Biological removal of dihalocarboxylic acid irritants
US5616498A · kind A · utility
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14Claims
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Key dates
| Filing date | Jul 27, 1995 |
| Grant date | Apr 1, 1997 |
| Priority date | — |
| Expiry date | Jul 27, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC12R2001/01
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Contaminating trace amounts of byproduct dihalocarboxylic acids or salts thereof are removed from aqueous solutions which comprise less than 1,000 ppm of same and at least 20% by weight of amino acids or amino acid derivatives, to render such aqueous solutions nonirritating to biological membranes and suitable for cosmeticology applications, by directly contacting the original aqueous solutions with either (a) about 1 to 100 ppm of a microorganism producing an enzyme specific for the decomposition of said dihalocarboxylic acids or salts thereof, or (b) about 0.1 to 10 ppm of such enzyme, per se.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.