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:
May. 14, 2002
Filed:
Jul. 09, 2001
Applicant:
Inventors:
Elke Schweers, Bad Soden, DE;
Thomas Kaiser, Kelkheim, DE;
Michael Haubs, Bad Kreuznach, DE;
Michael Rosenberg, Niedernhausen, DE;
Assignee:
Ticona GmbH, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; C07C 4/500 ;
U.S. Cl.
CPC ...
C07D / ; C07C 4/500 ;
Abstract
Processes for making trioxane, polyoxymethylene and polyoxymethylene copolymers from formaldehyde, made by the dehydrogenation of methanol in the presence of a catalytic active species set free from a sodium compound, at a temperature in the range of 300° C. to 1000° C., wherein a carrier gas stream which has a temperature above the dehydrogenation temperature is fed to the reactor.