RU95103421A - Method of producing anhydrous phosphorous acid - Google Patents
Method of producing anhydrous phosphorous acidInfo
- Publication number
- RU95103421A RU95103421A RU95103421/25A RU95103421A RU95103421A RU 95103421 A RU95103421 A RU 95103421A RU 95103421/25 A RU95103421/25 A RU 95103421/25A RU 95103421 A RU95103421 A RU 95103421A RU 95103421 A RU95103421 A RU 95103421A
- Authority
- RU
- Russia
- Prior art keywords
- phosphorous acid
- yield
- temperature
- reaction
- reaction mixture
- Prior art date
Links
Abstract
FIELD: production of inorganic substances. SUBSTANCE: anhydrous phosphorous acid is produced via hydrolysis of phosphorus trichloride in presence of phosphorous acid. The two substances and water are taken in molar ratio 1: n: 3, respectively, where n is more or equal to zero and, preferably, is ranged from 0.05 to 1. Process is performed by contacting reactants at temperature from 0 to 80 C and is terminated in presence of organic solvent, advantageously with boiling temperature below melting temperature of phosphorous acid. Reaction mixture is boiled until hydrochloric acid is completely removed. Phosphorous acid begins crystallizing yet in the course of reaction and is isolated by decanting solvent and blowing through with inert gas after reaction mixture is cooled to ambient temperature. Melting point of product 73-74 C, yield 96-98%. EFFECT: improved purity and yield of product.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU95103421/25A RU95103421A (en) | 1995-03-10 | 1995-03-10 | Method of producing anhydrous phosphorous acid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU95103421/25A RU95103421A (en) | 1995-03-10 | 1995-03-10 | Method of producing anhydrous phosphorous acid |
Publications (1)
Publication Number | Publication Date |
---|---|
RU95103421A true RU95103421A (en) | 1997-05-10 |
Family
ID=48433020
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
RU95103421/25A RU95103421A (en) | 1995-03-10 | 1995-03-10 | Method of producing anhydrous phosphorous acid |
Country Status (1)
Country | Link |
---|---|
RU (1) | RU95103421A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2528053C2 (en) * | 2009-05-28 | 2014-09-10 | Страйтмарк Холдинг Аг | Method of obtaining dialkylphosphites |
-
1995
- 1995-03-10 RU RU95103421/25A patent/RU95103421A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2528053C2 (en) * | 2009-05-28 | 2014-09-10 | Страйтмарк Холдинг Аг | Method of obtaining dialkylphosphites |
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