Global Patent Index - EP 2794540 A1

EP 2794540 A1 20141029 - PROCESS FOR PREPARING FORMIC ACID

Title (en)

PROCESS FOR PREPARING FORMIC ACID

Title (de)

VERFAHREN ZUR HERSTELLUNG VON AMEISENSÄURE

Title (fr)

PROCÉDÉ DE PRODUCTION D'ACIDE FORMIQUE

Publication

EP 2794540 A1 20141029 (DE)

Application

EP 12791502 A 20121129

Priority

  • EP 11194607 A 20111220
  • EP 2012073930 W 20121129
  • EP 12791502 A 20121129

Abstract (en)

[origin: WO2013092157A1] 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.

IPC 8 full level

C07C 51/02 (2006.01); C07C 51/09 (2006.01); C07C 51/41 (2006.01); C07C 51/44 (2006.01); C07C 51/50 (2006.01); C07C 53/02 (2006.01); C07C 53/06 (2006.01)

CPC (source: CN EP)

C07C 51/02 (2013.01 - CN EP); C07C 51/412 (2013.01 - CN EP); C07C 51/44 (2013.01 - CN EP)

C-Set (source: CN EP)

CN

  1. C07C 51/44 + C07C 53/02
  2. C07C 51/02 + C07C 53/02
  3. C07C 51/412 + C07C 53/06

EP

  1. C07C 51/02 + C07C 53/02
  2. C07C 51/44 + C07C 53/02
  3. C07C 51/412 + C07C 53/06

Citation (search report)

See references of WO 2013092157A1

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DOCDB simple family (publication)

WO 2013092157 A1 20130627; BR 112014015187 A2 20170613; BR 112014015187 A8 20170704; CA 2859128 A1 20130627; CN 103998409 A 20140820; CN 103998409 B 20151007; EP 2794540 A1 20141029; JP 2015505857 A 20150226; KR 20140105577 A 20140901; RU 2014129627 A 20160210; SG 11201402587U A 20140926; ZA 201405237 B 20160629

DOCDB simple family (application)

EP 2012073930 W 20121129; BR 112014015187 A 20121129; CA 2859128 A 20121129; CN 201280062525 A 20121129; EP 12791502 A 20121129; JP 2014547817 A 20121129; KR 20147019809 A 20121129; RU 2014129627 A 20121129; SG 11201402587U A 20121129; ZA 201405237 A 20140717