Title:
A PROCESS FOR PRODUCING LIQUID NITROGEN
Document Type and Number:
WIPO Patent Application WO/2015/095031
Kind Code:
A3
Abstract:
A process for producing a liquid nitrogen product through the cryogenic separation of air in a nitrogen production plant is provided. The nitrogen production plant can include a main air compressor; a heat exchanger (10); an air separation unit (19) having a single column (20), a top condenser (23), and a bottom reboiler (21); a recycle compressor (40); at least one turbine-booster having a booster (50) and a turbine (70); a liquid/gas separator (60); and a subcooler (30). The reboiler can be driven by gaseous nitrogen (44) withdrawn from the recycle compressor, preferably at a first stage discharge of the recycle compressor. Additionally, the single column can be partly refluxed with liquid nitrogen (66) split-off from a Joule-Thompson stream.
Inventors:
MUSICUS PAUL (US)
Application Number:
PCT/US2014/070318
Publication Date:
February 25, 2016
Filing Date:
December 15, 2014
Export Citation:
Assignee:
AIR LIQUIDE (FR)
MUSICUS PAUL (US)
MUSICUS PAUL (US)
International Classes:
F25J3/04
Foreign References:
| US20020062658A1 | 2002-05-30 | |||
| DE4030750A1 | 1992-04-02 | |||
| US20020066289A1 | 2002-06-06 |
Attorney, Agent or Firm:
MURRAY, Justin K. et al. (2700 Post Oak Blvd. Suite 32, Houston Texas, US)
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