Title:
PROCESS FOR THE REMOVAL OF CO2 FROM ACID GAS
Document Type and Number:
WIPO Patent Application WO/2014/054945
Kind Code:
A3
Abstract:
The invention relates to a process for the removal of CO2 from acid gas by cryogenic distillation performed in two steps. The feed mixture is first distilled at high pressure (at least 45 bar) in a first distillation column. The top product or a part thereof is then, after heating, subjected to a second distillation step at a lower pressure (lower than 45 bar). The top product of the second distillation step is methane of high purity (more than 99 mol.%). The bottom product of the second distillation step is recycled back to the first distillation column. The method according to the invention allows complete separation of methane also at higher level of acidic components, is economical and does not result in solid CO2 build-up, which is a common problem in cryogenic distillation.
Inventors:
PELLEGRINI LAURA ANNAMARIA (IT)
Application Number:
PCT/NL2013/050698
Publication Date:
March 19, 2015
Filing Date:
October 01, 2013
Export Citation:
Assignee:
STAMICARBON BV DBA MT INNOVATION CT (NL)
PELLEGRINI LAURA ANNAMARIA (IT)
PELLEGRINI LAURA ANNAMARIA (IT)
International Classes:
F25J3/02; C10L3/10
Foreign References:
| US2888807A | 1959-06-02 | |||
| US4762543A | 1988-08-09 | |||
| US5335504A | 1994-08-09 | |||
| DE2622662A1 | 1976-12-02 |
Other References:
SCHIANNI G C: "CRYOGENIC REMOVAL OF CARBON DIOXIDE FROM NATURAL GAS", NATURAL GAS PROCESSING AND UTILISATION : [PROCEEDINGS OF] AN INTERNATIONAL CONFERENCE ORGANISED BY THE IRISH GROUP OF THE INSTITUTION OF CHEMICAL ENGINEERS WITH THE CO-OPERATION AND ASSISTANCE OF THE INSTITUTION OF ENGINEERS OF IRELAND, DUBLIN, REPUB, vol. 44, 1 January 1976 (1976-01-01), pages 50 - 55, XP009168201, ISBN: 0-85295-011-X
Attorney, Agent or Firm:
JANSEN, C.M. (Johan de Wittlaan 7, JR Den Haag, NL)
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