EP 2945922 A1 20151125 - METHOD FOR PRODUCING 1,3-BUTADIENE FROM N-BUTENES BY OXIDATIVE DEHYDROGENATION
Title (en)
METHOD FOR PRODUCING 1,3-BUTADIENE FROM N-BUTENES BY OXIDATIVE DEHYDROGENATION
Title (de)
VERFAHREN ZUR HERSTELLUNG VON 1,3-BUTADIEN AUS N-BUTENEN DURCH OXIDATIVE DEHYDRIERUNG
Title (fr)
PROCÉDÉ DE PRÉPARATION DE 1,3-BUTADIÈNE À PARTIR DE N-BUTÈNES PAR DÉSHYDROGÉNATION OXYDATIVE
Publication
Application
Priority
- EP 13151354 A 20130115
- EP 2014050675 W 20140115
- EP 14700500 A 20140115
Abstract (en)
[origin: WO2014111409A1] The invention relates to a method for producing butadiene from n-butenens, comprising the following steps: A) a feed gas flow (a) containing n-butenes is provided; B) the feed gas flow (a) containing n-butenes and an oxygen-containing gas is fed to at least one oxidative dehydrogenation area and is oxidatively dehydrogenated from n-butenes to form butadiene; a product gas flow (b) containing butadiene, unreacted n-butenes, water vapour, oxygen, low-boiling hydrocarbons, auxiliary components boiling at a hgh temperature and optionally carbon oxides and optionally inert gases is obtained; Ca) the product gas flow (b) is cooled by bringing it into contact with an organic solvent as a cooling agent, Cb) the product gas flow (b) is compressed in at least one compression step and at least one aqueous condensate flow (c1) and a gas flow (c2) containing butadiene, n-butenes, water vapour, oxygen, low-boiling hydrocarbons, optionally carbon oxides and optionally inert gases is obtained; D) non-condensable and low-boiling gas component parts containing oxygen, low-boiling hydrocarbons, optionally carbon oxides and optionally inert gases are separated as a gas flow (d2) from the gas flow (c2) by absorbing C4-hydrocarbons containing butadiene and n-butenes in absorption means, an absorption agent flow charged with C4-hydrocarbons and the gas flow (d2) are obtained, and subsequently the C4 hydrocarbons are desorbed from the charged absorption agent flow and a C4 -product gas flow (d1) is obtained; E) the C4-product flow (d1) is separated by extractive distillation using a selected solvent for butadiene in a butadiene and the material flow (e1) containing the solvent selective and a material flow (e2) containing a n-butene; F) the butadiene and material flow (e1) containing the selective solvent is distilled in a material flow (f1) consisting essentially of the selective solvent and a material flow (f2) containing a butadiene.
IPC 8 full level
C07C 5/48 (2006.01); C07C 7/00 (2006.01); C07C 7/08 (2006.01); C07C 7/11 (2006.01); C07C 11/167 (2006.01)
CPC (source: EP)
C07C 5/48 (2013.01); C07C 7/005 (2013.01); C07C 7/08 (2013.01); C07C 7/11 (2013.01); C07C 2523/887 (2013.01)
Citation (search report)
See references of WO 2014111409A1
Citation (examination)
EP 2826764 A1 20150121 - ASAHI KASEI CHEMICALS CORP [JP]
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 2014111409 A1 20140724; CN 105026344 A 20151104; EA 201591316 A1 20160129; EP 2945922 A1 20151125; JP 2016503073 A 20160201; KR 20150105456 A 20150916
DOCDB simple family (application)
EP 2014050675 W 20140115; CN 201480012975 A 20140115; EA 201591316 A 20140115; EP 14700500 A 20140115; JP 2015553064 A 20140115; KR 20157021798 A 20140115