Process for producing stable, low odor S,S,S-tributylphosphorotrithioate
US5189195A · kind A · utility
2Cited by
11References
8Claims
0Family size
Assignee
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Key dates
| Filing date | Jul 30, 1991 |
| Grant date | Feb 23, 1993 |
| Priority date | — |
| Expiry date | Jul 30, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/17
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Stable S,S,S-tributylphosphorotrithioate having reduced levels of the odorous by-product dibutyl disulfide is produced by adding a caustic solution having a concentration of less than 10% to crude S,S,S-tributylphosphorotrithioate until the pH remains constant. In a preferred embodiment, a solution of sodium hydroxide having a concentration of less than 10% is used in an amount such that at least 0.1 mole of sodium hydroxide is present for each mole of crude S,S,S-tributylphosphortrithioate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.