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:
Jul. 10, 2007
Filed:
Jan. 24, 2001
Heinz Auer, Neulussheim, DE;
Bernd Bessling, Grosse Ille, MI (US);
Hans Hammer, Mannheim, DE;
Hans Hasse, Kaiserslautern, DE;
Friedrich Sauer, Obersülzen, DE;
Maximilian Vicari, Limburgerhof, DE;
Gerhard Wagner, Ludwigshafen, DE;
Till Adrian, Bobenheim-Roxheim, DE;
Heinz Auer, Neulussheim, DE;
Bernd Bessling, Grosse Ille, MI (US);
Hans Hammer, Mannheim, DE;
Hans Hasse, Kaiserslautern, DE;
Friedrich Sauer, Obersülzen, DE;
Maximilian Vicari, Limburgerhof, DE;
Gerhard Wagner, Ludwigshafen, DE;
Till Adrian, Bobenheim-Roxheim, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
The invention relates to an apparatus and a process for the preparation of anhydrous or substantially anhydrous formic acid. This apparatus is constructed partly or entirely of substantially zirconium-free materials. The extractant employed is a liquid of the general formula I where the radicals Rand Rare alkyl, cycloalkyl, aryl or aralkyl groups, or Rand Rjointly, together with the N atom, form a heterocyclic 5- or 6-membered ring, and only one of the radicals is an aryl group, and where Ris hydrogen or a C–C-alkyl group. The apparatus has a synthesis reactor (), a hydrolysis reactor (), three distillation devices () and an extraction device ().