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:
Dec. 02, 2014
Filed:
Jun. 29, 2011
Daniel Schneider, Mannheim, DE;
Klaus-dieter Mohl, Hockenheim, DE;
Martin Schäfer, Grünstadt, DE;
Karin Pickenäcker, Lampertheim, DE;
Stefan Rittinger, Mannheim, DE;
Thomas Schaub, Neustadt, DE;
Joaquim Henrique Teles, Otterstadt, DE;
Rocco Paciello, Bad Dürkheim, DE;
Gerd Kaibel, Lampertheim, DE;
Daniel Schneider, Mannheim, DE;
Klaus-Dieter Mohl, Hockenheim, DE;
Martin Schäfer, Grünstadt, DE;
Karin Pickenäcker, Lampertheim, DE;
Stefan Rittinger, Mannheim, DE;
Thomas Schaub, Neustadt, DE;
Joaquim Henrique Teles, Otterstadt, DE;
Rocco Paciello, Bad Dürkheim, DE;
Gerd Kaibel, Lampertheim, DE;
BASF SE, , 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 a tertiary amine (I) in a molar ratio of from 0.5 to 5 is produced by combining tertiary amine (I) and a formic acid source, from 10 to 100% by weight of the secondary components present therein are separated off and formic acid is removed by distillation in a distillation apparatus at a bottom temperature of from 100 to 300° C. and a pressure of from 30 to 3000 hPa abs from the liquid stream obtained, the bottom discharge from the distillation apparatus being separated into two liquid phases and the upper liquid phase being recycled to the formic acid source and the lower liquid phase being recycled for separating off the secondary components and/or to the distillation apparatus.