Title:
AIR SEPARATION
Document Type and Number:
WIPO Patent Application WO/2013/014252
Kind Code:
A3
Abstract:
An air separation process for the production of purified oxygen 9 from air 1 comprises: using a distillation column 104 to separate an incoming process stream 5; 211, 229 into a nitrogen stream 10 and an oxygen rich stream 6; 406, the distillation column 104 being at low pressure or at substantially ambient pressure; and using compression and cooling to provide a cold process stream 22, 23; 22, 23, 30, 31; 207, 208; 22, 23, 722, 723; 22, 23, 30, 31, 630, 631 for generating reflux 26; 35; 216; 26, 726 for the distillation column 104; wherein only a part of or none of the input process air 1 is compressed before distillation, with the remainder of the input process air 5; 229 being supplied to the distillation column 104 at low pressure or substantially ambient pressure; and wherein at least some of a nitrogen stream 10 produced by the distillation column 104 is rejected at substantially ambient pressure and temperature after heat exchange and without significant expansion or compression; such that during the air separation process a portion of the nitrogen in the incoming process air 1 that is not necessary for the production of oxygen of the desired purity does not undergo any significant compression.
Inventors:
GUNDERSEN TRULS (NO)
FU CHAO (NO)
EIMER DAG (NO)
FU CHAO (NO)
EIMER DAG (NO)
Application Number:
PCT/EP2012/064737
Publication Date:
April 02, 2015
Filing Date:
July 26, 2012
Export Citation:
Assignee:
NORWEGIAN UNIV SCI & TECH NTNU (NO)
GUNDERSEN TRULS (NO)
FU CHAO (NO)
EIMER DAG (NO)
GUNDERSEN TRULS (NO)
FU CHAO (NO)
EIMER DAG (NO)
International Classes:
F25J3/04
Foreign References:
| US4192662A | 1980-03-11 | |||
| US4464188A | 1984-08-07 | |||
| US5251450A | 1993-10-12 |
Attorney, Agent or Firm:
TAYLOR, Adam (St Bride's House10 Salisbury Square, London EC4Y 8JD, GB)
Download PDF:
Previous Patent: SWITCHING DEVICE
Next Patent: TREAD PATTERN FOR TIRES FOR A CIVIL ENGINEERING VEHICLE
Next Patent: TREAD PATTERN FOR TIRES FOR A CIVIL ENGINEERING VEHICLE