Compositions comprising hydroquinone and catechol, method for preparing these compositions
AssigneeRhodia Operations
InventorLaurent Garel
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Abstract
The present invention describes compositions comprising at least one compound chosen from hydroquinone and catechol, characterised in that it further comprises between 0.1 and 10,000 ppm of at least one compound chosen from 2-(alkoxy)phenol, 4-(alkoxy)phenol, 2-(alkyl)phenol, 4-(alkyl)phenol, (alkyl)catechol and (alkyl)hydroquinone. Another aspect of this invention concerns a method for preparing a composition comprising at least one compound chosen from hydroquinone and catechol according to the invention, characterised in that it comprises a step (a) of reacting the phenol with hydrogen peroxide in the presence of a catalyst, in a solvent comprising an alcohol.
Claims13
A composition, comprising:
- at least one compound selected from the group consisting of hydroquinone and catechol, and between 0.1 and 10,000 ppm of at least one compound selected from the group consisting of
- 2-(alkoxy)phenols, 4-(alkoxy)phenols, 2-(alkyl)phenols, 4-(alkyl)phenols, (alkyl)catechols, (alkyl)hydroquinones, and alkoxybenzenes, wherein the alkoxy is selected from the group consisting of tert-butoxy 2,2-dimethylpropoxy and isopropoxy and the alkyl is selected from the groups consisting of tert-butyl, 2,2-dimethylpropyl and isopropyl.
Dependencies are inferred from the claim text.