopentyl acetate, is an organic compound that is the ester formed from isoamyl alcohol and acetic acid, with the molecular formula .It is a colorless liquid that is only slightly soluble in water, but very soluble in most organic solvents.Isoamyl acetate has a strong odor which is described as similar to both banana and pear. 48:311-315. https://doi.org/10.1007/s10562-007-9073-1. .It is a colorless liquid that is only slightly soluble in water, but very soluble in most organic solvents. Because the short-chain fatty acids (SCFAs) produced by bacterial fermentation of carbohydrates in the human gut are so essential to many of the microbiota-mediated effects on human metabolism, we decided to investigate how SCFAs specifically, butyrate are synthesized by our microbial companions. Pentyl butyrate, also known as pentyl butanoate or amyl butyrate, is an ester that is formed when pentanol is reacted with butyric acid, usually in the presence of sulfuric acid as a catalyst. list and any other products We owe our success to our This ester has a smell reminiscent of pear or apricot. Cunnigham, D.G., Acree, T.E., Barnard, J., Butts, R.M., and Braell, P.A. 80:427, Corma A., Garcia H., Iborra S., Primo J. We make global local. As a solvent and carrier for materials such as nitrocellulose, it was extensively used in the aircraft industry for stiffening and wind-proofing fabric flying surfaces, where it and its derivatives were generally known as 'aircraft dope'. National Institute of Standards and Technology, Triple point temperature (Crystal 1, Liquid, and Gas), Normal boiling temperature (Liquid and Gas), Boiling temperature (Liquid in equilibrium with Gas) as a function of Pressure, Phase boundary pressure (Liquid in equilibrium with Gas) as a function of Temperature, Density (Liquid in equilibrium with Gas) as a function of Temperature, Density (Gas) as a function of Temperature and Pressure, Density (Gas in equilibrium with Liquid) as a function of Temperature, Enthalpy of phase transition (Crystal 1 to Liquid in equilibrium with Gas), Enthalpy of vaporization or sublimation (Liquid to Gas) as a function of Temperature, Heat capacity at saturation pressure (Liquid in equilibrium with Gas) as a function of Temperature, Heat capacity at constant pressure (Ideal Gas) as a function of Temperature, Enthalpy (Liquid in equilibrium with Gas) as a function of Temperature, Enthalpy (Ideal Gas) as a function of Temperature, Surface tension (Liquid in equilibrium with Gas) as a function of Temperature, Viscosity (Gas) as a function of Temperature and Pressure, Viscosity (Liquid in equilibrium with Gas) as a function of Temperature, Thermal conductivity (Gas) as a function of Temperature and Pressure, Thermal conductivity (Liquid in equilibrium with Gas) as a function of Temperature. The integrated, BACKGROUND: The synthesis of butyl butyrate (used as a pineapple flavor) by green chemistry is of immense importance to the food industry. Berj is a family-owned business that has been in operation for six decades. By the ethyl butyrate that above-mentioned novel process is produced, through the test of national spice product quality examination center, main test result is as follows respectively: 1. vapor-phase chromatography (used gas chromatograph is the GC-7AG type that day island proper Tianjin company produces, and adopts normalization method, detect according to be GB11539-89): Numbering 1: chromatogram content 99.94%; Numbering 2: chromatogram content 99.89%; Numbering 3: chromatogram content 99.94%; 2. conventional method (detect according to be GB4349-84): Numbering 4: content 99.4%, refractive index (20 ) 1.3924; Numbering 5: content 99.4%, refractive index (20 ) 1.3925; Numbering 6: content 100%, refractive index (20 ) 1.3928. More than 70 years of synthesis experience and multi-purpose plants enable TCI to offer more than 30,000 products as well as custom synthesis. 96:246, Article Google Scholar, Bertin J., Hagan K., Luche J.L., Silton R. (1974) J. 183:76, Shanmugapriya K., Murugesan V., Palanichamy M., Banumathi Arabindoo M. (2004) J. Catal. Isoamyl acetate has a strong odor which is described as similar to both banana and pear. DSM Nutritional Products the 132nd, light daily use chemicals office of Ministry of Light Industry (87) " literary composition], the butyric acid of special class national enterprises and alcoholic acid unit consumption standard are respectively 0.966 ton/ton and 0.551 ton/ton, the butyric acid of class-one national enterprises and alcoholic acid unit consumption standard are respectively 0.976 ton/ton and 0.568 ton/ton, the butyric acid of second-class state enterprise and alcoholic acid unit consumption standard are respectively 1.015 tons/ton and 0.612 ton/ton, and butyric acid of the present invention and alcoholic acid average quantity used in unit volume blasted only are 0.8102 ton/ton and 0.4860 ton respectively); (3) production cost reduces about 25%; (4) equipment capacity (reactor with unit volume calculates) improves about 8 times; (5) facility investment reduces about 40%; (6) wastewater discharge reduces about 90%; (7) quality product reaches U.S. FCCIII standard. Your institution may already be a subscriber. 16:1423, CAS 2000 Oct;1(1):31-9. Low Price!! In situ separation of a chiral target compound is realized for the first time as distillate on top of an integrated biocatalytic batch reactive distillation column. This chemical is used as an additive in cigarettes. 19:137-147. However, NIST makes no warranties to that effect, and NIST Alternatively, p-toluenesulfonic acid or an acidic ion exchange resin can be used as the catalyst. U.S. chemical abstract (C.A. Pentyl butyrate, also known as pentyl butanoate or amyl butyrate, is an ester that is formed when pentanol is reacted with butyric acid, usually in the presence of sulfuric acid as a catalyst. With our experience, we can rapidly and safely connect you with the best suppliers on the market, providing you with a complete search, consulting and assistance service. We have nearly 500 kinds of products, from grams to tons, exported to USA, Europe, South Asia and etc. [Correlation of Grignard's reagent 3-chloro-2,4-dimethylpentene-1 with diisopropylketone, ethylformate, and amyl-butyrate]. The authors are grateful to DRDO for providing fund for this research work. shall not be liable for any damage that may result from errors or omissions in The John D. Walsh Company, Inc. has evolved from its beginnings as an agent/broker into a distributor of essential oils, aroma chemicals, concretes and absolutes. Provided by the Springer Nature SharedIt content-sharing initiative, Over 10 million scientific documents at your fingertips, Not logged in Bottle / Drum. sweet fruity banana pineapple cherry tropical, Sweet, fruity, banana, pineapple and cherry, with a tropical nuance, Sweet, fruity, banana, pineapple and tropical, estery, fruity, sweet, fermenty; apricot-, banana-, pineapple-like, ECSA TRADE THE MOST UPDATED FINANCIAL PUBLICATION ON THE WORLD OF CHEMISTRY, 500868 Amyl Butyrate (Mixed Isomers 35/65), Predict (works with chrome, Edge or firefox), No longer provide for the use of these seven synthetic flavoring substances, FDA PART 172 -- FOOD ADDITIVES PERMITTED FOR DIRECT ADDITION TO FOOD FOR HUMAN CONSUMPTION. ChemSpider ID 453396. 4. wash ester in order to keep the fragrance of edible ethyl butyrate, the thick ester of above-mentioned ethyl butyrate is washed till PH78 with light buck (liquid caustic soda consumption be thick ester weight 23%) earlier, wash with twice clear water, lower floor's washing water discard. - 177.70.122.175. O Chemical specialist in manufacturing, distributing and sourcing of tailor-made ingredients for the Flavour & Fragrance industry. are industrial, for example, can be used for preparing fruit flavouring food flavour and Daqu type . Pentyl synthesis butanoate banana butyricacid, to butyrate; an chloroethane. European Food Safety Authority (EFSA) reference(s): Flavouring Group Evaluation 2, Revision 1 (FGE.02) : Branched- and straight-chain aliphatic saturated primary alcohols and related esters of primary alcohols and straight-chain carboxylic acids and one straight-chain aldehyde from chemical groups 1 and 2 (Commission Regulation (EC) No 1565/2000 of 18 July 2000) - Opinion of the Scientific Panel on Food Additives, Flavourings, Processing Aids and Materials in contact with Food (AFC), Scientific Opinion on the safety and efficacy of straight-chain primary aliphatic alcohols/aldehydes/acids, acetals and esters with esters containing saturated alcohols and acetals containing saturated aldehydes (chemical group 1) when used as flavourings for all animal species. C Odor and/or flavor descriptions from others (if found). This paper reports experimental and modeling work concerning alcoholysis reactions between butanol and ethyl butanoate, catalyzed by Lipozyme in n -hexane, using a batch stirred system at 60C. This ester has a smell reminiscent of pear or apricot. Custom manufacturer and distributor of specialty ingredients. Butyl butyrate | C8H16O2 - PubChem compound Summary Butyl butyrate Cite Download Contents 1 Structures 2 Names and Identifiers 3 Chemical and Physical Properties 4 Spectral Information 5 Related Records 6 Chemical Vendors 7 Food Additives and Ingredients 8 Pharmacology and Biochemistry 9 Use and Manufacturing 10 Safety and Hazards 11 Toxicity M&U dedicates itself to the development and production of new products as well as continuously promoting those new products. Present domestic ethyl butyrate manufacturer adopts traditional single pot of esterification technique intermittently mostly, this technology is summarized as follows: adopting butyric acid and ethanol is raw material, in the preparation process of industrial ethyl butyrate, generally adopting materials such as benzene to form ternary azeotrope with ethanol, water, thus except that the method for anhydrating comparatively common; In the preparation process of edible ethyl butyrate, for pure property and the edible security that keeps product, do not allow material such as benzene to participate in the technological process, so the production of edible ethyl butyrate generally adopts butyric acid and excess ethanol to carry out esterification, after esterification finishes, add in the liquid caustic soda and nonesterified butyric acid, make it to generate Sodium propanecarboxylate and layering, ethyl butyrate thick ester in upper strata is after washing, rectifying, get the ethyl butyrate finished product, lower floor's Sodium propanecarboxylate solution adds the vitriol oil and carries out acidifying, dehydration after reclaiming ethanol, concentrating, thus the recovery part butyric acid.The subject matter that this traditional technology exists is; The butyric acid productive rate only is 7380%, the raw material consumption height, the production cycle is long, equipment capacity is low, facility investment is big, wastewater discharge is big etc. Res. The standard temperature for the synthesis reaction was 45 C. GST Tax Rate. Ton ethyl butyrate surplus the employing the present invention of State-Owned Wujiang Perfumery has produced 550, nearly 4 years production practice prove that the present invention compared with prior art has the following advantages: (1) productive rate height (the butyric acid productive rate reaches 96.1%, improves about 20% than prior art); (2) raw material consumption is low (compares with the ethyl butyrate raw material consumption standard of national-level enterprise [selecting from " No. on behalf of the United States of America. Sample college essay on leadership high school, college student council pass quality of your roles, and sophisticated 2014 did he feel that were a custom. NIST subscription sites provide data under the This study investigated the enzymatic esterification of. 2006 Oct;47(10):2101-11. SAFETY Pentyl butanoate is found in apple. In whole continuously dehydrating esterification process, vapor pressure 0.580.60MPa (gauge pressure) in 87.888.0 of tower top temperatures of control, 118120 of tower still reacting liquid temperatures, the chuck, the ester amount that contains of the thick ester of upper strata ethyl butyrate that is taken out is 9596%, acidity is 0.20.4%, and the ester amount that contains of the lower layer of water of being taken out is 0.81.0%, acidity is 0.30.4%, contain amount of alcohol is 24%. Vital, M., Howe, A. C., & Tiedje, J. M. (2014). Retention indices in the analysis of food aroma volatile compounds in temperature-programmed gas chromatography: database creation and evaluation of precision and robustness. IUPAC Standard InChIKey: CFNJLPHOBMVMNS-UHFFFAOYSA-N Copy CAS Registry Number: 540-18-1 Chemical structure: This structure is also available as a 2d Mol file; Other names: Butyric acid, pentyl ester; n-Amyl butyrate; n-Pentyl n-butyrate; Amyl butyrate; Pentyl butanoate; Pentyl butyrate; 1-Pentyl butyrate; n-Pentyl butanoate; UN 2620; n-Amyl n-butyrate; Amyl butanoate; n-Pentyl butyrate Catal. The 3 ECSA-owned warehouses guarantee considerable storage area and capacity in each warehouse, with full availability of products (base chemicals and speciality chemicals). The object of the present invention is to provide that a kind of productive rate height, good economy performance, equipment capacity are big, good product quality and the reliable process for producing ethyl butyrate of stable operation. An enantioselective biocatalytic reaction was carried out for the first time in a fully integrated batch reactive distillation setup to allow reproducible coatings which also can be applied on larger surfaces. WIDESPREAD DISTRIBUTION one of Europes references when it comes to essential oils and aroma chemicals, and it is now well known all around the world. Our goal is to become a fine chemical enterprise which could provide special products and services. 73:347, Chen D., Wang J., Li .J (2002) Huaxue Shiji 24:235, (Chinese), Mao S. (1995) Huaxue Shiji 17(2):121, (Chinese), Harve P.W., Kabel R.L. PENTYL BUTYRATE Structure - C9H18O2 - Over 100 million chemical Study on the synthesis of amyl butyrate catalyzed by solid superacid Reduction of odor and nasal pungency associated with aging. Ventos has specialized in the distribution of raw materials for the flavour and fragrance industry. Pentyl butyrate | C9H18O2 | ChemSpider For medical information relating to Covid-19, please consult the World Health Organisation or local healthcare provision. {\displaystyle {\ce {C7H14O2}}} We fully understand the demands of the F&F industry and we endeavour to supply quality products, with ready availability and a personalised service. 2023 Springer Nature Switzerland AG. Supplying the fragrance and flavor industry with high quality products. QUALITY Chem. Mechanism for the synthesis of butyrate from acetyl-CoA following saccharolytic fermentation in gut bacteria; enzyme names are included in capital letters adjacent to each step. For over 30 years, Penta Manufacturing Company has played a growing role in worldwide chemistry innovations and applications. Idukern F&F Ingredients is your partner for the fragrance and flavor ingredients. from the historical Our Pharmaceutical offerings continue to expand, still anchored by the Boronic Derivatives that meet the demands of Suzuki coupling reactions. (1964) 2683. Standard Reference Data Program Soc. Lipidomics: a global approach to lipid analysis in biological systems. The original Alfa Aesar product / item code or SKU refer to the industry, and and Informatics, NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data). 4:249, Climent M.J., Corma A., Iborra S., Miquel S., Primo J., Rey F. (1999) J. Catal. The first enzymatic synthesis of banana volatile (S)-2-pentyl (R)-3-hydroxyhexanoate in 79 % yield and high optical purity is presented. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993). Revealing the Bacterial Butyrate Synthesis Pathways by Analyzing (Meta)genomic Data. Al-MCM-41 molecular sieves with Si/Al ratios 25, 50, 75 & 100 were synthesized hydrothermally and characterized systematically by various analytical and spectroscopy techniques. We continue to lead the way in our traditional markets such as Metal and Water Treatment, Imaging, Flavor & Fragrance, Aroma and Food. 19930519, Document name: SPEED Over 30,000 Reagents available today in benchtop to bulk quantities. (1992) J. Innovation and commitment in the name of excellence. Mesopor. pentyl butanoate synthesis - Thepigeonspecialistphxaz.com Privacy Policy/Security Notice/Accessibility Statement/Disclaimer/Freedom of Information Act (FOIA) LipaseCatalyzed Synthesis of Butyl Butyrate by Alcoholysis in an (2004) Micropor. Written mechanism of pentyl butyrate synthesis using Fischer Old-age deficits in the sense of smell as gauged by thresholds, magnitude matching, and odor identification. With an organisation divided into industrial segments managed by specialists, it has become one of the largest distributors worldwide. synthesis of amyl butyrate Profiles: selected leaders of the national woman's party - pictures and research from women's suffrage - primary source set from the library of congress. in these sites and their terms of usage. 3e-4, butyl pentyl hexanoate and how 540-18-1 names: pentyl wikipedia. Distributed by: tert-Amyl butyrate. The present invention is explained in detail by embodiment below in conjunction with accompanying drawing; 1. it is raw material that the present invention for preparing burden adopts butyric acid (content 9798%) and ethanol (content 9293%), with sulfuric acid is catalyzer, the bed material proportioning is a butyric acid: ethanol=3.05.0: 1 (mol ratio), dripping the material proportioning is butyric acid: ethanol=0.851.05: 1 (mol ratio).
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