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:
Apr. 14, 1981
Filed:
Dec. 10, 1979
Applicant:
Inventors:
Juergen Hartig, Gruenstadt, DE;
Hans-Martin Weitz, Bad Durkheim, DE;
Assignee:
BASF Aktiengesellschaft, , DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
26034611 ;
Abstract
A process for the preparation of tetrahydrofuran by heating a carboxylic acid diester of butane-1,4-diol in the gas phase at above about 160.degree. C. in the presence of an aluminum oxide catalyst which is obtained by drying, at 70.degree.-120.degree. C., an aluminum hydroxide gel which has been precipitated from an aqueous aluminum sulfate solution by means of a basic agent.