2029 results about "Hydrogenation reaction" patented technology

The invention relates to a preparation method of phenylmethylamine. The technical scheme adopted by the invention for mainly solving the problems of high catalyst loss, low production efficiency and high intermittent operation labor intensity is as follows: the preparation method of the phenylmethylamine comprises the following steps: mixing the raw material of cyanobenzene with a solvent material or at least one of one part of product materials in a mixing unit, introducing the mixture into a fixed bed hydrogenation reactor to be in contact with hydrogen and a catalyst and carry out multi-phase continuous hydrogenation reaction to obtain a product material containing phenylmethylamine, separating the product material to obtain a phenylmethylamine product, wherein the catalyst is a metal loaded catalyst; and the metal is selected from at least one of Pd, Pt, Cu, Ni, Mo and Fe. The preparation method can be used for preparing phenylmethylamine.

The invention relates to a manufacturing method of high-density aviation fuel, in particular to an aviation fuel mixture based on monoterpenoids and a preparation method of the aviation fuel mixture. Comprising monoterpenoids, polyhydric alcohols and a catalyst which serve as raw materials, and the mass ratio of the raw materials to the polyhydric alcohols is 1: 1. The conversion rate is high, the treatment steps are reduced, the thermal stability and combustion gravimetric heat of the product are improved, and the method is suitable for preparing aviation fuel with high density, low viscosity and low-temperature performance; cyclization and hydrogenation are carried out through a one-pot method, a reaction container does not need to be transferred, and the operation is simple; according to the polyol solvent system, cyclization of the monoterpenoids becomes easier due to participation of polyol, and the conversion rate is increased; according to the dual-catalyst system, a combination of an acidic catalyst and a heterogeneous hydrogenation catalyst is used in a reaction container, so that efficient dehydration and hydrogenation reactions are ensured; the aromatic compound content in the fuel can be controlled by adjusting hydrogenation conditions.

The invention relates to the technical field of hydrogen storage and release, and discloses a cyclic hydrogen storage and release system based on aromatic cycloalkane reaction, which comprises a hydrogenation reaction unit, a dehydrogenation reaction unit, a gas-liquid separation and compression unit and an adsorption and purification unit which are sequentially connected through pipelines, the hydrogenation reaction unit, the dehydrogenation reaction unit and the gas-liquid separation and compression unit are respectively connected with the heat exchange unit; the hydrogen storage function and the hydrogen desorption function are integrally designed, the microwave heat supply dehydrogenation reactor is designed for the dehydrogenation reaction link with high energy consumption, and compared with the prior art, the microwave heat supply dehydrogenation reactor has the advantages that the heat transfer resistance is reduced, the reaction efficiency is improved, and the energy loss is reduced. The designed gas-liquid separation and adsorption purification technology is coupled, only one compressor is used in the whole process, the purification process is effectively simplified, the operation is simple and convenient, the equipment cost and the hydrogen purification cost are reduced, and the hydrogen yield and the hydrogen storage carrier cyclic utilization rate are improved. The system has the advantages of high hydrogen storage and release efficiency, small system size, high mobility and the like.

The invention discloses an acetonitrile hydrogenation catalyst and a preparation method and application thereof. The acetonitrile hydrogenation catalyst is a transition metal modified Pt supported catalyst. A transition metal precursor adopted in the transition metal improvement is an oxide containing transition metal elements; the transition metal element is selected from at least one of titanium, vanadium, manganese, iron, cobalt, nickel and copper; the acetonitrile hydrogenation catalyst also comprises a carrier; the carrier is selected from at least one of gamma-Al2O3, SiO2, an MOR molecular sieve and a ZSM-5 molecular sieve. The catalyst can effectively catalyze acetonitrile hydrogenation to prepare ethylamine under mild reaction conditions. The supported catalyst provided by the invention has excellent reaction performance such as high acetonitrile conversion rate in acetonitrile hydrogenation reaction, the reaction condition is mild, the operation is simple, and the catalyst is easy to prepare and can be recycled.

The invention discloses application of a Ni-based reverse-phase catalyst in catalytic hydrogenation reaction of a nitro compound, nitro in the nitro compound is hydrogenated to reduce amino, the Ni-based reverse-phase catalyst is of an M / Ni reverse-phase structure, metal Ni for dissociating hydrogen serves as a carrier, nano metal M oxide is loaded on the carrier to serve as a loading phase, and reverse-phase interface active sites are constructed; wherein the metal M is one or two of Ce, Zr, Al, Y and Mg, and the mole fraction of the load phase metal M is 5-50% based on the mole fraction of all the metals in the catalyst being 100%. The preparation method of the catalyst is simple and easy to implement, the catalyst has a non-traditional supported reversed-phase structure, the activity of the catalyst is more excellent than that of a traditional supported catalyst when the catalyst is applied to the nitro-compound hydrogenation process, a traditional Raney nickel catalyst can be effectively replaced, a reaction system is clean and safe, repeatability is good, effective recycling can be achieved, and the catalyst is suitable for industrial production. The method is suitable for industrial production and has a good application prospect.

The invention discloses a method for joint production of cyclohexylamine and dicyclohexylamine, which comprises the following steps: 1) feeding aniline tail gas of a nitrobenzene catalytic hydrogenation production device into a gas-liquid separator for gas-liquid separation to obtain aniline tail hydrogen and aniline condensate; 2) mixing aniline tail hydrogen and new hydrogen as a raw material A, and mixing defective aniline and fresh aniline in proportion as a raw material B; (3) feeding the vaporized raw material B and the vaporized raw material A into a fixed bed reactor according to a certain hydrogen-oil ratio, and carrying out hydrogenation reaction; a hydrogenation reaction product is subjected to heat exchange condensation and then enters a gas-liquid separator for gas-liquid separation, a gas phase serves as recycle hydrogen to be mixed with the raw material A, and a liquid phase is fed into a distillation device; and 4) carrying out primary distillation and rectification purification in sequence to obtain cyclohexylamine and dicyclohexylamine. According to the method, aniline tail gas resources and defective aniline are fully utilized, the three-waste treatment cost is reduced, product benefits can be improved, pollution to the environment can be reduced, and economic benefits and social benefits are remarkable.

The invention discloses a system and a method for producing biological aviation kerosene by using waste oil and belongs to the technical field of biological aviation kerosene preparation. The method comprises the following steps: (1) the waste grease and a magnetic catalyst loaded with ionic liquid are mixed and enter a suspended bed pre-hydrogenation reactor for reaction to obtain a pre-hydrogenation product, a carrier in the magnetic catalyst loaded with the ionic liquid is Fe3O4 magnetic particles coated with a silicon dioxide layer, and the ionic liquid is molybdenum-based ionic liquid; (2) separating the pre-hydrogenation product to obtain a primary hydrogenation product; (3) performing hydrogenation upgrading on the primary hydrogenation product to obtain an upgraded intermediate product; (4) separating the upgrading intermediate product to obtain a secondary hydrogenation upgrading product; and (5) carrying out hydroisomerization reaction on the secondary hydrogenation upgrading product to obtain the biological aviation kerosene. According to the method, the magnetic catalyst loaded with the ionic liquid is adopted to catalyze the waste grease, recycling can be achieved under the action of a magnetic field, the catalytic stability is high, and industrial stable production can be achieved without supplementing the catalyst.

The invention discloses a method for preparing a single-benzene-ring liquid chemical through solvent-free hydrogenation degradation of polystyrene waste plastics based on a bifunctional catalyst. According to the method, Nb2O5 is taken as a carrier, 1-3wt% of noble metal ruthenium is loaded to prepare a bifunctional catalyst, and high-molecular-weight polystyrene is efficiently degraded into single-benzene-ring liquid chemicals such as benzene, methylbenzene and ethylbenzene through hydrogenation reaction under a solvent-free condition. Precious metal ruthenium hydrogenates a polystyrene long chain to generate a short-chain hydrocarbon intermediate, then a carrier # imgabs0 # acid site drives beta-cracking and hydrogen transfer reaction, and a single-benzene-ring product is directionally generated through the synergistic effect of the short-chain hydrocarbon intermediate and the carrier # imgabs0 # acid site. The method has the advantages of no solvent, reduced equipment cost, high reaction efficiency, simple reaction operation, mild reaction conditions, simple catalyst preparation process, high activity, selectivity and good stability, and is suitable for industrial production, and no other solvents preempt acidic sites. The method not only can realize cyclic utilization of resources, but also can alleviate the current environmental pollution problem.

The invention relates to the technical field of reactors, and discloses a uniform gas-liquid distribution suspended bed reactor for heavy oil hydrogenation, which comprises a reactor shell, a gas-liquid distribution disc is horizontally arranged at the lower end of an inner cavity of the reactor shell, a Venturi annular gas-liquid diffuser is arranged on the gas-liquid distribution disc, and a pre-distribution chamber is formed at the bottom of the gas-liquid distribution disc; the Venturi annular gas-liquid diffuser comprises an outer gas guide pipe arranged on the gas-liquid distribution disc in a penetrating mode. According to the Venturi annular gas-liquid diffuser, through the synergistic effect of a liquid-phase flow annular nozzle and a gas-phase flow annular nozzle, a liquid phase sprayed out at a high speed is actively sheared and broken relative to a low-speed gas phase, and uniform small bubble groups can be generated, so that the gas-liquid contact area is greatly increased; the dissolution rate and the mass transfer efficiency of the hydrogen into the heavy oil are remarkably improved, so that the hydrogenation reaction depth and the product quality are directly improved, and meanwhile, the catalyst in a catalyst suspended bed reaction zone is effectively protected.

The invention relates to the field of biomass energy and chemical industry, in particular to an efficient methanol preparation method based on biomass graded catalytic conversion and cycle coupling. The method comprises the following steps: in a graded catalytic oxidation reaction system, mixing a biomass raw material with a composite vanadium-based catalyst, water, oxygen and circulating methanol for reaction to generate a gas-liquid mixture containing methyl formate; recycling methyl formate by using a gradient variable-pressure rectification separation system; carrying out an interface hydrogenation reaction under the action of a copper-zinc-LTA hierarchical pore catalyst to generate methanol; finally, part of methanol is purified and recycled through membrane separation. The method realizes efficient conversion from biomass to methanol, has the advantages of mild reaction conditions, low energy consumption, high yield and good catalyst stability, and opens up a new path for industrialization of preparation of methanol from biomass.

The invention relates to the technical field of chemical engineering, and particularly discloses a palladium-carbon catalytic hydrogenation reaction material treatment system, which comprises a three-dimensional workshop structure, an air-operated hoist, an air supply system, an air supply system and an air supply system, wherein the top of the three-dimensional workshop structure is provided with an elevator and a hoisting ton bag; the palladium-carbon circulating unit comprises a palladium-carbon preparation kettle, a hydrogenation reaction kettle, a decarbonization filter, a filter pressing cylinder, a sample splitter and a glove box which are connected in sequence, and the sample splitter is connected back to the palladium-carbon preparation kettle through a closed pipeline; the solid feeding unit comprises a ton bag feeder, a pneumatic valve and a spiral conveying pipe, and the tail end of the solid feeding unit is connected with a top feeding hole of the hydrogenation reaction kettle; the gas supply system comprises a hydrogen cylinder group and is connected to a gas distributor at the bottom of the hydrogenation reaction kettle through a pressure reducing valve and a flow regulating valve; through the multi-stage separation design and the safety interlocking mechanism of the palladium-carbon circulating unit, the recovery rate of the catalyst is increased, meanwhile, the pressure, temperature and stirring state are monitored in real time to trigger nitrogen purging or pressure relief, and the risks of hydrogen leakage and reaction out-of-control are reduced in combination with inert gas protection of the glove box.

The utility model provides a hydrogenation reaction system for producing sulfur by reducing acid gas regenerated by activated carbon, which comprises an acid gas pretreatment system, a first-stage hydrogenation system, a second-stage hydrogenation system, a tail gas treatment system and a liquid sulfur tank, the acid gas generated by regeneration of desulfurized activated carbon is pretreated and then is subjected to hydrogenation reduction to produce sulfur, the hydrogenation is divided into two stages, wherein the primary hydrogenation is divided into a plurality of sections according to different SO2 contents, a sectional hydrogenation method is adopted, gas subjected to the primary hydrogenation enters the secondary hydrogenation, air is introduced into the gas subjected to the secondary hydrogenation, and after side reaction products generated by hydrogenation are oxidized into sulfur and SO2, residual tail gas is sent back to an inlet of the activated carbon desulfurization device. Through first-stage hydrogenation and second-stage hydrogenation, the temperature rise of the hydrogenation reaction is reduced, side reactions are reduced, and the SO2 conversion rate is improved; oxidation-method tail gas treatment is adopted to directly return to activated carbon for desulfurization, and no waste gas is discharged on the whole.

The utility model relates to a slurry bed hydrogenation reactor for producing hydrogen peroxide by an anthraquinone process. The slurry bed hydrogenation reactor comprises a hydrogenation reactor, a recycle gas condenser and a degassing tank, wherein the bottom of the hydrogenation reactor is provided with a working solution feeding distributor and a hydrogen feeding distributor, the middle of the hydrogenation reactor is provided with a gas raising cylinder, the gas raising cylinder and a straight cylinder at the lower part of the reactor have the same diameter and are provided with a gap, and an overflow area is arranged above the gas raising cylinder; an annular space between the gas raising cylinder and the upper expanded section of the reactor is a discharging standing area, a discharging baffle is arranged at a discharging port of the standing area, a discharging pipe is connected with a degassing tank, and a gas phase balance pipe and a gas-liquid balance pipe are sequentially arranged at the top of the degassing tank from top to bottom; the top of the hydrogenation reactor is connected with the recycle gas condenser. By adopting internal and external circulation two-stage degassing and solid separation, the conditions that the discharged material of the hydrogen reactor carries hydrogen and the concentration of a catalyst is too high are avoided, and the consumption of raw materials is reduced.

The invention discloses a hydrofining method for optimizing the chromatic value of a bio-based terephthalic acid product, and belongs to the technical field of terephthalic acid hydrofining. The special refining process suitable for the bio-based CTA is formed by optimizing the whole process of pretreatment, hydrogenation reaction and post-treatment. The process not only solves the problem that the bio-based raw material has many impurities, but also realizes the balance of environmental protection and economy through the green solvent (water), the efficient catalyst (Pd / C) and controllable parameter design, provides a feasible path for the industrial production of bio-based PTA, and promotes the transformation of the polyester industry to sustainable development. The method provided by the invention is high in impurity removal rate, can efficiently purify the bio-based CTA to obtain a product meeting the PTA standard, is mild in reaction condition, realizes low-energy-consumption and high-stability operation under efficient catalysis, is small in process pollution, and reduces the environmental load.

The invention discloses a hydrogenation catalyst as well as a preparation method and application thereof. The hydrogenation catalyst comprises a molecular sieve coated with a metal oxide layer and active metal loaded on the metal oxide layer; the metal oxide layer is selected from at least one of titanium oxide, zinc oxide, zirconium oxide or niobium oxide, and the active metal is selected from at least one of Pt, Pd, Ru, Ir or Ni. The catalyst provided by the invention is used in cinnamyl aldehyde hydrogenation reaction, and has good cinnamyl aldehyde conversion rate and cinnamyl alcohol selectivity.

The present application relates to a kind of green olefin removal method completely replacing clay, which comprises under liquid phase continuous hydrotreating conditions, first, reforming generated oil is mixed with hydrogen through high-efficiency mixer, hydrogen is mixed with reforming generated oil intensively and quickly, and saturated hydrogen-dissolved reforming generated oil is obtained, the saturated hydrogen-dissolved reforming generated oil is sent into first hydrogenation reactor, first contact with nickel-containing catalyst, and the reaction product is then introduced into second hydrogenation reactor, and contact with noble metal-containing catalyst.Reformate is treated by olefin removal, and the product obtained mainly contains benzene, toluene, xylene and other aromatic hydrocarbons, the bromine index of which is less than 20 mgBr / 100g oil, and the loss of aromatic hydrocarbons is less than 0.1wt%.

The invention relates to the technical field of waste tire recovery, in particular to a method and a system for preparing biological aviation fuel by hydrogenation of waste tire pyrolysis oil, a pretreatment unit is used for performing multi-stage filtration and preheating treatment on the waste tire pyrolysis oil; the hydrogenation reaction unit is used for carrying out hydrogenation reaction and shallow cracking reaction on the pretreated waste tire pyrolysis oil; the separation and purification unit comprises a hot high-pressure separator, a dechlorination reactor, a cold high-pressure separator, a hot low-pressure separator and a cold low-pressure separator, and is used for carrying out dechlorination reaction and gas-oil-water separation treatment on a product of the shallow cracking reaction; the circulating hydrogen unit is used for providing mixed hydrogen for the system; and the fractionation unit is used for fractionating the product separated by the separation and purification unit to obtain the biological aviation fuel. According to the method, the waste tire pyrolysis oil is converted into the biological aviation fuel by adopting a series hydrogenation process, so that the problem of waste tire treatment is solved, and high-value utilization of resources is also realized.

The utility model relates to a fire-fighting spraying device for hydrogen leakage, which belongs to the field of hydrogenation reactors and comprises a support base, a frame is fixedly mounted at the top of the support base, and the hydrogenation reactor positioned in the frame is arranged at the top of the support base. According to the fire-fighting spraying device for hydrogen leakage, the spraying mechanism is arranged, the hydrogen leakage detector is arranged at the joint of the pipelines on the hydrogenation reactor and used for monitoring whether hydrogen leakage occurs or not in real time, and if the hydrogen leakage detector detects hydrogen leakage, a signal is transmitted to the controller; the controller starts the water pump, the servo motor and the alarm, water in the water storage tank can be conveyed into the flow dividing housing and sprayed out of the multiple spraying heads in a pressurized mode, water is sprayed to each hydrogenation reactor below, and meanwhile the flow dividing housing is driven by the servo motor to swing front and back so that the spraying range can be widened; static electricity can be eliminated by wetting and cooling leakage points, and fire and explosion accidents are avoided.

The present invention discloses a method for preparing tetrahydropentamethylindane. The method comprises the following steps: 1) introducing 1,1,2,3,3-pentamethylindane, a catalyst, a solvent, and hydrogen into a microchannel reactor; under the action of the catalyst, the 1,1,2,3,3-pentamethylindane undergoes a selective hydrogenation reaction to obtain a first hydrogenation reaction liquid; and 2) subjecting the first hydrogenation reaction liquid to a second hydrogenation reaction to obtain a second hydrogenation reaction liquid. The hydrogen used in step 2) is supplemented with 10-2000 ppm of carbon monoxide gas. The method achieves high selectivity and high yield for tetrahydropentamethylindane, while the selectivity of over-hydrogenated products, such as hexahydropentamethylindane, is reduced, thereby achieving efficient conversion of 1,1,2,3,3-pentamethylindane.

The utility model discloses a hydrogen storage and supply device and a hydrogen fuel cell heat and power cogeneration system, and relates to the technical field of fuel cells. The hydrogen storage and supply device realizes normal-temperature and normal-pressure storage of hydrogen on the basis of a liquid organic matter hydrogen storage technology, and the principle is that hydrogen storage is realized by virtue of reversible reaction and hydrogenation reaction of unsaturated liquid organic matters such as olefin, alkyne or aromatic hydrocarbon and hydrogen, and hydrogen release is realized by virtue of dehydrogenation reaction. According to the liquid organic matter hydrogen storage technology, the hydrogen storage density is 5%-10%, and the hydrogen storage amount is large; and the hydrogen storage carrier is a liquid organic matter, normal-temperature and normal-pressure transportation can be achieved, convenience and safety are achieved, the requirement for the hydrogen liquid tank is low, and hydrogen leakage is basically avoided during transportation. And during dehydrogenation reaction, the temperature required by hydrogen desorption is low, the energy consumption is low, the hydrogen desorption rate is adjustable, and the hydrogen desorption device can be adapted to various hydrogen fuel cells. The hydrogen fuel cell heat and power cogeneration system collects and utilizes the lost heat of the cell, so that the comprehensive utilization rate of the hydrogen fuel cell is improved.

The invention relates to a method for preparing (S)-chiral amine through asymmetric catalysis of imine reductase, and belongs to the technical field of biological pharmacy. Comprising the following steps that imine reductase catalyzes imine to be subjected to a reductive hydrogenation reaction under the conditions of coenzyme and a coenzyme regeneration system, and the (S)-chiral amine compound is generated. According to the method, imine reductase is utilized to catalyze imine asymmetric reduction to prepare the innovative drug (S)-chiral amine compound, and compared with a traditional chemical synthesis method, the method has the advantages of being high in reaction efficiency, good in stereoselectivity, mild in reaction condition, environmentally friendly and the like, and is a method meeting the green production requirement.

This invention discloses a method for modifying the support medium of a Pd catalyst and its application. The preparation method of the Pd catalyst includes reacting zirconium salt, organic ligands, and acid to obtain a support UiO-66-X; then loading Pd onto the support UiO-66-X and reducing it to obtain the catalyst Pd@UiO-66-X; the organic ligands include 2-nitroterephthalic acid, 2-methoxyterephthalic acid, 2-aminoterephthalic acid, and terephthalic acid, and X is selected from NO2, OMe, NH2, and H. This invention changes the surface electron cloud density of the supported Pd nanoparticles by changing the ligands (-NO2, -H, -OMe, -NH2) of the support UiO-66, resulting in different abilities to activate hydrogen, thereby regulating the dehydrogenation and hydrogenation reactions in the racemicization process of Pd catalysis. The synergistic effect of different ligands with Pd changes the racemicization catalytic activity.

A process for producing branched aldehyde intermediates from alpha olefins, and further reacting said branched aldehyde intermediates via hydrogenation reactions, surfactant forming reactions and other chemical derivative forming reactions to produce branched alcohols, branched surfactants and other branched derivatives. A process for producing isomerized olefins, branched aldehydes, branched alcohols, branched surfactants and other branched derivatives through isomerization, hydroformylation, hydrogenation, surfactant forming reactions and other derivative forming reactions.

The invention discloses a catalyst for preparing cyclohexanone by cyclohexanol dehydrogenation coupled phenol hydrogenation, the catalyst has a composite metal hydrotalcite structure, the metal components comprise ruthenium, magnesium and aluminum, the metal components are uniformly dispersed in hydrotalcite, and the ruthenium, the magnesium and the aluminum respectively account for 1-5wt%, 10-30wt% and 1-10wt% of the total mass of the catalyst. The acid-base property, the specific surface area and the pore structure of the catalyst are optimized by adjusting the ratio of magnesium to aluminum, so that the dispersion of ruthenium is improved, the interaction between ruthenium and a hydrotalcite carrier is increased, and the synergistic effect of all the element components enables active centers in cyclohexanol dehydrogenation, hydrogen transfer and phenol hydrogenation processes to be efficiently combined together, so that the catalytic activity of the catalyst is improved. Rich alkaline sites are generated in the catalyst, the dehydration side reaction of cyclohexanol can be effectively inhibited, meanwhile, the selectivity of cyclohexanone prepared through phenol hydrogenation is improved, it is ensured that the phenol hydrogenation reaction and the cyclohexanol dehydrogenation reaction can be effectively coupled, and cyclohexanone is efficiently prepared.

The utility model relates to the technical field of reaction kettles, in particular to a reaction kettle for benzofuranone hydrogenation reaction, which comprises a kettle body and a hopper mounted at the top of the kettle body and communicated with an inner cavity of the kettle body, a scraper rotatably scrapes the inner wall of the reaction kettle, reaction solution residues are reduced, normal reaction can be ensured, and air discharged through an exhaust hole can be recycled. A fan is arranged to supply air to a plurality of stirring paddles on one hand and supply air to a spray head mounted at a feeding opening of a hopper on the other hand, so that air in the reaction kettle is prevented from escaping from the hopper, and the accuracy of detecting the condition of discharged air is improved; meanwhile, the materials are accelerated to enter the reaction kettle from the hopper, so that the solid raw materials are prevented from remaining at the material inlet of the hopper, the accurate and reliable formula proportion of each substance participating in the reaction is ensured, the gas generated by the reaction is prevented from being gathered and remaining in the reaction kettle, and the accuracy of the detection result of the gas discharged by the gas outlet pipe is further improved.

The invention discloses a three-dimensional ordered macroporous nitrogen-doped carbon-loaded CoPt nanocluster material as well as a preparation method and application thereof. The method comprises the following steps: by taking a three-dimensional structure stacked by polymer microspheres as a template, firstly filling precursors 2-methylimidazole and cobalt nitrate in the three-dimensional template, then placing the three-dimensional template containing the precursors in a mixed solution of ammonia water and methanol for crystallization, and after crystallization, carrying out high-temperature pyrolysis, thereby obtaining the cobalt-based composite material. And finally, carrying out vapor deposition by using platinum acetylacetonate to obtain the three-dimensional ordered macroporous nitrogen-doped carbon-supported cobalt-platinum material. According to the invention, Co is presented as a nanocluster by using a template method and a pyrolysis method, and the nanocluster is anchored on a highly regular three-dimensional ordered macroporous nitrogen-doped carbon carrier; meanwhile, Pt introduced by vapor deposition brings a hydrogen overflow effect by activating hydrogen, so that the material shows excellent activity and selectivity in a carbon dioxide hydrogenation reaction and has a good application prospect.

The invention discloses a method for preparing 1, 3-propylene glycol by hydrating and hydrogenating acrolein, which comprises the following steps: carrying out hydration reaction by taking an acrolein aqueous solution as a raw material and taking acylated and aminated modified polystyrene resin as a catalyst; carrying out flash evaporation or gas stripping on the product after the reaction to remove acrolein, condensing and recovering the removed acrolein, and carrying out hydrogenation reaction on the acrolein-removed mixed solution serving as a hydrogenation raw material on a metal catalyst; and after the reaction is finished, performing flash evaporation on the product to remove water and light components, and performing vacuum rectification to obtain a high-purity 1, 3-propylene glycol product. According to the method, the modified resin is used for catalyzing the acrolein hydration reaction, the overall yield of the 1, 3-propylene glycol can be increased, the catalyst modification process is simple, the cost is low, the additional value of the final product is high, and the method is suitable for industrial production.

The invention relates to an alkylated crown ether synthesis method which comprises the following steps: dissolving a benzo crown ether substrate in a solvent, adding a carbon supported Rh catalyst, and uniformly stirring; under a stirring condition, introducing hydrogen, and carrying out a hydrogenation reaction; and filtering, recovering the carbon supported Rh catalyst, and evaporating to remove the solvent to obtain the alkylated crown ether. Compared with the prior art, hydrogenation of the benzocrown ether substrate is carried out based on the carbon-supported Rh catalyst, and the method has the advantages of low reaction temperature, moderate pressure and rapid reaction, and is suitable for a large-scale production process. Meanwhile, the carbon carrier can be conveniently removed through incineration, chemical recovery of active metal is facilitated, and reduction of the synthesis cost is facilitated.

The invention provides a suspended bed hydrogenation reactor which comprises a box body, a hollow pipe which penetrates through the box body and is rotatably connected with the box body is arranged in the box body, the outer wall of the hollow pipe is fixedly connected with two L-shaped hollow rods communicated with the hollow pipe, and the outer wall of each L-shaped hollow rod is fixedly connected with a plurality of stirring rods; a plurality of through holes are formed in each L-shaped hollow rod in a penetrating manner; and the box body is fixedly connected with a product discharge port communicated with the box body. Raw oil and hydrogen discharged through a plurality of through holes are subjected to contact reaction, and materials are stirred in combination with rotation of a hollow pipe, an L-shaped hollow rod and a stirring rod, so that the hydrogen is in full contact with the materials, and the reaction effect is good; through rotation of the hollow pipe and cooperation of the hollow pipe and the reciprocating screw rod, the reciprocating screw rod, the L-shaped hollow rod and the stirring rod can move up and down while rotating, the contact effect of materials and hydrogen is better, the reaction is more sufficient, the effect and quality of hydrogenation reaction of raw oil are remarkably improved, and the production efficiency is improved.

The invention discloses a preparation method of a star-shaped multi-arm HSD viscosity index improver with a core-shell structure, and the preparation method comprises the following steps: uniformly mixing a non-polar hydrocarbon solvent, isoprene and butadiene, adding a polarity regulator, heating, adding an alkyl lithium initiator, and reacting to obtain a polymer shell; then adding a mixed solution of styrene, a coupling agent and a solvent at one time, and continuously reacting to obtain a star-shaped multi-arm polymer with a core-shell structure; the star-shaped multi-arm polymer with the core-shell structure is directly transferred to a hydrogenation kettle, alcohol termination is not needed, then a hydrogenation catalyst is added, heating is performed, hydrogen is introduced for a hydrogenation reaction, catalyst metal ions are removed, a solution is flocculated and dried, and the star-shaped multi-arm HSD viscosity index improver with the core-shell structure is obtained. According to the star-shaped multi-arm HSD viscosity index improver with the core-shell structure, on the premise that the shearing stability of an oil product is kept, the oil product has higher thickening capacity, and the development requirements of high-end oil products and long-life oil products are met.