Abstract: A silicoaluminophosphate molecular sieve is disclosed and is characterized in that the P.sub.2 O.sub.5 to alumina mole ratio at the surface is about 0.80 or less, the P.sub.2 O.sub.5 to alumina mole ratio of the bulk is 0.96 or greater and the silicon content at the surface is greater than that of the bulk. Also described is the use of the silicoaluminophosphate molecular sieve in hydrocarbon conversion processes.
Abstract: The present invention relates to a process for producing a C.sub.20 + lube oil from olefins or reducing the pour point of a lube oil comprising isomerizing the olefins over a catalyst comprising an intermediate pore size silicoaluminophosphate molecular sieve and at least one Group VIII metal.
Abstract: Heavy oils containing metal contaminants are hydrodesulfurized in a reactor containing a series of fixed beds of catalyst. The catalyst particles become caked together during the hydrodesulfurization process, possibly due to formation of metal sulfides and carbonaceous deposits, and the caked catalyst is removed by a hydro drilling method. The hydro drilling is preferably commenced by drilling a central opening through the catalyst beds. The catalyst particles and chunks are cut from the bed and removed from the reactor vessel through catalyst dump openings at the bottom of the vessel. Preferably, the dump openings are maintained open by hydro lancing as the cutting of catalysts in the upper part of the vessel loosens the catalyst so that the catalyst will drop down the central opening and thus out through the catalyst dump openings at the bottom of the reactor vessel.
Abstract: For a heavy hydrocarbonaceous feed, especially good hydrodemetalation and hydrodesulfurization are achieved, as well as MCR reduction, using a catalyst having 5 to 11 percent of its pore volume in the form of macropores, and a surface area greater than 75 m.sup.2 /g. Preferably the catalyst has a peak mesopore diameter greater than 165 .ANG., as determined by mercury porosimetry, and an average mesopore diameter greater than 160 .ANG..
Abstract: A uniform feed distribution system for selectively upgrading a feed stream of hydrocarbon fluid containing metallic components, such as organometallic compounds, and/or inert materials, which deactivate or contaminate catalyst particles counterflows into a descending bed of catalyst particles. The heated feed stream is at temperatures and pressures so that lighter hydrocarbon components or hydrogen evolve as gas components as it is introduced into the reaction vessel. The evolved gas is separated into reservoir or pocket above a reservoir of liquid components and both components are then uniformly and selectively introduced into the downflowing bed of catalyst. By forming a common supply volume of gaseous and liquid components, the gas components are independently accessible to the lower end of the moving bed of catalyst particles through an inclined distribution surface preferably in the form of a cone.
Abstract: A silicoaluminophosphate molecular sieve is disclosed and is characterized in that the P.sub.2 O.sub.5 to alumina mole ratio at the surface is about 0.80 or less, the P.sub.2 O.sub.5 to alumina mole ratio of the bulk is 0.96 or greater and the silicon content at the surface is greater than that of the bulk.
Abstract: A process is disclosed for the removal of iron from hydrocarbonaceous feedstock comprising passing the feedstock over inert, fibrous material in the presence of sulfur to induce the deposition of iron sulfide on the fibrous material through autocatalytic homoepitaxy.
Abstract: A process is disclosed for removing hydrocarbons from oily wastes. According to the process, the oily wastes are mixed with solids and a binder and then granulated. The granules thus formed are contacted with solvent to extract hydrocarbons from the granules. Preferred solids include limestone and preferred binders include portland cement calcium sulfate and/or calcium sulfate hydrate such as plaster of Paris.
Abstract: A process is disclosed to extract metal values selected from the group consisting of cobalt, molybdenum, nickel, tungsten, and vanadium from metal-containing particles, such as spent hydroprocessing catalyst particles containing carbon residue. In this process, the spent catalyst particles are roasted in an oxygen-containing gas at a temperature of from 400.degree. C. to 600.degree. C., and then the roasted catalyst particles are contacted with an aqueous solution of ammonia, ammonium salt, and hydrogen peroxide. That aqueous solution has an initial pH of at least 9.5 and an initial hydrogen peroxide concentration of from 0.02 to 0.2 M. That aqueous solution is maintained at a pH of greater than 9.5.
Abstract: A process for removing residual sulfur from a hydrotreated naphtha feedstock is disclosed. The feedstock is contacted with molecular hydrogen under reforming conditions in the presence of a less sulfur sensitive reforming catalyst, thereby converting trace sulfur compounds to H.sub.2 S, and forming a first effluent. The first effluent is contacted with a solid sulfur sorbent, removing the H.sub.2 S and forming a second effluent. The second effluent is contacted with a highly selective reforming catalyst under severe reforming conditions.
March 10, 1988
Date of Patent:
May 15, 1990
Chevron Research Company
Richard C. Robinson, Robert L. Jacobson, Leslie A. Field
Abstract: Lubricating oils are prepared by a process whereby a hydrocarbonaceous feedstock is hydrocracked and subsequently dewaxed over a crystalline silicoaluminophosphate SAPO-11 containing platinum and/or palladium.
Abstract: A crystalline zeolite SSZ-26 is prepared using a hexamethyl [22.214.171.124] propellane-8,11-diammonium cation as a template. Also disclosed is a process for converting hydrocarbons with crystalline zeolite SSZ-26.
March 23, 1988
Date of Patent:
March 20, 1990
Chevron Research Company
Stacey I. Zones, Donald S. Santilli, James N. Ziemer, Dennis L. Holtermann, Theresa A. Pecoraro, Robert A. Innes
Abstract: This invention relates to the preparation of small spheroidal solid agglomerates. More particularly, the process produces strong solid spheroidal agglomerates containing alumina or a mixture of alumina and at least one other inorganic material, which process comprises:(a) mixing at high speed a portion of alumina or a mixture of alumina and at least one other inorganic material in the form of hydrophilic mircon-sized particles in a water-immiscible liquid thereby forming a dispersion;(b) gradually adding to the dispersion an aqueous acidic phase while continuing the high-speed mixing until substantially spherical micro-agglomerates form within the water-immiscible liquid;(c) subjecting the micro-agglomerates to agitation in a vessel having a hydrophobic inner surface at a speed low enough to achieve substantially uniformly sized spheroidal agglomerates;(d) drying the agglomerates to produce hardened spheroidal uniformly sized agglomerates; and(e) optionally further separating the agglomerates by size.