Abstract: Dimethylamine is prepared from a reaction of methanol with ammonia or monomethylamine or a disproportionation reaction of monomethylamine, in the presence of a catalyst of silica-modified crystalline silicoaluminophosphate molecular sieve or silica-modified SAPO.

Abstract: The invention concerns a catalyst for hydrorefining and hydroconverting hydrocarbon feeds, comprising a mixed sulphide comprising at least two elements selected from elements with an atomic number selected from the group formed by the following numbers: 3, 11, 12, 19 to 33, 37, to 51, 55 to 83, 87 to 103, characterized in that the mixed sulphide results from a combination of at least one element the sulphide of which has a bond energy between the metal and sulphur of less than 50.+-.3 kcal/mol (209.+-.12 kJ/mol) and at least one element the sulphide of which has a bond energy between the metal and sulphur of more than 50.+-.3 kcal/mol (209.+-.12 kJ/mol), the mixed sulphide thus having a mean bond energy between the metal and sulphur which is in the range 30 to 70 kcal/mol (125 to 293 kJ/mol).

Abstract: Microporous crystalline metallophosphate composition having an essential framework structure identified by the characteristic X-ray powder diffraction reflections given in Table I, and whose chemical composition in the calcined anhydrous form expressed in terms of mole ratios of oxides is: (M.sub.x Al.sub.y P.sub.z)O.sub.2 where M is silicon, x+y+z=1, and where x, y and z represent the mole fractions of silicon, aluminium and phosphorous present in the product, and where x may have a value from 0 to 0.5, y may have a value from 0.25 to 0.5 and z may have a value from 0.25 to 0.5. The invention also describes a method for preparing the products from a reaction mixture which includes both monovalent cations and fluoride.

Abstract: An amorphous aluminophosphate composition is provided which exhibits a microstructure of sheets and spheres of silica-modified aluminophosphate. Also provided is a method for preparing the composition comprising mixing an aqueous solution containing aluminum ions, phosphate ions and silica ions, with a neutralizing solution, wherein the mixing is conducted with sufficient shear to produce on a microlevel, sheets of silica-modified aluminophosphate and spheres of silica-modified aluminophosphate. A polymerization catalyst and a polymerization process are also provided.

Abstract: The invention provides a method for preparing catalysts, containing metals of groups VI and VIII on a carrier. The metals of groups VI and VIII metals are introduced in the form of a compound of formula M.sub.x A B.sub.12 O.sub.40 in which M is cobalt and/or nickel, A is phosphorus, silicon and/or boron, B is molybdenum and/or tungsten and x is 2 or more, 2.5 or more, or 3 or more depending on whether A is respectively phosphorus, silicon or boron. The catalysts thus obtained are useful for hydro-treating hydrocarbon feedstocks.

Abstract: A catalyst composition, a process for producing the composition, and a hydrotreating process for converting a hydrocarbon stream such as, for example, gasoline, to olefins and C.sub.6 to C.sub.8 aromatic hydrocarbons such as toluene and xylenes are disclosed. The catalyst composition comprises a zeolite and a promoter. The process for producing the composition comprises the steps: (1) combining a zeolite with a promoter under a condition sufficient to incorporate the zeolite with the promoter to produce a first promoted zeolite; (2) incorporating the first promoted zeolite with a second promoter to produce a second promoted zeolite; and (3) heating the second promoted zeolite. The hydrotreating process comprises contacting a hydrocarbon stream with the catalyst composition under a condition sufficient to effect the conversion of a hydrocarbon to an olefin and a C.sub.6 to C.sub.8 aromatic hydrocarbon.

Abstract: Process for the manufacture of a support containing silica and at least one constituent chosen from alumina and aluminum phosphate, according to which an alcohol, water, a silicon alkoxide and an acid are mixed under conditions such that gelling or precipitation of silica is prevented, an acidic solution of an aluminum compound and/or a solution of a source of phosphate ions are added thereto, a gelling agent is added thereto, a gel is recovered which is washed with water and then by means of an organic liquid, the gel is then dried by atomization until a powder is obtained, and the powder is calcined. Polymerization of olefins in the presence of a catalyst containing chromium on a support as described above.

Abstract: The present invention provides a molecular sieve composite membrane, which includes an anodic alumina membrane as a support and the uni-directionally oriented molecular sieve membrane grown in situ on the anodic alumina membrane. The close packing transitional metal containing aluminophosphate AFI molecular sieve crystals have successfully been grown on the anodic alumina. The molecular sieve phase bounded strongly and anchored into the anodic alumina membrane. Besides, the specific cylindrical channels of the anodic alumina membrane provides the template function to orient the growth of molecular sieves.

Abstract: A catalyst system comprising a nitrided silicoaluminophosphate, and a method of preparing such catalyst system which comprises nitriding a silicoaluminophosphate, are disclosed. The thus-obtained catalyst system is employed as a catalyst in the conversion of a hydrocarbon feedstock comprising oxygenated hydrocarbons to olefins.

Abstract: A catalyst composition for use in the preparation of an organopolysiloxane comprises a .gamma.-butyrolactone carrier and a phosphonitrile catalyst. Preferred phosphonitrile catalysts comprise Cl.sub.3 PNPCl.sub.2 NPCl.sub.3.PCl.sub.6, (Cl.sub.3 P.dbd.N--(PCl.sub.2 .dbd.N).sub.d --PCl.sub.3).sup.+ (SbCl.sub.6).sup.- wherein d is 1 to 4, and compounds of the formula Y(PX.sub.2 .dbd.N).sub.a PX.sub.2 O) wherein X is chlorine, hydroxyl or an organosilicon radical bonded to phosphorous via oxygen, and a is 1 to 5. Also disclosed is a method for producing an organopolysiloxane by polymerisation reaction in the presence of a said catalyst composition, and use of .gamma.-butyrolactone as a carrier for a phosphonitrile catalyst in the preparation of an organopolysiloxane.

Abstract: A catalyst system comprising a silylated silicoaluminophosphate composition, and methods of preparing such catalyst system, are disclosed. The thus-obtained catalyst system is employed as a catalyst in the conversion of a hydrocarbon feedstock comprising oxygenated hydrocarbons to olefins.

Abstract: A method for preparing a catalyst and the use of such catalyst for converting an oxygenate feed to olefins wherein the catalyst is modified or treated with the aid of electromagnetic energy.

Abstract: A catalyst composition, a process for producing the composition, and a hydrocarbon conversion process for converting a hydrocarbon stream such as, for example, gasoline, to olefins and C.sub.6 to C.sub.8 aromatic hydrocarbons such as benzene, toluene and xylenes are disclosed. The catalyst composition comprises a zeolite and phosphorus. The process for producing the composition comprises the steps of: (1) combining a zeolite with a phosphorus compound under a condition sufficient to produce a phosphorus-promoted zeolite; and (2) heating the phosphorus-promoted zeolite. The hydrocarbon conversion process comprises contacting a hydrocarbon stream with the catalyst composition under a condition sufficient to effect the conversion of a saturated hydrocarbon to an olefin and a C.sub.6 to C.sub.8 aromatic hydrocarbon.

Abstract: The present invention relates to a catalyst composition comprising an acid supported on carrier characterised in that said composition comprises in addition an amino compound.

Abstract: A method for converting starting material to olefins comprising contacting the starting material with a small pore non-zeolitic molecular sieve catalyst under effective conditions to produce olefins, wherein the non-zeolitic molecular sieve has been prepared in-situ or modified after synthesis by incorporation using an alkaline earth metal compound, wherein the alkaline earth metal ion is selected from the group consisting of strontium, calcium, barium, and mixtures thereof.

Abstract: A catalyst composition and a process for hydrodealkylating a C.sub.9 + aromatic compound such as, for example, 1,2,4-trimethylbenzene to a C.sub.6 to C.sub.8 aromatic hydrocarbon such as a xylene are disclosed. The composition comprises an alumina, a metal oxide, a phosphorus oxide and optionally, an acid site modifier selected from the group consisting of silicon oxides, sulfur oxides, boron oxides, magnesium oxides, tin oxides, titanium oxides, zirconium oxides, molybdenum oxides, germanium oxides, indium oxides, lanthanum oxides, cesium oxides, and combinations of any two or more thereof. The process comprises contacting a fluid which comprises a C.sub.9 + aromatic compound with the catalyst composition under a condition sufficient to effect the conversion of a C.sub.9 + aromatic compound to a C.sub.6 to C.sub.8 aromatic hydrocarbon.

Abstract: The invention concerns a hydrotreated catalyst comprising a support, at least one group VI metal, silicon, boron, optionally at least one metal from group VIII of the periodic table, optionally phosphorus, and optionally a halogen, also a particular preparation of this catalyst. The invention also concerns the use of the catalyst for hydrotreating hydrocarbon feeds.

Abstract: A catalyst composition and a process for using of the catalyst composition in a hydrocarbon conversion process are disclosed. The composition comprises an inorganic support, a Group VA metal or metal oxide, and optionally a Group IVA metal or metal oxide and a Group VIII metal or metal oxide. The process comprises contacting a fluid which comprises at least one saturated hydrocarbon with the catalyst composition under a condition sufficient to effect the conversion of the hydrocarbon to an olefin. Also disclosed is a process for producing the catalyst composition.

Abstract: The present invention is directed to a catalyst composition comprising a non-zeolitic molecular sieve and one or more alkaline earth metals selected from the group consisting of strontium, calcium, barium, and mixtures thereof, wherein said non-zeolitic molecular sieve has a pore diameter size of less than about 5 Angstroms.

Abstract: Microporous crystalline metallophosphate composition having an essential framework structure whose chemical composition in the as synthesised form expressed in terms of mole rations of oxides is: mR(M.sub.x Al.sub.y P.sub.z)O.sub.2 where M is silicon, x+y+z=1, m may have a value from 0.02 to 0.3, R is at least one templating agent, x, y and z represent the mole fractions of silicon, aluminium and phosphorous presentin the product, and where x may have a value from 0 to 0.5, y may have a value from 0.25 to 0.5 and z may have a value from 0.25 to 0.5, and where one reactive form of fluoride may be present in an effective amount to form the product, and having a characteristic X-ray powder diffraction pattern containing at least the d-spacings as set forth in Table 1.

Abstract: A coating composition which is excellent in water resistance, weatherability and durability and can maintain its appearance for a prolonged period of time can be provided. A coating composition comprising a coating component and a photocatalyst containing calcium phosphate and titanium oxide is disclosed. As the photocatalyst, use is made of titanium oxide particles partially covered thereon with calcium phosphate, or porous body coated thereon with a film of titanium oxide, the film of titanium oxide being further covered partially thereon with calcium phosphate. The crystal form of titanium oxide is preferably anatase. The organic coating includes vinyl-type synthetic resin emulsions, and the inorganic coating is e.g. a solution containing a metal alkoxide for forming a film by a sol-gel method.

Abstract: The present invention is a large-pore aluminophosphate or substituted aluminophosphate comprising a compositionaR:(M.sub.x Al.sub.y P.sub.z)O.sub.2wherein R represents an organic templating agent, and a=0 to 0.4, X=0 to 0.4, y=0.35 to 0.5, and Z=0.25 to 0.5 and characterized by the diffraction pattern of Table 1 and M may be Si, Ga, Ge, Co, Ni, Zn, Fe, V, Ti and mixtures thereof.

Abstract: An improved process is provided for adding a hydrogenation component to a non-zeolitic molecular sieve catalytic particulates with minimal loss in micropore volume for improved performance catalytic performance. The process includes adding an active source of the hydrogenation component dissolved in a non-aqueous solvent.

Abstract: Readily processible cluster compositions of vanadium and phosphorus are precursors to vanadium-phosphorus catalysts including vanadyl pyrophosphate and vanadylbis(metaphosphate).

Abstract: A method for fluorinating molecular sieve catalysts to increase selectivity to ethylene during conversion of oxygenates to olefins, fluorinated catalysts produced by such method, and methods of using the fluorinated molecular sieve catalysts to increase selectivity to ethylene during conversion of oxygenates to olefins.

Abstract: A compound having the general formula AM.sub.1+y.sup.3+ M.sub.2-2y.sup.4+ M.sub.y.sup.5+ Si.sub.2 P.sub.6 O.sub.25, wherein A can be K, Rb, or Cs, M.sup.3+ can be Al, Ga, Cr, Fe, Sc, In, Y, lanthanide series elements, or combinations of these, M.sup.4+ can be Si, Ge, Ti, Ir, Ru, Sn, Hf, Zr, or combinations of these, M.sup.5+ can be V, Nb, Ta, or combinations of these, 0.ltoreq.y.ltoreq.1, the mean ionic radius of the M.sup.3+ cations and the mean ionic radius of the M.sup.5+ cations are each about 0.4 to 1.00 .ANG. when coordinated by six oxygen anions, and the mean ionic radii of the M.sup.4+ cations and the M.sup.5+ cations are each no greater than about 0.53+(0.30.times.the mean ionic radius of the M.sup.3+ cations). The compound can be made by a dry powder method that involves providing a homogeneous powder mixture of raw materials to form the compound, shaping the mixture into a preform, and firing the preform at a sufficient temperature and for a sufficient time to form the product compound.

Abstract: A method for making catalyst particles having improved resistance to surface area loss through thermal degradation. The particles are preferably metal oxide particles and more preferably alumina hydrate particles having a surface area of at least about 150 m.sup.2 /g. The particles are mixed with an organic monomer, preferably furfuryl alcohol. The monomer is polymerized to form polymer coated metal oxide particles. Thereafter, the polymer coated particles are treated with a phosphorus-containing acid or salt.

Abstract: A catalyst for converting methanol to light olefins along with the process itself are disclosed and claimed. The catalyst is a metalloaluminophosphate molecular sieve having the empirical formula (EL.sub.x Al.sub.y P.sub.z)O.sub.2 where EL is a metal such as silicon or magnesium and x, y and z are the mole fractions of EL, Al and P respectively. The molecular sieve has a crystal morphology in which the average smallest crystal dimension is at least 0.1 microns. Use of this catalyst gives a product with a larger amount of ethylene versus propylene.

Abstract: This invention relates to a process for the preparation of highly active and selective ammoxidation catalyst of formula (VO).sub.2 P.sub.2 O.sub.7 ,TiO.sub.2 or (VO).sub.2 P.sub.2 O.sub.7, Al.sub.2 O.sub.3, which process comprises refluxing a vanadium source in the presence of alcohols; adding a source of phosphorous to form vanadyl pyrophosphate hydrate (VO).sub.2 H.sub.4 P.sub.2 O.sub.9 or (VO).sub.2 P.sub.2 O.sub.7.2H.sub.2 O ; Physical mixing of (VO).sub.2 H.sub.4 P.sub.2 O.sub.9 with oxides selected from titania or alumina, and heating the resultant mixture in the presence of air at a temperature in the range of 300-600.degree.C. for a period in the range of 1 to 10 hours; and the use of said ammoxidation catalyst in the preparation of heteroaromatic nitrites.

Abstract: Disclosed is a novel binary sieve catalyst useful for olefin upgrading and fluid catalytic cracking which comprises a crystalline zeolite metallosilicate core and a shell selected from an aluminum phosphate molecular sieve (AlPO.sub.4), a silicon-substituted aluminophosphate (SAPO), a metal aluminophosphate (MeAPO), and a crystalline metal aluminophosphate (MeAPSO) and is generally synthesized by a method comprising:adding a powdered form of crystalline zeolite metallosilicate into an aqueous slurry comprising phosphoric acid, alumina source, metal salt and an amine, mixing the slurry for 1 to 12 hours in a Teflon liner at room temperature, sealing said slurry in an autoclave and placing said slurry in an oven at 130.degree. C. to 240.degree. C. for 12-168 hours to form said binary molecular sieve catalyst, washing and drying the product, calcining the product at 530.degree. to 570.degree. C. in nitrogen for 5-15 hours, calcining the product in air for 1 to 3 hours to burn off the template.

Abstract: A catalyst composition, a process for producing the composition, and a hydrotreating process for converting a hydrocarbon stream such as, for example, gasoline, to olefins and C.sub.6 to C.sub.8 aromatic hydrocarbons such as toluene and xylenes are disclosed. The catalyst composition comprises a zeolite, a clay, and a promoter. The process for producing the composition comprises the steps: (1) combining a zeolite with a clay and a promoter under a condition sufficient to bind the clay to the zeolite to produce a clay-bound zeolite; and (2) heating the clay-bound zeolite to produce a modified zeolite. The hydrotreating process comprises contacting a hydrocarbon stream with the catalyst composition under a condition sufficient to effect the conversion of a hydrocarbon to an olefin and a C.sub.6 to C.sub.8 aromatic hydrocarbon.

Abstract: A process is provided which comprises using a catalyst comprises a rare earth element supported on an inorganic heat-resisting carrier, when a monoethanolamine is selectively prepared by reacting an alkylene oxide with ammonia in a liquid phase. This catalyst has excellent monoalkanolamine selectivity and heat resistance; and therefore, even when the ratio of ammonia to the alkylene oxide is lower compared with cases where other catalysts are used, an equal or more amount of the monoalkanolamine can be formed, and thus the recovery cost of the unreacted ammonia is reduced. Further, since the total amount of the feed raw materials is reduced, apparatuses for the reaction system and recovery system can be made smaller, and thus the cost of equipment is reduced.

Abstract: A malodorous component is eliminated using a catalytic composition comprising a phosphate of a tetravalent metal (titanium or other Group 4 elements of the Periodic Table of Elements), a hydroxide of a divalent metal (copper, zinc or other transition metal), and a photocatalyst. The photocatalyst includes sulfide-semiconductors, oxide-semiconductors and other photo-semiconductors, e.g. titanium oxide. The composition may further contain silicon dioxide and/or a silver component. The catalytic composition insures efficient elimination of not only acidic components and basic components but also neutral components over a long period, irrespective of with or without a light irradiation.

Abstract: Support for catalysts, containing at least two constituents chosen from silica, alumina and aluminium phosphate, having a specific surface of 100 to 800 m.sup.2 /g, a crystallization temperature greater than or equal to 700.degree. C. and a pore volume of 1.5 to 4 cm.sup.3 /g, the specific surface (SS) and the pore volume (PV) corresponding to the relationship:SS<(PV.times.564-358).Process for the manufacture of such a support, according to which an alcohol, water, a silicon alkoxide and an acid are mixed under conditions such that gelling or precipitation of silica is prevented, an acidic solution of an aluminium compound and/or a solution of a source of phosphate ions are added thereto, a gelling agent is added thereto, a gel is recovered which is washed with water and then by means of an organic liquid, the gel is then dried until a powder is obtained, and the powder is calcined. Polymerization of olefins in the presence of a catalyst containing chromium on a support as described above.

Abstract: A phosphoric acid catalyst on a shaped, inorganic support and its use for the hydration of olefins. At least 90 wt. % of the catalyst support consists of titanium dioxide and/or zirconium dioxide and has outstanding ageing stability under the hydrothermal conditions existing during hydration processes.

Abstract: This invention provides a method for preparing non-zeolitic molecular sieves using inexpensive reagents and at lower manufacturing cost. The method includes using a low density, small size particulate hydrated alumina, such as aluminum hydroxide, in place of aluminum alkoxides and other more costly reagents. The preferred particulate hydrated alumina has a density of less than 1.0 g/cm.sup.3, an average particle size of less than about 40 microns and an alkali content of less than 0.12 wt %.

Abstract: The present invention is directed to a process for the carbonylation of an arylene to an arylaldehyde (e.g., toluene to tolualdehyde) in the presence of a solid acid catalyst. The process for making tolualdehyde comprises carbonylating toluene in the presence of either carbon monoxide or a source of carbon monoxide and in contact with a solid acid catalyst. The reaction is carried out at a temperature ranging from -40.degree. to 200.degree. C., and at a pressure ranging from 20-4000 psig.

Abstract: The synthesis and characterization of novel molecular sieves containing bis(pentamethylcyclopentadienyl) cobalt(III) ion are described. Several types of molecular sieves were prepared using the cobalt metal complex as a template that was shown to be incorporated as a guest molecule within the molecular sieve. Molecular sieves prepared using bis(pentamethylcyclopentadienyl) cobalt(III) ion as template were characterized as having a pore size at least as large as 7 .ANG.. Other molecular sieves were also prepared using bis(cyclopentadienyl) cobalt(III) templates. The compounds are attractive as catalysts in a wide range of applications.

Abstract: A microporous crystalline silico-alumino-phosphate RUW-18, the theoretical composition of which, on a water-free basis after synthesis and calcination, is: H.sub.x Si.sub.x Al.sub.y P.sub.z O.sub.2 where x has a value between 0.005 and 0.1 and y and z are values between 0.4 and 0.6. The product has an AEI structure and possesses acidic properties. A procedure for manufacturing the product is also described. RUW-18 is suitable as a sorbent and as a catalyst in the manufacture of olefins from methanol.

Abstract: Reforming is effected with a combination of a primary supported noble-metal catalyst and a catalyst containing one or more medium-pore non-zeolitic molecular sieves (MP-NZMS). The latter reforming and dehydrocyclization catalysts comprise a Group VIII metal and at least one bound MP-NZMS characterized in the calcined form by an adsorption of isobutane of at least 2 percent by weight at a partial pressure of 500 torr and a temperature of 20.degree. C. and characterized by an adsorption of triethylamine less than about 5 percent by weight at a partial pressure of 2.6 torr and a temperature of 22.degree. C. The MP-NZMS catalyst binder preferably is alumina and/or silica, and the Group VIII metal preferably is platinum.

Abstract: Homogeneous amorphous aluminum phosphate composition with a surface of 100 to 300 m.sup.2 /g and a pore volume in pores with diameters of less than 1000 nm of at least 1.0 cm.sup.3 /g, in which phosphorus and aluminum are present in a molar ratio in the range from 0.9:1 to 1:1 and which is characterized in that it is present in the form of microspherical particles with a particle size of 10 to 20 .mu.m and displays a bimodal pore-size distribution in the pore-diameter range of less than 1000 nm. Also described is a process for the production of the novel aluminum phosphate composition, which is suitable in particular as a cracking catalyst, as a catalyst support, especially for polymerization catalysts, as a flatting agent, as an adsorption agent and as a thickening agent.

Abstract: An aluminophosphate-type molecular sieve is prepared using a templating agent derived for an organosulfonium cation of the form S.sup.+ (R).sub.3, wherein each R is independently selected from alkyl, aryl and alkylaryl.

Abstract: A process is disclosed for preparing a non-zeolitic molecular sieve from a dense gel containing sufficient liquid that the dense gel may be formed into self-supporting particles if desired prior to crystallization. In the process, the dense gel, which is optionally in the form of particles, is heated at crystallization conditions and in the absence of an external liquid phase, so that excess liquid need not be removed at the conclusion of the crystallization step.

Abstract: Molecular sieves, particularly metalloaluminophosphates are prepared using templates derived from a 4-azonia-tricyclo 5.2.n.0.sup.2,6 !alkene family of compounds. The templates may be prepared in a series of reaction steps which include a Diels-Alder reaction between a diene and a dienophile.

Abstract: Process for the preparation of branched olefins comprising contacting a hydrocarbonaceous feedstock comprising linear olefins having at least four carbon atoms at elevated temperature with a catalyst which comprises a MeAPO and/or MeAPSO medium-pore molecular sieve having an anhydrous composition expressed in molar oxide ratios as follows; (MeO).sub.a (Al.sub.2 O.sub.3).sub.b (P.sub.2 O.sub.5).sub.c (SiO.sub.2).sub.d, whereby (a+b)/c is greater than 1.0, a ranges from 0.003 to 0.2, b and c range from 0.05 to 0.3, d is at most 0.4 and a/(c+d) is at least 0.05 when SiO.sub.2 is present, and Me is at least one of Mg, Mn, Co and Zn.

Abstract: The synthesis and characterization of novel molecular sieves containing bis(pentamethylcyclopentadienyl) cobalt(III) ion are described. Several types of molecular sieves were prepared using the cobalt metal complex as a template that was shown to be incorporated as a guest molecule within the molecular sieve. Molecular sieves prepared using bis(pentamethylcyclopentadienyl) cobalt(III) ion as template were characterized as having a pore size at least as large as 7 .ANG.. Other molecular sieves were also prepared using bis(cyclopentadienyl) cobalt(III) templates. The compounds are attractive as catalysts in a wide range of applications.

Abstract: A novel Phillips catalyst for the copolymerization of ethylene with .alpha.-olefins, contains, as a catalytically active component, a finely divided, aluminum silicate-supported, phosphorus-containing chromium catalyst. This can be prepared by applying at least one organic phosphorus(III), (IV) and/or (V) compound and at least one chromium(III) compound which does not react with said phosphorus compounds under the reaction conditions used, in succcession in any order or simultaneously, to a finely divided aluminum silicate hydrogel or xerogel with formation of a catalyst intermediate and activating the catalyst intermediate at elevated temperatures in an oxidizing atmosphere, with the result that the chromium catalyst is formed. The novel Phillips catalyst gives ethylene/.alpha.-olefin copolymers in which the comonomers are more uniformly distributed over the copolymer chains than is the case with ethylene/.alpha.-olefin copolymers which have been prepared with the aid of conventional Phillips catalysts.

Abstract: A method for enhancing ethylene yield in the conversion of oxygenates to olefins that involves extracting molecular sieve catalysts, such as silicoaluminophosphate catalysts, with a mineral acid is provided. Acid extraction is thought to alter the crystallinity of the molecular sieve catalyst and thereby improve ethylene yield.

Abstract: Improved catalysts for isomerizing epoxides to allylic alcohols are disclosed. The catalysts contain lithium phosphate supported on high-purity silica. The use of high-purity silica as a support results in improved epoxide conversion and allylic alcohol selectivity, and reduced by-product generation. The invention includes a process for isomerizing epoxides using the catalysts. The process is well-suited to the manufacture of allyl alcohol from propylene oxide.

Abstract: A method of preparing a catalyst used for producing methacrylic acids through gas phase catalytic oxidation of methacrolein with molecular oxygen. The catalyst is represented by the formula:P.sub.a Mo.sub.b V.sub.c Ge.sub.d X.sub.e Y.sub.f Z.sub.g O.sub.hwherein P, Mo, V, Ge and O represent phosphorous, molybdenum, vanadium, germanium and oxygen, respectively; X represents at least one element selected from the group consisting of arsenic, antimony, bismuth, zirconium, tellurium, silver and boron; Y represents at lest one element selected from the group consisting of iron, copper, zinc, chromium, magnesium, tantalum, manganese, barium, gallium, cerium and lanthanum; Z represents at least one element selected from the group consisting of potassium, rubidium, cesium and thallium, and a, b, c, d, e, f, g and h represent the atomic ratios of the respective elements, and when b=12, then a=0.5-3, c=0.01-3, d=0.01-3, e=0-3, f=0-3, g=0.