[12] Patent
[11] Patent No.:GC0004526  
[45] Date of Publishing the Grant of the Patent: 31/Dec /2016                32/2016  
Number of the Decision to Grant the Patent:2016/89622
Date of the Decision to Grant the Patent:18/Dec/2016

[21] Application No.:GC 2011-17948

[22] Filing Date:12/3/2011

[30] Priority:

[33] State [32] Priority date [31] Priority No.
DE
11/3/2010
1020100110140

[72] Inventors:1- Bernd Heida،2- Randolf Hugo

[73] Owner: BASF SE, 67056, Ludwigshafen , Germany

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

  

 

  

[51]IPC:
Int. Cl.: B01D 3/40; C07C 11/167, 7/08 (2006.01)

[56] Cited Documents:

-US 4 277 313 A (MEHRA YUV R ET AL) 7 Jul y 1981
-WO 2010/008109 Al (SK ENERGY co LTD [KR] ;LEE HEE DU [KR] ; OH KYUNG JONG [KR] ; KOMINSU) 21 January 2010
 
Examiner: Eng. Abdallah I. AlKhatib

[54] PROCESS AND APPARATUS FOR ISOLATING PURE 1,3-BUTADIENE FROM CRUDE 1,3-BUTADIENE BY DISTILLATION
[57] Abstract: The invention relates to a process for isolating pure 1,3-butadiene from a C4 fraction (1) comprising 1,3-butadiene together with butanes, butenes and from 0.5 to 3% by weight of acetylenes, based on the total weight of the C4 fraction, by extractive distillation using a selective solvent, wherein- a proportion of from 90 to 99% by weight, based on the total weight of the acetylenes comprised in the C4 fraction, is selectively hydrogenated in a first process step to give a partially hydrogenated C4 fraction which- is subsequently, in further process steps, worked up by extractive distilla-tion using the selective solvent and- pure distillation to give pure 1,3-butadiene, with the acetylenes remaining in the partially hydrogenated C4 fraction being discharged in the process steps following the partial hydrogenation.(Figure 1)
No. of claims: 4     No. of figures: 1


 

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