30results about How to "Does not affect catalytic activity" patented technology

The invention relates to a preparation method of composite catalyst of the titanium silicate molecular sieve and the nano-carbon fiber. The composite catalyst of the titanium silicate molecular sieve and the nano-carbon fiber prepared by the method of the invention has strong bonding force between the active component of the titanium silicate molecular sieve and the nano-carbon fiber. Comparing with the industrial micro-nano TS-1 powder (100-500nm), the filtering quality is significantly improved. In the course of using the TS-1 catalyst, the problem of the solution dispersion and separation can be solved; the method is simple and the application range is wide. The catalytic performance of the made composite catalyst is excellent, and can be used for the cyclohexanone ammoximation, the conversion rate of the cyclohexanone and the cyclohexanone oxime selectivity can both reach over 98 percent.

The invention belongs to the technical field of catalysts and especially relates to a preparation method for an efficient load type ozone oxidation catalyst. The preparation method for the efficient load type ozone oxidation catalyst provided by the invention comprises five processes of preparing a titanium sol solution, preparing a template agent sol solution, preparing a mesoporous titanium dioxide molecular sieve precursor, de-molding the mesoporous titanium dioxide molecular sieve precursor and loading a MnO2 active component. According to the invention, a self-prepared mesoporous titanium dioxide molecular sieve is used as a carrier, a Mn metallic oxide catalyst is loaded into an inner pore structure of a titanium molecular sieve, the molecular sieve is composed of active components, the content of the active components in the catalyst material is ultrahigh, the removal rate of the pollutants is high, the catalytic activity is high, the active component loss is less and the catalyst has an obvious catalytic effect in ozone oxidation treatment for antibiotic wastewater, such as, chloramphenicol wastewater, penicillin wastewater, erythrocin wastewater, streptomycin wastewater, vancomycin wastewater and pipemidic acid wastewater.

The invention belongs to the technical field of biological detection and relates to a novel method for detecting the activity of hydrogen sulfide synthetase by using a hydrogen sulfide fluorescence probe as well as an application approach of the method. The method is suitable for detection of the activity of hydrogen sulfide synthetase such as CBS, CSE and CL, and comprises the following steps: shearing a tissue sample into small blocks, grinding, performing cell lysis in a tissue cell lysis solution, performing protein quantification on a lysis product, as the drawings, adding a reaction system (comprising the tissue cell lysis product, L-cysteine and 5-pyridoxal phosphate) into a reaction pool on an outer ring of a reaction bottle, and adding an absorption system (comprising operating fluid of the H2S fluorescence probe containing a reaction adjuvant cetrimonium bromide) into an absorption pool on an inner ring of the reaction bottle, wherein H2S gas molecules generated in the reaction system are combined with the fluorescence probe in the absorption system, the system can be used for fluorescence assay and fluorescence imaging, the H2S content is quantitatively detected, and the activity of the H2S synthetase is intuitively reflected. The invention can provide a good method for research of H2S-related signal paths and significance and diagnosis of H2S in disease processes.

The invention belongs to the technical field of medical materials, and relates to preparation of drugs for catalytic treatment of tumors, in particular to a hyaluronic acid modified FeCo bimetal synergistic monatomic catalyst as well as a preparation method and application of the hyaluronic acid modified FeCo bimetal synergistic monatomic catalyst. The hyaluronic acid modified FeCo bimetal synergistic monatomic catalyst is prepared by the following steps: firstly, synthesizing a FeCo bimetal synergistic monatomic catalyst; the FeCo bimetal synergistic monatomic catalyst can play a synergistic role, so that the catalytic efficiency is remarkably improved. By adopting the hyaluronic acid coated FeCo bimetal synergistic monatomic catalyst, the antitumor activity is remarkably improved and the toxicity to normal tissues is effectively avoided while the catalytic activity is not influenced and the water solubility is increased, so that the biomedical application of the FeCo bimetal synergistic monatomic catalyst is expanded, efficient catalytic tumor treatment is realized, great potential and prospects are realized in the aspect of tumor treatment application.

The invention discloses a titanium-containing molecular sieve composite material which is characterized in that: the composite material contains Silicalite-1 used as a matrix and also contains silicon, titanium and oxygen elements; based on oxides, the molar ratio of silicon to titanium is 1:>(0-0.05); the X-ray diffraction spectra of the composite material shows the characteristic diffraction peaks of an MFI (Mobil Five) structure; and in the TEM (Transmission Electron Microscopy)-spectrum microscopic composition of the composite material, the molar ratio of TiO2 to SiO2 of the composite material at the edge of which a target is located is more than 150% that of the composite material in the center of which a target is located. The invention also discloses a preparation method of the titanium-containing molecular sieve composite material.

The invention relates to a load type visible light photocatalyst and a preparation method thereof. Polyvinylpyrrolidone (PVP) and polyving akohol (PVA) are weighed according to the mass ratio at the room temperature, deionized water is added for dissolution, the PVP and the PVA are heated in a water bath at 90 DEG C and stirred till the PVP and the PVA are completely dissolved, Ag / AgBr / TiO2 visible light photocatalyst powder is added while the temperature is maintained, and the Ag / AgBr / TiO2 visible light photocatalyst powder is evenly dispersed into the PVA and PVP mixed solution; and after the solution is cooled to the room temperature, a cross-linking agent and a catalyst are added for immobilization, gel is formed, and the gel can be cut into small cubic integrated visible light photocatalysts of certain sizes as needed. By the adoption of the load type visible light photocatalyst and the preparation method thereof, the problems that a powder material is difficult to recycle, secondary pollution is caused, and the photocatalysis efficiency is low after immobilization are solved, and the load type visible light photocatalyst and the preparation method thereof are used for the field of treatment of water pollution which is difficult to treat and is high in organic matter content. Complex hydrogel carriers have higher moisture content and have better diffusivity to the visible light photocatalyst powder, the contact area between the powder and organic matter is increased, the photocatalysis efficiency of the visible light photocatalyst is improved, and recycling and reutilization are achieved.

The invention discloses a green synthetic magnetic composite nano material which is characterized by being prepared from the following components in parts by mass: ellipsoidal solid particles prepared by self-assembly, ferrous sulfate heptahydrate, a green tea extracting solution, tea residues and calcium alginate in a ratio of 1:(4-6):(0.6-0.8):(1.8-2.5). The invention also discloses a preparation method and application of the composite nanomaterial. According to the method, ferrous salt is taken as a raw material, calcium alginate is taken as a coating agent, a green tea extracting solution is taken as a reducing agent and a dispersing agent, and the calcium alginate-coated nano-iron composite material is synthesized in a green manner by controlling reaction conditions and the material adding amount and is applied to rapid removal of Cr<6+> and methylene blue in a water body. The nanomaterial has the advantages of being wide in raw material source, simple and convenient in synthesis method, stable in material performance, wide in application range, good in pollutant adsorption effect, free of secondary pollution and the like, can be suitable for emergency treatment of pollutants in large-volume environmental water bodies, and can also be used for deep purification of general domestic sewage, environmental water bodies and drinking water bodies.

The invention relates to a preparation method and application of a porous carbon coated PdFe / C alloy nano-frame. According to the preparation method, 1-naphthylamine (C10H9N), adopted as a coordination agent, forms a Pd(II)-(C10H7-NH2) flaky yellow precipitate complex with PdCl2; the Pd(II)-(C10H7-NH2) flaky yellow precipitate complex is arranged in an aqueous solution of FeCl3 so as to be subjected to ultrasonic mixing; an obtained mixture is stirred for a long time, so that Fe<3+> can be fully adsorbed on the surface of the flaky precipitate, and an obtained Pd(II) / Fe(III)-(C10H7-NH2) flakyyellow-green precipitate is arranged in an inert atmosphere so as to be subjected to high-temperature heat treatment, so that the porous carbon coated PdFe / C alloy nano-frame can be obtained. The porous carbon coated PdFe / C alloy nano-frame prepared by the method has the advantages of ultrafine particle size of PdFe alloy, adjustable compositions, high electrochemical activity, high stability, simple preparation process, convenience in batch production, environmental friendliness and the like. The porous carbon coated PdFe / C alloy nano-frame shows higher electrocatalytic activity and stabilitywhen being used as a cathode oxygen reduction catalyst under an acidic condition.

The invention discloses a catalyst for one-step synthesis of dimethyl ether by synthesis gas for synthesis and a method for preparing the same, which belong to the technical field of catalyst. The general formula of the catalyst is CuZnAlMg(O)-gamma-Al2O3, wherein in the CuZnAlMg(O), Cu / Zn / Al is equal to (58 to 62) / (26 to 21) / (16 to 17), Mg / Cu is equal to between 1 / 10 and 1 / 5, and gamma-Al2O3 / CuO (mass ratio) is equal to between 1.7 / 1 and 2 / 1. The catalyst can be prepared by a method of two-step coprecipitation and deposition. Compared with the same catalyst without an auxiliary agent, the catalyst in the invention has higher dimethyl ether yield and lower carbon dioxide selectivity under high temperature condition.

The invention discloses a triethylenediamine (TEDA) crystal and a preparation method thereof. The method comprises the following steps: (1) adding a TEDA crude product into a solvent to obtain a TEDAsuspension solution; (2) heating the suspension solution obtained by step (1) to dissolving temperature of 60 to 70 DEG C to completely dissolve a solid; then slowly cooling; after separating out a seed crystal, culturing the crystal for 0.5 to 2 hours at a place with the temperature which is 2 to 4 DEG C lower than the dissolving temperature; (3) after finishing constant-temperature crystal culture, continually cooling to 20 to 30 DEG C, preferably 23 to 28 DEG C; filtering and drying to obtain the TEDA crystal. The granularity of 85 weight percent or more of the TEDA crystal is 800 to 1,000mu m, the purity is 99.3 to 99.8 weight percent, the water content is lower than 2 weight percent and the repose angle is 36 degrees to 40 degrees. The TEDA crystal has the advantages of large particles, good mobility, poor moisture absorption, easiness for separation and drying, and meets the requirements of transportation and storage.

The invention relates to the technical field of molecular biology, in particular to a preparation method and application of a Pt-based alloy / MOFs catalyst with high hydrogenation selectivity. A Pt alloy / MOFs structure in which Pt alloy particles are uniformly loaded on the surface of MOFs is prepared through a one-step solvothermal method; the preparation method is simple, the reaction environment is not harsh, and no special atmosphere is needed. The obtained product is unique in structure, metal particles are small in size, uniform in distribution and not prone to loss, and meanwhile the catalytic activity of metal cannot be affected. In the aspect of catalytic performance, the Pt alloy / MOFs catalyst prepared by the invention can be used for catalytic hydrogenation of cinnamyl aldehyde at normal temperature and normal pressure, and is excellent in performance. In addition, the catalyst can also catalyze selective hydrogenation of 3-nitrostyrene, which proves that the catalyst provided by the invention has wide application.

The invention provides a methane low-temperature combustion catalyst for a boiling-bed reactor as well as a preparation method and application of the methane low-temperature combustion catalyst. The methane low-temperature combustion catalyst consists of alumina supporters and active components, wherein the alumina supporters are alumina microspheres generated from aluminum hydroxide through high-temperature roasting, the alumina microspheres comprise spherical supporters of kappa-Al2O3, delta-Al2O3, theta-Al2O3 or alpha-Al2O3; the active component is a perovskite type composite metal oxide. The alumina supporters provided by the invention have relatively large specific surface areas and are relatively high in water absorption rate, so that the loading capacity of the active component on the support can be increased, the active component is not liable to drop off, secondly, the roasted alumina supporters can directly load the active component by using an impregnation method, the preparation process is simple, the active components are uniformly distributed, the stability is high, in addition, the catalyst provided by the invention is high in catalytic activity, good in mobility and high in bulk density and can be used in the boiling-bed reactor.

The invention discloses a catalyst for one-step synthesis of dimethyl ether by synthesis gas for synthesis and a method for preparing the same, which belong to the technical field of catalyst. The general formula of the catalyst is CuZnAlMg(O)-gamma-Al2O3, wherein in the CuZnAlMg(O), Cu / Zn / Al is equal to (58 to 62) / (26 to 21) / (16 to 17), Mg / Cu is equal to between 1 / 10 and 1 / 5, and gamma-Al2O3 / CuO(mass ratio) is equal to between 1.7 / 1 and 2 / 1. The catalyst can be prepared by a method of two-step coprecipitation and deposition. Compared with the same catalyst without an auxiliary agent, the catalyst in the invention has higher dimethyl ether yield and lower carbon dioxide selectivity under high temperature condition.

The invention discloses a catalyst used for cathode reaction of a fuel cell and a preparation method thereof. Firstly, an imidazole compound and zinc nitrate are treated in a solution, in a standing manner, to prepare a porous metal organic framework; then transition metal ions are adsorbed by the metal organic framework; further, high temperature treatment is carried out to reduce the transitionmetal ions into metal nanoparticles having uniform particle size and being coated with a carbon layer, thus preparing the catalyst. The non-noble metal composite catalyst is prepared with the metal organic framework and inorganic salt being precursors, so that on the basis of guaranteeing catalytic activity and stability of the catalyst, the cost of the catalyst is reduced. The method is simple and is suitable for industrial production.

The invention relates to the field of alkylation catalysts, and concretely provides a modified extruded catalyst used for an alkylation reaction. The catalyst comprises a formed body and a molecular sieve membrane wrapping the surface of the formed body, the molecular sieve membrane has a shape selective effect on the alkylation reaction and is not reactive, and the formed body comprises an alkylation reaction active component. The invention also provides a preparation method of the catalyst. The method comprises the following steps: mixing raw materials of the molecular sieve membrane having a shape selective effect on the alkylation reaction and being not reactive with the formed body, crystallizing the obtained mixture, separating a solid from obtained crystallization liquid, and roasting the solid after or without drying, wherein the formed body comprises the alkylation reaction active component. The invention further provides an application of the catalyst in the alkylation reaction, such as a toluene alkylation reaction. The catalyst has the advantages of good shape selection effect, high target product yield and high catalysis activity.

The invention discloses a self-supporting noble metal nanosheet with the equal thickness of a monatomic layer and a preparation method of the nanosheet. The self-supporting noble metal nanosheet with the equal thickness of a monatomic layer is prepared by the following steps of: with noble metal salt as a precursor, polyvinylpyrrolidone as a surface active agent and alcohol as a solvent, carrying out adsorption on a special crystal surface of the noble metal by utilizing an aldehyde group of an aldehyde compound, and reducing by utilizing a hydrothermal method to obtain the self-supporting noble metal nanosheet. The utilized reaction precursor is easy to obtain, the technique is simple, the repeatability is good and the cost is low. In a structure for preparing the self-supporting noble metal nanosheet, all noble metal atoms are surface atoms and are stably placed in a hexa-coordinate state, the noble metal nanosheets are uniformly distributed in a polar solvent, and the polyvinylpyrrolidone is adsorbed on the surface of the self-supporting noble metal nanosheets. The self-supporting noble metal nanosheet is of important application prospect in catalysis; and simultaneously, the self-supporting noble metal nanosheet also is an ideal mould material in respect of intrinsic physical property, and can be applied to researching basic physical phenomenon and mechanisms of intrinsic two-dimensioanl metal electronic gas and the like.

The invention discloses an adhesive, which includes component A, component B and silica sol. The component A consists of 20-60 parts by weight of methyltrimethoxysilane and 10-40 parts by weight of dimethyldimethoxysilane. It consists of 3-12 parts by weight of ester solvent, 0.1-3 parts by weight of ethylene glycol butyl ether, 5-15 parts by weight of ester plasticizer and 2-10 parts by weight of methanol; component B is composed of methyltrimethoxy It consists of 45-75 parts by weight of silane, 10-40 parts by weight of dimethyldimethoxysilane, 0.5-5 parts by weight of cross-linking agent, 1-6 parts by weight of methanol and 1-7 parts by weight of solvent; the component A is : The weight ratio of component B: silica sol is 0.01-0.3:0.5-1.5:1. The invention provides a preparation method of the binder, and uses it to bond and mold catalysts on plate, honeycomb and corrugated plate catalyst carriers without affecting the catalytic efficiency of the catalyst.

The invention discloses a short-chain alcohol intermediate for efficiently preparing high-molecular-weight polyether synthetic oil as well as a preparation method and application of the short-chain alcohol intermediate, and the short-chain alcohol intermediate is prepared by carrying out polymerization reaction on short-chain alcohol serving as an initiator and epoxide under the action of a catalyst. The preparation method is low in byproduct content, narrow in molecular weight distribution, simple in production process, free of aftertreatment and high in yield. Meanwhile, the short-chain alcohol intermediate prepared by the method disclosed by the invention is weakly acidic, so that a weakly acidic condition required by DMC catalysis in the preparation process of high-molecular polyether synthetic oil can be met, the short-chain alcohol intermediate can be directly subjected to polymerization reaction with epoxide without treatment and is not easy to inactivate, and relatively high reaction activity is maintained; meanwhile, the materials can be directly discharged without neutralization, so that the narrow-distribution high-molecular-weight oily polyether is finally prepared. Meanwhile, the short-chain alcohol intermediate is low in ion content, so that the catalytic activity of the catalyst is not influenced, and the defect of refining treatment by adopting a base catalyst is avoided.

The invention belongs to the field of biological catalysis, and particularly relates to an immobilization method for horse radish peroxidase and application thereof. The carrier used by immobilized horse radish peroxidase is aminated mesoporous silicon dioxide nanoparticles, and the horse radish peroxidase is immobilized by a physical adsorption method. After amination, the amount of the peroxidase adsorbed by the mesoporous silicon dioxide nanoparticles is increased, and thereby the stability of the peroxidase is increased to a certain degree. The immobilized horse radish peroxidase is applied in the treatment of phenol compounds in sewage.

The invention belongs to the technical field of biological detection, relates to a new method for detecting the activity of hydrogen sulfide synthase with a fluorescent probe of hydrogen sulfide, and provides an application path of the method. It is suitable for detecting the activity of hydrogen sulfide synthase including CBS, CSE and CL. For tissue samples, first cut into small pieces and then grind. For cells, tissue cell lysate is used for lysing, and the lysate is used for protein quantification. As shown in the figure, the reaction system ( Tissue cell lysates, L-cysteine, 5-pyridoxal phosphate) were added to the reaction pool on the outer ring of the reaction flask, and the absorption system (H2S fluorescent probe working solution containing reaction adjuvant alkane ammonium bromide) was added to In the absorption pool in the inner ring, the H2S gas molecules produced by the reaction system are combined with the fluorescent probes of the absorption system, which can be used for fluorescence measurement and fluorescence imaging, quantitatively detect the H2S content, and more intuitively reflect the activity of H2S synthase. The invention can provide a good research method for studying H2S-related signaling pathways and the significance and diagnosis of H2S in some disease processes.

The invention discloses a triethylenediamine (TEDA) crystal and a preparation method thereof. The method comprises the following steps: (1) adding crude TEDA to a solvent to obtain a TEDA suspension; (2) heating the suspension obtained in step (1) to a dissolution temperature of 60-70° C. to completely dissolve the solid, and then Slowly lower the temperature. After the seeds are precipitated, grow the crystals at a constant temperature of 2-4°C lower than the dissolution temperature for 0.5-2h; (3) After the constant-temperature crystal growth is completed, continue to cool down to 20-30°C, preferably 23-28°C, and filter , dried to obtain TEDA crystals. The TEDA crystal has a particle size of 800-1000 μm above 85 wt%, a purity of 99.3-99.8 wt%, a water content of less than 2 wt%, and an angle of repose of 36°-40°. The TEDA crystals are large particles, have good fluidity, poor hygroscopicity, are easy to separate and dry, and meet the requirements of transportation and storage.

The invention discloses a polyoxometalate composite particle electrode and its preparation method and application. The preparation method of the catalyst of the invention is as follows: PMO 12 , iron salt and CH 3 Dissolve COOK in ultrapure water, stir and mix evenly to form solution A; add an equal volume of methanol to solution A, then add mesoporous titanium dioxide molecular sieve, stir and react at 1~60°C for 12~72h, and make iron salt and PMO 12 Reaction to form FePMO 12 The active ingredient is loaded on the mesoporous titania molecular sieve, filtered, and the filter residue is dried to obtain the mesoporous titania molecular sieve loaded FePMO 12 The material is the polyoxometalate composite particle electrode. The polyoxometalate composite particle electrode provided by the invention is used as a particle electrode of a three-dimensional electrode, so that it has the advantages of high electrocatalytic performance, high current utilization efficiency, corrosion resistance and the like.

The invention relates to the technical field of molecular biology, in particular to a preparation method and application of a highly hydrogenation-selective Pt-based alloy / MOFs catalyst. The invention prepares a Pt alloy in which Pt alloy particles are evenly loaded on the surface of MOFs by a one-step solvothermal method. / MOFs structure, the preparation method of the present invention is simple, and the reaction environment is not harsh and does not require a special atmosphere, the obtained product has a unique structure, the metal particle size is small, the distribution is uniform, and it is not easy to lose, and it will not affect the catalytic activity of the metal. In terms of catalytic performance, the Pt alloy / MOFs catalyst prepared by the present invention can catalytically hydrogenate cinnamaldehyde at normal temperature and pressure, and has excellent performance. In addition, the catalyst can also catalyze the selective hydrogenation of 3-nitrostyrene, which proves that the catalyst of the invention has a wide range of applications.

The invention belongs to the technical field of catalysts, and particularly relates to a preparation method of an ozone oxidation catalyst. The invention provides a method for preparing a high-efficiency loaded ozone oxidation catalyst, which includes the preparation of titanium sol solution, the preparation of template sol solution, the preparation of mesoporous titanium dioxide molecular sieve precursor, the demoulding of mesoporous titanium dioxide molecular sieve precursor and MnO 2 There are five processes for loading active components. The present invention uses self-made mesoporous titanium dioxide molecular sieve as a carrier to load the Mn metal oxide catalyst into the internal pore structure of the titanium molecular sieve. The molecular sieve is also the composition of the active component. The active component in the catalytic material Extremely high component content, high pollutant removal rate, high catalytic activity, and low loss of active components. It is suitable for chloramphenicol wastewater, penicillin wastewater, erythromycin wastewater, streptomycin wastewater, vancomycin wastewater and pipemidic acid wastewater. The antibiotic wastewater is subjected to ozone catalytic oxidation treatment, which has obvious catalytic effect.

A bionic catalytic filter material and its preparation method and application belong to the technical field of environmental protection and catalysis. Firstly, the commercial vanadium-titanium catalyst or manganese-based catalyst is superhydrophobic modified with low surface energy substances to obtain a superhydrophobic catalyst solution. After rotary evaporation and freeze-drying, superhydrophobic catalyst particles are obtained, and then water-based acrylic resin and PTFE are added to the superhydrophobic catalyst solution. The resin is mechanically stirred and mixed evenly, combined with the dust filter bag by dipping and rolling, and the bionic catalytic filter material is obtained after high temperature curing. The biomimetic catalytic filter material prepared by the present invention has a gas and dust emission concentration lower than 10 mg / m under normal working conditions 3 , the running resistance is less than 1000Pa, the filtration efficiency is greater than 99.99%, the denitrification efficiency is greater than 90%, and the service life is greater than 4a, meeting the latest environmental protection requirements. It can realize the integrated removal of dust and nitrate in the flue gas, thereby reducing the space required for dust removal and denitrification equipment, reducing the flue gas treatment process, reducing costs, and improving the service life of the catalyst, so that SCR technology can be applied on a large scale.

The invention relates to a preparation method of composite catalyst of the titanium silicate molecular sieve and the nano-carbon fiber. The composite catalyst of the titanium silicate molecular sieve and the nano-carbon fiber prepared by the method of the invention has strong bonding force between the active component of the titanium silicate molecular sieve and the nano-carbon fiber. Comparing with the industrial micro-nano TS-1 powder (100-500nm), the filtering quality is significantly improved. In the course of using the TS-1 catalyst, the problem of the solution dispersion and separation can be solved; the method is simple and the application range is wide. The catalytic performance of the made composite catalyst is excellent, and can be used for the cyclohexanone ammoximation, the conversion rate of the cyclohexanone and the cyclohexanone oxime selectivity can both reach over 98 percent.

A process for preparing gasoline through synthesis gas is characterized in that pressurized synthesis gas is sent into a slurry bed reactor loaded with a catalyzer for synthesizing dimethyl ether to synthesize dimethyl ether, gas coming from the slurry bed reactor directly enters into a fixed bed reactor loaded with a catalyzer for synthesizing gasoline to synthesize gasoline, one part of mixed gas coming from the fixed bed reactor enters into a gas-liquid separator after being preheated for synthesizing gas through a heat exchanger, the rest part of the mixed gas enters into the gas-liquid separator after the heat of the rest part is recycled through an exhaust boiler, then liquid phase and gas are obtained after separation, the liquid phase comprises gasoline and water, one part of gas is discharged or used for other purposes, and the other part of gas circulates and returns to the slurry bed reactor through a compressor. The process provided by the invention has the advantages that the conversion per pass of the synthesis gas is high, energy consumption is low, the cost is low, and the service life of the catalyzer is long.