GB380813A - Crystalline anhydrous citric acid and method of making same - Google Patents
Crystalline anhydrous citric acid and method of making sameInfo
- Publication number
- GB380813A GB380813A GB17853/31A GB1785331A GB380813A GB 380813 A GB380813 A GB 380813A GB 17853/31 A GB17853/31 A GB 17853/31A GB 1785331 A GB1785331 A GB 1785331A GB 380813 A GB380813 A GB 380813A
- Authority
- GB
- United Kingdom
- Prior art keywords
- citric acid
- solution
- oversaturation
- temperature
- effected
- 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
- 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)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Oversaturation is effected in a saturated aqueous solution of citric acid at a temperature between 41 and 100 DEG C., so that the excess acid is crystallized out in the anhydrous state. Oversaturation may be effected by adding solid, hydrated citric acid to a solution saturated and maintained at, for example, 55 DEG C., or by continued evaporation at the boiling-point under an absolute pressure of more than 1\ba1/4\be inches of mercury, or by concentration in a similar way to about 42 DEG B<\>ae., and then heating under atmospheric pressure to 75 or 80 DEG C., after which the solution is allowed to cool in a crystallization pan to a temperature not below 41 DEG C.ALSO:Anhydrous citric acid is produced by effecting oversaturation in a saturated aqueous solution of citric acid at a temperature between 41 DEG and 100 DEG C. Oversaturation may be effected by adding solid, hydrated citric acid to a solution saturated and maintained at, for example, 55 DEG C., or by continued evaporation at the boiling point under an absolute pressure of more than 1\ba1/4\be inches of mercury, or by concentration under similar conditions to about 42 DEG B<\>ae. and then heating under atmospheric pressure to 75 DEG or 80 DEG C., after which the solution is allowed to cool in a crystallizing pan to a temperature not below 41 DEG C.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US380813XA | 1931-01-07 | 1931-01-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB380813A true GB380813A (en) | 1932-09-19 |
Family
ID=21897991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB17853/31A Expired GB380813A (en) | 1931-01-07 | 1931-06-19 | Crystalline anhydrous citric acid and method of making same |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB380813A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110407687A (en) * | 2019-08-16 | 2019-11-05 | 上海蓝滨石化设备有限责任公司 | Citric acid and its sodium salt co-production system |
-
1931
- 1931-06-19 GB GB17853/31A patent/GB380813A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110407687A (en) * | 2019-08-16 | 2019-11-05 | 上海蓝滨石化设备有限责任公司 | Citric acid and its sodium salt co-production system |
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