Selective conversion of normal paraffins

An improved process for selectively removing normal paraffins from a hydrocarbon oil boiling in the range between about 100.degree. and about 750.degree. F. which comprises vaporizing said oil, contacting the vapors at a temperature of from about 800.degree. to about 1000.degree. F. and a pressure of from about 50 mm. of mercury to about 50 psi. with a 5A molecular sieve in a contacting zone, withdrawing from said zone oil vapors containing olefins formed by the selective conversion of normal paraffins, continuing said contacting until the vapors withdrawn have an undesirably high normal paraffin content, and thereafter regenerating said molecular sieve.

A process for selectively cracking normal paraffins to olefins, which paraffins are contained in a hydrocarbon oil which comprises contacting the oil at a cracking temperature in the range of from 800.degree.-1000.degree. F. with a crystalline metallic alumino-silicate having a uniform pore size of about 5 Angstrom Units in a contacting zone and withdrawing from said zone an oil having a reduced normal paraffins content and an increased olefin content.

A process for selectively cracking normal paraffins to olefins which paraffins are contained in a hydrocarbon oil which comprises contacting the oil at a cracking temperature in the range of from 800.degree. to 1100.degree. F. with a crystalline metallic alumino-silicate having a uniform pore size of about 5A in a contacting zone and withdrawing from said zone an oil having a reduced normal paraffin content and an increased olefin content.

A hydrocarbon conversion process which comprises contacting a hydrocarbon fluid in a conversion zone at elevated temperatures, under conditions to effect a conversion of said hydrocarbon fluid, with a crystalline metallic aluminosilicate catalyst having uniform pore openings of about 5 Angstrom units, said material being the sole conversion catalyst in said zone and recovering a converted hydrocarbon product having a molecular weight no higher than said first-named hydrocarbon fluid.

A hydrocarbon conversion process which comprises contacting a hydrocarbon fluid in a conversion zone at an elevated temperature with a crystalline metallic aluminosilicate catalyst having uniform pore openings of about 5 Angstrom units, said catalyst having been prepared by base exchange of the sodium form of the crystalline aluminosilicate with a cation to substantially reduce its sodium content and, thus, improve its catalytic ability for carrying out said conversion, and recovering a converted hydrocarbon product having a molecular weight no higher than said first-named hydrocarbon fluid.

A hydrocarbon conversion process which comprises contacting a hydrocarbon fluid in a conversion zone at an elevated temperature with a crystalline aluminosilicate catalyst having uniform pore openings of about 5 Angstrom units, said aluminosilicate having the major portion of its cation content supplied by a cation other than sodium, and recovering a converted hydrocarbon product having a molecular weight no higher than said first-named hydrocarbon fluid.

A hydrocarbon conversion process which comprises contacting a hydrocarbon fluid in a conversion zone at an elevated temperature with a crystalline aluminosilicate catalyst having uniform pore openings of about 5 Angstrom units, said aluminosilicate being substantially free of exchangeable sodium, and recovering a converted hydrocarbon product having a molecular weight no higher than said first-named hydrocarbon fluid.

A process for cracking a gas oil which comprises contacting said gas oil at a temperature of about 800.degree. F. to 1,000.degree. F. and at a pressure of about 0 psig. to 150 psi. with a crystalline metallic aluminosilicate catalyst having uniform pore openings of about 5 Angstrom units, said aluminosilicate having the major portion of its cation content supplied by a cation other than sodium.

A hydrocarbon conversion process which comprises contacting a hydrocarbon fluid in a conversion zone at an elevated temperature with a catalyst consisting essentially of a crystalline metallic aluminosilicate having uniform pore openings of about 5 Angstrom units, said catalyst having been prepared by base exchange of the sodium form of the crystalline aluminosilicate with a cation selected from the group consisting of alkali metal and alkaline earth metal cations to substantially reduce its sodium content and, thus, improve its catalytic ability for carrying out said conversion, and recovering a converted hydrocarbon product having a molecular weight no higher than said first-named hydrocarbon fluid.

A process for cracking a gas oil which comprises contacting said gas oil at a temperature of about 800.degree. F. to 1,000.degree. F. and at a pressure of about 0 psig. to 150 psi. with a crystalline metallic aluminosilicate catalyst having uniform pore openings of about 5 Angstrom units, said aluminosilicate having the major portion of its cation content supplied by a cation, other than sodium selected from the group consisting of alkali and alkaline earth metal cations.