GB470428A - Improvements in the manufacture and production of concentrated phosphoric acid - Google Patents
Improvements in the manufacture and production of concentrated phosphoric acidInfo
- Publication number
- GB470428A GB470428A GB479736A GB479736A GB470428A GB 470428 A GB470428 A GB 470428A GB 479736 A GB479736 A GB 479736A GB 479736 A GB479736 A GB 479736A GB 470428 A GB470428 A GB 470428A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sulphuric acid
- phosphate
- calcium sulphate
- phosphoric acid
- concentrated phosphoric
- 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
- C01B25/18—Phosphoric acid
- C01B25/22—Preparation by reacting phosphate-containing material with an acid, e.g. wet process
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
Concentrated phosphoric acid is obtained by reacting rock phosphate with sulphuric acid of more than 50 per cent strength in an amount which is more than double the amount which is stoichiometrically equivalent to the lime content of the crude phosphate, separating the calcium sulphate formed from the liquid, and adding further amounts of crude phosphate to the liquid to convert the remaining sulphuric acid into calcium sulphate, a temperature of at least 80 DEG C. being maintained in the single stages of the decomposition. The rock phosphate may be added in several successive batches (say five) with the intervening removal of calcium sulphate. In the latter modification further sulphuric acid may be added to decompose the last batch of rock phosphate. Preferably 70 per cent sulphuric acid is employed at a temperature of 90--100 DEG C.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB479736A GB470428A (en) | 1936-02-17 | 1936-02-17 | Improvements in the manufacture and production of concentrated phosphoric acid |
| FR814760D FR814760A (en) | 1936-02-17 | 1936-12-10 | Process for preparing concentrated phosphoric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB479736A GB470428A (en) | 1936-02-17 | 1936-02-17 | Improvements in the manufacture and production of concentrated phosphoric acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB470428A true GB470428A (en) | 1937-08-16 |
Family
ID=9783964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB479736A Expired GB470428A (en) | 1936-02-17 | 1936-02-17 | Improvements in the manufacture and production of concentrated phosphoric acid |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR814760A (en) |
| GB (1) | GB470428A (en) |
-
1936
- 1936-02-17 GB GB479736A patent/GB470428A/en not_active Expired
- 1936-12-10 FR FR814760D patent/FR814760A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR814760A (en) | 1937-06-29 |
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