GB782177A - Dicalcium phosphate - Google Patents
Dicalcium phosphateInfo
- Publication number
- GB782177A GB782177A GB2608354A GB2608354A GB782177A GB 782177 A GB782177 A GB 782177A GB 2608354 A GB2608354 A GB 2608354A GB 2608354 A GB2608354 A GB 2608354A GB 782177 A GB782177 A GB 782177A
- Authority
- GB
- United Kingdom
- Prior art keywords
- dicalcium phosphate
- acid
- neutralizing
- precipitate
- fluoride
- 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
- C01B25/32—Phosphates of magnesium, calcium, strontium, or barium
- C01B25/322—Preparation by neutralisation of orthophosphoric acid
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Materials For Medical Uses (AREA)
- Paper (AREA)
- Removal Of Specific Substances (AREA)
Abstract
Fluoride is removed in the preparation of dicalcium phosphate from wet process phosphoric acid by neutralizing the acid with an alkaline compound of calcium, e.g. lime or calcium carbonate, to a pH range 2.9-3.1; removing the precipitate, which is mainly fluoride; and then neutralizing the residual acid to precipitate dicalcium phosphate.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2608354A GB782177A (en) | 1954-09-09 | 1954-09-09 | Dicalcium phosphate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2608354A GB782177A (en) | 1954-09-09 | 1954-09-09 | Dicalcium phosphate |
Publications (1)
Publication Number | Publication Date |
---|---|
GB782177A true GB782177A (en) | 1957-09-04 |
Family
ID=10238083
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2608354A Expired GB782177A (en) | 1954-09-09 | 1954-09-09 | Dicalcium phosphate |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB782177A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3294486A (en) * | 1963-09-16 | 1966-12-27 | Knapsack Ag | Manufacture of dicalcium phosphate, dihydrate |
US3391992A (en) * | 1964-06-04 | 1968-07-09 | Swift & Co | Feed grade dicalcium phosphate |
US4755367A (en) * | 1985-05-02 | 1988-07-05 | Benckiser-Knapsack Gmbh | Process for the preparation of coarse-particle dicalcium phosphate dihydrate |
-
1954
- 1954-09-09 GB GB2608354A patent/GB782177A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3294486A (en) * | 1963-09-16 | 1966-12-27 | Knapsack Ag | Manufacture of dicalcium phosphate, dihydrate |
US3391992A (en) * | 1964-06-04 | 1968-07-09 | Swift & Co | Feed grade dicalcium phosphate |
US4755367A (en) * | 1985-05-02 | 1988-07-05 | Benckiser-Knapsack Gmbh | Process for the preparation of coarse-particle dicalcium phosphate dihydrate |
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