GB136979A - Improvements in the Purification of Calcium Citrate and the Manufacture of Citric Acid. - Google Patents
Improvements in the Purification of Calcium Citrate and the Manufacture of Citric Acid.Info
- Publication number
- GB136979A GB136979A GB692819A GB692819A GB136979A GB 136979 A GB136979 A GB 136979A GB 692819 A GB692819 A GB 692819A GB 692819 A GB692819 A GB 692819A GB 136979 A GB136979 A GB 136979A
- Authority
- GB
- United Kingdom
- Prior art keywords
- calcium citrate
- citric acid
- calcium
- treatment
- sulphur dioxide
- 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
- C07C51/42—Separation; Purification; Stabilisation; Use of additives
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Calcium citrate is purified by treatment with sulphur dioxide in the presence of water, the resulting solution of calcium p bisulphite and citric acid being then boiled, after removing organic matter by filtration, to drive off the sulphur dioxide and re-form the calcium citrate. The precipitated calcium citrate is filtered off, washed, and again subjected to the preceding treatment until sufficiently pure, when it may be decomposed with sulphuric acid to produce citric acid. The sulphur dioxide driven off is available for the treatment of further calcium citrate. When the raw material consists of lime juice or lemon-juice, it is directly treated with calcium bisulphite, the subsequent treatment being as before.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB692819A GB136979A (en) | 1919-03-20 | 1919-03-20 | Improvements in the Purification of Calcium Citrate and the Manufacture of Citric Acid. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB692819A GB136979A (en) | 1919-03-20 | 1919-03-20 | Improvements in the Purification of Calcium Citrate and the Manufacture of Citric Acid. |
Publications (1)
Publication Number | Publication Date |
---|---|
GB136979A true GB136979A (en) | 1919-12-31 |
Family
ID=9823398
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB692819A Expired GB136979A (en) | 1919-03-20 | 1919-03-20 | Improvements in the Purification of Calcium Citrate and the Manufacture of Citric Acid. |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB136979A (en) |
-
1919
- 1919-03-20 GB GB692819A patent/GB136979A/en not_active Expired
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