[12] Patent
[11] Patent No.:GC0010474  
[45] Date of Publishing the Grant of the Patent: 31/May /2019                61/2019  
Number of the Decision to Grant the Patent:2019/151835
Date of the Decision to Grant the Patent:16/May/2019

[21] Application No.:GC 2013-25395

[22] Filing Date:18/9/2013

[30] Priority:

[33] State [32] Priority date [31] Priority No.

[72] Inventors:1- Kevin John SCHWINT،2- Robert John BRUMMER

[73] Owner: Lummus Technology Inc., 1515 Broad Street , Bloomfield, New Jersey 07003-3096, USA

[74] Agent: Abu-Gazaleh Intellectual Property L.L.C




Int. Cl.: B01J 20/22; C07C 11/167, 7/11, 7/12 (2006.01)

[56] Cited Documents:

-US 6337429 B1 (KINDLER, KLAUS et al.) 08 January 2002
-US 3232849 A (GRAHAM A. RENBERG et al.) 01 February 1966
-US 3284339 A (JOHN W. BEGLEY et al.) 08 November 1966
-US 3232850 A (GRAHAM A. RENBERG et al.) 01 February 1966
US 7495138 B2 (CRONE SVEN et al.) 24 February 2009
Examiner: Ohoud Matar Jamaan Al-Anazi

[57] Abstract: A process for recovering butadiene from a C4 fraction is disclosed. The process may include: contacting a mixed C4 stream comprising butane, butene, and butadiene, with a solvent comprising an organic solvent and water in a butadiene pre-absorber column to recover an overheads fraction comprising at least a portion of the butane, butene, and water, and a first bottoms fraction comprising the organic solvent, butadiene, and at least a portion of the butene; and feeding the first bottoms fraction to a butadiene extraction unit to recover a butene fraction, a crude butadiene fraction, and a solvent fraction.
No. of claims: 17     No. of figures: 2


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