System and method for producing 1-butene are disclosed. The method includes dehydrogenating butane to form a mixture comprising butene isomers. 1-butene is separated from the mixture using a system that includes a membrane. The system also includes an isomerizing unit for isomerizing cis-2-butene and trans-2-butene to form additional 1-butene.

System and method for producing 1-butene are disclosed. The method includes dehydrogenating butane to form a mixture comprising butene isomers. 1-butene is separated from the mixture using a system that includes a membrane. The system also includes an isomerizing unit for isomerizing cis-2-butene and trans-2-butene to form additional 1-butene.

The present disclosure relates to a dehydrogenation catalyst for use in dehydrogenation of a branched light hydrocarbon gas, the catalyst including platinum, tin, and an alkali metal which are carried in a phase-changed carrier, in which platinum and tin form a single complex and are present in an alloy form within a predetermined thickness from the outer surface of the catalyst.

The present disclosure relates to a dehydrogenation catalyst for use in dehydrogenation of a branched light hydrocarbon gas, the catalyst including platinum, tin, and an alkali metal which are carried in a phase-changed carrier, in which platinum and tin form a single complex and are present in an alloy form within a predetermined thickness from the outer surface of the catalyst.

Systems and methods for producing butadiene are disclosed. In a reaction unit, n-butane is dehydrogenated in the presence of a double-dehydrogenation catalyst to produce a mixture that includes butadiene and unreacted n-butane. An extractive distillation unit that uses soybean oil as the solvent is utilized to extract at least some of the unreacted n-butane from the mixture.

Systems and methods for producing butadiene are disclosed. In a reaction unit, n-butane is dehydrogenated in the presence of a double-dehydrogenation catalyst to produce a mixture that includes butadiene and unreacted n-butane. An extractive distillation unit that uses soybean oil as the solvent is utilized to extract at least some of the unreacted n-butane from the mixture.

A process is provided for dehydrogenating a paraffinic hydrocarbon comprising sending the paraffinic hydrocarbon to a fluidized bed reactor to be contacted at dehydrogenation reaction conditions with a catalyst composition comprising less than about 0.0999 wt % platinum and about 0.05-2.5 wt % Group I or Group II elements or a mixture thereof. The catalytic composition is prepared without addition of tin, gallium, indium, germanium or lead.

A process is provided for dehydrogenating a paraffinic hydrocarbon comprising sending the paraffinic hydrocarbon to a fluidized bed reactor to be contacted at dehydrogenation reaction conditions with a catalyst composition comprising less than about 0.0999 wt % platinum and about 0.05-2.5 wt % Group I or Group II elements or a mixture thereof. The catalytic composition is prepared without addition of tin, gallium, indium, germanium or lead.

A process for recovering hydrogen from dehydrogenation reactor effluent is disclosed. A feed stream comprising hydrocarbons and hydrogen to a dehydrogenation reactor maintained at dehydrogenation conditions to provide a dehydrogenation reactor effluent. The dehydrogenation reactor effluent is passed to a cold box separation unit to provide a liquid hydrocarbon product stream and a recycle hydrogen stream. A return portion of the recycle hydrogen stream is passed to the reactor effluent compressor. The subject matter disclosed improved process and apparatus which enables the paraffin dehydrogenation reactor to run at reduced H.sub.2/HC ratio without requiring an investment in a resized compressor or resized turboexpanders or separators in the cold box.

A process for recovering hydrogen from dehydrogenation reactor effluent is disclosed. A feed stream comprising hydrocarbons and hydrogen to a dehydrogenation reactor maintained at dehydrogenation conditions to provide a dehydrogenation reactor effluent. The dehydrogenation reactor effluent is passed to a cold box separation unit to provide a liquid hydrocarbon product stream and a recycle hydrogen stream. A return portion of the recycle hydrogen stream is passed to the reactor effluent compressor. The subject matter disclosed improved process and apparatus which enables the paraffin dehydrogenation reactor to run at reduced H.sub.2/HC ratio without requiring an investment in a resized compressor or resized turboexpanders or separators in the cold box.