A process for preparing a catalytic cracking catalyst, which process comprises: a molecular sieve is introduced into a gas-phase ultra-stabilization reactor, the molecular sieve is moved without the conveying of carrier gas from a molecular sieve inlet of the gas-phase ultra-stabilization reactor to a molecular sieve outlet of the gas-phase ultra-stabilization reactor, and the molecular sieve is contacted and reacted with a gaseous SiCl.sub.4 in the gas-phase ultra-stabilization reactor, the molecular sieve resulting from the contacting and the reacting is optionally washed, then mixed with a matrix and water into slurry, and shaped into particles.

A composite ozone catalyst, a preparation method and use thereof. The composite ozone catalyst of the present invention includes a co-carrier mixed with biochar and a silica-alumina-based material, and a metal element and a nitrogen element supported on the co-carrier. The preparation method includes mixing the biochar and the silica-alumina-based material powder and then placing the same in a metal precursor solution for impregnation, adding a polyvinyl pyrrolidone solution to the impregnated material, wet granulating to form a spherical material, and calcining the spherical material to obtain the composite ozone catalyst. The composite ozone catalyst has low production cost, simple preparation processes, good catalytic performance, and strong stability, which can meet the high-efficiency and low-consumption requirements of ozone catalytic oxidation in the advanced treatment of industrial wastewater.

In the present disclosure, imidazole-derived materials including M-NC catalysts, imidazole-derived MOFs and MOF-based M-NC catalysts as well as methods for preparing the same utilizing mechanochemical synthesis and/or a sacrificial support-based methods are described.

The present invention provides a process for in-situ preparation of metal oxide(s) comprising the step of precipitating a metal salt solution with Fehling's reagent B and glucose at a suitable temperature. The metal oxide(s) prepared according to the present invention can be used for diverse applications including their utility as catalyst(s) in one or more reactions. The present invention further provides a highly selective bi-functional hybrid catalyst for direct conversion of syn-gas to dimethyl ether (DME) and methods of preparation thereof. The one or more metal oxide(s) can be directly obtained from the metal precursors following the method(s) of the present invention instead of metal hydroxides as in conventional known methods, thereby eliminating the necessity of high temperature calcination step(s) and rigorous reduction procedure(s).

Provided is a layered alkali iridate and a layered iridic acid to be used for producing iridium oxide nanosheets, and an iridium oxide nanosheet. A layered alkali iridate with composition of M.sub.xIrO.sub.y.nH.sub.2O (where M is a monovalent metal, x is 0.1 to 0.5, y is 1.5 to 2.5, and n is 0.5 to 1.5), wherein M.sub.xIrO.sub.y.nH.sub.2O has a layered structure. The M is potassium, and the layered alkali iridate has diffraction peaks at 2 diffraction angles of 13.0 and 26.0. A layered iridic acid with a composition of H.sub.xIrO.sub.y.nH.sub.2O (where x is 0.1 to 0.5, y is 1.5 to 2.5, and n is 0 to 1), wherein H.sub.xIrO.sub.y.nH.sub.2O has a layered structure. This layered iridic acid has diffraction peaks at 2 diffraction angles of 12.3 and 24.6. A single crystalline iridium oxide nanosheet having a thickness of 3 nm or less.

This invention comprises a process and a system thereof comprising apparatuses for developing multi-component vapor mixture by heating of solution of reactants comprising one or more of diphenols, or diphenol derivatives, and an organic compound, wherein the organic compound is one which upon reacting in a vapor state in presence of a catalyst with diphenols, or diphenol derivatives, produces a monoalkyl ether of a dihydric phenolic compound; and wherein the entire solution of reactants completely transforms into a super-heated multi-component vapor using heaters without the use of thin film evaporator. The complete transformation of the entire solution of said reactants in to super-heated multicomponent vapor is achieved by heating the entire solution firstly by a pre-heater followed by further heating by a super-heater, further comprising removal of the unevaporated or condensed high boilers and tar to drain, and subjecting the superheated vapor to vapor phase reaction mediated by catalyst to get monoalkyl ether of a dihydric phenolic compound.

A three-way catalyst is disclosed. The three-way catalyst comprises a palladium component comprising palladium and a ceria-zirconia-alumina mixed or composite oxide, and also comprises a rhodium component comprising rhodium and a zirconia-containing material. The palladium component and the rhodium component are coated onto a silver-containing extruded molecular sieve substrate. The invention also includes an exhaust system comprising the three-way catalyst. The three-way catalyst results in improved hydrocarbon storage and conversion, in particular during the cold start period.

The invention concerns a process for the preparation of an amorphous mesoporous and macroporous alumina, comprising at least one step for dissolving an acidic precursor of aluminium, a step for adjusting the pH by adding at least one basic precursor to the suspension obtained in step a), a step for co-precipitation of the suspension obtained at the end of step b) by adding at least one basic precursor and at least one acidic precursor to the suspension, a filtration step, a drying step, a shaping step and a heat treatment step.

The invention also concerns an amorphous mesoporous and macroporous alumina with a bimodal pore structure having: a specific surface area S.sub.BET of more than 100 m.sup.2/g; a median mesopore diameter, by volume determined by mercury intrusion porosimetry, of 18 nm or more; a median macropore diameter, by volume determined by mercury intrusion porosimetry, in the range 100 to 1200 nm, limits included; a mesopore volume, as measured by mercury intrusion porosimetry, of 0.7 mL/g or more; and a total pore volume, as measured by mercury porosimetry, of 0.8 mL/g or more.

A hydroconversion catalyst with a bimodal pore structure: an oxide matrix predominantly of calcined aluminium; a hydro-dehydrogenative active phase of at least one group VIII metal being at least partly commixed within the said oxide matrix mainly made up of calcined aluminium, an S.sub.BET specific surface greater than 100 m.sup.2/g, a mesoporous median diameter in volume between 12 and 25 nm inclusive, a macroporous median diameter in volume between 250 and 1500 nm inclusive, a mesoporous volume as measured by mercury intrusion porosimeter greater than or equal to 0.55 ml/g and a total measured pore volume by mercury porosimetry greater than or equal to 0.70 ml/g;
a method for preparing a residue catalyst for hydroconversion/hydroprocessing by commixing the active phase with a particular alumina,
the use of the catalyst in hydroproces sing, including hydroproces sing heavy feeds.

A method for producing catalysts containing copper, in particular for producing catalyst moldings having increased mechanical strength and low volume reduction, to the catalysts produced by means of the method according to the invention, and to the use of said catalysts as catalysts or as precursors and components for catalysts. The catalysts are suitable in particular for the synthesis of methanol and for the low-temperature conversion of CO into CO2.