Hydrogen cryogenic purification system

Patent · Tue Jan 06 00:00:00 EST 1981

OSTI ID:6360703

Schaefer, A E

A process is disclosed for the cryogenic purification of industrial by-product gas streams containing recoverable hydrogen. Two feed streams, one of which contains non-readily condensible compounds having boiling points below that of methane , are passed through a successive series of cooling and separation stages. A condensed bottom fraction is separated in a separation drum from an overhead of increasing purity at each stage, and the condensates are combined into one or more condensate streams. The overhead from the stream containing the non-readily condensible compounds is injected into a combined condensate stream, reducing the temperature thereof, and the combined condensate stream is passed back through the heat exchange means to provide refrigeration for the system. An increased amount of hydrogen product is thereby recovered. Additionally, the condensate streams may be passed separately back through the heat exchange means to recover their more valuable components which are suitable for further purification. In particular, unsaturated hydrocarbons can be recovered in a more concentrated form for improved ethylene and propylene recovery.

• Assignee: Braun, C.F., and Co
• Patent Number(s): US 4242875
• OSTI ID: 6360703
• Resource Relation: Patent File Date: Filed date 10 May 1978
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
02 PETROLEUM
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
ALKENES
RECOVERY
HYDROGEN
PURIFICATION
BY-PRODUCTS
CONDENSATES
COOLING
CRYOGENICS
HEAT EXCHANGERS
HYDROCARBONS
PETROCHEMICALS
PETROLEUM REFINERIES
ELEMENTS
INDUSTRIAL PLANTS
NONMETALS
ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
080100* - Hydrogen- Production
020500 - Petroleum- Products & By-Products
320305 - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Industrial Waste Management