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. 16, 1996
Filed:
Dec. 30, 1993
Applicant:
Inventors:
Gerhard Emig, Erlangen, DE;
Benno Kruger, Waldems-Esch, DE;
Frank Kern, Kandel, DE;
Michael Hoffmockel, Niedernhausen, DE;
Karl-Friedrich Muck, Wiesbaden, DE;
Gunter Sextro, Wiesbaden, DE;
Assignee:
Hoechst Aktiengesellschaft, , DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
549368 ;
Abstract
A process for the catalytic preparation of trioxane from formaldehyde in the gas phase employs a catalyst comprising vanadyl hydrogenphosphate hemihydrate which may be unactivated or activated by steam. No byproducts were obtained in the process and the space-time yield is high. Deposits in the reactor do not occur.