Process for working up organic reaction mixtures
US4277459A · kind A · utility
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3References
5Claims
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Key dates
| Filing date | Feb 13, 1980 |
| Grant date | Jul 7, 1981 |
| Priority date | — |
| Expiry date | Feb 13, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC05B7/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Organic reaction mixtures, particularly of mixtures containing contaminant organic phosphorus compounds and/or sulfur, are worked up by introducing the mixture into water which has been made alkaline and has a temperature of from -10.degree. to +50.degree. C., a pH value of at least 10 being maintained in the resulting mixture, separating the aqueous phase from the sulfur which separates out; and contacting the aqueous phase or the sulfur which has separated out with nitric acid at an elevated temperature and a pH of below 3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.