Abstract: This invention relates to a new form of crystalline material identified as having the structure of ZSM-35, to a new and useful method for synthesizing said crystalline material using 1,4-diaminocyclohexane as directing agent, and to use of said crystalline material prepared in accordance herewith as a catalyst for organic compound, e.g., hydrocarbon compound, conversion.

Abstract: A method of activating silicoaluminophosphate (SAPO) compositions by contacting as-synthesized SAPO with hydrated alumina and water, followed by heating to at least 425.degree. C., preferably in nitrogen and then air.

Abstract: An electrostatic precipitator apparatus and method which minimizes reentrainment of collected particles during their removal from the collecting electrode by use of a collecting system including concentric semi-tubes which are configurable from a position exposed to gas flow to one protected therefrom.

Abstract: A layered catalyst suited to the catalytic cracking of heavy feeds comprises a core and a shell. The shell comprises at least 5 wt % of at least 1 molecular sieve having openings of at least 8 angstroms. The core comprises at least 10 wt % of at least 1 molecular sieve having openings comprising a 12 or less-membered ring and has a reduced, if any, content of said molecular sieve having openings of at least 8 angstroms, relative to its concentration in the shell. Suitable molecular sieve materials having openings of at least 8 angstroms include MCM-41, VPI-5, MCM-9 and layered metal oxides, e.g., pillared clays. The required molecular sieve of the core can include zeolite Y, Ultrastable Y or intermediate pore size zeolites such as ZSM-5. The shell which may further contain a metals passivator can act as a metals sink, and can remove metals from the unit by attrition. The catalyst is preferably prepared by forming the core and then coating or encapsulating the core with a shell material.

Abstract: A method for isomerizing a 1-olefin-containing organic feedstock having an average carbon number of about 4 to 5, e.g., 1-butene, to convert 1-olefin to 2-olefin at temperatures less than 200.degree. C., with a double bond isomerization catalyst comprising a zeolite sorbing 30 to 55 mg n-hexane at 90.degree. C., 83 torr, and 15 to 40 mg 3-methylpentane at 90.degree. C., 90 torr, per g dry zeolite in the hydrogen form, e.g., ZSM-22, ZSM-23, or ZSM-35. Catalyst aging is minimal despite operation at low temperatures and high pressures.

Abstract: This invention relates to a method for calcining without structural alteration crystalline [metallo]aluminophosphate compositions, e.g, those comprising pores which are formed by 18-membered rings. The method comprises contacting the dried composition with an inert gas at high flow rates while heating said composition to calcining temperature at a heating rate no greater than 10.degree. C./minute. Thereafter the composition is contacted at calcining temperature with an oxygen-containing gas at high flow rates.

Abstract: A process is disclosed for the highly selective skeletal isomerization of linear olefin-containing organic feeds to iso-olefins at high levels of feed conversion wherein linear olefins, e.g., n-butenes, are contacted with catalyst comprising ZSM-22 having a crystal size whose largest dimension is no greater than 0.5 micron. The process is carried out under isomerization conditions to produce iso-olefins of corresponding carbon number, e.g., isobutene. High overall iso-olefin yields thus can be obtained, even at relatively low temperatures.

Abstract: Alkylation of aromatics, e.g. ethylbenzene preparation, with minimized o-xylene make by contacting with olefin alkylating agent in the presence of ZSM-5 crystals having a diffusion rate constant of at least about 100 sec.sup.-1 .times.10.sup.-6 and an alpha value of less than about 100 prepared from a non-organic forming mixture comprising a silica source of precipitated silica having a particle size of 1 to 500 microns.

Abstract: Crystalline compositions, e.g. zincosilicates, which contain 3-membered rings and have a framework density (FD) of less than 21 tetrahedral atoms per cubic nanometer, and their method of preparation are disclosed. The compositions may be used as ion-exchangers, adsorbents, catalysts, e.g. hydrocarbon conversion catalysts, and catalyst supports.

Abstract: A layered product comprises a layered metal oxide and pillars of an oxide of at least one element selected from Groups IB, IIB, IIIA, IIIB, IVA, IVB, VA, VB, VIA, VIIA and VIIIA of the Periodic Table of the Elements separating the layers of the metal oxide. Each layer of the metal oxide has the general formula[M.sub.x .quadrature..sub.y Z.sub.2-(x+y) O.sub.4 ].sup.q-wherein M is at least one metal of valence n wherein n is an integer between 0 and 7, .quadrature. represents a vacancy site, Z is a tetravalent metal, and whereinq=4y-x(n-4)O<x+y.sup.

Abstract: A method for enhancing the activity of a porous crystalline zeolite having a framework silica-to-alumina mole ratio of 25 or more which comprises contacting the zeolite with a solution comprising a hydrate of trivalent metal fluoride in aqueous media under conditions sufficient to cause incorporation of said metal in the framework of said zeolite.

Abstract: Crystalline metalloaluminophosphate compositions having pore windows formed by 18 tetrahedral members are prepared from a forming mixture containing sources of aluminum, phosphorus and a non-aluminum, non-phosphorus element, e.g. boron or boron and silicon. The forming mixture further contains a directing agent comprising a mixture of quaternary nitrogen compound and amine in a molar ratio of 0.01 to 0.025.

Abstract: Crystalline aluminophosphate compositions having pore windows formed by 18 tetrahedral members are prepared from a forming mixture containing sources of aluminum, phosphorus and optionally, silicon. The forming mixture further contains a directing agent comprising a mixture of quaternary nitrogen compound and amine in a molar ratio of 0.01 to 0.025. The resulting product exhibits greater stability than compositions made from amine directing agent.

Abstract: This invention relates to a new crystalline composition MCM-40, to a method for synthesizing said crystalline composition using diaminocyclohexane as a directing agent and to use of said crystalline composition as a catalyst component for organic compound, e.g. hydrocarbon compound, conversion.

Abstract: Nitrogenous compounds especially bases such as amines are used to control the operation of a hydrocracker. Catalyst activity and selectivity may be controlled by addition of the base to the feed, for example, to control the balance between isomerization and conversion in an operation using a zeolite beta catalyst. Runaway conditions may be controlled by the addition of nitrogenous compounds and if they are added at intermediate points along the length of the reactor, the temperature profile within the reactor can be effectively regulated.

Abstract: This invention relates to a method for preparing large pore synthetic crystalline molecular sieve composition which may contain framework +3 valence element, e.g. aluminum, and one or more of a) +4 valence element, e.g. silicon, and b) +5 valence element, e.g. phosphorous. The method utilizes cyclohexylamine as directing agent in the forming mixture. The source of +3 valence element and, optionally +4 element is an alkoxide thereof, e.g., aluminum iso-propoxide. The resulting product may be used as a catalyst.

Abstract: The crystallization half-time and mold cycle time of high density (>0.935 g/cm.sup.3) polyethylene are reduced and the impact energy is improved by blending two linear ethylene polymers differing in density by 0.015 to 0.150 g/cm.sup.3, to achieve a density similar to a single high density polyethylene. Both polymer components and resulting blend have a melt flow ratio (MFR) of less than 35 which indicates a relatively narrow molecular weight distribution. Articles are formed which do not show the severe warpage experienced with conventional nucleating agents, and which exhibit impact properties superior to a similar single high density polyethylene copolymer.

Abstract: There is provided a boron-containing aluminosilicate zeolite corresponding to the substantially aluminum and boron free silicate zeolite described in the Hinnenkamp et al. U.S. Pat. No. 4,376,757. Also provided are methods for making this borosilicate zeolite and methods for the catalytic conversion of organic charges to desired products with this borosilicate zeolite.

Abstract: Catalyst compositions of inorganic oxide bound shape-selective porous crystalline silicates are prepared by adding binder precursors to a porous crystalline silicate reaction mixture which contains unincorporated silica, in-situ formed porous crystalline silicate and water. The resulting compositions exhibit improved hydrothermal stability and octane enhancement as additives in catalytic cracking.

Abstract: Organic compound conversion over catalyst comprising the product of a method for controlling the catalytic activity of a large pore molecular sieve which contains framework boron is provided. Control is effected by treatment with a solution of a metal salt under conditions such that metal is incorporated into the molecular sieve framework.