Process for producing tri-N-butylphosphorotrithioite
US5183916A · kind A · utility
2Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 14, 1989 |
| Grant date | Feb 2, 1993 |
| Priority date | — |
| Expiry date | Apr 14, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/142
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Tri-n-butylphosphorothioite is produced on a continuous or semi-continuous by simultaneously adding phosphorus trichloride and butylmercaptan to a reaction vessel at a rate such that an excess of butylmercaptan is present and allowing the resultant mixture to react at a temperature of from about 120.degree. C. to about 150.degree. C. One or more reactors may be employed. This process is particularly advantageous for safety reasons and produces high quality phosphite which may be oxidized without purification to produce S,S,S-tri-n-butylphosphorotrithioate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.