GB1229527A - - Google Patents
Info
- Publication number
- GB1229527A GB1229527A GB1229527DA GB1229527A GB 1229527 A GB1229527 A GB 1229527A GB 1229527D A GB1229527D A GB 1229527DA GB 1229527 A GB1229527 A GB 1229527A
- Authority
- GB
- United Kingdom
- Prior art keywords
- anhydride
- mols
- citric
- division
- acetic
- 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
- C07C59/00—Compounds having carboxyl groups bound to acyclic carbon atoms and containing any of the groups OH, O—metal, —CHO, keto, ether, groups, groups, or groups
- C07C59/235—Saturated compounds containing more than one carboxyl group
- C07C59/245—Saturated compounds containing more than one carboxyl group containing hydroxy or O-metal groups
- C07C59/265—Citric acid
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
1,229,527. Citric anhydride. WARNERLAMBERT PHARMACEUTICAL CO. 17 Nov., 1969 [12 Dec., 1968], No. 56080/69. Heading C2C. [Also in Division A5] The invention comprises crystalline citric anhydride of the formula The anhydride is obtainable by treating anhydrous citric acid with 1-2 mols. of acetic acid and 2 mols, of acetic anhydride at a temperature not above 100‹ C., preferably at 35- 50‹ C. An example is given. The product is used with an alkali metal bicarbonate to form an effervescent couple in drug formulations (see Division A5).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US78343168A | 1968-12-12 | 1968-12-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1229527A true GB1229527A (en) | 1971-04-21 |
Family
ID=25129225
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1229527D Expired GB1229527A (en) | 1968-12-12 | 1969-11-17 |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE1961527A1 (en) |
ES (1) | ES374394A1 (en) |
FR (1) | FR2025932A1 (en) |
GB (1) | GB1229527A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0702043A3 (en) * | 1994-08-22 | 1998-01-07 | Basf Aktiengesellschaft | Process for the preparation of polycondensates of citric acid and their use in detergents and cleaning agents |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1939219A1 (en) * | 2006-12-29 | 2008-07-02 | Sigea S.R.L. | Polysaccharides derivatised with citric acid |
-
1969
- 1969-11-17 GB GB1229527D patent/GB1229527A/en not_active Expired
- 1969-11-21 FR FR6940064A patent/FR2025932A1/fr not_active Withdrawn
- 1969-12-08 DE DE19691961527 patent/DE1961527A1/en active Pending
- 1969-12-10 ES ES69374394A patent/ES374394A1/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0702043A3 (en) * | 1994-08-22 | 1998-01-07 | Basf Aktiengesellschaft | Process for the preparation of polycondensates of citric acid and their use in detergents and cleaning agents |
Also Published As
Publication number | Publication date |
---|---|
FR2025932A1 (en) | 1970-09-11 |
ES374394A1 (en) | 1972-04-01 |
DE1961527A1 (en) | 1970-06-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |