[12] Patent
[11] Patent No.:GC0009369  
[45] Date of Publishing the Grant of the Patent: 31/Dec /2018                56/2018  
Number of the Decision to Grant the Patent:2018/141601
Date of the Decision to Grant the Patent:13/Dec/2018

[21] Application No.:GC 2013-24175

[22] Filing Date:23/4/2013

[30] Priority:

[33] State [32] Priority date [31] Priority No.
US
26/4/2012
13/456,854

[72] Inventors:1- PAUL HIGGINBOTHAM،2- JOHN EUGENE PALAMARA

[73] Owner: AIR PRODUCTS AND CHEMICALS, INC., 7201 HAMILTON BOULEVARD, PA 18195-1501, ALLENTOWN, USA

[74] Agent: Suleiman I. Al-Ammar Law Office

  

 

  

[51]IPC:
Int. Cl.: B01D 3/00; C01B 31/20 (2006.01)

[56] Cited Documents:

-US 1643451 A ( HICKMAN CHARLES D ) 27 SEPTMBER 1927
-US 2003161780 A1 (HOWARD HENRY EDWARD [US]; BILLINGHAM JOHN FREDRIC [US] ) 28 AUGUST 2003
 
Examiner: Bander M. Al-Thobity

[54] PURIFICATION OF CARBON DIOXIDE
[57] Abstract: Impurities that are less volatile than carbon dioxide, e.g. hydrogen sulphide, are removed from crude carbon dioxide by processes involving sub-ambient distillation of said crude carbon dioxide in a distillation column system operating at super-atmospheric pressure(s) to produce carbon dioxide-enriched overhead vapour and bottoms liquid enriched with said impurities. Where such processes involve at least one heat pump cycle, significant savings in power consumption are realised when the process uses more than one recycle pressure in the heat pump cycle(s).
No. of claims: 65     No. of figures: 13


 

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