GB907322A - Purification and esterification of lactic acid - Google Patents

Purification and esterification of lactic acid

Info

Publication number
GB907322A
GB907322A GB2211558A GB2211558A GB907322A GB 907322 A GB907322 A GB 907322A GB 2211558 A GB2211558 A GB 2211558A GB 2211558 A GB2211558 A GB 2211558A GB 907322 A GB907322 A GB 907322A
Authority
GB
United Kingdom
Prior art keywords
lactic acid
esterification
ether
ion
isopropyl
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2211558A
Inventor
Michael Henry Miller Arnold
Clifford George Childs
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BOWMANS CHEMICALS Ltd
Original Assignee
BOWMANS CHEMICALS Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BOWMANS CHEMICALS Ltd filed Critical BOWMANS CHEMICALS Ltd
Priority to GB2211558A priority Critical patent/GB907322A/en
Publication of GB907322A publication Critical patent/GB907322A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/42Separation; Purification; Stabilisation; Use of additives
    • C07C51/48Separation; Purification; Stabilisation; Use of additives by liquid-liquid treatment
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/09Preparation of carboxylic acids or their salts, halides or anhydrides from carboxylic acid esters or lactones
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C67/00Preparation of carboxylic acid esters
    • C07C67/08Preparation of carboxylic acid esters by reacting carboxylic acids or symmetrical anhydrides with the hydroxy or O-metal group of organic compounds

Abstract

Lactic acid esters are prepared from impure lactic acid in an ether e.g. isopropyl ether, solvent, by stripping off the ether and passing the liquid or molten acid directly to an esterification vessel where it is esterified by a volatile alcohol and purified by distillation. The process may be continuous with recycling of the by-products of the stages and the esterification may be with a sulphuric acid catalyst or an ion-exchange resin and methyl, ethyl, isopropyl, n-propyl, butyl and amyl alcohols are specified. The ester may be hydrolysed preferably with superheated steam with or without catalysts or ion-exchange resins to yield pure lactic acid. Specification 907,321 is referred to.
GB2211558A 1958-07-10 1958-07-10 Purification and esterification of lactic acid Expired GB907322A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2211558A GB907322A (en) 1958-07-10 1958-07-10 Purification and esterification of lactic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2211558A GB907322A (en) 1958-07-10 1958-07-10 Purification and esterification of lactic acid

Publications (1)

Publication Number Publication Date
GB907322A true GB907322A (en) 1962-10-03

Family

ID=10174140

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2211558A Expired GB907322A (en) 1958-07-10 1958-07-10 Purification and esterification of lactic acid

Country Status (1)

Country Link
GB (1) GB907322A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3716584A (en) * 1969-05-23 1973-02-13 Rhone Poulenc Sa Process for the purification of lactic acid
FR2463496A1 (en) * 1979-08-09 1981-02-20 Int Standard Electric Corp PROCESS FOR DEPOSITING POROUS METAL FILM ON METALLIC OR PLASTIC SUBSTRATE AND APPLICATION IN THE MANUFACTURE OF ELECTROLYTIC CAPACITORS
US5965771A (en) * 1997-10-03 1999-10-12 The Regents Of The University Of California Regeneration of carboxylic acid-laden basic sorbents by leaching with a volatile base in an organic solvent

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3716584A (en) * 1969-05-23 1973-02-13 Rhone Poulenc Sa Process for the purification of lactic acid
FR2463496A1 (en) * 1979-08-09 1981-02-20 Int Standard Electric Corp PROCESS FOR DEPOSITING POROUS METAL FILM ON METALLIC OR PLASTIC SUBSTRATE AND APPLICATION IN THE MANUFACTURE OF ELECTROLYTIC CAPACITORS
US5965771A (en) * 1997-10-03 1999-10-12 The Regents Of The University Of California Regeneration of carboxylic acid-laden basic sorbents by leaching with a volatile base in an organic solvent

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