GB400413A - Process for the production of lactic acid - Google Patents
Process for the production of lactic acidInfo
- 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
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.
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)
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 |
-
1932
- 1932-10-21 GB GB29464/32A patent/GB400413A/en not_active Expired
Cited By (14)
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 |
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