Ethylene production with utilization of LNG refrigeration

Patent · Tue Oct 24 04:00:00 EDT 1978

OSTI ID:5720083

Baker, C R; Cheung, H

Union Carbide Corp. suggests using the cold energy available in LNG as a source of refrigeration in an ethylene plant of the type featuring a front-end depropanizer and a forecooling recovery section. The forecoolig section operates at lower than conventional temperature and pressure levels, the final separation section at conventional operating conditions. LNG is heat-exchanged with the recovered depropanizer-column overhead gas in the forecooling section and with overhead of the demethanizer and C/sub 2/ splitter columns to condense the reflux, closely matching the cooling curve of the ethylene plant with the LNG warming curve for a highly efficient utilization of the LNG refrigeration.

• Assignee: Union Carbide Corp.
• Patent Number(s): US 4121917
• OSTI ID: 5720083
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
030400* -- Natural Gas-- Products & By-Products
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320304 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Waste Heat Recovery & Utilization
ALKENES
COOLING
ENERGY SOURCES
ENERGY TRANSFER
ETHYLENE
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
HEAT TRANSFER
HYDROCARBONS
LIQUEFIED NATURAL GAS
NATURAL GAS
ORGANIC COMPOUNDS
REFRIGERATION
SYNTHESIS
USES