The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 07, 2009
Filed:
Feb. 12, 2007
Mamoru Seino, Ichihara, JP;
Mamoru Seino, Ichihara, JP;
Sumitomo Chemical Company, Limited, Tokyo, JP;
Abstract
A process for simultaneously producing a dihydroxybenzene and a diisopropylbenzene dicarbinol, which contains subjecting a diisopropylbenzene with an oxygen containing gas to obtain an oxidation reaction mixture containing a diisopropylbenzene dihydroperoxide and a diisopropylbenzene hydroxy hydroperoxide followed by an extraction separation step, a decomposition step, a distillation separation step, a reduction step and a post-treatment step in this order, the process containing purifying the diisopropylbenzene dicarbinol from the liquid containing the diisopropylbenzene dicarbinol obtained in the reduction step through purification operations containing crystallization, filtration and subsequent drying, and supplying a filtrate obtained by the filtration to the decomposition step and/or distillation separation step.