Abstract:
Synthesis gas, a mixture comprising carbon monoxide and hydrogen, is converted to a product comprising methanol and unreacted carbon monoxide, possibly with hydrogen; the mixture is partially converted by carbonylation to a mixture comprising acetic acid, methanol and methyl acetate; and this mixture is converted to a hydrocarbon product rich in aromatic hydrocarbons by use of a high silica to alumina ratio, limited constraint index, zeolite such as a ZSM-5 zeolite.
Abstract:
A process for hydrocracking heavy, high aromatic content feeds, such as cycle oil, using a catalyst composition containing a hydrogenation/dehydrogenation component, such as a noble metal, and an acidic solid component including a Group IVB metal oxide modified with an oxyanion of a Group VIB metal.
Abstract:
A novel synthesis composition of a solid acid containing zirconium, in addition to a rare earth element, such as cerium, has the potential for catalytic conversions of hydrocarbons, especially for isomerization of paraffins, ring opening of cyclics, hydrocracking, alkylation, hydrogenation of polynuclear aromatics, selective catalytic reduction of nitrogen oxides, and oligomerization of light olefins.
Abstract:
There is provided a catalytic oligomerization process. The process involves the use of a catalyst comprising an acidic solid. The acidic solid may comprise a Group IVB metal oxide, such as zirconia, modified with an oxyanion of a Group VIB metal, such as tungsten. The oligomers produced by this process may be hydrogenated to produce thermally stable lubricants and lubricant additives, gasoline and diesel.
Abstract:
A process for hydrotreating a hydrocarbon feedstock, such as light cycle oil, using a catalyst composition containing a hydrogenation/dehydrogenation component and an acidic solid component including a Group IVB metal oxide modified with an oxyanion of a Group VIB metal. The hydrotreating process removes contaminants, such as sulfur and/or nitrogen, from the feedstock.
Abstract:
There is provided a method for selectivating a zeolite, such as ZSM-5 which may result in functionalization of the zeolite with at least one organosiliceous group of the formula, SiR.sub.n (OX).sub.4-n, where R is at least one hydrocarbyl group, n is 1 or 2 and X is Si or H. This selectivation method involves vapor phase treatment of a zeolite with an organosilicon compound having at least 2 silicon atoms. This organosilicon compound may be a silicone compound, such as hexamethyldisiloxane, or a silane compound such as hexamethyldisilane. This contacting may take place in the presence of hydrogen and an organic carrier. The functionalized zeolites may provide a catalyst which is both highly active and highly selective for converting aromatic hydrocarbons, especially alkylbenzene compounds, to products comprising the para-isomer of dialkylbenzenes. The disproportionation of toluene is an example of such a reaction.
Abstract:
A process and catalyst for Shape Selective Hydrocarbon Conversions such as the regioselective disproportionation of toluene to para-xylene wherein hydrocarbon to be converted is passed over a catalytic molecular sieve which is trim selectivated with a reaction stream comprising toluene and a silicon-containing high efficiency p-xylene selectivating agent under toluene conversion conditions. The toluene disproportionation process attains a single-pass para-xylene product over 95% coupled with a toluene conversion of at least 15%. The present invention also includes the highly para-selective catalyst which results from the treatment of a catalytic molecular sieve with a high efficiency p-xylene selectivating agent under the recited conditions.
Abstract:
Relatively short chain alkyl aromatic compounds are prepared by alkylating or transalkylating an alkylatable aromatic compound with a relatively short chain alkylating or transalkylating agent under sufficient reaction conditions in the presence of catalyst comprising zeolite MCM-49.
Abstract:
The present invention provides a process for producing a selected paraffin from a reaction mixture containing(i) an acceptor olefin having the carbon backbone structure of said selected paraffin;(ii) a donor paraffin having a carbon backbone structure different from that of said selected paraffin;(iii) less than about 10 mole percent molecular hydrogen; which process comprises the steps of contacting said reaction mixture with a heterogeneous catalyst comprising active carbon in the absence of an added catalytic metal or metal compound to convert at least a portion of said acceptor olefin to said selected paraffin and to dehydrogenate at least a portion of said donor paraffin.