Abstract: Noxious emissions produced in the process of regenerating catalysts employed in the catalytic cracking of hydrocarbons are reduced by burning the coke on the spent catalyst in a regenerator operated at a temperature greater than 1200.degree. F. to produce flue gas containing less than 2.0 vol.

Abstract: A process for rejuvenating crystalline aluminosilicayte zeolite-containing catalysts which have become at least partially deactivated through use in a hydrocracking process. Used, deactivated catalysts are treated with ion-containing solutions, particularly those containing hydrogen ions and hydrogen precursors, at a pH of from 3.5 to about 9, such that the alkali metal content of the catalyst is substantially reduced to thereby rejuvenate the catalyst to at least its original fresh activity in a hydrocracking process.

Abstract: Normal paraffins are selectively adsorbed and cracked to olefins by contact with a 5 A crystalline alumino-silicate. The normal paraffins are thus removed from a mixture thereof with other hydrocarbons.

Abstract: A high surface area alumina is provided exhibiting a surface area ranging from about 350 to about 550 meters.sup.2 /gram.The high surface area alumina is prepared by reacting substantially anhydrous aluminum chloride with ammonia at temperatures ranging from about 100.degree. to about 900.degree. F. to form an aluminum chloride-ammonia complex comprising aluminum chloride polyammoniates, and hydrolyzing said polyammoniates to obtain high surface area alumina.

Abstract: Sulfur and metal contaminants, such as nickel, vanadium and iron, are removed from hydrocarbon feedstocks, by contacting the feedstocks at an elevated temperature and pressure in the presence of hydrogen and a catalyst comprising a hydrogenation component and a support material comprised of phosphorus oxide and alumina. The hydrogenation component includes a Group VIB and/or Group VIII metal of the Periodic Table, particularly molybdenum or tungsten and cobalt or nickel. The presence of phosphorus oxide in the catalyst composition has been found to impart increased catalytic activity for demetallization of metal-contaminated hydrocarbon feedstocks such as heavy petroleum crudes and residua.

Abstract: A catalyst support comprised of boria and alumina is prepared by the hydrolysis of a mixture of boron alkoxide and aluminum alkoxide. The boria-alumina composition prepared in accordance with the invention can be readily formed for use as a support for catalysts useful in a number of hydrocarbon conversion processes. For example, the boria-alumina may be used as a support for various combinations of zeolite, nickel oxide and molybdenum oxide to produce a catalyst particularly useful in the hydrocracking of petroleum feedstocks.

Abstract: Previously hydroformed feedstocks are upgraded to improve their octane rating by contacting said feedstocks in the presence of hydrogen with a sulfactivated catalyst comprising a metallic hydrogenation component, such as a platinum group metal, in combination with a crystalline aluminosilicate zeolite having uniform pore openings of about 5 Angstrom units. In its more specific aspects, the catalyst further contains a Group II-B metal such as zinc.

Abstract: A catalyst support comprised of boria and alumina is prepared by the hydrolysis of a mixture of boron alkoxide and aluminum alkoxide. The boria-alumina composition prepared in accordance with the invention can be readily formed for use as a support for catalysts useful in a number of hydrocarbon conversion processes. For example, the boria-alumina may be used as a support for various combinations of zeolite, nickel oxide and molybdenum oxide to produce a catalyst particularly useful in the hydrocracking of petroleum feedstocks.