초록 ▼

An active and stable catalyst for isomerizing linear olefins to methyl branched isoolefins is provided by (a) mixing (i) a zeolite powder containing at least one zeolite with at least one one-dimensional pore structure having pore size small enough to retard by-product dimerization and coke formatio

An active and stable catalyst for isomerizing linear olefins to methyl branched isoolefins is provided by (a) mixing (i) a zeolite powder containing at least one zeolite with at least one one-dimensional pore structure having pore size small enough to retard by-product dimerization and coke formation and large enough to permit entry of the linear olefin and allow formation of the methyl branched isoolefin, (ii) an alumina-containing binder, (iii) water, (iv) at least one acid selected from monocarboxylic acids and inorganic acids and (v) at least one polycarboxylic acid; (b) forming a pellet of the mixture; and (c) calcining the pellet. The resulting catalyst has superior selectivity, higher maximum product concentration in the product stream and longer run length for isomerizing linear olefins to their corresponding isoolefins.

대표청구항 ▼

A process for structurally isomerizing a linear olefin of at least 4 carbon atoms to its corresponding methyl branched isoolefin comprising contacting at a temperature of from about 200°C. to about 650°C. a hydrocarbon feed stream containing at least one said linear olefin with an isomerizing cataly

A process for structurally isomerizing a linear olefin of at least 4 carbon atoms to its corresponding methyl branched isoolefin comprising contacting at a temperature of from about 200°C. to about 650°C. a hydrocarbon feed stream containing at least one said linear olefin with an isomerizing catalyst produced by the process which comprises: (a) mixing (i) a zeolite powder comprising at least one zeolite with at least one one-dimensional pore structure having a pore size greater than about 0.42 nm to less than about 0.7 nm, (ii) an alumina-containing binder, (iii) water, (iv) from about 0.1 weight percent to about 6 weight percent, based on (i) and (ii), of at least one acid selected from the group consisting of monocarboxylic acids and inorganic acids, and (v) from about 0.1 weight percent to about 6 weight percent, based on (i) and (ii), of at least one polycarboxylic acid thereby producing a mixture; (b) forming a pellet of said mixture; and (c) calcining said pellet at a temperature of from about 200°C. to about 700°C.