Abstract: This disclosure is concerned with the crystallization of ZSM-5 zeolites and, more particularly, is concerned with the preparation of high silica ZSM-5 zeolites having a silica-to-alumina ratio of greater than 70, up to and approaching infinity, by control of the pH so as to obtain rod-shaped crystals.

Abstract: Layered silicate materials of high thermal stability and surface area which contain interspathic oxides such as silica as prepared by treating a layered silicate, with organic cation, to spread the layers apart. A compound such as tetraethylorthosilicate, capable of forming said oxide, is thereafter introduced between the layers. The resulting product is treated to form the oxide, e.g. by hydrolysis, to produce the layered silicate material. The resulting product may be employed as a catalyst material in the conversion of hydrocarbons.

Abstract: A method for preparing a hydride containing at least two different Group 4A atoms wherein at least one of the Group 4A atoms is silicon or germanium. The method includes the steps of reacting an alkali metal and a macrocyclic compound with a silicon or germanium hydride to form a salt. The salt is then reacted with a Group 4A halide. The resulting hydrides are useful as deposition feedstock material for use in the formation of hydrogenated amorphous silicon alloy in the fabrication of photovoltaic devices and other semiconductor devices.

Abstract: Mullite of high purity is obtained by neutralizing an aqueous solution containing a basic aluminum salt and colloidal silica thereby causing formation of a precipitate in the aqueous solution, and subsequently heating the precipitate.

Abstract: A process for the hydrothermal production of clear sodium silicate solutions by reacting sand and aqueous NaOH solution wherein an excess of 5 to 10% by weight of sand is used and the reaction is conducted in a rotating pressure vessel until 90 to 95% complete, after which it is transferred and completes in a blow-off vessel.

Abstract: Arsenic acid is formed from arsenous acid and water under oxygen pressure with catalytic amounts of nitric acid and a halide whereby the nitric oxide by-product is regenerated to nitric acid for contact with fresh arsenous acid.

Abstract: A process for preparing a zeolite, e.g. ZSM-5, under controlled conditions of initial pH adjustment with an acid, SiO.sub.2 /Al.sub.2 O.sub.3 mole ratio, and in the presence of sodium cations, is disclosed, as well as a process for using the same to synthesize olefins from methanol and/or dimethyl ether.

Abstract: A synthetic zeolite material, designated zeolite Nu-13, is a member of the ZSM-12 family of zeolites and is prepared from an aqueous reaction mixture containing the oxide XO.sub.2, the oxide Y.sub.2 O.sub.3 and a piperazine compound where X is silicon or germanium and Y is aluminium, gallium, boron, iron, chromium, vanadium, molybdenum, arsenic, antimony or manganese.

Abstract: Zeolite EU-2 having a molar composition expressed by the formula:0.5 to 1.5 R.sub.2 O:Y.sub.2 O.sub.3 : at least 70 XO.sub.2 :0 to 100 H.sub.2 Owherein R is a monovalent cation or 1/n of a cation of valency n, X is silicon and/or germanium, Y is one or more of aluminium, iron, gallium or boron, and H.sub.2 O is water of hydration additional to water notionally present when R is H, and having an X-ray pattern substantially as set out in Table 1 is prepared from a reaction mixture containing XO.sub.2 (preferably silica), Y.sub.2 O.sub.3 (preferably alumina) and a dicationic alkylated polymethylene diamine. The zeolite is useful in catalytic processes, especially for the conversion of methanol to hydrocarbons.

Abstract: Templating compounds of the formula:(HO--C.sub.2 H.sub.4).sub.3 N.sup..sym. --(CH.sub.2).sub.n -N.sup..sym. (C.sub.2 H.sub.4 --OH).sub.3 2 Br.sup..crclbar.wherein n equals 3, 4 or 5 are produced by reacting triethanolamine with .alpha., .omega.dibromoalkanes, for example in the presence of a solvent. One can also react dibromoalkane with the triethanolamine in dropwise manner at reaction temperature. The product is subsequently recovered by known methods. The templating compositions can be used for the preparation of the zeolites of the pentasil types. These zeolites have the composition represented by the summary formula:(0.4-0.7)Na.sub.2 O/(0.3-0.6)Q.sub.2 O/Al.sub.2 O.sub.3 /(30-80)SiO.sub.2 /(4-10)H.sub.2 Oand have the following X-ray diffraction pattern:______________________________________ d .ANG. I/Io ______________________________________ 11.0 .+-. 0.2 30-70 10.0 .+-. 0.2 30-80 4.4 .+-. 0.1 10-20 4.3 .+-. 0.1 10-20 3.85 .+-. 0.05 100 3.74 .+-. 0.05 40-65 3.66 .+-. 0.05 20-40 3.43 .+-. 0.03 15-25 2.

Abstract: A new crystalline borosilicate molecular sieve, boronaaronate, having a composition in terms of mole ratios of oxides:0.9.+-.0.2M.sub.2/n O:B.sub.2 O.sub.3 :ySiO.sub.2 :zH.sub.2 Owherein M is a cation of valence n, y is between 2 and about 700, and z is between 0 and about 200, and having a characteristic X-ray diffraction pattern. The boronaaronate is prepared by reacting under crystallization conditions, in substantial absence of a metal hydroxide, an aqueous mixture containing an oxide of silicon, an oxide of boron, ethylenediamine, and an organic material comprised of a heterocyclic nitrogen-containing aromatic compound or an aliphatic alcohol. Boronaaronate is useful in hydrocarbon conversion processes.

Abstract: A crystalline zeolite may be prepared which has a composition, in terms of mole ratios of oxides, in the range:1.0 to 1.3 Na.sub.2 O:Al.sub.2 O.sub.3 :2.1 to 8.0 SiO.sub.2and having a cancrinite-like structure in which the twelveing channel thereof is not blocked by, for example, salt molecules. The preferred compositions are of the formula:1.1 to 1.3 Na.sub.2 O:Al.sub.2 O.sub.3 :2.4 to 3.1 SiO.sub.2This zeolite may be prepared from crystallization of an aged reaction mixture containing aqueous ammonia, a source of silica, a source of alumina and sodium hydroxide.

Abstract: An aluminosilicate characterized by having a faujasite structure, a silica to alumina mole ratio of at least six and bis-(2-hydroxyethyl)-dimethylammonium ions or other large tetra alkyl or hydroxy alkyl ammonium ions within the large cages of the aluminosilicate. This composition may be prepared by crystallization from an aged reaction mixture to an oxide of sodium, a tetra alkyl or hydroxy alkyl ammonium salt, water, a source of silica, a source of alumina and sodium aluminosilicate nucleating seeds in specified relative amounts.

Abstract: A process for preparing rhombohedral system boron nitride, which comprises mixing NaBH.sub.4 with at least an equimolar amount of NH.sub.4 Cl, and heating the resulting mixture in a non-oxidizing atmosphere at a temperature of at least 750.degree. C. and lower than 1000.degree. C. for at least 3 hours.

Abstract: Crystalline metallophosphoaluminates are prepared by hydrothermal crystallization utilizing a reaction mixture containing a substantially water-immiscible organic solvent wherein one of the aluminum, phosphorus or oxide sources is soluble in the organic solvent.

Abstract: Crystalline zeolitic aluminosilicates having at least some of its original framework aluminum atoms replaced by extraneous silicon atoms and having a mole ratio of oxides in the dehydrated state of(0.85-1.1)M.sub.2/n O:Al.sub.2 O.sub.3 :xSiO.sub.2wherein M is a cation having a valence of "n"; "x" has a value greater than 6.0; has a x-ray powder diffraction pattern having at least the d-spacings of Table A; and has extraneous silicon atoms in the crystal lattice in the form of framework SiO.sub.4 tetrahedra. The novel zeolite aluminosilicates are employed in hydrocarbon conversion processes.

Abstract: A crystalline ironborosilicate comprises a molecular sieve material having the following composition in terms of mole ratios of oxides1.0.+-.0.3 M.sub.n/2 O; (a Fe.sub.2 O.sub.3 :b B.sub.2 O.sub.3):y SiO.sub.2.z H.sub.2 Owherein M is at least one cation having a valence n, a is greater than zero but less than 1, b is greater than zero but less than 1 such that a+b=1, y is a value of at least 6, and z is a value within the range of 0 to about 500 and giving a specific X-Ray diffraction pattern. The crystalline ironborosilicate is used to catalyze various processes such as the conversion of simple alcohols to high-octane gasoline, and the catalytic hydrogenation of carbon monoxide for the production of high-octane liquid hydrocarbons. The preparation of the ironborosilicate is also disclosed.

Abstract: Titanium-aluminum-silicon-oxide molecular sieves are disclosed having use as molecular sieves and as catalyst compositions in hydrocarbon conversion and other processes. The molecular sieves have a unit empirical formula on an anhydrous basis ofmR: (Ti.sub.x Al.sub.y Si.sub.z)O.sub.2wherein "R" represents at least one organic+emplating agent; "m" represents the moles of "R" present per mole of (Ti.sub.x Al.sub.y Si.sub.z)O.sub.2 ; and "x", "y" and "z" represent the mole fractions of titanium, aluminum and silicon, respectively, present as tetrahedral oxides.

Abstract: A new zeolite material designated EU-13 has a molar composition expressed by the formula:0.8 to 3.0 R.sub.2 O: Y.sub.2 O.sub.3 : at least 10 XO.sub.2 : 0 to 2000 H.sub.2wherein R is a monovalent cation or (1/n) of a cation of valency n, X is silicon and/or germanium, Y is one or more of aluminium, iron, chromium, vanadium, molybdenum, arsenic, antimony, manganese, gallium or boron and H.sub.2 O is water of hydration additional to water notionally present when R is H, and having an X-ray powder diffraction pattern substantially as set out in Table 1. The zeolite material is prepared from a reaction mixture containing XO.sub.2 (preferably silica), Y.sub.2 O.sub.3 (preferably alumina) and a methylated quaternary ammonium or phosphonium compound, most preferably a tetramethylammonium compound.

Abstract: This a very simple process for making boron nitride by mixing sodium cyanide and boron phosphate and heating the mixture in an inert atmosphere until a reaction takes place. The product is a white powder of boron nitride that can be used in applications that require compounds that are stable at high temperatures and that exhibit high electrical resistance.