Process for manufacturing diazinon
US4898942A · kind A · utility
2Cited by
9References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 30, 1988 |
| Grant date | Feb 6, 1990 |
| Priority date | — |
| Expiry date | Aug 30, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/6512
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
An improved process for the production of Diazinon substantially free of toxic by-products in high yield and very high purity which involves mixing 2-isopropyl-4-methyl-6-hydroxypyrimidine with solid sodium or potassium hydroxide in a ketone or ether solvent at a temperature of about 50.degree.-60.degree. C. until a homogeneous mixture is formed, adding diethylthiophosphoryl chloride to the homogeneous mixture, keeping the mixture at a temperature of 55.degree.-80.degree. C. until the reaction is complete, and separating the Diazinon formed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.