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. 24, 2007
Filed:
Jan. 12, 2005
Christian Werner, Hannover, DE;
Andreas Kanschik-conradsen, Garbsen, DE;
Bernd Kellermeier, Lindhorst, DE;
Hans-jürgen Schmidt, Seelze-Lohnde, DE;
Christian Werner, Hannover, DE;
Andreas Kanschik-Conradsen, Garbsen, DE;
Bernd Kellermeier, Lindhorst, DE;
Hans-Jürgen Schmidt, Seelze-Lohnde, DE;
Honeywell International Inc., Morristown, NJ (US);
Abstract
An improved process and catalyst system for the isomerization of halothiophenes. More particularly, an improved process for the isomerization of 2-halothiopehenes to 3-halothiophenes by reacting a 2-halothiophene with a catalyst and in the presence of a base. The addition of a base additive to the acidic zeolite catalyst allows the desired isomerization reaction to take place while suppressing side-reactions that result in the decomposition of thiophene rings. The catalyst lifetime is thus increased and the amount of catalyst needed for the reaction is reduced, lowering cost.