Abstract: A cracking/dewaxing process is provided with a catalyst composition prepared by the steps of (1) mulling, in the presence of water, a crystalline zeolite having less than about 1000 ppm alumina and an Alpha Value of less than about 5 with an inorganic binder, (2) forming the composition of step (1) at a pressure of from 2 to about 50 tons per square inch, (3) calcining the formed composition of step (2), (4) base exchanging the calcined composition of step (3) if it has a sodium content greater than about 0.02 wt. % in order to reduce the sodium content to less than 0.02 wt. %, and (5) calcining the product of step (4). In a particular embodiment wherein the zeolite has a ZSM-5 type structure, the cracking is selective for waxes and the process is useful for reducing the pour point of fuel oils and lubricants.

Abstract: The acid activity of a high silica content crystalline zeolite that contains framework boron is increased by hydrolyzing a portion of the boron and compositing the crystals with a binder that contains alumina.

Abstract: Feedstock comprising oxygenates is converted to product comprising hydrocarbons over catalyst having been prepared by reacting a high-silica zeolite with an acidic inorganic oxide in the presence of water.

Abstract: Feedstock comprising aromatic compounds is converted by isomerization, alkylation, disproportionation or transalkylation to product comprising aromatic compounds which differs from the feedstock over catalyst having been prepared by reacting a high-silica zeolite with an acidic inorganic oxide in the presence of water.

Abstract: Feedstock comprising C.sub.2.sup.+ olefins, C.sub.2 -C.sub.7 paraffins or a mixture thereof is converted to product comprising C.sub.5.sup.+ hydrocarbon compounds over catalyst having been prepared by reacting a high-silica zeolite with an acidic inorganic oxide in the presence of water.

Abstract: ZSM-11, ZSM-50 and zeolite beta are effective seeds for the crystallization of ZSM-5.

Abstract: Catalysts of improved strength and activity are formed by compositing a clay matrixing material with a zeolite which contains cations of a Group IB metal, preferably a monovalent metal such as silver. The presence of the cations gives the zeolite improved resistance to the high sintering temperatures necessary to confer adequate strength upon the resulting catalyst.

Abstract: Agglomerated crystalline zeolites are deagglomerated by treating the zeolite during its formation or shortly thereafter. The particles are contacted with additional basic solution when crystallization is near completion to effect deagglomeration.

Abstract: Process for the preparation of alkyl tert-alkyl ethers which comprises reacting a primary alcohol with an olefin having a double bond on a tertiary carbon atom in the presence of an acidic zeolite catalyst. Removal of any excess alcohol from the reaction product is accomplished by passing the reaction product through a bed of small pore zeolite.

Abstract: Hydrocarbon lubricating oil feedstocks are dewaxed by passing the waxy feedstock over a catalyst bed containing a mixture of medium pore zeolite and large pore zeolite catalysts havig a Constraint Index less than 2 and having hydroisomerization activity in the presence of a hydrogenation component.

Abstract: High silica-containing zeolites having substantially no acid activity are enhanced by reacting the same with a solid binder such as alumina in the presence of water. Hydrocarbon conversion utilizing said enhanced zeolites is also disclosed.

Abstract: Addition of AgHZSM-5 to conventional cracking catalysts results in a significant increase in gasoline octane without undue loss in gasoline yield. This octane increase is greater than could be achieved by adding HZSM-5.

Abstract: The hydrothermal stability of zeolites is improved by incorporating Group IB metal cations preferably Ag into the zeolite. The improved stability is useful in processes in which the zeolite is frequently exposed to water vapor at elevated temperature, for example, in processes where water is produced in the reaction or in the catalyst regeneration.

Abstract: A method of preparing a highly siliceous porous crystalline material related to the zeolite ZSM-12 having a composition, in terms of mole ratios of oxides, after dehydration, as follows:(1.0.+-.0.4)M.sub.2 /.sub.n O.multidot.Al.sub.2 O.sub.3 .multidot.(20-.infin.)SiO.sub.2,wherein M is at least one cation having a valence n, and characterized by an x-ray diffraction pattern whose values are set forth in Table 1 of the specification.

Abstract: As synthesized by conventional technique, zeolite ZSM-5 is crystallized in the presence of substantial amount of tetraalkylammonium cations, the alkyl groups of which contain 2 to 5 carbon atoms, such as, for example, tetrapropylammonium. When synthesized in the conventional way, ZSM-5 contains tetraalkylammonium cations as well as a substantial amount of sodium ions. To obtain a more catalytically active form of ZSM-5, the sodium ions must be exchanged to very low levels. By synthesizing zeolite ZSM-5 according to the present method, i.e., in the presence of a combination of an amine and a halide in the presence of a mutual solvent and with a specifically defined reaction mixture composition, ZSM-5 having different organic nitrogen-containing cations but the same crystal structure as conventionally prepared ZSM-5 is obtained. The ZSM-5 prepared in accordance herewith is very low in sodium content as synthesized and has a crystal size of from about 0.05 microns to about 20 microns.

Abstract: The acid activity of a high silica content crystalline zeolite that contains framework boron is increased by hydrolyzing a portion of the boron before compositing the crystals with a binder that contains alumina.

Abstract: Octane and total yield improvement in catalytic cracking of petroleum fractions under cracking conditions can be obtained by adding to conventional cracking catalysts small amounts of an additive catalyst comprising a class of zeolites characterized by a silica to alumina mole ratio greater than 5 and a Constraint Index of 1 to 12 wherein the zeolite additive catalyst is prepared via in-situ crystallization of preformed aggregates.

Abstract: A dual-function chlorination-condensation catalyst composition consisting essentially of (a) Deacon-type catalyst comprising cupric halide, alkaline earth halide and/or alkali metal halide, and/or rare earth metal halide and (b) crystalline aluminosilicate zeolite catalyst, such as ZSM-5 type.

Abstract: Agglomerated crystalline zeolites are deagglomerated by treating the zeolite following crystallization. At a point where crystallization is complete, a basic solution is added and/or the temperature of the reaction mass is increased by between 50.degree. and 100.degree. F. Alternatively, the crystalline zeolite is recovered and thereafter treated with a basic solution.

Abstract: The alkali metal content of zeolite ZSM-11 in its as-synthesized form is reduced by crystallizing the zeolite from a solution containing a source of benzyltrimethyl ammonium ions.