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:
Mar. 02, 2010
Filed:
Dec. 04, 2003
Sigurd Buchholz, Köln, DE;
Alexander Klausener, Pulheim, DE;
Reinhard Langer, Tönisvorst, DE;
Leslaw Mleczko, Dormagen, DE;
Günter Rauchschwalbe, Leverkusen, DE;
Sigurd Buchholz, Köln, DE;
Alexander Klausener, Pulheim, DE;
Reinhard Langer, Tönisvorst, DE;
Leslaw Mleczko, Dormagen, DE;
Günter Rauchschwalbe, Leverkusen, DE;
LANXESS Deutschland GmbH, Leverkusen, DE;
Abstract
The invention relates to a method for the thermal decarboxylation of dicarboxylic acids, in particular to 3,4-ethylene dioxythiophene-2,5-dicarboxylic acid as an educt. According to said method the educt is used in solid form and/or the reaction is carried out in the presence of a plurality of fluidised bed bodies. No solvents are used in the reaction and the decarboxylation product that is formed during the reaction is carried away from the reaction zone in gaseous form.