摘要:
Molecular sieves comprising (1) phosphorus oxide; (2) a first oxide comprising an oxide of silicon, germanium or mixtures thereof; and (3) a second oxide comprising an oxide of aluminum, boron or mixtures thereof, said molecular sieve having a mole ratio of the first oxide to the second oxide of greater than 1, containing at least about 10 weight percent phosphorus oxide in the crystal framework, and having pores greater than 5 Å in diameter are useful as catalysts in hydrocarbon conversion reactions.
摘要:
The invention includes a method for skeletal isomerization of C.sub.4-5 olefins. The method includes contacting in a FCC zone, at FCC conditions, an n-C.sub.4-5 olefins-containing etherification zone raffinate, with an FCC catalyst, where at least a portion of the n-C.sub.4-5 olefins in the n-C.sub.4-5 olefins-containing etherification zone raffinate are converted to iso-C.sub.4-5 olefins.
摘要:
A C.sub.4 and/or C.sub.5 normal olefin isomerization process using a catalyst which contains SM-3 produces high yields of C.sub.4 and/or C.sub.5 iso-olefins.
摘要:
Light paraffinic hydrocarbons are catalytically dehydrogenated using a dehydrogenation catalyst and a polymer-porous solid composite membrane capable of separating hydrogen from the effluent of the dehydrogenation reaction. The polymer-porous solid composite membrane may be, e.g., a porous ceramic material coated with a fluorinated dianhydride-diamine, a fluorinated polycarbonate or fluorinated polysulfone.
摘要:
A method is provided of selecting operating parameters for a reforming process having at least penultimate and final reforming stages, each containing a respective catalyst, for optimum OB/CD production of product reformate having a selected RON and/or over a particular run length. The catalyst lives are determined at constant LHSV for the penultimate and final stage catalysts for a give feed octane to each stage as a function of the change in RON from that of the feed to that of the C.sub.5 + effluent from the respective stage. The penultimate stage C.sub.5 + effluent RON is selected to be such that the lives of the catalysts in each stage are substantially equal. Preferably the yield of C.sub.5 + effluent from each stage and the life of the catalyst used in each stage is determined as a function of the reforming pressure of that stage. The operating pressures of the stages are then selected to be within about 30% of that which gives the highest OB/CD.
摘要:
A process is provided for catalytic reforming or dehydrocyclization of hydrocarbons using a catalyst comprising a noble metal, and an intermediate pore size crystalline silicate having a high silica to alumina ratio and a relatively low alkali content. Preferably, the crystalline silicate is in the form of small crystallite size, such as less than 5 microns. The reforming or dehydrocyclization process is sulfur tolerant so that the reforming can be carried out in the presence of sulfur or with periodic exposure to sulfur.
摘要:
The present invention relates to a process for catalytically dewaxing a hydrocarbon oil feedstock by contacting the feedstock with a combination of a catalyst comprising an intermediate pore size silicoaluminophosphate molecular sieve and a hydrogenation component and an intermediate pore size aluminosilicate zeolite catalyst.
摘要:
The present invention relates to a hydrocracking and isomerization process for preparing low pour point middle distillate hydrocarbons and lube oil from a hydrocarbonaceous feedstock boiling above about 600.degree. F. by contacting the feedstock with a catalyst containing an intermediate pore size silicoaluminophosphate molecular sieve and a hydrogenation component.
摘要:
The present invention relates to a process for producing a lube oil having a low pour point and excellent viscosity and viscosity index comprising isomerizing a waxy feed over a catalyst comprising a molecular sieve having generally oval 1-D pores having a minor axis between about 4.2 .ANG. and about 4.8 .ANG. and a major axis between about 5.4 .ANG. and about 7.0 .ANG. and at least one group VIII metal. SAPO-11, SAPO-31, SAPO-41, ZSM-22, ZSM-23 and ZSM-35 are examples of useful catalysts.
摘要:
An improved nickel-tin hydrogenation catalyst additionally comprising palladium provides a highly active catalyst more easily activated than conventional nickel hydrogenation catalysts, and a process employing the improved catalyst to stabilize lubricating oils to ultraviolet radiation is disclosed.