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. 18, 1978
Filed:
Aug. 23, 1976
Applicant:
Inventors:
Mikio Sato, Chiba, JP;
Kinya Tawara, Sohka, JP;
Shinpachiro Iwaki, Kobe, JP;
Kohji Matsumoto, Saitama, JP;
Kenichi Sekine, Kuki, JP;
Assignee:
Maruzen Oil Co., Ltd., Osaka, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
568750 ; 568756 ;
Abstract
A process for the separation and purification of vinylphenol which comprises contacting crude vinylphenol containing vinylphenol and impurities such as phenol, alkylphenols, vinylphenol polymers and hydrocarbons countercurrently with an aqueous alkali solution together with a specific organic solvent. Vinylphenol obtained is useful as the raw material for the production of polyvinylphenol or a vinylphenol copolymer which is utilized as a thermoplastic resin, an ion exchange membrane, an adhesive, a glass fiber-reinforced composite or the like.