Recovery and purification of hydrogen from refinery and petrochemical off-gas streams

Patent · Tue Apr 26 04:00:00 EDT 1988

OSTI ID:6960047

Mehra, Y R

A process of producing a hydrogen-rich gas product stream as an overhead stream and a rich solvent stream as a bottoms stream from an inlet stream of gas is described comprising hydrogen and hydrocarbon by contacting the inlet hydrogen-containing gas stream with a stream of lean preferential physical solvent in which the hydrocarbons are more soluble and less volatile than hydrogen. The solvent is: A. selected from the group consisting of dialkyl ethers of polyalkylene glycol, N-methyl pyrrolidone, dimethylformamide, propylene carbonate, sulfolane, glycol triacetate, and C/sub 8/ to C/sub 10/ aromatic compounds having methyl, ethyl, propyl, or butyl aliphatic groups specifically constituting a sub-group of mesitylene, n-propyl benzene, n-butyl benzene, cumene, o-xylene m-xylene, p-xylene and mixtures thereof and aromatic streams rich in mixed xylenes, and other C/sub 8/-C/sub 10/ aromatics; and B. selective for methane and heavier hydrocarbon components of the inlet gas stream.

• Assignee: Extraction Technologies, Inc., Houston, TX
• Patent Number(s): US 4740222
• OSTI ID: 6960047
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020800 -- Petroleum-- Waste Management
08 HYDROGEN
080102* -- Hydrogen-- Production-- Thermochemical Processes
ALKANES
ALKYL RADICALS
CHEMICAL COMPOSITION
CHEMICAL PLANTS
CHEMICAL REACTIONS
DEHYDROGENATION
ELEMENTS
ETHERS
GASEOUS WASTES
HYDROCARBONS
HYDROGEN
HYDROGEN PRODUCTION
INDUSTRIAL PLANTS
MANAGEMENT
METHANE
NONMETALS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PETROCHEMICAL PLANTS
PETROLEUM REFINERIES
PROCESSING
PURIFICATION
RADICALS
RECOVERY
SOLUBILITY
VOLATILITY
WASTE MANAGEMENT
WASTE PROCESSING
WASTES