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:
Nov. 18, 2014
Filed:
Dec. 20, 2012
Basf SE, Ludwigshafen, DE;
Peter Bassler, Viernheim, DE;
Stefan Rittinger, Mannheim, DE;
Daniel Schneider, Mannheim, DE;
Donata Maria Fries, Mannheim, DE;
Klaus-Dieter Mohl, Hockenheim, DE;
Joaquim Henrique Teles, Waldsee, DE;
Martin Schäfer, Grünstadt, DE;
Jürgen Paschold, Hochspeyer, DE;
BASF SE, Ludwigshafen, DE;
Abstract
Process for obtaining formic acid by thermal separation of a stream comprising formic acid and a tertiary amine (I), in which a liquid stream comprising formic acid and tertiary amine (I) is produced by combining tertiary amine (I) and a formic acid source, secondary components comprised therein are separated off, formic acid is removed by distillation from the resulting liquid stream in a distillation apparatus, where the bottom output from the distillation apparatus is separated into two liquid phases, and the upper liquid phase is recirculated to the formic acid source and the lower liquid phase is recirculated to the separation of the secondary components and/or to the distillation apparatus, wherein low boilers are removed by distillation from the upper liquid phase and recirculated to the depleted stream.