Dual mixed refrigerant natural gas liquefaction

Patent · Tue Oct 08 04:00:00 EDT 1985

OSTI ID:5865338

Liu, Y -N; Pervier, J W

A process and apparatus is described for liquefying natural gas using two closed cycle, multicomponent refrigerants wherein a low level refrigerant cools and liquefies the gas by indirect heat exchange and a high level refrigerant cools and partially liquefies the low level refrigerant by indirect multistage heat exchange. The high level refrigerant is phase separated in order to use lighter refrigerant components to perform the final lowest level of refrigeration while the liquid phase of the separation is split and then expanded for refrigeration duty in order to avoid multiple flash separations wherein heavier components are used to provide the lower levels of refrigeration.

• Assignee: Air Products and Chemicals Inc.
• Patent Number(s): US 4545795
• OSTI ID: 5865338
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
030300* -- Natural Gas-- Drilling
Production
& Processing
COOLING
DESIGN
ENERGY SOURCES
ENERGY TRANSFER
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
HEAT TRANSFER
LIQUEFACTION
LIQUEFIED GASES
LIQUEFIED NATURAL GAS
NATURAL GAS
PRODUCTION
REFRIGERANTS
REFRIGERATION
REFRIGERATORS
SEPARATION PROCESSES
THERMOCHEMICAL PROCESSES
WORKING FLUIDS