GB1175492A - Process for the Production of Sodium Trimetaphosphate - Google Patents
Process for the Production of Sodium TrimetaphosphateInfo
- Publication number
- GB1175492A GB1175492A GB720968A GB720968A GB1175492A GB 1175492 A GB1175492 A GB 1175492A GB 720968 A GB720968 A GB 720968A GB 720968 A GB720968 A GB 720968A GB 1175492 A GB1175492 A GB 1175492A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sodium
- temperature
- reaction vessel
- continuously
- sodium trimetaphosphate
- 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
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/38—Condensed phosphates
- C01B25/44—Metaphosphates
- C01B25/445—Metaphosphates of alkali metals
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
Abstract
1,175,492. Sodium trimetaphosphate. FMC CORP. 14 Feb., 1968, No. 7209/68. Heading C1A. Sodium metaphosphate is prepared by continuously feeding an aqueous solution of sodium phosphate(s) (Na2O: P2O5 ratio from 0À99 to 1À00) containing from 70-73% wt. of phos. phate, preferably NaH2PO4, at temperatures which are suitably between 100-110‹ C. through an elongated reaction vessel; feeding combustion gases at a temperature between 800-850‹ C. continuously in a countercurrent fashion through the vessel and removing the calcined product at a temperature of 520- 580‹ C. from the reaction vessel, the total residence time being about three hours, twothirds of which represents the time for complete drying and the remainder the calcination period. The process is suitably carried out in a rotary kiln and provides a product containing less than 0À5% wt. of water insolubles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB720968A GB1175492A (en) | 1968-02-14 | 1968-02-14 | Process for the Production of Sodium Trimetaphosphate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB720968A GB1175492A (en) | 1968-02-14 | 1968-02-14 | Process for the Production of Sodium Trimetaphosphate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1175492A true GB1175492A (en) | 1969-12-23 |
Family
ID=9828726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB720968A Expired GB1175492A (en) | 1968-02-14 | 1968-02-14 | Process for the Production of Sodium Trimetaphosphate |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1175492A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117069083A (en) * | 2023-09-21 | 2023-11-17 | 江苏恒世食品科技有限公司 | Method for producing sodium trimetaphosphate by returning charge polymerization |
| CN117088345A (en) * | 2023-09-21 | 2023-11-21 | 江苏恒世食品科技有限公司 | Method for producing sodium trimetaphosphate by countercurrent polymerization |
-
1968
- 1968-02-14 GB GB720968A patent/GB1175492A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117069083A (en) * | 2023-09-21 | 2023-11-17 | 江苏恒世食品科技有限公司 | Method for producing sodium trimetaphosphate by returning charge polymerization |
| CN117088345A (en) * | 2023-09-21 | 2023-11-21 | 江苏恒世食品科技有限公司 | Method for producing sodium trimetaphosphate by countercurrent polymerization |
| CN117088345B (en) * | 2023-09-21 | 2024-06-04 | 江苏恒世食品科技有限公司 | Method for producing sodium trimetaphosphate by countercurrent polymerization |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |