The invention relates to a process for the production of 1,3-butadiene from a feed comprising ethanol and acetaldehyde in the presence of a supported tantalum catalyst obtainable by aqueous impregnation of the support with a water-soluble tantalum precursor. Furthermore, the present invention relates to a process for the production of a supported tantalum catalyst, and the supported tantalum catalyst. Finally, the invention relates to the use of the supported tantalum catalyst for the production of 1,3-butadiene from a feed comprising ethanol and acetaldehyde to increase one or both of selectivity and yield of the reaction.

Generally, it is disclosed a catalyst for use in a hydrotreating hydrocarbon feedstocks and the method of making such catalyst. It is generically provided that the catalyst comprises at least one Group VIB metal component, at least one Group VIII metal component, about (1) to (about (30) wt % C, and preferably about (1) to about (20) wt % C, and more preferably about (5) to about 15 wt % C of one or more sulfur containing organic additive and a titanium-containing carrier component, wherein the amount of the titanium component is in the range of about (3) to (about (60) wt %, expressed as an oxide (Ti0.sub.2) and based on the total weight of the catalyst. The titanium-containing carrier is formed by co-extruding or precipitating a titanium source with a Al203 precursor to form a porous support material comprising Al.sub.20.sub.3 or by impregnating a titanium source onto a porous support material comprising Al.sub.20.sub.3.

A process for the production of a catalyst comprising the steps of: dissolving the requisite quantities of copper nitrate and nickel nitrate in de-ionised water to provide a sub-0.30 molar aqueous solution of copper nitrate and nickel nitrate together in the ratio required; providing an ammoniacal solution by adding concentrated aqueous solution of ammonia in a quantity equal to between six and ten times the quantity required to realise both a 1:6 molar ratio for Cu.sup.2+ to ammonia and a 1:6 molar ratio for Ni.sup.2+ to ammonia; loading gamma alumina with 1 to 30% w/w of copper and nickel in a weight ratio of nickel to copper of 1:5 to 2:1 by suspending the requisite quantity of gamma alumina in said ammoniacal solution to achieve the required loading of copper and nickel; stirring the resulting gamma alumina suspension for at least 4 h at room temperature; then the volatile components evaporate under ambient conditions leaving dry loaded gamma alumina, which is calcined at a temperature of at least 260° C. for at least 30 min with a constant heating up rate; a catalyst or catalyst mixture, the catalyst or each catalyst in the catalyst mixture being obtainable by the above-mentioned process; and the use of the catalyst or catalyst mixture for the conversion of exhaust gases from an internal combustion engine into carbon dioxide, water and nitrogen.

The disclosure discloses a catalyst capable of simultaneously removing COS and H.sub.2S in garbage gasification and a preparation method thereof, and belongs to the technical field of preparation of desulfurization catalysts. The method includes the following steps: pretreating an SBA-15 molecular sieve with a templating agent unremoved, which primarily includes the steps of removing the templating agent and introducing halogen atoms to modify the molecular sieve; then synthesizing an active component solution; and finally introducing active components into channels of the pretreated molecular sieve via surface tension by adopting an impregnation method, performing washing and drying, and performing calcining under an N.sub.2 atmosphere, so as to obtain the catalyst. An H.sub.2S and COS removal experiment is performed on the catalyst prepared according to the present disclosure under a simulated garbage gasification atmosphere, and a desulfurization experiment is performed as a control, so as to evaluate the desulfurization efficiency. The catalyst prepared according to the present disclosure can load the active components in fixed positions inside and outside the channels, and the components are easy to obtain, thereby having the advantages of low cost and good desulfurization effects.

Provided are a carbon-based noble metal-transition metal composite catalyst enabling high selective conversion of a carboxylic acid functional group into an alcohol functional group by pre-treating a carbon carrier including a predetermined ratio or more of mesopores, and a production method therefor.

Disclosed is a ruthenium-based catalyst for ammonia synthesis, preparation method and use thereof. The ruthenium-based catalyst comprises Ru—Ba-A core-shell structure which comprises a ruthenium nanoparticle as a core covered with a first shell and a second shell sequentially, wherein the first shell consists of a barium nanoparticle, and the second shell consists of a metal oxide. The Ru—Ba-A core-shell structure can effectively preventing agglomerations of ruthenium nanoparticles during the use of the catalyst and avoiding direct contact between the ruthenium nanoparticles and the metal oxides. In addition, barium nanoparticles have a promoting effect as an electronic promoter, which can effectively improve the stability and catalytic activity of ruthenium-based catalyst for ammonia synthesis, especially in the system for synthesizing ammonia from a coal gas.

A Ni—Al.sub.2O.sub.3@Al.sub.2O.sub.3—SiO.sub.2 catalyst with coated structure is provided. The catalyst has a specific surface area of 98 m.sup.2/g to 245 m.sup.2/g, and a pore volume of 0.25 cm.sup.3/g to 1.1 cm.sup.3/g. A mass ratio of an Al.sub.2O.sub.3 carrier to active component Ni in the catalyst is Al.sub.2O.sub.3:Ni=100:4˜26, a mass ratio of the Al.sub.2O.sub.3 carrier to an Al.sub.2O.sub.3—SiO.sub.2 coating layer is Al.sub.2O.sub.3:Al.sub.2O.sub.3—SiO.sub.2=100:0.1˜3, and a molar ratio of Al to Si in the Al.sub.2O.sub.3—SiO.sub.2 coating layer is 0.01 to 1. Ni particles are distributed on a surface of the Al.sub.2O.sub.3 carrier in an amorphous or highly dispersed state and have a grain size less than or equal to 8 nm, and the coating layer is filled among the Ni particles.

Provided are a method of preparing a supported metallocene catalyst, and a method of preparing polypropylene using the catalyst prepared thereby. According to the present invention, provided is a supported metallocene catalyst capable of preparing an isotactic polypropylene polymer having a low xylene soluble content while having excellent catalytic activity.

The present disclosure relates to an ammoxidation catalyst for propylene, a manufacturing method of the same, and an ammoxidation method of propylene using the same. Specifically, in one embodiment of the present disclosure, there is provided a catalyst having a structure in which a metal oxide is supported on a silica support having a narrow particle size distribution, and excellent wear resistance.

According to one or more embodiments presently disclosed, a catalyst for converting hydrocarbons may include catalytic oxidized metal materials comprising oxidized iron, oxidized cobalt, and oxidized copper. At least 95 wt. % of the catalytic oxidized metal materials may be a combination of oxidized iron, oxidized cobalt, and oxidized copper. The catalyst may additionally include a mesoporous support material comprising pores having an average pore diameter of from 2 nm to 50 nm. At least 95 wt. % of the mesoporous support material may comprise alumina. At least 95 wt. % of the catalyst may be the combination of the catalytic oxidized metal materials and the mesoporous support material. Additional embodiments are included, such as methods for making the presently disclosed catalysts.