JPS5688814A - Purifying agent for wet preparation process of phosphoric acid - Google Patents
Purifying agent for wet preparation process of phosphoric acidInfo
- Publication number
- JPS5688814A JPS5688814A JP16564679A JP16564679A JPS5688814A JP S5688814 A JPS5688814 A JP S5688814A JP 16564679 A JP16564679 A JP 16564679A JP 16564679 A JP16564679 A JP 16564679A JP S5688814 A JPS5688814 A JP S5688814A
- Authority
- JP
- Japan
- Prior art keywords
- phosphoric acid
- purifying agent
- preparation process
- acid
- wet preparation
- 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
Abstract
PURPOSE: The titled agent containing a water-soluble high polymer havng specific structural units, capable of giving high-purity phosphoric acid by adding a small amount thereof to the wet preparation process.
CONSTITUTION: A purifying agent for the wet preparation process of phosphoric acid consisting of water-soluble high polymer having a molecular weight of 1,000,000 to 15,000,000 obtained by (co)polymerizing 5% or more monomer having a structural unit of the formula (R1 is H or lower alkyl; R2 is lower alkylene; R3 and R4 are lower alkyl; R5 is benzyl; X is electro-negative group) with a polymerizable monomer, e.g. acrylamide or acrylic acid. In purifyting phosphoric acid with the purifying agent thus obtaned, a phosphate rock is decomposed with sulfuric acid or a mixed acid of the sulfuric acid with phosphoric acid, and the formed hemihydrate gypsum is converted into gypsum dihydrate. 10W40ppm the purifying agent is then added to aggregate the gypsum and other impurities into a floc. The resultant floc is separated by the filtration to give high-purity phosphoric acid.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16564679A JPS5688814A (en) | 1979-12-21 | 1979-12-21 | Purifying agent for wet preparation process of phosphoric acid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16564679A JPS5688814A (en) | 1979-12-21 | 1979-12-21 | Purifying agent for wet preparation process of phosphoric acid |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5688814A true JPS5688814A (en) | 1981-07-18 |
Family
ID=15816311
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16564679A Pending JPS5688814A (en) | 1979-12-21 | 1979-12-21 | Purifying agent for wet preparation process of phosphoric acid |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5688814A (en) |
-
1979
- 1979-12-21 JP JP16564679A patent/JPS5688814A/en active Pending
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