340 results about "Hydrogenation catalysis" patented technology

The invention relates to a grading composition of a hydrogenation catalyst. From top to bottom, a reactor is filled with hydrodemetallization and a hydrodesulfurization catalyst; raw materials flow from top to bottom, and along with the flowing direction of raw materials, the activity of the catalyst gradually increases, the pore size gradually decreases, the grain size gradually decreases and the porosity gradually decreases; the hydrodemetallization catalyst and the hydrodesulfurization catalyst are both formed by one or more demetallization catalysts; concentrations of active metal components and acid auxiliary agents are in nonuniform distribution, and from the surface to the center of catalyst grains, the concentrations of the active metal components and acid auxiliary agents of the hydrodemetallization catalyst are of gradient increase, and the concentrations of the active metal components and acid auxiliary agents of the hydrodesulfurization catalyst are of gradient decrease; and based on weight content, the demetallization catalyst accounts for 15 to 80 percent, and the desulfurization catalyst accounts for 20 to 85 percent. The grading composition of the invention is applied to hydrogenation catalysis of oil and residual oil of heavy ends and has the advantages of possessing better activity and stability of demetallization, residual carbon removal and desulfurization, controlling temperature rise of a catalyst bed and degreasing the deactivation speed of the catalyst.

The present invention relates to a hydrosilation-curable organopolysiloxane resin composition comprising (A) an organopolysiloxane resin having three or more monovalent unsaturated aliphatic hydrocarbon groups and aromatic hydrocarbon carbon groups, (B) an organosilicon compound having two or more silicon-bonded hydrogen atoms and aromatic hydrocarbon groups, (C) a hydrosilation catalyst, and optionally (D) (d1) a solvent or (d2) a hydrosilation-reactive organosiloxane-based diluent, for optical transmission components, especially for optical transmission components serving as optical communication elements, relates to optical transmission components, represented by optical waveguides, comprisiong a hydrosilation-cured product of the aforementioned organopolysiloxane resin and organosilicon compound, and relates to a process for fabricatiing optical transmission components.

A method for preparing a microporous silicone resin which can be used to form low dielectric constant films useful for electrical insulating coatings on electronic devices comprising (A) contacting a hydridosilicon containing resin with an alkenyltriarylsilane in the presence of a platinum group metal-containing hydrosilation catalyst effecting formation of a silicon resin where at least 5 percent of silicon atoms are substituted with at least one triarylsilylalkylene group and at least 45 percent of silicon atoms are substituted with at least one hydrogen atom and (B) heating the silicon resin of step (A) in an inert atmosphere at a temperature sufficient to effect thermolysis of the triarylsilylalkylene groups from the silicon atoms.

The invention provides a method of improving poor diesel. Said method is made up of two technique: quanlity-improving through hydrogenation and solvent extraction. Poor diesel raw material is treated through quality-improving hydrogenation catalysis bed to strip sulfur, nitrogen and aromatic hydrocarbons, then the final liquid product is extracted through solvent oil to make sure that most of the aromatic hydrocarbons are extracted and get clean diesel products which is low in sulfur, nitrogen and aromatic hydrocarbons, but high in cetane ratio, and the extracted aromatic hydrocarbons are circulated to catalysis bed. Group techniques in said invention could deeply decrease the content of sulfur, nitrogen and aromatic hydrogenation in diesel, increase the cetane ratio at the same time through making full use of their own features, therefore, making the quality of the production meet the need of fuel specification and environmental legislation, also maintain a higher diesel rate.

The present invention discloses a loaded type amorphous alloy catalyst for preparing cyclohexanone by means of phenol catalytic hydrogenation and its preparation method. Said invention utilizes isochoric impregnation KBH4 reduction method to prepare amorphous alloy catalyst, said preparation method includes the following steps: preparing hydrotalcite carrier; making metal salt precursor solution and hydrotalcite carrier undergo the process of isochoric impregnation treatment; drying; roasting; drop-adding reductant KBH4 solution to make reduction; successively using deionized water and absolute ethyl alcohol to wash black solid precipitate obtained by above-mentioned solution reaction to neutrality so as to obtain the invented amorphous alloy catalyst.

The invention relates to a method of hydrogenation to improve quality of solvent oil. The invention takes one or more petroleum fractions from petrol, coal oil, diesel oil as raw materials, contactly reacting with hydrogenation catalysis containing ª

The present invention is a process for removing alkynes and/or dienes from an olefin product stream withdrawn from an oxygenate-to-olefins reactor. The process comprises hydrogenating a first olefin stream that has alkynes and/or dienes in the presence of excess hydrogen and a first hydrogenation catalyst. The hydrogenation of the first olefin stream produces a second olefin stream that has unreacted hydrogen. The second olefin stream is contacted with a second hydrogenation catalyst producing a third olefin stream. The third olefin stream has low levels of hydrogen and alkynes and/or dienes.

The invention belongs to the technical field of medical chemistry and particularly relates to a preparation method of beta-lactamase inhibitor drug avibactam sodium and an intermediate of beta-lactamase inhibitor drug avibactam sodium. Triethyl-silane is adopted to realize benzyl removal, hydrogenation catalysis operation in the prior art is omitted, the reaction condition is milder, safety risk is reduced, the product yield and the purity are greatly improved, and the preparation method is more suitable for large-scale production.

Disclosed herein are self-crosslinking compositions containing a hydrosilation catalyst and the reaction product of a mixture comprising (i) a resinous copolymer having both silicon-bonded hydrogen and silanol groups, and (ii) one or more vinyl-functional polyorganosiloxanes. These compositions have stable post-cure adhesive properties and are suitable for use in electronic applications.

The invention discloses application of a metal-free hydrogenation catalyst in catalyzing hydrogenation reaction of nitrobenzene and derivatives thereof. The metal-free hydrogenation catalyst is nitrogen-doped carbon nanotubes prepared by an impregnation process by using melamine as a nitrogen source, or nitrogen-doped carbon nanotubes prepared by an in-situ synthesis process by using ammonia gas as a nitrogen source; and the catalyst is applied to hydrogenation reaction of nitrobenzene and derivatives thereof. The nitrogen-doped carbon nanotubes used as the nitrobenzene hydrogenation catalyst do not support any metal active component, and can achieve the goal of hydrogenation catalysis only by using the nitrogen doping modification process. The whole reaction process avoids the use of noble metals, thereby saving the cost and avoiding environment pollution; and meanwhile, the catalyst can be recycled. The catalyst has the advantages of simple preparation method, low production cost, favorable hydrogenation effect, controllable reaction and environment friendliness, can not cause secondary pollution to the environment, and can be widely used in various hydrogenation reactions.

The invention discloses a method for preparing long-chain alkane from biomass derivatives 5-HMF (hydroxymethyl furfural) or furaldehyde. According to the method, the biomass derivatives 5-HMF or furaldehyde are used as raw materials; a condensation product is formed after base catalysis and methyl ketone compound condensation; then, ketonic or alcoholic intermediates of tetrahydrofuran rings are obtained through hydrogenation catalysis; finally, the long-chain alkane is prepared through hydrogenation and ring opening dual catalysis preparation. The method has the advantages that the raw materials can be prepared from biological saccharides through hydrolysis and dehydration; the yield of the alkane is high; the consumption of catalysts is low; the reaction condition is mild; the process is clean and simple; in the reaction process of preparing the alkane from the condensation products, other operations and control are not needed except the program temperature rise; a new path for preparing the long-chain alkane from the biomass derivatives 5-HMF or furaldehyde by a one-pot method is opened up.

The present invention relates to a process for the formation of an alcohol from an alkanoic acid, the steps of the process comprising: contacting a feed stream containing the alkanoic acid and hydrogen at an elevated temperature with a hydrogenating catalyst comprising from 3 to 25 wt. % of active metals comprising tin and cobalt and a metal promoter selected from the group consisting of noble metals or first metal, the first metal selected from the group of barium, cesium and potassium.

The invention provides a catalyst having a hydrogenation catalysis function, and a preparation method and an application thereof. The catalyst comprises a carrier, and at least one group VIII metal element and at least one group VIB metal element which are loaded on the carrier. The group VIII metal element and the group VIB metal element are separately in a non-uniform distribution along the radial cross section of the catalyst, wherein along the radial cross section of the catalyst, a ratio of Cexternal<VIII> to Cmiddle<VIII> is 0.1-0.9, and a ratio of Cexternal<VIB> to Cmiddle<VIB> is 0.1-0.85. The carrier is a hydrated alumina molded matter prepared from raw materials comprising at least one hydrated alumina, at least one rare earth element-containing compound and at least one cellulose ether. The invention also provides a method for hydrogenation treatment of a hydrocarbon oil. The catalyst provided by the invention shows higher catalytic activity, better catalytic stability and longer service life in a hydrogenation demetalization reaction of the hydrocarbon oil (especially a heavy hydrocarbon oil).

The present invention relates to a process for the formation of alcohols from alkanoic acids, the steps of the process comprising: contacting a feed stream containing the alkanoic acid and hydrogen at an elevated temperature with a hydrogenating catalyst comprising from 3 to 25 wt. % of active metals on a support, wherein the active metals comprise cobalt and tin.

The invention provides an intermetallic compound composite material. The intermetallic compound composite material is prepared from sulfur-doped mesoporous carbon and an intermetallic compound loadedon the surface of the sulfur-doped mesoporous carbon. The intermetallic compound is formed by adopting Pt, or Rh or Ir as a base. The invention further provides a preparation method of the intermetallic compound composite material, and further provides application of the intermetallic compound composite material to hydrogenation catalysis. The intermetallic compound composite material is synthesized by regulating and controlling the type and temperature of a metal salt precursor, and the intermetallic compound in the composite material has a small size of less than 5 nm and a high utilizationrate; and the preparation method has universality, the operation is simple, the cost is low, and the industrial production is easy.

Disclosed is an improved process for the preparation of 4,5-diamino-1-(substituted)pyrazoles and acid addition salts thereof by coupling the corresponding 5-amino-1-(substituted)pyrazole with an aromatic diazonium compound to produce an intermediate azo compound and contacting the intermediate azo compound with hydrogen in the presence of a hydrogenation catalyst to produce 4,5-diamino-1-(substituted)pyrazoles. Also disclosed is a decarboxylation process for the preparation of a 5-amino-1-(substituted)pyrazole by heating a solution comprising a 5-amino-4-carboxy-1-(substituted)pyrazole, an inorganic acid and an inert solvent.

The present invention relates to a process for the formation of ethanol from a mixed feed, the steps of the process comprising: contacting a feed stream containing the mixed feed and hydrogen at an elevated temperature with a hydrogenation catalyst comprising from 3 to 25 wt. % of a substantially equal molar ratio of cobalt and tin on a support, wherein the mixed feed comprises 5 to 40 wt. % ethyl acetate and 60 to 95 wt. % acetic acid.

The invention discloses core-shell structure thionazin composite microspheres and a preparation method thereof. The structural formula is shown by ASx@BPy, wherein 0.3<=x<=2, and 0.3<=y<=4. The method comprises the steps that firstly, powdery sulfide microspheres ASx are prepared, then, ASx powder, soluble salt of B and nontoxic red phosphorus are adopted as main raw materials, the core-shell structure thionazin composite microspheres are prepared by adopting a hydrothermal synthesis method under the effect of a surface active agent sodium dodecyl sulfonate (SDS), and the preparation method adopts nontoxic red phosphorus as a phosphorus source to replace a traditional raw material, namely, highly toxic, inflammable and explosive white phosphorus. The preparation method is simple and easy to implement, conditions are easy to control, the repeatability is good, and no later-period thermal treatment is needed. The prepared core-shell structure thionazin composite is better in catalytic performance compared with a single sulfide and phosphide, and can be used for lignin hydrogenation catalysis and photocatalytic degradation of dye wastewater.

A process for preparing a functionalized carbo-silicon compound comprising contacting, in the presence of a hydrosilation catalyst and under hydrosilation promoting conditions: a hydrolyzable silicon reactant having at least one Si—H functional group, and a functionalized olefin reactant containing at least one terminal olefin functional group and a tertiary carbon atom to which is bonded a second functional methyl group or functional carbon group characterized by having substantial potential to impede a hydrosilation reaction when otherwise not attached to the tertiary carbon atom.

The invention provides a preparation method of a catalyst with Fe nanoparticles inlaid into hierarchical pore molecular sieve crystal particles. The preparation method mainly comprises four steps: firstly, a micropore part unit is prepared with tetrabutylammonium bromide as a template agent; secondarily, a complex formed by a complexing agent and Fe ions is inlaid into the template agent in a molecule sieve, and then, Fe atoms are reduced into a molecular sieve crystal lattice under the hydrogen introduction condition; finally, a mesopore part unit is prepared with hexadecyl trimethyl ammonium bromide as the template agent, and Fe particles and a microporous unit are inlaid into a mesoporous framework. The preparation method has the benefits as follows: the catalyst has two kinds of pores, namely, mesopores and micropores, and has higher specific surface area and pore volume, and the Fe nanoparticles among the molecular sieve particles have higher catalytic activity and are applicable to the hydrogenation catalysis and cracking reaction process of residual oil. The granulated and formed catalyst can be used for a hydrogenation catalysis and cracking reaction of the residual oil and has high activity and high selectivity for gasoline and diesel.

The present invention relates to a catalyst having an amorphous support and one or more active metals. The amorphous support may comprise a support material and an amorphous support modifier, which adjusts the acidity of the support material. In preparing the amorphous catalyst, post-synthesis treatment, i.e. calcination, may be used to adjust the catalyst performance while converting acetic acid to ethanol.

The invention provides a multiwalled carbon nanotube (MCNTs)-supported platinum grease hydrogenation catalyst, belongs to the field of catalysts, and relates to a platinum catalyst loaded on the MCNTs. The catalyst is formed by the active component platinum loaded on the MCNTs, the actual loading amount of platinum is 1.73% (the carrier weight is used as the benchmark), the specific surface area of the catalyst is 412.12 m<2>g<-1>, the specific pore volume is 0.462 cm<3>g<-1>, the average pore diameter is 4.48436 nanometer, and the platinum particle diameter ranges from 2.5 nanometers to 5.5 nanometers. According to the platinum grease hydrogenation catalyst provided by the invention, the preparation technology is classic and simple, the carrier material is novel, and the catalytic activity of the hydrogenated soybean oil is extremely high; moreover, compared with the industrial nickel catalyst, the catalyst provided by the invention has the advantages that less trans fatty acids are generated, the selectivity is good, the quality of the hydrogenated oil is good, and the hydrogenation effect is excellent.

The invention discloses a method for prolonging the operation cycle of a deoxidized biomass oil hydrogenation device. According to the method, low-temperature pre-hydrogenation catalysis treatment is carried out on deoxidized biomass oil before carrying out high-temperature hydrogenation catalysis treatment; the coking tendency of the deoxidized biomass oil in the direct high-temperature hydrogenation process is avoided by the graded hydrogenation catalysis operation of low-temperature pre-hydrogenation and high-temperature hydrogenation; the operation cycle of the hydrogenation device is prolonged; the industrialization for further converting the hydrogenated and deoxidized biomass oil into naphtha and diesel oil through hydrogenation is implemented; meanwhile, the low-temperature pre-hydrogenation and high-temperature hydrogenation liquid phase can be directly used for preparing gasoline and diesel oil products through fractionation; high-temperature hydrogenation reaction effluents can be used for preheating the deoxidized biomass oil; the energy of the overall hydrogenation catalysis device is efficiently utilized.