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:
Dec. 07, 1999
Filed:
Jul. 05, 1996
Naoto Yasaka, Chiba, JP;
Tatsuo Shirahata, Chiba, JP;
Mitsui Chemicals, Inc., Tokyo, JP;
Abstract
The improved process for producing phenol, acetone and .alpha.-methylstyrene in the cumene-phenol process comprising cumene hydroperoxide, cumene and dimethylphenylcarbinol in the presence of sulfuric acid has the steps of decomposing the cumene hydroperoxide in a back mixing reactor with the yield of .alpha.-methylstyrene as produced from dimethylphenylcarbinol being controlled and the step of forming .alpha.-methylstyrene in such a way that the reaction mixture produced in the first step is supplied into a plug-flow reactor after acetone is added to said reaction mixture. The process is capable of consistent production of phenol and .alpha.-methylstyrene in high yields under mild reaction conditions.