Title:
PROCESS FOR RELIQUEFYING A METHANE-RICH FRACTION
Document Type and Number:
WIPO Patent Application WO/2013/164069
Kind Code:
A3
Abstract:
A process for reliquefying a methane-rich fraction, especially boil-off gas, is described. In this process, a) the methane-rich fraction (1) is compressed (C1) to a pressure at least 20% above the critical pressure of the fraction to be compressed, b) liquefied and subcooled (E2), c) decompressed (V1) to a pressure between 5 and 20 bar, and d) separated into a gaseous nitrogen-rich (4) and a liquid nitrogen-depleted fraction (7), and e) the nitrogen-depleted fraction (7) is decompressed (V2) to a pressure between 1.1 and 2.0 bar, f) wherein the gaseous fraction (8) obtained is added to the methane-rich fraction (1) without being warmed up and compressed, and g) the liquid product fraction (9) which is obtained in the decompression of the low-nitrogen fraction has a nitrogen content of ≤ 1.5 mol%.
More Like This:
Inventors:
BAUER HEINZ (DE)
FRANKE HUBERT (DE)
BUB ANDREAS (DE)
FRANKE HUBERT (DE)
BUB ANDREAS (DE)
Application Number:
PCT/EP2013/001157
Publication Date:
April 16, 2015
Filing Date:
April 18, 2013
Export Citation:
Assignee:
LINDE AG (DE)
International Classes:
F25J1/00; C10L3/10; F25J1/02; F25J3/02; F25J3/06
Domestic Patent References:
| WO2010108464A2 | 2010-09-30 | |||
| WO2007117148A1 | 2007-10-18 |
Foreign References:
| EP0153649A2 | 1985-09-04 | |||
| US3857245A | 1974-12-31 | |||
| US20110146341A1 | 2011-06-23 |
Attorney, Agent or Firm:
LINDE AG (Dr.-Carl-von-Linde-Str. 6-14, Pullach, DE)
Download PDF: