摘要:
A process for the production of diesel fuel with a high cetane number at a low cloud point, which involves hydrocracking highly aromatic fractions obtained from catalytic cracking operations. The fraction of hydrocracker effluent which boils between about 400.degree. F. (205.degree. C.) and 1000.degree. F. (538.degree. C.) is subsequently catalytically dewaxed in order to obtain a cloud point of no more than 41.degree. F. (5.degree. C.). The hydrocracker effluent fraction is preferably recycled to the hydrocracking step prior to dewaxing.
摘要:
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 an acidic solid material which comprises a Group IVB metal oxide, such as zirconia, modified with an oxyanion of a Group VIB metal, such as tungsten.
摘要:
A process for the conversion of toluene to xylenes by alkylation with methanol over an acidic solid catalyst with a Group IVB metal oxide modified with an oxyanion of a Group VIB metal.
摘要:
The present invention relates to a catalyst and its use in a process for the conversion of ethene to a product rich in linear butenes, especially 2-butene, comprising contacting a feedstock comprising ethene under dimerization conditions with a catalyst composition comprising a porous crystalline silicate having the structure of ZSM-35 which has been treated by a) fluoriding, e.g., with NH.sub.4 F, and then b) at least partially surface deactivated for acid catalyzed reactions by chemisorption of a surface-deactivating agent which possesses an average cross section diameter greater than that of the zeolite pores, e.g., collidine.
摘要:
There is provided a process for ring opening of aromatics or cycloaliphatics, as well as isomerization of aliphatics. The feedstream to this process comprises hydrocarbons having 6 carbon atoms. The process involves the use of a recycle stream containing a source of chlorine, such as carbon tetrachloride, and this process involves the use of at least two reactors connected in series. The first reactor comprises a ring opening catalyst and is operated under conditions which particularly promote ring opening. The catalyst in this first reactor may comprise zirconia modified with tungstate and platinum. A second, downstream reactor is operated under conditions to promote isomerization of aliphatics. The catalyst in the second reactor may comprise alumina, platinum and a chloride component. The catalysts in both the first and second reactors are chlorine resistant.
摘要:
There is provided a process for the partial oxidation of methane to produce a product including carbon monoxide and hydrogen. The process involves contacting a source of methane and a source of oxygen with a perovskite catalyst, such as LaCoO.sub.3.
摘要:
Low acidity refractory oxide-bound zeolite catalysts, for example, silica-bound ultrastable Y zeolite, possessing physical properties, e.g., crush strength, similar to those of their alumina-bound counterparts are described. Since low acidity refractory oxide-bound catalysts are inherently less active than alumina-bound zeolite catalysts, the former are particularly useful in hydrocarbon conversion processes in which reduced coke make increases catalyst cycle length. Due to their stability in acid environments, the low acidity refractory oxide-bound zeolite extrudate herein can be acid treated without unduly compromising its structural integrity.
摘要:
There is provided a process for the direct partial oxidation of methane with oxygen, whereby organic compounds comprising higher hydrocarbons are produced. The catalyst used in this reaction is a GaZSM-5 catalyst. This catalyst may be prepared by ion exchanging or impregnating a ZSM-5 catalyst with a suitable gallium salt such as gallium nitrate.
摘要:
There is provided a process for converting methane to higher molecular weight hydrocarbons. In a first step, methane is contacted with carbonyl sulfide in the presence of UV light under conditions sufficient to produce CH.sub.3 SH. This CH.sub.3 SH then contacted with a sufficient catalyst, such as a zeolite, especially ZSM-5, under conditions sufficient to produce hydrocarbons having two or more carbon atoms.
摘要:
A method for increasing ion exchange capacity of a titanosilicate comprises contacting the titanosilicate with aqueous alkaline solution having a pH ranging from 7 to 10. The resulting material is especially useful as a support for highly dispersed noble metal.