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:
Jan. 06, 1994
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, , US;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
549368 ;
Abstract
In a process for the preparation of trioxane from formaldehyde in the gas phase in the presence of a catalyst, the catalyst employed is 11-molybdo-1-vanadophosphoric acid, H.sub.4 PVMo.sub.11 O.sub.40 .multidot.n H.sub.2 O (n=0-32). Advantages of this process are, inter alia, high space-time yields and the suppression of byproducts.