Global Patent Index - EP 3022169 A1

EP 3022169 A1 20160525 - METHOD FOR PRODUCING 1,3-BUTADIEN FROM N-BUTENES BY MEANS OF AN OXIDATIVE DEHYDROGENATION

Title (en)

METHOD FOR PRODUCING 1,3-BUTADIEN FROM N-BUTENES BY MEANS OF AN OXIDATIVE DEHYDROGENATION

Title (de)

VERFAHREN ZUR HERSTELLUNG VON 1,3-BUTADIEN AUS N-BUTENEN DURCH OXIDATIVE DEHYDRIERUNG

Title (fr)

PROCÉDÉ DE PRODUCTION DE 1,3-BUTADIÈNE À PARTIR DE N-BUTÈNES PAR DÉSHYDROGÉNATION OXYDATIVE

Publication

EP 3022169 A1 (DE)

Application

EP 14739155 A

Priority

  • EP 13177081 A
  • EP 2014065068 W
  • EP 14739155 A

Abstract (en)

[origin: WO2015007698A1] The invention relates to a method for producing butadien from n-butenes, having the following steps: A) providing an n-butene-containing feed gas flow a; B) supplying the n-butene-containing feed gas flow a and an oxygen-containing gas to at least one oxidative dehydrogenation zone and carrying out an oxidative dehydrogenation of n-butenes into butadiene, a product gas flow b being obtained containing butadiene, non-converted n-butenes, steam, oxygen, low-boiling point hydrocarbons, high-boiling point auxiliary components, optionally carbon oxides, and optionally inert gases; Ca) cooling the product gas flow b by brining the product gas flow into contact with a coolant and condensing at least some of the high-boiling point auxiliary components; Cb) compressing the remaining product gas flow b in at least one compression stage, wherein at least one aqueous condensate flow c1 and a gas flow c2 containing butadiene, n-butenes, steam, oxygen, low-boiling point hydrocarbons, optionally carbon oxide, and optionally inert gases are obtained; Da) separating non-condensable and low-boiling point gas components comprising oxygen, low-boiling point hydrocarbons, optionally carbon oxide, and optionally inert gases as a gas flow d2 from the gas flow c2 by absorbing the C4 hydrocarbons comprising butadiene and n-butenes in an absorption agent, an absorption agent flow loaded with C4 hydrocarbons and the gas flow d2 being obtained, and Db) subsequently desorbing the C4 hydrocarbons from the loaded absorption agent flow, a C4 product gas flow d1 being obtained. The invention is characterized in that a methane-containing gas flow is additionally supplied at at least one point in the method section comprising the steps B), Ca), Cb), and Da) in such quantities that the formation of an explosive gas mixture in step Da) is prevented.

IPC 8 full level

C07C 5/48 (2006.01); C07C 11/167 (2006.01)

CPC (source: EP US)

C07C 5/48 (2013.01 - EP US); C07C 7/11 (2013.01 - EP US)

C-Set (source: EP)

  1. C07C 5/48 + C07C 11/167
  2. C07C 7/11 + C07C 11/167

 

Citation (search report)

See references of WO 2015007698A1

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

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

WO 2015007698 A1 20150122; CN 105555742 A 20160504; EP 3022169 A1 20160525; JP 2016527224 A 20160908; KR 20160032188 A 20160323; US 2016152531 A1 20160602

DOCDB simple family (application)

EP 2014065068 W 20140715; CN 201480050111 A 20140715; EP 14739155 A 20140715; JP 2016526568 A 20140715; KR 20167003769 A 20140715; US 201414905497 A 20140715