Carbon dioxide absorption methanol process

Patent · Tue Jun 23 00:00:00 EDT 1987

OSTI ID:6419205

Apffel, F P

A process is described for removing carbon dioxide from a feed stream of natural gas, having at least methane, ethane and heavier hydrocarbon, comprising: separating the feed stream in a first separator to form a first stream, having substantially all of the propane and heavier hydrocarbons and carbon dioxide and ethane, and a second stream, having methane, carbon dioxide and ethane; mixing the second stream with a polar compound to form a third stream; separating the vapor and liquid of the third stream in the bottom portion of an absorber; absorbing carbon dioxide and ethane from the separated vapor of Step C in a lean portion of the polar compound in the absorber, the absorber carbon dioxide and ethane forming a fourth stream; separating the ethane from the polar compound and carbon dioxide in a separator; separating the first stream in a third separator to separate the propane and heavier hydrocarbons from the carbon dioxide and ethane: carbon dioxide and ethane forms a fifth stream; and separating the polar compound/carbon dioxide effluent of the second separator in a fourth separator, to separate the carbon dioxide from the polar compound. The polar compound forming a sixth stream.

• Assignee: NOV-87-068681; EDB-87-134365
• Patent Number(s): US 4675035
• OSTI ID: 6419205
• Resource Relation: Patent File Date: Filed date 24 Feb 1986
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
CARBON DIOXIDE
ADSORPTION
AIR POLLUTION CONTROL
ETHANE
SEPARATION PROCESSES
METHANE
METHANOL
SORPTIVE PROPERTIES
PROPANE
LIQUID FLOW
MIXING
NATURAL GAS
POLAR COMPOUNDS
REMOVAL
SEPARATION EQUIPMENT
VAPORS
ALCOHOLS
ALKANES
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CONTROL
ENERGY SOURCES
FLUID FLOW
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
HYDROCARBONS
HYDROXY COMPOUNDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
SORPTION
SURFACE PROPERTIES
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)