- METHOD OF PREPARING HYDROXYALKYLCARBOXYLIC ACID ESTERS
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The present invention relates to a method of preparing an ester by reacting a carboxyl acid with a (C1-C36)alcohol in the presence of a catalyst. The method is particularly suitable for the reaction of hydroxyalkylcarboxylic acids and fatty alcohols.
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Page/Page column 15; 16; 17
(2018/04/27)
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- PROCESS FOR PRODUCING A LACTIC ESTER FROM A FERMENTATION LIQUOR CONTAINING AMMONIUM LACTATE
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The present invention relates to an industrial process for producing a lactic ester containing in total at least seven carbon atoms, from a fermentation liquor containing ammonium lactate in order to avoid the inherent production of gypsum, with a high yield and according to which the loss of lactic ester in the form of lactamide is limited as much as possible.
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Paragraph 0058
(2013/10/22)
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- Continuous Method For Producing Esters Of Aliphatic Carboxylic Acids
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The invention relates to a continuous method for producing aliphatic carbonic acid esters by reacting at least one aliphatic carboxylic acid of formula (I) R1—COOH (I), wherein R1 represents hydrogen or an optionally substituted aliphatic hydrocarbon group with 1 to 50 carbon atoms, with at least one alcohol of formula (II) R2—(OH)n (II), wherein R2 represents an optionally substituted hydrocarbon group with 1 to 100 C atoms and n is an integer from 1 to 10, in the presence of at least one transesterification catalyst in a reaction tube the longitudinal axis of which extends in the direction of propagation of the microwaves of a monomode microwave applicator, under microwave irradiation to form the ester.
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Page/Page column 10
(2012/05/07)
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- Continuous Process for Obtaining a Lactic Ester
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Continuous method for obtaining a lactic ester, characterised in that it comprises the following steps: a) esterification reaction of a composition comprising an alcohol in the presence of a composition comprising lactic acid in excess,b) extraction of a vapour phase from this reaction medium, containing lactic ester, alcohol, water and traces of lactic acid;c) distillation of the vapour phase obtained at step b) in order to recover the lactic ester, alcohol and water at the top;d) distillation of the fraction obtained at step c) in order to recover the purified lactic ester at the bottom.
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Page/Page column 4
(2011/07/08)
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- A mild and efficient method for esterification and transesterification catalyzed by iodine
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Iodine, was found to be a practical and useful Lewis acid catalyst for the esterification of carboxylic acids with alcohols. The high catalytic activity of iodine can be used for the transesterification of esters by different alcohols including tertiary alcohols and sterically hindered primary and secondary alcohols. The method presented is especially effective for simultaneous esterification and transesterification reactions.
- Ramalinga,Vijayalakshmi,Kaimal
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p. 879 - 882
(2007/10/03)
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- Process for the preparation of alkyl esters from commercial lactic acid
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The present invention relates to a catalyst-free process for the conversion of commercial lactic acid to alkyl ester of carbon C1to C8which comprises simultaneous hydrolysis of dimers or highpolymers of lactic acid present in commercial lactic acid to free lactic acid and esterification of free lactic acid with an alcohol in the presence of water at a temperature in the range of 130-250° C. for 4-11 hrs at a pressure of 5-25 kg/cm2, to obtain desired esters.
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