GB1102382A - Improvements in the manufacture of alkali metal phosphates - Google Patents
Improvements in the manufacture of alkali metal phosphatesInfo
- Publication number
- GB1102382A GB1102382A GB2344867A GB2344867A GB1102382A GB 1102382 A GB1102382 A GB 1102382A GB 2344867 A GB2344867 A GB 2344867A GB 2344867 A GB2344867 A GB 2344867A GB 1102382 A GB1102382 A GB 1102382A
- Authority
- GB
- United Kingdom
- Prior art keywords
- alkali metal
- acid
- manufacture
- na2sif6
- 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
- C01B25/26—Phosphates
- C01B25/30—Alkali metal phosphates
- C01B25/301—Preparation from liquid orthophosphoric acid or from an acid solution or suspension of orthophosphates
- C01B25/303—Preparation from liquid orthophosphoric acid or from an acid solution or suspension of orthophosphates with elimination of impurities
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Silicon Compounds (AREA)
Abstract
Fluorine present as fluosilicic acid in wet process H3PO4 is removed by adding a sodium salt to precipitate Na2SiF6, the reaction being carried out in the presence of at least 5% by weight of the reaction mixture of Na2SiF6 previously added to the liquor. The salt may be Na2CO3, NaCl, Na2SO4 or sodium phosphate. The reactants' residence time is preferably not less than 1/2 hr. Silica or a silicate can be added to the acid to convert any fluorine present to H2SiF6. The treated acid is neutralized with alkali to produce alkali metal phosphate(s).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2523164A GB1102381A (en) | 1964-06-18 | 1964-06-18 | Improvements in the manufacture of alkali metal phosphates |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1102382A true GB1102382A (en) | 1968-02-07 |
Family
ID=10224327
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2523164A Expired GB1102381A (en) | 1964-06-18 | 1964-06-18 | Improvements in the manufacture of alkali metal phosphates |
| GB2344867A Expired GB1102382A (en) | 1964-06-18 | 1964-06-18 | Improvements in the manufacture of alkali metal phosphates |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2523164A Expired GB1102381A (en) | 1964-06-18 | 1964-06-18 | Improvements in the manufacture of alkali metal phosphates |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE665512A (en) |
| GB (2) | GB1102381A (en) |
| NL (2) | NL6507895A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2528896C2 (en) * | 1975-06-28 | 1984-07-12 | Hoechst Ag, 6230 Frankfurt | Process for the preparation of a low-vanadium alkali metal phosphate solution |
-
1964
- 1964-06-18 GB GB2523164A patent/GB1102381A/en not_active Expired
- 1964-06-18 GB GB2344867A patent/GB1102382A/en not_active Expired
-
1965
- 1965-06-16 BE BE665512D patent/BE665512A/xx unknown
- 1965-06-18 NL NL6507895A patent/NL6507895A/xx unknown
-
1969
- 1969-06-04 NL NL6908502A patent/NL6908502A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BE665512A (en) | 1965-10-18 |
| NL6908502A (en) | 1969-08-25 |
| GB1102381A (en) | 1968-02-07 |
| NL6507895A (en) | 1965-12-20 |
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