GB1087542A - Improvements in the manufacture of phosphoric acid - Google Patents
Improvements in the manufacture of phosphoric acidInfo
- Publication number
- GB1087542A GB1087542A GB1733564A GB1733564A GB1087542A GB 1087542 A GB1087542 A GB 1087542A GB 1733564 A GB1733564 A GB 1733564A GB 1733564 A GB1733564 A GB 1733564A GB 1087542 A GB1087542 A GB 1087542A
- Authority
- GB
- United Kingdom
- Prior art keywords
- vessel
- phosphate rock
- h2so4
- added
- cascade
- 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
- C01B25/222—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen
- C01B25/223—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen only one form of calcium sulfate being formed
- C01B25/225—Dihydrate process
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
H3PO4 is prepared by reacting phosphate rock with H2SO4 in a cascade of vessels, recycling the major part of the product and mixing it with the phosphate rock in the first vessel of the cascade, and introducing the major part of the H2SO4 into the second vessel and the remainder into the first. The non-recycled part of the product may have phosphate rock added thereto, and may then be filtered and the cake washed with H2O and/or dilute H3PO4 which may be recycled to the first vessel. The filtrate, to which may be added pre-formed gypsum crystals, may be matured, at a temperature below that of the reaction, while being agitated, e.g. by blowing air therethrough. The proportion of H2SO4 in the first vessel may be 0.5-4% by wt. Sand or other siliceous material may be added to the phosphate rock or to the first vessel.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1733564A GB1087542A (en) | 1964-04-27 | 1964-04-27 | Improvements in the manufacture of phosphoric acid |
| BE663016D BE663016A (en) | 1964-04-27 | 1965-04-26 | |
| FR14681A FR1430814A (en) | 1964-04-27 | 1965-04-26 | Wet process for manufacturing phosphoric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1733564A GB1087542A (en) | 1964-04-27 | 1964-04-27 | Improvements in the manufacture of phosphoric acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1087542A true GB1087542A (en) | 1967-10-18 |
Family
ID=10093370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1733564A Expired GB1087542A (en) | 1964-04-27 | 1964-04-27 | Improvements in the manufacture of phosphoric acid |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE663016A (en) |
| GB (1) | GB1087542A (en) |
-
1964
- 1964-04-27 GB GB1733564A patent/GB1087542A/en not_active Expired
-
1965
- 1965-04-26 BE BE663016D patent/BE663016A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BE663016A (en) | 1965-08-17 |
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