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:
Jan. 11, 2005
Filed:
Jan. 12, 2001
Heinz Auer, Neulussheim, DE;
Bernd Bessling, Grosse Ille, DE;
Hans Hammer, Mannheim, DE;
Hans Hasse, Kaiserslautern, DE;
Friedrich Sauer, Obersülzen, DE;
Maximilian Vicari, Limburgerhof, DE;
Till Adrian, Bobenheim-Roxheim, DE;
Heinz Auer, Neulussheim, DE;
Bernd Bessling, Grosse Ille, DE;
Hans Hammer, Mannheim, DE;
Hans Hasse, Kaiserslautern, DE;
Friedrich Sauer, Obersülzen, DE;
Maximilian Vicari, Limburgerhof, DE;
Till Adrian, Bobenheim-Roxheim, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
The invention relates to a process for obtaining anhydrous or substantially anhydrous formic acid, in which firstly aqueous formic acid is produced by hydrolysis of methyl formate, with the methanol content in the methyl formate having been reduced in advance. The process according to the invention has the special feature that—before the hydrolysis of the methyl formate—the methanol content of the methanol-containing methyl formate is reduced in a distillation column, this distillation column simultaneously being employed for other separation functions during work-up of the formic acid.