Elimination of sulfide odor in thiocarbamate herbicides
US5192498A · kind A · utility
12Cited by
5References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 11, 1991 |
| Grant date | Mar 9, 1993 |
| Priority date | — |
| Expiry date | Oct 11, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01N47/18
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
It has now been discovered that the undesirable odor in thiocarbamate compounds can be suppressed or mostly eliminated by the process of this invention. Generally, the process of this invention involves mixing an aqueous solution of sodium hypochlorite, calcium hypochlorite or chloramine-B with the odorous thiocarbamate compound for a sufficient period of time, followed by a second step of mixing citric acid, maleic acid or oxalic acid with the treated thiocarbamate compound to eliminate chlorodialkylamine compounds produced in the first step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.