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Double mixed refrigerant liquefaction process for natural gas

Patent ·
OSTI ID:5586378
;
A process and system are set forth for precooling, liquefying and subcooling a methane-rich feed stream, such as natural gas, with two closed circuit multicomponent refrigerant cycles in which the first refrigerant comprises a binary mixture of propane and butane in a flash refrigeration cycle and the second refrigerant comprises a mixture of nitrogen, methane, ethane, propane and butane in a subcool refrigeration cycle. The first refrigerant preferably cools the feed stream in a plate and fin heat exchanger.
Assignee:
Air Products and Chemicals Inc.
Patent Number(s):
US 4504296
OSTI ID:
5586378
Country of Publication:
United States
Language:
English

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Related Subjects

03 NATURAL GAS
030300* -- Natural Gas-- Drilling
Production
& Processing
ALKANES
BUTANE
CHEMICAL COMPOSITION
CLOSED-CYCLE COOLING SYSTEMS
COOLING
COOLING SYSTEMS
ENERGY SOURCES
ENERGY SYSTEMS
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
HYDROCARBONS
LIQUEFACTION
METHANE
NATURAL GAS
ORGANIC COMPOUNDS
PROPANE
REFRIGERANTS
THERMOCHEMICAL PROCESSES
WORKING FLUIDS