JPS5625192A - Purification of o,o-dialkyl dithiophosphate - Google Patents
Purification of o,o-dialkyl dithiophosphateInfo
- Publication number
- JPS5625192A JPS5625192A JP10071379A JP10071379A JPS5625192A JP S5625192 A JPS5625192 A JP S5625192A JP 10071379 A JP10071379 A JP 10071379A JP 10071379 A JP10071379 A JP 10071379A JP S5625192 A JPS5625192 A JP S5625192A
- Authority
- JP
- Japan
- Prior art keywords
- separated
- mineral acid
- dialkyl dithiophosphate
- aqueous layer
- crude
- 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.)
- Granted
Links
Abstract
PURPOSE: To purify the titled compound useful as a raw material for an insecticide or antimicrobial agent safely and simply, by reacting a crude O,O-dialkyl dithiophosphate with an alkali compound in a specific solvent, and regenerating the neutral salt in the aqueous layer with a mineral acid.
CONSTITUTION: A crude O,O-dialkyl dithiophosphate of the formula (R is 1W4C lower alkyl) is reacted with an alkali compound in a solvent consisting of a fractionated component of crude oil having a boiling point of 40W350°C, e.g. petroleum ether, petroleum benzine or gasoline, to form a neutral salt. The aqueous layer is separated from the solvent layer to react the neutral salt in the aqueous layer with a mineral acid, and the titled compound is regenerated and purified. The titled compound is separated from the aqueous solution of the salt of the mineral acid in two layers, allowed to stand and separated. An alkali metal hydroxide, alkaline earth metal hydroxide, etc. may be preferred as the alkali compound.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10071379A JPS5839837B2 (en) | 1979-08-09 | 1979-08-09 | Method for purifying 0,0-dialkyldithiophosphoric acid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10071379A JPS5839837B2 (en) | 1979-08-09 | 1979-08-09 | Method for purifying 0,0-dialkyldithiophosphoric acid |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5625192A true JPS5625192A (en) | 1981-03-10 |
JPS5839837B2 JPS5839837B2 (en) | 1983-09-01 |
Family
ID=14281292
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10071379A Expired JPS5839837B2 (en) | 1979-08-09 | 1979-08-09 | Method for purifying 0,0-dialkyldithiophosphoric acid |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5839837B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009500422A (en) * | 2005-07-06 | 2009-01-08 | ターロ ファーマシューティカルズ ノース アメリカ インコーポレイテッド | Process for the preparation of malathion for pharmaceutical use |
CN108864181A (en) * | 2018-07-26 | 2018-11-23 | 德州绿霸精细化工有限公司 | A kind of method of synthesis O, O- dimethyl disulfide substituted phosphate |
-
1979
- 1979-08-09 JP JP10071379A patent/JPS5839837B2/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009500422A (en) * | 2005-07-06 | 2009-01-08 | ターロ ファーマシューティカルズ ノース アメリカ インコーポレイテッド | Process for the preparation of malathion for pharmaceutical use |
US8536155B2 (en) | 2005-07-06 | 2013-09-17 | Taro Pharmaceuticals North America, Inc. | Process for preparing malathion for pharmaceutical use |
US8957238B2 (en) | 2005-07-06 | 2015-02-17 | Taro Pharmaceuticals North America, Inc. | Process for preparing malathion for pharmaceutical use |
CN108864181A (en) * | 2018-07-26 | 2018-11-23 | 德州绿霸精细化工有限公司 | A kind of method of synthesis O, O- dimethyl disulfide substituted phosphate |
CN108864181B (en) * | 2018-07-26 | 2021-04-13 | 德州绿霸精细化工有限公司 | Method for synthesizing O, O-dimethyl phosphorodithioate |
Also Published As
Publication number | Publication date |
---|---|
JPS5839837B2 (en) | 1983-09-01 |
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