21results about How to "Improve hydrogenation activity" patented technology

The present invention discloses a waste plastic oil hydrofining catalyst and a preparation method thereof, the catalyst comprises an active component and a carrier, the total mass of the catalyst is 100%, the active component accounts for 10 wt%-30 wt%, the carrier accounts for 70 wt%-90 wt%, the carrier comprises a Ce (at) Cu-M / Al2O3 composite oxide, and M is an alkali metal oxide or an alkaline earth metal oxide. According to the present invention, the synthesized Ce (at) Cu-CaO / Al2O3 composite oxide is adopted in the carrier material, such that the chlorine resistance of the catalyst is improved, the dispersity and the carbon deposition resistance of the active component on the catalyst surface are significantly improved, the high hydrogenation activity of the catalyst is obtained, the hydrogenation catalysis performance of the catalyst is effectively improved, and the waste plastic oil hydrofining dechlorination effect is improved.

The application discloses a petroleum resin hydrogenation catalyst and a preparation method thereof. The petroleum resin hydrogenation catalyst comprises a first phase and a second phase; the first phase comprises aluminum oxide and nickel oxide, the second phase comprises aluminum oxide, zinc oxide and nickel oxide, and the catalyst has a spherical core-shell structure. The preparation method of the petroleum resin hydrogenation catalyst comprises the following steps: firstly, preparing an aluminum oxide-nickel oxide composite material; then, uniformly dispersing the composite material with a surfactant and a hydrocarbon-containing compound to obtain material A; uniformly mixing aluminum sol, a zinc-containing compound, a nickel-containing compound, a curing agent and an emulsifier additive to obtain a mixed solution; finally, mixing the material A with the mixed solution, and further performing forming, aging, extraction, washing, drying and calcination to obtain the petroleum resin hydrogenation catalyst. The petroleum resin hydrogenation catalyst has the advantages of high sulfur resistance, high hydrogenation decolorization performance and high stability, and is especially suitable for C5 and C9 petroleum resin hydrogenation treatment processes.

This application discloses a compatibilizer for polystyrene / polyolefin blends and its preparation method, belonging to the field of block copolymers. A block copolymer is disclosed, comprising polystyrene blocks and polyethylene blocks; the block copolymer is crystalline; the aggregated structure of the block copolymer consists of a polystyrene microphase region, a polyethylene crystalline region, and a branched amorphous region—three phases coexisting. This block copolymer exhibits extremely high compatibility with both polystyrene and polyolefin materials, effectively reducing interfacial tension between different materials, significantly improving the impact resistance, mechanical properties, and rheological behavior of polystyrene / polyolefin blends, without damaging other properties of the materials, and without side reactions such as crosslinking or degradation; this block copolymer exhibits plastic processing properties at high temperatures and elastomer properties at room temperature, classifying it as a thermoplastic elastomer; this block copolymer is also more flexible and has better transparency.

A hydrogenation catalyst is disclosed, using alumina as a support, on which molecular sieves and active components are loaded, including noble metals and promoter metals. The noble metals are Pt and / or Pd, and the promoter metals are Ni and / or Co. By weight of the catalyst, the molecular sieve accounts for 1-10%, the noble metals for 0.01-0.5% (based on elemental composition), and the promoter metals for 0.1-5% (based on elemental composition). The molecular sieves are loaded on the outer surface of the catalyst. This invention sequentially loads promoter metals and noble metals onto a support, and then obtains the catalyst through hydrothermal mixing with a molecular sieve precursor. This approach improves the contact area between the molecular sieve and the active metal, and facilitates the loading of the molecular sieve onto the active sites of the active metal, fully utilizing the molecular sieve's ability to donate H protons and enhancing the catalyst's hydrogenation activity. Furthermore, it increases the utilization rate of the molecular sieve, thus reducing the amount of molecular sieve used and lowering the catalyst cost. It exhibits higher olefin saturation activity and selectivity for the hydrotreating of reformed oils.

The invention relates to the technical field of catalysts, in particular to a catalyst, a preparation method thereof and a preparation method of hexamethylenediamine. The catalyst provided by the invention comprises a carrier, an active component and an auxiliary agent, the active component comprises Ni; the auxiliary agent comprises Fe and Cr. According to the catalyst disclosed by the invention, the bimetallic auxiliaries Fe and Cr are introduced, so that the content of zero-valent Ni is effectively increased, the hydrogenation activity is promoted, and the reaction process is accelerated; the catalyst is used for preparing hexamethylenediamine through adiponitrile hydrogenation, and the conversion rate of adiponitrile and the selectivity of hexamethylenediamine under mild conditions are improved.

This invention relates to the field of catalyst preparation technology, and more specifically, to the preparation and application of a metal catalyst for the production of the rubber antioxidant 6PPD. Copper nitrate and zinc nitrate compounds are dissolved in deionized water, and silicate esters are added and mixed in a water bath. The pH is adjusted, the mixture is aged, filtered, and washed with water to obtain the catalyst precursor. Copper halide is added and stirred until homogeneous, then dried in an oven, ground, and calcined to obtain the metal catalyst for the production of the rubber antioxidant 6PPD. This invention's metal catalyst maintains high activity and selectivity while also being low in cost, exhibiting excellent stability and environmental friendliness. The preparation process is simple, reproducible, and suitable for large-scale production, providing a novel catalytic solution with high industrial application value for the efficient and green synthesis of p-phenylenediamine antioxidants.

This invention discloses a magnesium-aluminum layered double hydroxide (MLD)-based solid alkali-supported ruthenium catalyst, its preparation method, and its application, belonging to the field of chemical catalytic materials technology. This invention uses magnesium-aluminum MLD as a support, metallic ruthenium as the hydrogenation active component, and magnesium oxide as the alkaline component. The preparation method involves mixing an aqueous dispersion of magnesium-aluminum MLD with frozen magnesium salt and an alkaline solution. The core step is to utilize a freeze-thaw process to perform high-dispersion exfoliation and hydrolysis reactions between the magnesium-aluminum MLD layers, generating magnesium hydroxide attached to the support. This magnesium hydroxide is then pyrolyzed to form a MgO / LDHs solid alkali catalyst precursor. This precursor is dispersed in water, mixed with an aqueous ruthenium salt solution, and reduced with a reducing agent solution to obtain the final catalyst. The freeze-thaw process of this invention significantly improves the dispersibility of the active component, achieving a catalyst specific surface area of ​​185 m² / g and a pore volume of 0.28 m³ / g. Applied to the selective hydrogenation reaction of nitrobenzene using methanol as a hydrogen source, no external alkali is required, achieving a nitrobenzene conversion rate of 61.50% and an aniline selectivity of 100%.

The application provides a Co@ZrC catalyst and a preparation method and application thereof in furfural compound hydrogenation deoxygenation, the preparation method is as follows: using fumaric acid and zirconium salt as raw materials, a catalyst precursor Zr-MOF is prepared by a solvothermal synthesis method, then the precursor is impregnated with a cobalt salt, and in-situ high-temperature pyrolysis carbonization reduction is carried out to prepare the Co@ZrC catalyst. The catalyst is used in selective hydrogenation deoxygenation of furfural to prepare 2-methyl furan and selective hydrogenation deoxygenation of 5-hydroxymethyl furfural to prepare 2,5-dimethyl furan, and the target products are obtained in high yield. The catalyst preparation method is simple, the catalyst has high activity and selectivity and good stability, the furfural selective hydrogenation deoxygenation reaction condition is mild, the product yield is high, and obvious industrial production advantages are obtained.

The application discloses a hydrogenation catalyst, a preparation method and application thereof. The catalyst comprises a sulfided hydrogenation catalyst and a complex of auxiliary metals Fe and Mn, wherein the complex of auxiliary metals Fe and Mn contains two or more amine groups and / or imine groups. The preparation method of the hydrogenation catalyst comprises the following steps: (1) preparing a sulfided hydrogenation catalyst; (2) preparing an impregnation solution by mixing a Fe source and a Mn source with a complexing agent; and (3) impregnating the sulfided hydrogenation catalyst in step (1) with the impregnation solution in step (2), and drying to obtain the hydrogenation catalyst. The catalyst can realize reverse conversion of carbon deposition precursors to a certain extent, and is particularly suitable for a hydrogenation treatment process of secondary processing oil containing relatively high unsaturated hydrocarbons.

The application discloses an alumina dry gel powder, a preparation method and application thereof. The preparation method comprises introducing silicon elements in a neutralization and gelation reaction process, and introducing phosphorus elements after the neutralization and gelation reaction and before material drying. Preferably, the phosphorus elements are introduced after material washing and before drying. The alumina dry gel powder is suitable for preparing a distillate oil hydroprocessing catalyst. The prepared hydroprocessing catalyst shows high activity and high stability during long-period operation.

The invention provides a C4 alkylation raw material pre-hydrogenation catalyst and a preparation method thereof, the inventor finds through research that F with the strongest electronegativity is introduced into a carrier, under the strong electron-withdrawing effect of F, Pd is in an electron-deficient state Pd delta +, the bonding strength between Pd and S is weakened, and the catalytic activity of Pd is improved. According to the present invention, the sulfur resistance of the C4 alkylation raw material pre-hydrogenation catalyst can be significantly improved so as to treat the coking C4 raw material containing the impurity sulfur, and the inner surface of the F-modified carrier is provided with the organic cage having the regular structure, such that the Pd and the Au are loaded in the organic cage in the limited range to form the alloy due to the limitation of the size of the organic cage so as to achieve the sulfur resistance; the PdAu alloy has uniform active center size, and can be well dispersed on the surface of the carrier, so that active sites are fully exposed, the utilization rate of active atoms is improved, and the hydrogenation activity of the catalyst is further improved. Meanwhile, the catalyst has a certain 1-butene isomerization capability.

This invention relates to the field of high-purity benzene production technology, and in particular to a catalyst application process for producing high-purity benzene based on hydrorefining. Using crude benzene as raw material, and Co-Mo / γ-Al₂O₃-La₂O₃ as the hydrogenation catalyst, high-purity benzene is obtained through raw material pretreatment, staged hydrogenation reaction, and product separation and refining. Through steps such as support pretreatment, staged impregnation, staged calcination, and staged reduction, combined with optimized process parameters, the La₂O₃ promoter is uniformly dispersed on the support surface, forming a synergistic effect with the Co and Mo dual active components. This significantly improves the catalyst's hydrogenation activity, anti-carbon deposition performance, and thermal stability, solving the problems of insufficient activity and short service life of traditional catalysts.

The application relates to the field of organic liquid hydrogen storage, discloses a non-supported catalyst and a preparation method and application thereof, and a hydrogenation and dehydrogenation method of nitrogen-containing heterocyclic organic matter; the catalyst comprises Ni and Mo; the molar ratio of Mo to Ni is 0.2-5:1 in terms of elements; the Ni is located on the surface of a Mo-rich micro area, and the average grain size of the Ni is 1-200 nm. The non-supported catalyst provided by the application has bidirectional catalytic functions of hydrogenation and dehydrogenation, has relatively high hydrogenation activity and relatively high dehydrogenation activity, and the hydrogenation and dehydrogenation activity is close to that of noble metal and far higher than that of a conventional non-noble metal catalyst.

The application discloses a kind of carbon four alkylation raw material pretreatment catalyst and preparation method and pretreatment method, belong to carbon four light hydrocarbon processing technical field.Its technical scheme is: carbon four alkylation raw material first enters extraction column and is extracted, water-washed carbon four alkylation raw material is extracted from top and enters catalytic rectification column, catalytic rectification column is divided into rectification section, reaction section and stripping section from top to bottom, catalyst of the application is placed in reaction section;Carbon four alkylation raw material enters reaction section, butadiene therein and hydrogen gas occur reaction, and 2-butene generated in the reaction process is removed constantly;Catalytic rectification column bottom is extracted and pretreated carbon four alkylation raw material.The pretreatment method of the application carries out corresponding desulfurization, denitrogenation, deoxidant and diene hydrocarbon etc.pretreatment before carbon four alkylation raw material enters alkylation device, meets the requirement of alkylation feed to raw material impurity, improves alkylation oil quality, reduces the material loss of alkylation process.

The invention discloses a preparation method of an anthraquinone hydrogenation fluidized bed catalyst doped with black phosphorus, relates to the field of catalysts and carriers, and mainly solves the problem of loss of active components of an existing hydrogenation catalyst. The preparation method comprises the following specific steps: step 1, dissolving pseudo-boehmite or boehmite with an acid solution, stirring to prepare glue, mixing the prepared glue with acid, activated aluminum oxide powder and water, stirring, and adding a proper amount of auxiliary materials and dispersing agents to obtain a mixture; 2, granulating the mixture prepared in the step 1 by using a spray centrifugal dryer to obtain a carrier precursor, and roasting to obtain a fluidized bed catalyst carrier; and 3, modifying the fluidized bed catalyst carrier obtained in the step 2 by using black phosphorus, then loading an active component, and finally drying and roasting to obtain the anthraquinone hydrogenation fluidized bed catalyst. The anthraquinone hydrogenation fluidized bed catalyst prepared by the preparation method retains the advantage of high hydrogen efficiency of a fluidized bed catalyst, more importantly, active components are not easy to lose after the catalyst is used, the service life is prolonged, and the anthraquinone hydrogenation fluidized bed catalyst is beneficial to recycling. In addition, the preparation method is simple and suitable for large-scale production.

The invention provides a modified alumina carrier, a metal catalyst, a preparation method and application. The modified alumina carrier is prepared by taking industrial-grade formed alumina in a gamma-Al2O3 crystal form as a base material and carrying out in-situ modification treatment on carbon-containing gaseous micromolecules; the surface of the modified alumina carrier has reconstructed active sites and an electron-rich microcell environment, the reconstructed active sites are formed after an Al-O-Al bridge bond on the surface of a base material is broken, and the binding energy of Al < 2p > in an X-ray photoelectron spectroscopy of the electron-rich microcell environment is reduced by 0.2-0.35 eV compared with that of unmodified gamma-Al2O3. The preparation method provided by the invention is simple and convenient to operate under mild conditions, low in cost and suitable for industrial large-scale production requirements.

The application discloses a method for preparing isosorbide diamine. The method comprises the following steps: loading isosorbide diketone and ammonia into a reaction kettle loaded with a catalyst, introducing hydrogen into the reaction kettle, and reacting at 100 DEG C to 200 DEG C for 10-20 hours to generate isosorbide diamine through a reductive amination reaction; the catalyst is a core-shell structure, and is composed of an oxide shell layer and a metal core; the metal in the metal core is a main metal M1 or the main metal M1 and an auxiliary metal M2; the main metal M1 is Fe, Co, Ni or Cu; and the auxiliary metal M2 is Ru, Pd or Pt. The application avoids the essential problems existing in the original process, and realizes green and sustainable production of isosorbide diamine.

The application discloses a preparation method of a cerium oxide supported palladium catalyst and application of the catalyst in a solvent-free catalytic hydrogenation reaction of squalene, and belongs to the field of catalyst preparation and application. The catalyst takes cerium oxide as a carrier, and palladium is loaded through a deposition precipitation method to form a high-dispersion cerium oxide supported palladium catalytic system. The synergistic effect between the cerium oxide and the palladium significantly improves the hydrogenation efficiency and selectivity of the catalyst, and the catalyst is suitable for the catalytic hydrogenation reaction of squalene under a solvent-free condition. Compared with a traditional Pd / C catalyst, the prepared catalyst has higher activity, and the preparation method is simple, low in cost, and capable of efficiently catalyzing the hydrogenation of squalene under a solvent-free condition.

This invention discloses a catalyst for the hydrogenation of dimethyl adipate to 1,6-hexanediol. The catalyst comprises an active component, a promoter component, and a support. The active component is Cu, the promoter component is Mg, the highly active reaction site is the interface between Cu and MgAl₂O₄, and the support is alumina. This invention also discloses its preparation method and applications. The high-performance Cu-based catalyst of this invention exhibits high activity and high selectivity under mild reaction conditions during the hydrogenation of dimethyl adipate. Furthermore, the construction of the microscopic spinel interface on the catalyst surface demonstrates extremely high stability; the catalyst remains stable for 800 hours without deactivation. The catalyst preparation method of this invention is simple, reproducible, and uses inexpensive raw materials. The catalyst exhibits high activity, excellent selectivity, and good stability, making it easy to scale up for production.

The invention relates to a hydrogenation catalyst based on a mesoporous carbon material as well as a preparation method and application of the hydrogenation catalyst. The hydrogenation catalyst comprises the mesoporous carbon material and an active component loaded on the mesoporous carbon material, the metal elements of the active component comprise at least one VIII group metal element and at least one VIB group metal element; the specific surface area of the mesoporous carbon material is 200-1000 m < 2 > / g, the pore volume is 0.6-1.8 cm < 3 > / g, and the probable pore diameter is 5-20 nm. According to the hydrogenation catalyst provided by the invention, the mesoporous carbon material with a relatively large probable pore diameter is taken as a carrier, so that the contact between the reaction raw materials and the active center of the hydrogenation catalyst is promoted; according to the mesoporous carbon material provided by the invention, the active metal can be vulcanized more easily and converted into an active phase with hydrogenation performance, so that the hydrogenation activity of the catalyst on aromatic hydrocarbon is improved.