GB1373002A - Process for the manufacture of zinc citrate - Google Patents
Process for the manufacture of zinc citrateInfo
- Publication number
- GB1373002A GB1373002A GB336271A GB336271A GB1373002A GB 1373002 A GB1373002 A GB 1373002A GB 336271 A GB336271 A GB 336271A GB 336271 A GB336271 A GB 336271A GB 1373002 A GB1373002 A GB 1373002A
- Authority
- GB
- United Kingdom
- Prior art keywords
- zinc citrate
- jan
- conditions
- particles
- particle size
- 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
- C07C51/41—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
Abstract
1373002 Zinc citrate UNILEVER Ltd 25 Jan 1972 [28 Jan 1971] 3362/71 Heading C2C Finely divided zinc citrate is produced by reacting ZnO, preferably at below 45‹ C., with an aqueous solution of at least a stoichiometric amount of citric acid under conditions of acid concentration and of such vigorous agitation that the particles of zinc citrate precipitated have an average particle size on a weight basis of less than 50 Á, separating and washing the zinc citrate with water to remove any citric acid present, removing water from the zinc citrate physically, without change of state, e.g. centrifugally, to such an extent that after the subsequent drying stage the zinc citrate still has an average particle size of less than 50 Á, and drying the zinc citrate at elevated temperature under dynamic conditions, i.e. conditions under which there is relative movement between the particles and air, e.g. in a fluidized bed or in a vacuum oven through which a flow of air is maintained. The products, obtained in the dihydrate form in the examples, may be used in tooth pastes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB336271A GB1373002A (en) | 1972-01-25 | 1972-01-25 | Process for the manufacture of zinc citrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB336271A GB1373002A (en) | 1972-01-25 | 1972-01-25 | Process for the manufacture of zinc citrate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1373002A true GB1373002A (en) | 1974-11-06 |
Family
ID=9756877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB336271A Expired GB1373002A (en) | 1972-01-25 | 1972-01-25 | Process for the manufacture of zinc citrate |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1373002A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102417446A (en) * | 2011-10-31 | 2012-04-18 | 广西亿康药业股份有限公司 | Production method for zinc undecylenate |
| WO2016064412A1 (en) * | 2014-10-24 | 2016-04-28 | Colgate-Palmolive Company | Preparation of zinc citrate and of zinc citrate-containing oral care compositions |
| CN106748732A (en) * | 2016-12-20 | 2017-05-31 | 湖北大学 | A kind of preparation method of zinc citrate ammonium |
-
1972
- 1972-01-25 GB GB336271A patent/GB1373002A/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102417446A (en) * | 2011-10-31 | 2012-04-18 | 广西亿康药业股份有限公司 | Production method for zinc undecylenate |
| WO2016064412A1 (en) * | 2014-10-24 | 2016-04-28 | Colgate-Palmolive Company | Preparation of zinc citrate and of zinc citrate-containing oral care compositions |
| CN107072894A (en) * | 2014-10-24 | 2017-08-18 | 高露洁-棕榄公司 | The preparation of zinc citrate and oral care composition containing zinc citrate |
| AU2014409614B2 (en) * | 2014-10-24 | 2018-03-15 | Colgate-Palmolive Company | Preparation of zinc citrate and of zinc citrate-containing oral care compositions |
| US11234913B2 (en) | 2014-10-24 | 2022-02-01 | Colgate-Palmolive Company | Preparation of zinc citrate and of zinc citrate-containing oral care compositions |
| CN106748732A (en) * | 2016-12-20 | 2017-05-31 | 湖北大学 | A kind of preparation method of zinc citrate ammonium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PE20 | Patent expired after termination of 20 years |