초록 ▼

Compositions useful in separating molecules or catalytic conversions comprise a substrate, a zeolite or zeolite-like layer, a selectivity enhancing coating in contact with the zeolite layer and optionally a permeable intermediate layer in contact with the substrate the zeolite layer being in contact

Compositions useful in separating molecules or catalytic conversions comprise a substrate, a zeolite or zeolite-like layer, a selectivity enhancing coating in contact with the zeolite layer and optionally a permeable intermediate layer in contact with the substrate the zeolite layer being in contact either with the substrate or the optional intermediate layer.

대표청구항 ▼

[ What is claimed is:] [9.] A separation process comprising contacting a feedstock derived from petroleum, natural gas, air or hydrocarbons, comprising at least two molecular species with a composition having a mass transfer resistance and which allows selective molecules to pass therethrough compri

[ What is claimed is:] [9.] A separation process comprising contacting a feedstock derived from petroleum, natural gas, air or hydrocarbons, comprising at least two molecular species with a composition having a mass transfer resistance and which allows selective molecules to pass therethrough comprising a substrate, a first layer of contiguous, intergrown zeolite or zeolite-like crystals, a selectivity enhancing coating in contact with the first layer, and a crystalline permeable intermediate layer in contact with the substrate, the first layer being in contact with the intermediate layer, wherein the first layer ranges from about 0.1 to 150 micrometers and has pore openings, about 50% of the pore openings being obstructed by the selectivity enhancing coating; and wherein the selectivity enhancing coating is capable of increasing the composition's is mass transfer resistance by a factor ranging from about 1 to about 5 and is selected from the group consisiting of permeable coatings, impermeable coatings, and mixtures thereof;wherein at least one molecular species of said feedstock is separated from said feedstock by said composition, and wherein said hydrocarbon feedstocks are selected from the group consisting of coal, bitumen, kerogen and mixtures thereof.