JPS5625192A - Purification of o,o-dialkyl dithiophosphate - Google Patents

Purification of o,o-dialkyl dithiophosphate

Info

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
Application number
JP10071379A
Other languages
Japanese (ja)
Other versions
JPS5839837B2 (en
Inventor
Kennosuke Imamura
Shukichi Nabekawa
Itaru Otsubo
Michinori Hashimoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Chemical Industrial Co Ltd
Original Assignee
Nippon Chemical Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Chemical Industrial Co Ltd filed Critical Nippon Chemical Industrial Co Ltd
Priority to JP10071379A priority Critical patent/JPS5839837B2/en
Publication of JPS5625192A publication Critical patent/JPS5625192A/en
Publication of JPS5839837B2 publication Critical patent/JPS5839837B2/en
Expired legal-status Critical Current

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
JP10071379A 1979-08-09 1979-08-09 Method for purifying 0,0-dialkyldithiophosphoric acid Expired JPS5839837B2 (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (5)

* Cited by examiner, † Cited by third party
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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