The present disclosure relates to solid phosphoric acid (SPA) catalyst compositions useful in the formation of hydrocarbons, such as the oligomerization of olefins, prepared from formable mixtures that comprise a phosphate source and a siliceous support material source in amounts, for example, such that the ratio of the phosphate source and the siliceous support material source is within the range of about 2.9:1 to about 3.4:1 calculated on a weight basis as H.sub.3PO.sub.4:SiO.sub.2, and a dry particulate material.

The present disclosure provides for ambient temperature catalyst compositions for trace contaminant control (e.g., for environmental control assemblies for space systems) and related methods of fabrication and use. More particularly, the present disclosure provides for ambient temperature catalytic oxidation (ATCO) catalyst compositions for trace contaminant control with improvements to carbon monoxide and hydrogen capture, and related methods of fabrication and use.

The present disclosure relates generally to ceramic materials suitable for use as catalyst support materials, catalysts using such materials and methods for using them, such as methods for converting sugars, sugar alcohols, glycerol, and bio-renewable organic acids to commercially-valuable chemicals and intermediates. One aspect of the invention is a ceramic material including zirconium oxide and one or more metal oxides selected from nickel oxide, copper oxide, cobalt oxide, iron oxide and zinc oxide, the ceramic material being at least about 50 wt. % zirconium oxide. In certain embodiments, the ceramic material is substantially free of any binder, extrusion aid or additional stabilizing agent.

A catalyst is a hydrochloric acid oxidation catalyst for oxidizing hydrochloric acid. The catalyst includes a carrier, and copper, an alkali metal, and a rare earth element that are carried by the carrier. The catalyst is composed of particles. A rate of change in crushing strength before and after heating is 0% or more and 40% or less.

[00001]$\mathrm{Rate}\mathrm{of}\mathrm{change}\mathrm{in}\mathrm{crushing}\mathrm{strength}\mathrm{before}\mathrm{and}\mathrm{after}\mathrm{heating}=\left[I1-I0\right]/I0100\left(\%\right)$ I0: Crushing strength before heating I1: Crushing strength after heating

A catalyst is a hydrochloric acid oxidation catalyst for oxidizing hydrochloric acid. The catalyst includes a carrier, and copper, an alkali metal, and a rare earth element that are carried by the carrier. The catalyst is composed of particles. A rate of change in crushing strength before and after heating is 0% or more and 40% or less.

[00001]$\mathrm{Rate}\mathrm{of}\mathrm{change}\mathrm{in}\mathrm{crushing}\mathrm{strength}\mathrm{before}\mathrm{and}\mathrm{after}\mathrm{heating}=\left[I1-I0\right]/I0100\left(\%\right)$ I0: Crushing strength before heating I1: Crushing strength after heating

Catalysts, catalytic forms and formulations, and catalytic methods are provided. The catalysts and catalytic forms and formulations are useful in a variety of catalytic reactions, for example, the oxidative coupling of methane. Related methods for use and manufacture of the same are also disclosed.

Disclosed are a catalyst system and its use in a process for the conversion of a feedstock containing C.sub.8+ aromatic hydrocarbons to produce light aromatic products, comprising benzene, toluene and xylene. The catalyst system comprises (a) a first catalyst bed comprising a first catalyst composition, said first catalyst composition comprising a zeolite having a constraint index of 3 to 12 combined (i) optionally with at least one first metal of Group 10 of the IUPAC Periodic Table, and (ii) optionally with at least one second metal of Group 11 to 15 of the IUPAC Periodic Table; and (b) a second catalyst bed comprising a second catalyst composition, said second catalyst composition comprising (i) a meso-mordenite zeolite, combined (ii) optionally with at least one first metal of Group 10 of the IUPAC Periodic Table, and (iii) optionally with at least one second metal of Group 11 to 15 of the IUPAC Periodic Table, wherein said meso-mordenite zeolite is synthesized from TEA or MTEA and having a mesopore surface area of greater than 30 m.sup.2/g and said meso-mordenite zeolite comprises agglomerates composed of primary crystallites, wherein said primary crystallites have an average primary crystal size as measured by TEM of less than 80 nm and an aspect ratio of less than 2.

Process for preparing a catalyst support which process comprises a) mixing pentasil zeolite having a bulk silica to alumina molar ratio in the range of from 20 to 150 with water, a silica source and an alkali metal salt, b) extruding the mixture obtained in step (a), c) drying and calcining the extrudates obtained in step (b), d) subjecting the calcined extrudates obtained in step (c) to ion exchange to reduce the alkali metal content, and e) drying the extrudates obtained in step (d); process for preparing a catalyst by furthermore impregnating such support with platinum in an amount in the range of from 0.001 to 0.1 wt % and tin in an amount in the range of from 0.01 to 0.5 wt %, each on the basis of total catalyst; ethylbenzene dealkylation catalyst obtainable thereby and a process for dealkylation of ethylbenzene which process comprises contacting feedstock containing ethylbenzene with such catalyst.

The present invention relate to a binderless molecular sieve catalyst and a process for preparing the same, which are mainly useful for solving the problems of the current catalysts, such as lower activity, less pore volume and worse diffusivity. The present invention relates to a novel binderless molecular sieve catalyst, comprising, based on the weight of the catalyst, 90-100 wt. % of a molecular sieve, 0-10 wt. % of a binder, and 0-10 wt. % of an anti-wear agent, wherein said catalyst has a pore volume of 0.1-0.5 ml/g, an average pore diameter of 50-100 nm, and a porosity of 20-40%; the anti-wear agent is selected from the rod or needle-like inorganic materials having a length/diameter ratio of 2-20. Said catalyst has the advantages of higher activity, greater pore volume, larger average pore diameter and porosity, and better diffusivity, and well solves said problems and can be used for the industrial preparation of binderless molecular sieve catalysts.

This document relates to oxidative dehydrogenation catalyst materials that include molybdenum, vanadium, beryllium, oxygen, and optionally aluminum.