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:
Sep. 19, 2000
Filed:
May. 13, 1998
Applicant:
Inventors:
Assignee:
Sumitomo Chemical Company, Limited, Okaka-fu, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
203 74 ; 203 81 ; 568749 ; 568750 ; 568913 ;
Abstract
A method is provided for industrially advantageously and effectively separating 4M2B and 3M6B from a t-butylcresol mixture containing 2-t-butyl-4-methylphenol (4M2B), 2-tbutyl-5-methylphenol (3M6B), compounds having a lower boiling point than that of 4M2B and compounds having a higher boiling point than that of 3M6B derived from a m,p-cresol mixture.