摘要:
An improved moving bed continuous catalytic cracking process for cracking hydrocarbon feedstocks, such as gas oil, in the absence of added hydrogen, which includes the use of a minute amount of dispersed platinum supported directly on a cracking catalyst. The trace of platinum induces a substantial increase in the heat efficiency with which coke on catalyst is converted to CO.sub.2 in the regenerator section with minimal or no detriment to the cracking reaction.
摘要:
Non-hydrogenative endothermic catalytic cracking of hydrocarbon, particularly petroleum, fractions at relatively low pressures and high temperatures in a system where the endothermic heat required for cracking is supplied by catalyst as the heat transfer medium, which catalyst has been heated by burning coke deposited on the catalyst during cracking; and wherein a decomposable compound of platinum, palladium, ruthenium, iridium, osmium, rhodium or rhenium, is introduced into contact with the cracking catalyst during said process.
摘要:
A catalytic process for cracking of gas oil is disclosed, wherein trace amounts of metals of Periods 5 and 6 of Group VIII or rhenium is added to the total catalyst inventory so as to enhance significant conversion of the CO in the regenerator while maintaining the efficiency of the cracking reaction at high levels.
摘要:
A surface-inactive shape selective metallosilicate catalyst, useful for the conversion of lower molecular weight olefins to liquid hydrocarbons such as gasoline, distillate, and high viscosity lube oils, is prepared by forming a silica shell on a medium pore metallosilicate core by crystallizing silica in the presence of fluoride ion onto the surface of the core.A novel catalyst composition is provided comprising an inner core portion and an outer portion disposed as a porous shell around the inner portion, wherein the inner portion consists essentially of metallosilicate zeolite having a medium pore structure, such as ZSM-5 or ZSM-23, and the outer portion comprising a fluoride-containing crystalline shell consisting essentially of silica substantially free of acid sites and having substantially the same crystalline structure as the inner core portion.
摘要:
An improved process for the production of high viscosity lubricating oils obtained by reacting olefins over ZSM-5 type zeolites at elevated temperatures and pressures in order to obtain a liquid product and thereafter recovering a lube oil fraction from said liquid product is disclosed. The improvement resides in the use of large crystal ZSM-5 which has been found to enhance the viscosity index of lubes produced from olefins.
摘要:
A method is disclosed for the conversion of synthesis gas to a liquid hydrocarbon product having a boiling range of less than 400.degree. F. at a 90% overhead utilizing a novel catalyst prepared from finely divided iron powder or iron oxide. The novel method involves contacting synthesis gas with a single particle catalyst containing iron, a crystalline acidic aluminosilicate zeolite having a silica-to-alumina ratio of at least 12, a pore size greater than about 5 Angstrom units, and a constraint index of about 1 to 12, and a matrix. The catalyst does not contain promoters.
摘要:
Operation of regenerators of commercial equipment for catalytic cracking of hydrocarbon feedstock, such as gas oil, in the absence of added hydrogen is improved considerably by use of a cracking catalyst which contains a minute amount, as low as fractions of a part per million (ppm), of a metal from periods 5 and 6 of Group VIII of the Periodic Table or rhenium. These powerful dehydrogenation metals, in the amounts here used, do not have serious adverse effect on the cracking operation and reduce CO content of flue gases from the regenerator to negligible amounts.
摘要:
The operation of a fluid catalytic cracking unit having a regenerator designed to completely combust carbon monoxide to carbon dioxide thermally is improved by circulating a trace amount of at least one metal of the group consisting of platinum, palladium, iridium, osmium, rhodium, ruthenium and rhenium with the circulating inventory of solid acidic cracking catalyst.
摘要:
A process for increasing the volume of feed throughput to the FCC by decreasing coke make under catalytic cracking conditions including a temperature of 950.degree. F. to about 1150.degree. F., a catalyst to feed ratio of 3:1 to 10:1 and a catalyst contact time of from about 1 to about 20 seconds in the presence of catalyst comprising framework silicon enriched ZSM-20.
摘要:
A surface-inactive shape selective metallosilicate catalyst, useful for the conversion of lower molecular weight olefins to liquid hydrocarbons such as gasoline, distillate, and high viscosity lube oils, is prepared by a process comprising forming a silica shell on a metallosilicate core by crystallizing silica in the presence of fluoride ion onto the surface of the core.