GB400413A - Process for the production of lactic acid - Google Patents

Process for the production of lactic acid

Info

Publication number
GB400413A
GB400413A GB29464/32A GB2946432A GB400413A GB 400413 A GB400413 A GB 400413A GB 29464/32 A GB29464/32 A GB 29464/32A GB 2946432 A GB2946432 A GB 2946432A GB 400413 A GB400413 A GB 400413A
Authority
GB
United Kingdom
Prior art keywords
lactate
zinc
solution
calcium
lactic acid
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
GB29464/32A
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.)
Standard Brands Inc
Original Assignee
Standard Brands Inc
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 Standard Brands Inc filed Critical Standard Brands Inc
Publication of GB400413A publication Critical patent/GB400413A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
    • C07C51/295—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with inorganic bases, e.g. by alkali fusion
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/02—Preparation of carboxylic acids or their salts, halides or anhydrides from salts of carboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/41—Preparation of salts of carboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/41—Preparation of salts of carboxylic acids
    • C07C51/412—Preparation of salts of carboxylic acids by conversion of the acids, their salts, esters or anhydrides with the same carboxylic acid part
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/42—Separation; Purification; Stabilisation; Use of additives
    • C07C51/43—Separation; Purification; Stabilisation; Use of additives by change of the physical state, e.g. crystallisation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Inorganic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Zinc lactate is produced by adding zinc sulphate solution to a solution of calcium lactate obtained by the reaction of a carbohydrate with calcium hydroxide. Preferably the lactate and sulphate solutions are both hot, and the calcium sulphate is removed while the mixture is hot, and zinc lactate is crystallized by cooling.ALSO:Carbohydrates are converted into lactic acid by heating to at least 200 DEG C. under pressure above atmospheric (such as 20-35 atmospheres) with an alkali or alkaline-earth hydroxide. From the product insoluble matter is removed, and the lactic acid is recovered as such, for instance, by addition of sulphuric acid or as zinc lactate by addition of zinc sulphate. In an example, cane sugar is dissolved in hot water to make a solution of about 40 per cent, calcium hydroxide is added, and the mixture is heated to 210-220 DEG C. at 25-30 atmospheres pressure with stirring for 1,5-2,5 hours. The filtered reaction liquor may be allowed to stand at room temperature or at 5-10 DEG C., preferably with stirring, to crystallize calcium lactate, sulphuric acid being added to the mother liquor to liberate lactic acid; or sulphuric acid may be added to the whole solution to obtain lactic acid. Alternatively the calcium lactate solution may be treated with zinc sulphate solution, both solutions being preferably hot. The calcium sulphate is removed while the liquor is hot and zinc lactate is crystallized out by cooling. The mother liquor may be treated with sulphuretted hydrogen or barium sulphide to produce lactic acid by removing the zinc, in the latter case sulphuric acid being then added to remove the barium.
GB29464/32A 1931-10-29 1932-10-21 Process for the production of lactic acid Expired GB400413A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US400413XA 1931-10-29 1931-10-29

Publications (1)

Publication Number Publication Date
GB400413A true GB400413A (en) 1933-10-26

Family

ID=21908762

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29464/32A Expired GB400413A (en) 1931-10-29 1932-10-21 Process for the production of lactic acid

Country Status (1)

Country Link
GB (1) GB400413A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2484674A (en) * 2010-10-18 2012-04-25 Plaxica Ltd Process for producing a lactic acid-amine complex
WO2012131299A1 (en) 2011-03-28 2012-10-04 Plaxica Limited Process for producing lactate
WO2013140188A1 (en) 2012-03-23 2013-09-26 Plaxica Limited Process for the production of a complex of lactic acid and an amine
WO2015033159A1 (en) * 2013-09-06 2015-03-12 Plaxica Limited Lactate production process
WO2015155535A1 (en) * 2014-04-09 2015-10-15 Plaxica Limited Process for producing lactate
WO2015155533A1 (en) * 2014-04-09 2015-10-15 Plaxica Limited Lactate production process
WO2015155534A1 (en) * 2014-04-09 2015-10-15 Plaxica Limited Biomass processing method

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012052703A1 (en) 2010-10-18 2012-04-26 Plaxica Limited Process for producing a lactic acid-amine complex
GB2484674A (en) * 2010-10-18 2012-04-25 Plaxica Ltd Process for producing a lactic acid-amine complex
WO2012131299A1 (en) 2011-03-28 2012-10-04 Plaxica Limited Process for producing lactate
WO2013140188A1 (en) 2012-03-23 2013-09-26 Plaxica Limited Process for the production of a complex of lactic acid and an amine
CN105473543A (en) * 2013-09-06 2016-04-06 普拉克西卡有限公司 Lactate production process
WO2015033159A1 (en) * 2013-09-06 2015-03-12 Plaxica Limited Lactate production process
CN105473543B (en) * 2013-09-06 2017-08-15 普拉克西卡有限公司 Lactate manufacture method
US9604895B2 (en) 2013-09-06 2017-03-28 Plaxica Limited Lactate production process
WO2015155533A1 (en) * 2014-04-09 2015-10-15 Plaxica Limited Lactate production process
GB2533072A (en) * 2014-04-09 2016-06-08 Plaxica Ltd Biomass processing method
GB2533072B (en) * 2014-04-09 2016-11-02 Plaxica Ltd Method for the processing of an aqueous hemicellulosic stream
WO2015155534A1 (en) * 2014-04-09 2015-10-15 Plaxica Limited Biomass processing method
WO2015155535A1 (en) * 2014-04-09 2015-10-15 Plaxica Limited Process for producing lactate
US10174131B2 (en) 2014-04-09 2019-01-08 Sappi Biotech Uk Ltd Biomass processing method

Similar Documents

Publication Publication Date Title
US2024565A (en) Process for the production of lactic acid
GB400413A (en) Process for the production of lactic acid
US2760992A (en) Naphthalene
US2365417A (en) Process of manufacturing sodium cyanide
GB777782A (en) Purification of terephthalic acid
US2303602A (en) Calcium tartrate production
GB173479A (en) Improved process of purifying lactic acid
US1566819A (en) Carnie b
US1470039A (en) Process of making 2-3 oxy-naphthoic acid
US2226576A (en) Method of making sodium hyposulphite
US2159155A (en) Process for the manufacture of sodium citrate di-hydrate
US1958760A (en) Manufacture of sodium sulphate
US1755362A (en) Method of making sodium salicylates
GB460281A (en) Improvements in or relating to the production of potassium sulphate
US1500995A (en) Manufacture of caustic soda
US1240766A (en) Process for the production of lactic acid.
US1580714A (en) Process of producing naphthol-sulphonic acids
US1812250A (en) Manufacture of barium hydroxide and strontium hydroxide
GB761371A (en) Improvements in or relating to the manufacture of sodium perborate
US1368789A (en) Process of making acetic anhydrid
US1923248A (en) Process for making 6-bromo-2-hydroxy-naphthalene-3-carboxylic acid
DE549723C (en) Process for the production of boric acid in solid form
GB670003A (en) Improvements in or relating to process of producing glutamic acid and the glutamic acid resulting from said process
GB353921A (en) Improvements in and relating to the production and purification of salicylic acid or?-cresotinic acid or their salts
GB435721A (en) Improvements in process for preparing metol