JPS57129811A - Manufacture of wet process phosphoric acid - Google Patents
Manufacture of wet process phosphoric acidInfo
- Publication number
- JPS57129811A JPS57129811A JP1018181A JP1018181A JPS57129811A JP S57129811 A JPS57129811 A JP S57129811A JP 1018181 A JP1018181 A JP 1018181A JP 1018181 A JP1018181 A JP 1018181A JP S57129811 A JPS57129811 A JP S57129811A
- Authority
- JP
- Japan
- Prior art keywords
- gypsum
- bentonite
- phosphoric acid
- dihydrate
- hemihydrate
- 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.)
- Pending
Links
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
PURPOSE: To enhance the filterability of by-product gypsum by adding bentonite to a decomposition reaction system in the manufacture of wet process phosphoric acid by a dihydrate-hemihydrate method.
CONSTITUTION: A required amount of bentonite is fed to a decomposition reaction system where phosphate ore is decomposed with sulfuric acid in a decomposition vessel to produce gypsum dihydrate and phosphoric acid. This bentonite reacts with fluorine in the ore and inhibits the formation of hydrofluoric acid as a factor hindering the growth of gypsum crystals. A slurry prepared in the decomposition vessel is separated into product wet process phosphoric acid and gypsum dihydrate contg. P, and org. matter adsorbed bentonite is shiffted to the gypsum side. This bentonite-contg. gypsum is brought into contact with acid in the presence of seed crystals of hemihydrate gypsum in a modifying vessel to convert the gypsum dihydrate into hemihydrate gypsum. The resulting slurry is filtered, and the filtrate is circulated to the decomposition vessel together with a washing soln. used to wash the residual hemihydrate gypsum.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1018181A JPS57129811A (en) | 1981-01-28 | 1981-01-28 | Manufacture of wet process phosphoric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1018181A JPS57129811A (en) | 1981-01-28 | 1981-01-28 | Manufacture of wet process phosphoric acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57129811A true JPS57129811A (en) | 1982-08-12 |
Family
ID=11743113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1018181A Pending JPS57129811A (en) | 1981-01-28 | 1981-01-28 | Manufacture of wet process phosphoric acid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57129811A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002020400A1 (en) * | 2000-09-01 | 2002-03-14 | Shandong Lubei Enterprise Group Company | A method of preparing wet process phosphoric acid |
| JP2013512837A (en) * | 2009-12-02 | 2013-04-18 | プレイヨン テクノロジーズ | Method for producing phosphoric acid |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4839156A (en) * | 1971-09-22 | 1973-06-08 |
-
1981
- 1981-01-28 JP JP1018181A patent/JPS57129811A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4839156A (en) * | 1971-09-22 | 1973-06-08 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002020400A1 (en) * | 2000-09-01 | 2002-03-14 | Shandong Lubei Enterprise Group Company | A method of preparing wet process phosphoric acid |
| US7172742B2 (en) | 2000-09-01 | 2007-02-06 | Shandong Lubei Enterprise Group Company | Method of preparing wet process phosphoric acid |
| JP2013512837A (en) * | 2009-12-02 | 2013-04-18 | プレイヨン テクノロジーズ | Method for producing phosphoric acid |
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