[12] Patent
[11] Patent No.:GC0009338  
[45] Date of Publishing the Grant of the Patent: 31/Dec /2018                56/2018  
Number of the Decision to Grant the Patent:2018/141370
Date of the Decision to Grant the Patent:11/Dec/2018

[21] Application No.:GC 2015-30376

[22] Filing Date:12/11/2015

[30] Priority:

[33] State [32] Priority date [31] Priority No.
EP
14/11/2014
14193247.5

[72] Inventors:1- Ungelenk, Jan،2- Grüne, Philipp،3- Josch, Jan Pablo،4- Walsdorff, Christian،5- Bender, Michael

[73] Owners:1- BASF SE, 67056, Ludwigshafen, Germany،2- Linde Aktiengesellschaft, Klosterhofstr. 1 80331, Munchen, Germany

[74] Agent: Saba & Co. T.M.P

  

 

  

[51]IPC:
Int. Cl.: C07C 11/08, 11/167, 4/06, 5/48, 7/08, 7/09, 7/11, 7/148 (2006.01)

[56] Cited Documents:

-US 2013/281748 A1 (CHA KYONG-YONG [KR] ET AL) 24 October 2013
-WO 2014/160825 A1 (UOP LLC [US]) 02 October 2014
 
Examiner: Rami Al-Ghamdi

[54] PROCESS FOR PREPARING 1,3-BUTADIENE BY DEHYDROGENATING N-BUTENES WITH PROVISION OF A STREAM COMPRISING BUTANES AND 2-BUTENES
[57] Abstract: A process for preparing 1,3-butadiene from n-butenes, comprising the steps of: A)providing an input gas stream from a fluid catalytic cracking plant; B)removing isobutene from the input gas stream a, giving a stream b comprising butanes, 1-butene and 2-butene, with or without 1,3-butadiene; C)feeding the stream b into at least one dehydrogenating zone and dehydrogenating 1-butene and 2-butene to 1,3-butadiene, giving a product gas stream c comprising 1,3-butadiene; D)cooling and compressing the product gas stream c, giving at least one aqueous condensate stream d1 and a gas stream d2 comprising 1,3-butadiene, butanes, 2-butene and water vapor: Ea)removing uncondensable and low-boiling gas constituents comprising low-boiling hydrocarbons, as gas stream e2 from the gas stream d2 by absorbing the C4 hydrocarbons in an absorbent, giving an absorbent stream laden with C4 hydrocarbons and the gas stream e2, and Eb)subsequently desorbing the C4 hydrocarbons from the laden absorbent stream, giving a C4 hydrocarbon stream e1; F)separating the C4 hydrocarbon stream e1 by extractive distillation with a selective solvent into a stream f1 comprising 1,3-butadiene and the selective solvent and a stream f2 comprising butanes and 2-butene, wherein at least 90% of the 1-butene present in stream b is converted in step C) and a product stream f2 comprising butanes and 2-butene is obtained in step F.
No. of claims: 9     No. of figures: 1


 

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