GB1491500A - Method of making alkali metal phosphates from wet-process phosphoric acid - Google Patents
Method of making alkali metal phosphates from wet-process phosphoric acidInfo
- Publication number
- GB1491500A GB1491500A GB47635/74A GB4763574A GB1491500A GB 1491500 A GB1491500 A GB 1491500A GB 47635/74 A GB47635/74 A GB 47635/74A GB 4763574 A GB4763574 A GB 4763574A GB 1491500 A GB1491500 A GB 1491500A
- Authority
- GB
- United Kingdom
- Prior art keywords
- alkali metal
- aqueous phase
- phosphoric acid
- alkali
- metal phosphates
- 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
- C01B25/46—Preparation involving solvent-solvent extraction
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
Abstract
1491500 Alkali metal phosphates USS ENGS & CONSULTANTS Inc 4 Nov 1974 [2 Nov 1973] 47635/74 Heading ClA Alkali metal phosphates are prepared by a method which comprises extracting wet-process phosphoric acid with an organic solvent, selected from n-hexanol, n-heptanol, n-octanol, iso-octanol or mixtures of these, stripping some of the acid from the solvent extract with water, treating the resulting aqueous extract with an alkali-metal base, such as NaOH, Na 2 CO 3 , Na 2 HPO 4 or Na 3 PO 4 and separating the resulting precipitated impurities to leave a first aqueous phase containing alkalimetal phosphate, and stripping further phosphoric acid from the organic solvent extract with aqueous alkali metal base to yield a second aqueous phase containing alkali-metal phosphate which is preferably combined with the first aqueous phase. The ratio of alkali metal to phosphorus in the combined aqueous phase may be adjusted so that an alkalimetal tripolyphosphate is obtained on drying the aqueous phase and calcining the dried product.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US41207773A | 1973-11-02 | 1973-11-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1491500A true GB1491500A (en) | 1977-11-09 |
Family
ID=23631507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB47635/74A Expired GB1491500A (en) | 1973-11-02 | 1974-11-04 | Method of making alkali metal phosphates from wet-process phosphoric acid |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS5083298A (en) |
| FR (1) | FR2249833B1 (en) |
| GB (1) | GB1491500A (en) |
| ZA (1) | ZA746708B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS529088A (en) * | 1975-07-11 | 1977-01-24 | Mitsubishi Chem Ind Ltd | Method for preparing polyolefin |
| US3993733A (en) * | 1975-08-14 | 1976-11-23 | Stauffer Chemical Company | Food grade alkali metal phosphates from wet process H3 PO4 |
| US3993736A (en) * | 1975-08-14 | 1976-11-23 | Stauffer Chemical Company | Food grade phosphoric acid from wet process acid |
| DE19703884C2 (en) * | 1997-02-03 | 1999-04-29 | Bk Giulini Chem Gmbh & Co Ohg | Process for purifying wet process phosphoric acid |
-
1974
- 1974-10-22 ZA ZA00746708A patent/ZA746708B/en unknown
- 1974-11-01 JP JP49127041A patent/JPS5083298A/ja active Pending
- 1974-11-04 FR FR7436631A patent/FR2249833B1/fr not_active Expired
- 1974-11-04 GB GB47635/74A patent/GB1491500A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2249833B1 (en) | 1978-10-27 |
| JPS5083298A (en) | 1975-07-05 |
| FR2249833A1 (en) | 1975-05-30 |
| ZA746708B (en) | 1975-11-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |