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:
Feb. 20, 1979
Filed:
Jan. 26, 1978
Applicant:
Inventor:
Yasuo Tanabe, Tokyo, JP;
Assignee:
Mitsubishi Chemical Industries Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
26034611 ;
Abstract
This invention relates to an improved process for producing cyclic ether from an acetic acid ester of 1,4-glycol and water by cyclization reaction which is characterized by solidifying a high boiling by-product with or without a separation accelerator in the reaction residue, separating the solid obtained thereby from the residue of filtration and recycling a filtrate into the reaction zone.