179 results about "Phenyl-acetylene" patented technology

The invention discloses a preparation method and catalytic application of a monatomic dispersion palladium-based catalyst. The preparation method of the monatomic dispersion palladium-based catalyst is a photo-deposition method, and uses zinc-containing hydrotalcite as a carrier to prepare the monomeric dispersion palladium-based catalyst. Namely, an alcohol solution and an H2PdCl4 solution are added to a hydrotalcite carrier-dissolved aqueous solution; electrons are transferred from a valence band to a conduction band in a hydrotalcite semiconductor under irradiation of ultraviolet light; alcohol molecules in the solution are subjected to oxidation reaction to generate hydroxyl radicals in holes. Study on photo-deposition process shows that a monatomic palladium catalyst can be prepared by controlling the amount of added H2PdCl4 solution and illumination time. The preparation method provided by the invention performs reduction treatment on catalyst samples at different temperatures, monatomic palladium is not aggregated at the moment; the monatomic dispersion palladium-based catalyst has excellent catalytic activity and selectivity for hydrogenation reaction of phenylacetylene.

The present invention relates to one kind of 2, 3, 2', 3'-tetrafluoro acetylene derivative and its composition, preparation process and use. The compound has the general expression as shown, relatively great optical anisotropy, relatively great negative dielectric anisotropy, relatively high light and heat stability and relatively low viscosity. The compound may constitute well behaved nematic phase liquid crystal composition with low threshold voltage, low viscosity, high response speed, improved response characteristic and contrast, and the nematic phase liquid crystal composition may be used in liquid crystal display of TN mode, STN mode, TFT mode, PDLC mode, etc. In addition, the compound has facile material and simple synthesis path, and the process is suitable for industrial production.

The invention relates to a selective hydrogenation method for phenylacetylene in phenylacetylene-containing styrene material flow, which mainly solves the problem that excessive hydrogen in the selective hydrogenation process for the phenylacetylene possibly transforms the phenylacetylene and the styrene into an unexpected unsaturated product ethylbenzene so as to cause loss increment of the styrene. The invention adopts the technical scheme that raw materials and a palladium or nickel-containing catalyst in a catalyst bed layer undergo contact reaction in a gas-liquid-solid three-phase multi-section fixed bubbling bed reactor, wherein a gas distributor is arranged between the bottom of the fixed bubbling bed reactor and the catalyst bed layer; and the gas distributor comprises a gas mainand branch pipes, and the branch pipe is provided with at least one row of pores or the branch pipe is provided with at least one row of open short pipes, so the problem is well solved. The method can be used in the selective hydrogenation industrial production for the phenylacetylene in the phenylacetylene-containing styrene material flow.

The invention relates to a preparation method of doping type fluorescent micron-nano fibers, relating to a preparation method of fluorescent fibers and solving the problems of complex method realizing fluorescent light with different colors through the traditional organic fluorescent fibers of a monogenic dye, poor spectrum stability and short service life of physically blended organic fluorescent fibers and large diameters of the traditional organic fluorescent fibers. The preparation method of the doping type fluorescent micron-nano fibers comprises the following steps of: dissolving dialdehyde triphenylamine and poly [2-methoxyl-5(2'-ethylhexoxy) para-phenylacetylene] into a polymer solution according to different mass ratios; and then carrying out electrostatic spinning to obtain the doping type fluorescent micron-nano fibers. The doping type fluorescent micron-nano fibers have good fluorescence spectrum stability, long service life reaching two years and diameters of 10 nanometers-3 micrometers, and can be used in the life and highly technical fields of textile clothing, aviation, navigation, national defense industry, building decoration, transportation, night operation, daily life, amusement, leisure, optical-fiber communication, laser waveguide, and the like.

The present invention is new type of diphenyl acetenyl silane synthesizing process. By using phenyl acetylene, organic lithium reagent and methyl dichlorosilane as material and anhydrous tetrahydrofuran as solvent, the present invention synthesizes methyl diphenyl acetenyl silane monomer through two-step reaction. Phenyl acetylene and butyl lithium first react to produce phenyl acetenyl lithium, and phenyl acetenyl lithium and hydrogen-containing dichlorosilane then react to produce phenyl acetenyl silane. The present invention has simple technological process, simple and feasible operation, short reaction time, controllable reaction condition, high product yield and purity and other advantages, and is suitable for industrial production. The prepared diphenyl acetenyl silane may be used in high performance composite material, ceramic precursor, heat resistant coating, etc.

An improved method for applying polymeric antireflective coatings to substrate surfaces and the resulting precursor structures are provided. Broadly, the methods comprise plasma enhanced chemical vapor depositing (PECVD) a polymer on the substrate surfaces. The PECVD processes comprise providing a quantity of a polymer generated by introducing monomer vapors into a plasma state followed by polymerization thereof, with assistance of plasma energy, onto the surface of a substrate. The most preferred starting monomers are phenylacetylene, 4-ethynyltoluene, and 1-ethynyl-2-fluorobenzene. The inventive methods are useful for providing highly conformal antireflective coatings on large surface substrates having super submicron (0.25 μm or smaller) features. The process provides a much faster deposition rate than conventional chemical vapor deposition (CVD) methods, is environmentally friendly, and is economical.

The invention provides a dibenzo selenophene derivative and a preparation method thereof. The preparation method comprises the following steps that sodium hydride is used as a catalyst, malonic ester and propargyl bromide are added into an acetonitrile solvent, and a reaction is performed in an ice-water bath for 8-14 h to obtain a compound a; on the oxygen-free and water-free conditions, the compound a and a substituted complex of phenyl acetylene bromide are subjected to a reaction in an acetonitrile solvent under the effect of a catalyst and alkali at the temperature of 20-30 DEG C for 8-14 h to obtain a compound b; the compound b and diphenyl diselenide are subjected to a reaction at the temperature of 95-105 DEG C, and after separation and purification, the dibenzo selenophene derivative can be obtained. Compared with the prior art, the novel polysubstitution dibenzo selenophene synthesis method is provided, a series of novel selenophene derivatives are generated, multi-loops exist in the obtained dibenzo selenophene derivative compared with a common selenophene derivative, the structure is more complex and diversified, and wider application prospect is represented in chemical production and clinic medicine.

The invention discloses a method for synthesizing a diaryl acetylene monomer liquid crystal, which comprises a method for performing coupling reaction between halogenated aryl hydrocarbon and aryl alkyne, wherein the reaction conditions comprise that the halogenated aryl hydrocarbon and the aryl alkyne perform the coupling reaction in an acetone / water (5:2) solvent at a temperature of between 50 and 110 DEG C, under the normal pressure and under the protection of inert gas, and a catalyst used in the reaction is Pd / C-CuI-PPh3. The halogenated aryl hydrocarbon and the aryl alkyne are added according to an equivalent weight of 1 / 1.1, three substances in the catalyst Pd / C-CuI-PPh3 are added according to the equivalent weight of (0.0003-0.007) / (0.006-0.05) / (0.005-0.007), and preferentially, the molar percentage of the three substances relative to the halogenated aryl hydrocarbon or the aryl alkyne is 0.03 / 0.6 / 0.6. The method can also perform catalytic reaction by using a mother liquor of the filtered product and other solid matters of the coupling reaction to prepare the diaryl acetylene monomer liquid crystal continuously. The method provides a novel catalytic reaction system for synthesizing a diaryl phenylacetylene monomer liquid crystal, the catalyst is cheap and easy to obtain and can be used repeatedly, the separation and purification processes of the liquid crystal product are simple, the products after the reaction are directly filtered out, and the obtained monomer liquid crystal has stable quality and high yield and can greatly reduce the production cost and reduce the waste emission.

The invention discloses a CuBr2@Zr-MOF catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: loading CuBr2 with high catalytic activity into a Zr-MOFs skeleton with high stability to prepare a catalyst CuBr2@Zr-MOF with heterogeneous catalytic potential; determining the loading capacity of a catalyst structure and center metal copper ions through powder test and ICP test; exploring the catalytic property on three-component 'clicking' reaction among phenylboronic acid, sodium azide and phenylacetylene; performing universality inspection on arylboronic acid and alkyne containing various substituent groups; and through heterogeneous catalytic validation, discovering that the catalytic activity is not reduced obviously after thecatalyst is reused for four times, and expanding application of the CuBr2@Zr-MOF in the field of construction of organic heterocyclic ring through heterogeneous catalytic synthesis.

The invention discloses a fast reaction film formation method to prepare an eggshell type molybdenum carbide catalyst and belongs to the technical field of industrial catalysis. The method comprises the following steps: a carrier with a molybdenum oxide perssad adsorbed on the surface is added into a melamine solution, a film composed of a molybdenum carbide precursor is rapidly generated on the surface of the carrier through the fast reaction of melamine and the molybdenum oxide perssad, and the eggshell type molybdenum carbide catalyst is formed via pyrolysis of the film. According to the invention, the technology is simple, the thickness of the shell layer can be controlled, the energy consumption during the process is low, and the utilization rate and the stability of the active components in the prepared eggshell type molybdenum carbide catalyst are high and excellent. The eggshell type molybdenum carbide catalyst has excellent industrial application prospect and can be used for alkene-alkyne selective hydrogenation reaction and other reactions represented by phenylacetylene selective hydrogenation.

The present invention relates to one kind of polyfluoro substituted diphenyl acetylene derivative and its composition, preparation process and use as the liquid crystal material for display. The polyfluoro substituted diphenyl acetylene derivative has the general expression as shown, great optical anisotropy, relatively low viscosity, relatively wide nematic phase temperature range, excellent low temperature compatibility, facile material, and simple and feasible synthetic path, and is suitable for use as displaying liquid crystal material with improved response speed and driving voltage. The liquid crystal composition has excellent performance, including greatly improved response speed and low temperature compatibility, and may be used in liquid crystal display of TN mode, STN mode, TFT mode, etc.

The invention discloses a vehicle brake pad with a composite material. The vehicle brake pad comprises a steel sheet and a friction block; and the friction block includes raw materials of: boron modified phenolic resins, organic silicon modified phenolic resins, barium phenolic resins, phenylacetylene phenolic resins, terminal epoxy liquid reaction nitrile rubber, butadiene rubber, molybdenum disulfide, sisal fibers, carbon fibers, aluminum fibers, molybdenum fibers, polyphenylene benzodioxazole fibers, zinc oxide whiskers, montmorillonoid, vermiculite, nanometer aluminum oxide, cerium oxide, zirconium boride, aluminum silicate hollow spheres, oxidized graphene, copper powder, carbon nanotubes, nanometer carbon black, powder butadiene styrene rubber, ammonium molybdate, and octaphenyl silsesquioxane. The vehicle brake pad with the composite material is excellent in high-temperature resistance and heat resisting stability, high in wear resistance and long in service life.

The invention discloses high temperature-resistant epoxy resin. The high temperature-resistant epoxy resin comprises 100 parts of epoxy resin, 1-30 parts of a benzo six-membered heterocyclic compound, 5-10 parts of a curing agent and 70-90 parts of phenylethynyl silane. The phenylethynyl silane includes methyl-di(m-ethynylaniline)silane, dimethyl-di(m-ethynylaniline)silane, methyl-tri(m-ethynylaniline)silane, phenyl-tri(m-ethynylaniline)silane and tetra(m-ethynylaniline)silane. The epoxy resin has multiple functional groups. The multi-functional group epoxy resin, the benzo six-membered heterocyclic compound and the curing agent are evenly mixed at first; and then phenylacetylene silane is added into the acetone environment, and an epoxy resin system can be obtained after even mixing is completed. According to the high temperature-resistant epoxy resin disclosed by the invention, the thermal performance is improved by means of modification; and moreover, the volume shrinkage is lowered, and the resin has a good mechanical property.

The invention discloses a method for preparing propiolic acid compounds. An ionic type iron (III) complex containing monoimide functionalized imidazolium cations is taken as the single-component catalyst, carbon dioxide is taken as the carboxylation reagent, and various propiolic acid compounds are prepared through carboxylation reaction of terminal alkyne under normal pressure. The terminal alkyne substrate relates to phenylacetylene, substituted phenylacetylene, heterocyclic aryne, aromatic diyne or aliphatic series terminal alkyne. The method for preparing the propiolic acid compounds through carboxylation reaction of terminal alkyne and carbon dioxide under the catalysis of the iron-based catalyst is provided for the first time. Compared with the prior art, the method has the advantages that the catalyst is more environmentally friendly, synthesis is easier, reaction conditions are mild, and catalytic activity and functional group tolerance are unchanged or improved.

The invention relates to a method for removing phenylacetylene through selective hydrogenation in the presence of styrene, and mainly solves the technical problem of high loss rate of styrene in the prior art. Through the adoption of the technical scheme that hydrocarbon fractions containing phenylacetylene are taken as raw materials, and under the conditions that the reaction temperature is 15 to 100 DEG C, the weight space velocity is 0.01 to 100 hours <-1>, the mol ratio of hydrogen to phenylacetylene is (1 to 30) : 1, and the reaction pressure is -0.08 to 5.0 MPa, the raw materials are in contact with a metal oxide catalyst, and phenylacetylene in a reaction effluent is hydrogenated to form styrene, wherein the metal oxide catalyst comprises the following components in percent by weight: (a) 2 to 50.0 percent of metallic nickel oxide or other oxides, (b) 0.05 to 10 percent of at least one rare earth element oxide or other oxides, and (c) 49 to 85 percent of carrier, the invention solves the problem well, and can be used in the industrial production of removing phenylacetylene in the presence of styrene.

The invention discloses a catalyst for selective hydrogenation of phenylacetylene in styrene. According to the catalyst, Al2O3-SiO2, Al2O3 or SiO2 is used as a carrier, Ni serves as an active component, and at least one of metals of the IVB family in the periodic table of the elements, at least one of metals of the VIB family in the periodic table of the elements and at least one alkali metal and / or alkaline-earth metal are / is taken as an assistant(s); according to total 100% by mass of the catalyst, Ni accounts for 12%-21%, at least one of metals of the IVB family accounts for 0.6%-8%, the at least one of metals of the VIB family accounts for 0.5%-1.5%, and at least one alkali metal and / or alkaline-earth metal accounts for 5%-10%. By using the catalyst, after hydrogenation, the minimum content of phenylacetylene in C8 fraction is 0, the minimum loss of styrene is 0 or above and the generated colloid is less than or equal to 10mg / ml.

The invention belongs to the technical field of medical and chemical intermediates and relevant chemistry, and provides a preparation method of an environment-friendly quinoline compound. The preparation method is characterized in that a N-substituted polyaniline derivative serving as a raw material reacts with a phenylacetylene or styrene derivative in the presence of a Bronsted acid catalyst andan oxidizing agent and in the absence of a solvent at the temperature of 80 to 160 DEG C for 24 hours to obtain the quinoline compound. The preparation method has the beneficial effects of easiness and convenience in operation, mild conditions, environmental friendliness, probability of realizing industrial production and higher yield of the quinoline compound. The quinoline compound synthesizedby the preparation method can be further functionalized to obtain various compounds, and is applied to the development and researches of natural products, function materials and fine chemicals.

Crosslinkable liquid crystalline polymer compositions for use as dielectric materials in circuit materials, circuits, and multi-layer circuits are disclosed. The crosslinkable liquid crystalline polymer compositions comprise crosslinkable liquid crystalline polymers that preferably comprise end groups selected from the group consisting of phenyl maleimide, nadimide, phenyl acetylene, or combinations of the foregoing. Additionally, the crosslinkable liquid crystalline polymer compositions may further comprise particulate fillers and / or fibrous webs. The crosslinkable liquid crystalline polymer compositions provided improved electrical and mechanical properties.

The present invention is one new kind of phenylethynyl blocked polyaryl ether ketone pre-polymer and its preparation process and application in preparing high performance cross-linking material. Halogen substitured benzophenone compound is first prepared and then made to coupled with phenyl acetylene under the catalysis of Pd catalyst to prepare fluoric phenylethynyl blocked monomer, which is made to take nucleophilic substitution reaction with the branch unit of triphenol to synthesize the polyaryl ether ketone pre-polymer as phenylethynyl blocked branched compound. The branched compound may perform heat cross-liking reaction of the phenylethynyl radical at high temperature. The pre-polymer has excellent performance of forming spatial network structure via cross-linking.

The invention discloses a monomer containing a benzimide phenylacetylene structure. The monomer can enable self-crosslinking chemical reaction of a synthesized polymer under high temperature. The monomer containing a benzimide phenylacetylene structure and the structural units represented by I and II for synthesis of polyester can undergo random copolymerization to obtain high temperature self-crosslinked copolyester, and when the copolyester contains a PET structural unit, the characteristic viscosity number [eta] is 0.44-1.38dL / g, the vertical combustion UL-94 grade is from V-2 to V-0, the oxygen index LOI is 24.0-35.0%, and the cone calorimeter test peak heat release rate PHRR and the smoke release total amount are both lower than pure polyester. The invention also discloses a preparation method of the copolyester. The benzimide and phenylacetylene in the copolyester involved in the invention can generate synergistic cross-linking effect, so that the copolyester has very high flame-retardant and anti-dripping efficiency, and also the copolyester is endowed with excellent flame retardant, anti-dripping and smoke suppressing performance. The method provided by the invention is basically consistent with the synthesis method of conventional polyester, not only is mature in technology, and easy and convenient to operate, but also is easy to control and convenient for industrial production.

The invention provides a method used for preparing an unsaturated aromatic ester from phenylacetylene via carbonylation. According to the method, phenylacetylene, methanol, and carbon monoxide are taken as reaction raw materials, reaction temperature is controlled to be 30 to 90 DEG C, initial pressure is controlled to be 2 to 6MPa, a multifunctional polymer supported palladium-based catalyst is adopted, and carbonylation of phenylacetylene is catalyzed so as to synthesize the unsaturated aromatic ester. The solid multifunctional polymer (POL-2V-P, N-SO3H) is obtained via hinge polymerization of vinyl2-pyridine diphenylphosphine with vinylbenzene sulfonate under certain conditions, and the solid multifunctional polymer is used for complexing and immobilizing palladium acetate so as to prepare the multifunctional polymer supported palladium-based catalyst. Synthesis of the unsaturated aromatic ester from phenylacetylene via carbonylation is realized via one-step method, activity and selectivity are both high, corrosion on equipment is low, and separation and recycling are convenient to realize.

The invention belongs to the field of polymer materials, and relates to a polyether-ether-ketone polymer carbon fiber composite material containing a phenylacetylene side group and a preparation method thereof. The composite material consists of a polyether-ether-ketone polymer containing the phenylacetylene side group and a high-strength continuous carbon fiber, wherein the composite material comprises the following components in percentage by mass: 20-80% of the carbon fiber and the balance of the polyether-ether-ketone polymer. The preparation method comprises the following steps: firstly dissolving resorcinol or hydroquinone, 4-phenylacetylene phenylated hydroquinone and 4-4' difluorobenzophenone into a chloroform configuration adhesive solution, then preparing a carbon fiber / polymer prepreg tape by using a prepreg distributor, and finally performing compression molding. The composite material prepared by using the method disclosed by the invention has excellent mechanical performance, thermal performance and corrosion resistance, and combines the toughness of a thermoplastic resin based composite material and the advantages of a thermosetting resin based composite material so as to meet the requirements of the fields of supersonic aircrafts, military industries and high technologies; and moreover, the composite material is simple in preparation method, a production process is easy to operate, and production equipment is easy to achieve.

The invention belongs to the field of synchronization and application of light-emitting off-color materials, discloses a preparation method and application of a light-emitting off-color material with an information security storage function, and belongs to the field of application of visible light emitting off-color materials. The light-emitting off-color material is a complex prepared from platinum (II), 5,5'-di(trimethyl acetenyl)-2,2'-dipyridyl ligand and 3-bromo-phenylacetylene auxiliary ligand. According to different responses of color and light emission of the light-emitting off-color material to tetrahydrofuran steam, the material can be used in security storage of information. In addition, the material not only has advantages of high sensitivity, high security, high stability, visibility, low cost, good plasticity, easiness in operation, recyclable use and the like, but also has wide application prospects and relatively high commercial values in the field of information security materials.

The invention relates to an electrolyte applicable to a lithium titanate battery. The electrolyte comprises an organic solvent and lithium salt. The electrolyte further comprises one or more of phenylacetylene derivatives which account for 0.05-10wt% of the electrolyte. The structural formula of the phenylacetylene derivative is as shown in the specification, wherein in the specification, R1, R2 and R3 are independently selected from any one of hydrogen, hydroxyl, halogen, alkyl, alkoxyl, halogenated alkyl, halogenated alkoxyl, alkylene, halogenated alkylene, phenyl, halogenated phenyl, biphenylyl, halogenated biphenylyl, phenyl ether groups, halogenated phenyl ether groups, halogenated triphenyl, amido, ester groups and cyano groups. Halogen is any one of F, Cl and Br. Halogenation is partial substitution or full substitution. According to the electrolyte provided by the invention, the discharge capacity and circulating service life of the lithium titanate battery are improved by adding the phenylacetylene derivatives in the electrolyte. A swelling problem of the lithium titanate battery in the circulating process is further appropriately solved.

The invention discloses a high-temperature self-crosslinked flame retardant smoke suppressing molten drop-resistant copolyester based on a benzamide structure. The polyester is composed of structuralunits as shown in I, II and III or structural units as shown in I, II and IV through irregular copolymerization. The intrinsic viscosity [Aita] of the copolyester is 0.10-1.40 dL / g, the limit oxygen index is 21.0-40.0%, the vertical combustion grade is V-2-V-0 grade. The peak heat release rate p-HRR in a cone calorimetric test is reduced by 10-80% compared with that of pure PET, and the total smoke release amount is reduced by 5-70% compared with that of pure PET. The invention also discloses a preparation method thereof. By introducing a high-temperature crosslinked group as a benzamide groupor a benzamide phenylacetylene group, the corresponding copolyester is free of crosslinking action in processing and polymerizing processes, so that the thermoplastic workability of polyester is retained. Meanwhile, as a result of a tackifying effect and a high char forming property caused by self-crosslinking action at high temperature or combustion, the copolyester has excellent flame-retarding, smoke-suppressing and molten drop-resisting effects.

The invention discloses a conductive textile product. The conductive textile product comprises fiber with polyphenylacetylene combined on the surface. The content of the fiber combined with polyphenylacetylene in the conductive textile product is at least 30wt%. A preparation method of the conductive textile product comprises the steps that: AlCl3 is added into phenylacetylene, and the mixture is heated to 65-75 DEG C; after a reaction is carried out for 3-5min, fiber is delivered through the reaction liquid with a speed of 0.2-0.4m / s; and the fiber is heated for 3-5min under a temperature of 110-120 DEG C; and the fiber is cooled, washed, and spun, such that the e textile product containing at least 30wt% of fiber combined with polyphenylacetylene is obtained. The conductive textile product provided by the invention has good conductivity, washing resistance, and wear resistance.

The invention relates to a supermolecule type organic solar battery material and a preparation method thereof, and provides a new way for enhancing energy conversion efficiency. The supermolecule type organic solar battery material contains four basic structural units, namely a donor unit, a receptor unit, a connection unit and a self-assembly unit, wherein the connection unit and the self-assembly unit are different molecule structures or same molecule structures; the donor unit is one of thiofuran, phenylacetylene, diphenyl, aromatic amine, and a condensed nucleus aromatic compound or phthalocyanine or is one of derivants of the thiofuran, the phenylacetylene, the diphenyl, the aromatic amine and the condensed nucleus aromatic compound or the phthalocyanine; the receptor unit is one of fullerene and perylene or a carbon nano tube or is one of derivants of the fullerene and the perylene or the carbon nano tube; the selection of the connection unit is split into two types according to an energy level matching condition: a. an insulation type connection unit which prevents the movement of electrons and holes; and b. a connection type connection unit which is good for the transfer of the electrons when a receptor is excited, good for the transfer of the holes when a donor is excited and good for the transfer of the electrons and the holes when a connection group is excited.

The invention discloses a heterogeneous catalyst for a selective hydrogenation reaction of an alkyne compound and an application thereof. The heterogeneous catalyst comprises, by weight, 1 to 10% of noble metal particles, 9 to 90% of a titanic oxide and 9 to 90% of porous carbon. Compared with the common commercial activated carbon supported Pd catalyst or titanium dioxide supported Pd catalyst, the heterogeneous catalyst has obvious synergistic effects in catalysis of a selective hydrogenation reaction for preparing an alkyne compound. The porous carbon can promote the diffusion of the substrate, further adjust and control the interaction between the noble metal particles and titanium oxide, realize charging of noble metal particles and improve the alkyne compound hydrogenation catalyticactivity and selectivity. The heterogeneous catalyst has styrene selectivity of greater than 95% and a phenylacetylene conversion rate of 100% in catalysis of a selective hydrogenation reaction for preparing an alkyne compound.

The invention relates to a catalyst for selective hydrogenation of phenylacetylene in the presence of styrene, which mainly solves the technical problems of low phenylacetylene hydrogenation rate and high styrene loss rate in the prior art. The catalyst for selective hydrogenation of phenylacetylene in the presence of styrene comprises the following components in percentage by weight: 2 to 50% of metallic nickel or oxide thereof, 0.05 to 10% of at least one element which is chosen from rare earth or oxide of the element, 0.01 to 6% of at least one element which is chosen from IB, IIB, VIB or VIIB in the periodic table of elements or oxide of the element and 49 to 85% of carrier which is a complex carrier chosen from alumina and silicon oxide, and the weight ratio of the alumina to silicon oxide is 0.01 to 100:1. The catalyst for selective hydrogenation of phenylacetylene in the presence of styrene can solve the problem well, and can be used for industrial production of hydrogenation removal of phenylacetylene in the presence of styrene.