The invention relates to a catalyst composition comprising a mixed oxide of vanadium, titanium, and phosphorus modified with alkali metal. The titanium component is derived from a water-soluble, redox-active organo-titanium compound. The catalyst composition is highly effective at facilitating the vapor-phase condensation of formaldehyde with acetic acid to generate acrylic acid, particularly using an industrially relevant aqueous liquid feed.

Uses for a family of new crystalline molecular sieves designated SSZ-91 are disclosed. Molecular sieve SSZ-91 is structurally similar to sieves falling within the ZSM-48 family of molecular sieves, and is characterized as: (1) having a low degree of faulting, (2) a low aspect ratio that inhibits hydrocracking as compared to conventional ZSM-48 materials having an aspect ratio of greater than 8, and (3) is substantially phase pure.

A process is disclosed for opening naphthenic rings of naphthenic ring-containing compounds. Naphthene ring opening is achieved using a self-supported mixed metal sulfide catalyst comprising nickel sulfide, molybdenum sulfide, tungsten sulfide and an organic complexing agent. The catalyst is characterized as having a composition of metal components, in terms of molar ratios; as follows: 0.25Ni/(Ni+Mo+W)0.80; 0<Mo/(Ni+Mo+W)0.25; 0.12W/(Ni+Mo+W)0.50; and 1.5W/Mo3.0.

The present invention relates to bismuth-titanium oxide composite nanowires used for photocatalysis and a preparation method, belonging to the field of inorganic nanomaterials. The preparation of the bismuth-titanium oxide composite nanowires is: polyvinylpyrrolidone (PVP) and bismuth nitrate are added to N-N dimethylformamide (DMF), tetrabutyl titanate and acetylacetone are added after magnetic stirring has been performed for a period of time, continual stirring is performed for more than six hours, and a transparent, stable solution is obtained. Electrospinning is performed on the solution in an electrospinning generation device under certain conditions, and the obtained electrospinning precursor nano fibres are air-fired in a muffle furnace to remove organic matter. After being cooled to room temperature, the electrospinning precursor nano fibres are placed in a tube furnace to be reduced and sintered in a hydrogen atmosphere. The method is energy-saving and environmentally friendly, the conditions are easy to control, costs are low, and large-scale industrial production is easy. The obtained bismuth-titanium oxide nanowires exhibit good degradation activity on methyl orange under illumination, where the methyl orange degradation rate is reaching more than 95% in a reaction lasting for 20 minutes. The obtained bismuth-titanium oxide nanowires have wide application prospects in relation to sewage treatment.

Process for hydrocracking and/or hydrotreatment of hydrocarbon feeds utilizing a catalyst comprising at least one hydro-dehydrogenating element of group VIB and of non-precious group VIII used alone or mixed, and a support comprising at least one porous mineral matrix and at least one dealuminated USY zeolite having an overall silicon-to-aluminium atomic ratio comprised between 2.5 and 10, a fraction by weight of extra-network aluminium atom greater than 10% relative to the total mass of the aluminium present in the zeolite, a mesopore volume measured by nitrogen porosimetry greater than 0.07 ml.g.sup.1, and a crystal parameter a.sub.0 of the elemental mesh greater than 24.28 , in which a quantity of the element nickel comprised between 0.5 and 3% by weight relative to the total mass of the zeolite is deposited on said USY zeolite and in which said catalyst is in the sulphide form.

The present invention relates to a catalyst system for oxidation of o-xylene and/or naphthalene to phthalic anhydride (PA), comprising a plurality of catalyst zones arranged in succession in the reaction tube, which has been produced using antimony trioxide consisting predominantly of the senarmontite modification of which all primary crystallites have a size of less than 200 nm. The present invention further relates to a process for gas phase oxidation, in which a gas stream comprising at least one hydrocarbon and molecular oxygen is passed through a catalyst system which comprises a plurality of catalyst zones arranged in succession in the reaction tube and which has been produced using an antimony trioxide consisting predominantly of the senarmontite modification with a median primary crystallite size of less than 200 nm.

A process and apparatus for manufacture of oxide products for use as biocide, chemical detoxifying, and catalytic support products, from caustic calcined carbonate powder, preferably from magnesite, dolomite, or hydromagnesite, is described. These oxide particles are characterized by high surface area, high porosity and a high degree of calcination, and the method of manufacture utilizes an indirectly heated counterflow reactor. The oxides may be used as a powder, granules, or formulated into a slurry and used as a spray, emulsion, foam or fog, or the powder product may be directly applied. Also described is the formation of particles with microstructures defined by at least one nano-crystalline structure positioned on the outer surface of the particles.

The present invention relates to a method for the production of a support material for a nitrogen oxide storage component that is applicable in catalysts for treating exhaust gases from lean-burn engines and a support material made according to said process that is stable against the reaction with a Barium compound to form BaAl.sub.2O.sub.4.

An catalyst for purifying exhaust gas comprising an OCS material that has sufficient heat resistance and achieves a favorable balance between the oxygen storage volume and the oxygen absorption/release rate includes an catalyst for purifying exhaust, which has a substrate and a catalyst coating layer formed on the substrate, wherein the catalyst coating layer comprises a ceria-zirconia-based composite oxide having a pyrochlore structure in an amount of 5 to 100 g/L based on the volume of the substrate, the ceria-zirconia-based composite oxide has a secondary particle size (D50) of 3 m to 7 m, and the ceria-zirconia-based composite oxide optionally contains praseodymium.

The present invention provides a process and catalyst for the direct and selective conversion of ethane to ethylene. The process provides a direct single step vapor phase selective dehydrogenation/oxidative dehydrogenation of ethane to ethylene over Mo supported nanocrystalline TiO.sub.2. The process provides ethane conversion of 65-96% and selectivity of ethylene up to 100%. The process may be conducted in the presence or absence of oxygen.