Method for producing 3,4-dihydroxyphthalic acid
US5523220A · kind A · utility
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5Claims
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Key dates
| Filing date | Mar 21, 1995 |
| Grant date | Jun 4, 1996 |
| Priority date | — |
| Expiry date | Mar 21, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/367
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
There is disclosed a method for producing 3,4-dihydroxyphthalic acid, comprising treating phthalic acid with a product which is obtained by treating the cell membrane fraction of microorganism bacterial bodies capable of converting phthalic acid to 3,4-dihydroxyphthalic acid with a condensate of polyethylene oxide with a higher alcohol, thereby converting the phthalic acid to 3,4-dihydroxyphthalic acid. According to the method, only 3,4-dihydroxyphthalic acid, which is an intermediary metabolite, can be produced efficiently in a process of biodegrading phthalic acid with a microorganism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.