EP 3411348 A1 20181212 - METHOD FOR PREPARING 1,3-BUTADIENE FROM N-BUTENES BY OXIDATIVE DEHYDROGENATION
Title (en)
METHOD FOR PREPARING 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 16154181 A 20160204
- EP 2017051892 W 20170130
Abstract (en)
[origin: WO2017133997A1] The invention relates to a method for preparing butadiene from n-butenes, comprising the steps of: A) providing a feed gas stream (a) containing n-butenes; B) feeding the feed gas stream (a) containing n-butenes and a gas containing oxygen into at least one oxidative dehydrogenation zone and oxidatively dehydrogenating n-butenes to form butadiene, resulting in a product gas stream (b) containing butadiene, unreacted n-butenes, steam, oxygen, low-boiling hydrocarbons, high-boiling secondary components, optionally carbon oxides and optionally inert gases; Ca) cooling the product gas stream (b) by bringing it into contact with a coolant, and condensing at least some of the high-boiling secondary components; Cb) compressing the remaining product gas stream (b) in at least one compression stage, resulting in at least one aqueous condensate stream (c1) and one gas stream (c2) containing butadiene, n-butenes, steam, oxygen, low-boiling hydrocarbons, optionally carbon oxides and optionally inert gases; Da) removing non-condensable and low-boiling gas constituents comprising oxygen, low-boiling hydrocarbons, optionally carbon oxides and optionally inert gases as a gas stream (d2) from gas stream (c2) by absorbing the C4 hydrocarbons comprising butadiene and n-butenes in an absorbent, resulting in an absorbent stream laden with C4 hydrocarbons and gas stream (d2), and Db) subsequently desorbing the C4 hydrocarbons from the laden absorbent stream in a desorption column, resulting in a C4 product gas stream (d1), Dc) the steam condensate is separated from the absorption agent in a phase separator, is evaporated in a steam generator and is reintroduced as a stripping gas into the desorption column, characterised in that the steam condensate is subject to a pretreatment prior to the evaporation in a steam generator in an additional step.
IPC 8 full level
C07C 5/48 (2006.01); C07C 7/04 (2006.01); C07C 7/08 (2006.01); C07C 7/11 (2006.01); C07C 11/08 (2006.01); C07C 11/167 (2006.01)
CPC (source: EP KR US)
B01J 23/002 (2013.01 - KR); C07C 5/48 (2013.01 - EP KR US); C07C 7/005 (2013.01 - KR); C07C 7/04 (2013.01 - EP US); C07C 7/08 (2013.01 - EP KR US); C07C 7/09 (2013.01 - KR); C07C 7/11 (2013.01 - EP KR US); C07C 11/08 (2013.01 - US); C07C 11/167 (2013.01 - KR US); B01J 2523/13 (2013.01 - KR); B01J 2523/48 (2013.01 - KR); B01J 2523/54 (2013.01 - KR); B01J 2523/67 (2013.01 - KR); B01J 2523/68 (2013.01 - KR); B01J 2523/842 (2013.01 - KR); B01J 2523/847 (2013.01 - KR); C07C 2521/06 (2013.01 - EP US); C07C 2523/31 (2013.01 - EP US); C07C 2523/86 (2013.01 - EP US); C07C 2523/88 (2013.01 - EP US); C07C 2523/881 (2013.01 - EP US)
Citation (search report)
See references of WO 2017133997A1
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 2017133997 A1 20170810; CN 108884003 A 20181123; EP 3411348 A1 20181212; JP 2019508401 A 20190328; KR 20180121519 A 20181107; US 10647639 B2 20200512; US 2019039971 A1 20190207
DOCDB simple family (application)
EP 2017051892 W 20170130; CN 201780009589 A 20170130; EP 17702600 A 20170130; JP 2018540714 A 20170130; KR 20187025527 A 20170130; US 201716074454 A 20170130