A multimetallic catalyst having a substrate, intermediate layer and catalyst layer. The catalyst exhibits selectivity greater than 90% and a conversion rate of greater than 30%.

The present invention relates to a method for preparing, activating and regenerating a metal supported catalyst, comprising: treating a M.sub.a-M.sub.b-M.sub.c metal supported catalyst at 10-700? C. by using an ammonia or nitrogen-containing organic matter, wherein the M.sub.a metal is an active metal selected from one or more of a noble metal atom or a transition metal, the support is a common industrial porous catalyst, and the M.sub.a metal is dispersed on the support in a state of single atomic site. According to the M.sub.d-M.sub.b-M.sub.c metal supported noble metal/zinc catalyst treated by the method of the present invention, the direct dehydrogenation conversion rate and selectivity of catalyzing light alkanes are remarkably improved; the method for preparing the catalyst is simple in process, the catalytic activity after regeneration is still kept, and the catalyst can be industrially produced on a large scale.

A method for recovering ethylene from cracked gas comprises: (a) hydrogenating a composition comprising acetylene and an acetylene extraction solvent to produce a first gaseous hydrocarbon stream and a first liquid stream; (b) contacting the first gaseous hydrocarbon stream with a second acetylene extraction solvent stream in an acetylene scrubber unit to produce a second liquid stream and a gaseous ethylene product stream; (c) contacting the first liquid stream of step (a) with the second liquid stream of step (b) in an ethylene stripper unit to produce a recovered gaseous ethylene stream and a third liquid stream; and (d) providing the recovered gaseous ethylene stream to step (b).

A multimetallic catalyst having a substrate, promoter and catalytic metal.

Integrated processes for the conversion of hydrocarbons to C2 and C3 unsaturated hydrocarbons include combustion and cracking of hydrocarbons, dry oxidative reforming of methane, and catalytic hydrogenation of acetylene. Reactive products formed among the integrated processes may be distributed and recycled among the processes for the conversion of the hydrocarbon feedstock.

A catalyst for hydrogenation reaction processes includes an oxide substrate surface, a MO.sub.x promoter, where M is a transition metal or main group elemental oxide, the promoter being deposited on the substrate, and a platinum group catalytic metal.

A catalyst for hydrogenation reaction processes includes an oxide substrate surface, a MO.sub.x promoter, where M is a transition metal or main group elemental oxide, the promoter being deposited on the substrate, and a platinum group catalytic metal.

A multimetallic catalyst having a substrate, promoter and catalytic metal.

A multimetallic catalyst having a substrate, intermediate layer and catalyst layer. The catalyst exhibits selectivity greater than 90% and a conversion rate of greater than 30%.

The present invention relates to a catalytically active material, the preparation thereof, and the use of the catalytically active material, e.g. in the catalytic oxidation of CO to CO.sub.2 or in the catalytic hydrogenation of alkyne. The catalytically active material comprises a support5 comprising a metal oxide, and atomically dispersed noble metal on the surface of the support, wherein the metal oxide is selected from TiO.sub.2, CeO.sub.2, ZnO, SnO.sub.2, Ga.sub.2O.sub.3, In.sub.2O.sub.3, ZrO.sub.2, and Fe.sub.2O.sub.3, the noble metal is selected from Pt, Pd, Rh, and Au, and the catalytically active material is obtainable by a method comprising a step of non-thermal plasma treatment in the presence of O.sub.2.