74results about How to "Overcome the disadvantage of instability" patented technology

The invention discloses a method for manufacturing a positive pole plate of a lithium-ion capacitor, comprising the following steps: 1) coating size containing super capacitor active materials on an aluminum foil current collector, and drying; 2) coating positive pole size of a lithium ion battery on the aluminum foil current collector containing super capacitor active materials; and 3) drying, cold pressing, drying again, cutting into pieces and stripping to prepare the positive pole plate of the lithium-ion capacitor. The method for manufacturing positive pole plates of lithium-ion capacitors is easily operated, overcomes the shortcomings of unstable size when the positive pole materials of the lithium ion battery and the active materials of the super capacitor active materials are mixed, and is easy for batch production. In addition, the invention also discloses the positive pole plate of a lithium-ion capacitor and the lithium-ion capacitor using the same.

Production of inorganic polymer coagulating agent is carried out by controlling Fe2+ concentration between 75-90g / L in hydrochloric acid pickling effluent, taking it as ferric source, taking calcium aluminate powder as aluminum source with Al2O3 content 47-56 wt%, putting two kinds of raw material into reactor in proportion of calcium aluminate powder: hydrochloric acid pickling effluent=0.05-0.10, reacting while agitating at 50-80 degree for 1-3 hrs, adding into minor chlorate oxidant and phosphate stabilizer, heating, reacting while agitating, and cooling to room temperature to obtain final product. It's simple and can be used for domestic sewage and industrial effluent treatment.

The invention provides a sulfide solid electrolyte based on oxygen doping. The sulfide solid electrolyte is prepared from the chemical ingredients, in percentage by mass: 36-60% of lithium sulfide orlithium selenide, 18-48% of phosphorus pentasulfide or phosphorus selenide, 1-23% of metal oxide or specific nonmetallic oxide and 8-37% of lithium chloride, lithium bromide or lithium iodide. The preparation method of the sulfide solid electrolyte mainly comprises the steps that the raw materials are sufficiently blended and subjected to tabletting, then placed in a quartz tube to be burned and sealed, the product is placed in a muffle furnace and heated to be 400-600 DEG C at a slow heating rate, the optimal heating rate is 0.3 DEG C / minute, heat preservation is conducted for 12-48 hours, and then the product is cooled to reach the room temperature; and the product is ground to be powder, and the sulfide solid electrolyte based on oxygen doping is prepared. The sulfide solid electrolyteis easy to prepare and high in repeatability, the prepared solid electrolyte has the high ionic conductivity and good stability to the air and positive and negative electrodes.

The invention discloses an image perceptual hashing method based on two-sided random projection, which mainly solves the problem of quick searching of massive image data. The method comprises the following steps of (1) preprocessing original image data; (2) obtaining a two-sided random projection matrix; (3) carrying out low-rank approximating; (4) updating a low-rank matrix; (5) judging if the number of iteration times of the updated low-rank matrix is maximum or not; (6) grouping projection vectors; (7) orthogonalizing the projection vectors; (8) obtaining hashing codes; (9) obtaining a hamming distance; and (10) outputting test results. The hashing method has the advantages that the better projection vector can be obtained, the effective hashing codes can be obtained, the memory consumption is reduced, the searching time is saved, the comprehensive performance of precision ratio and recall ratio of image searching can be improved, and the hashing method is applied to the image searching services of electronic businesses and mobile terminal equipment.

The invention discloses an intelligent energy-saving system for controlling the wireless internetworking of office building environment, which comprises a central controller and area control subsystems. End control equipment is arranged in each area control subsystem; the central controller is connected with a wireless coordinator; each end control equipment is in signal connection with a wireless routing controller which is in signal connection with the wireless coordinator; and the end control equipment, the wireless routing controller and the wireless coordinator are all based on a ZigBee communication protocol and meet IEEE802.15.4 standard. The intelligent energy-saving system solves the technical problem that a relatively larger measurement and control network cannot be formed in a conventional wireless control system, also solves the problems of the high power consumption, low rate and high cost of the conventional building intelligent control system, ensures that manual control is effective when equipment communication or control is at fault and avoids the paralysis of the whole system.

The invention discloses a mixed model judgment based crystallizer breakout predication method. The mixed model judgment based crystallizer breakout predication method comprises the following steps of:1) acquiring real-time temperatures of thermocouples inside a crystallizer, and sending the real-time temperatures to a computer terminal; 2) correcting the acquired temperature values and modelling,and converting the temperature values into an DIB image to store; 3) performing discretization on the DIB image, and obtaining crystallizer temperature fields through a thermal imaging system; 4) performing image identification and classification on a temperature field distribution image, and judging whether the temperature of each thermocouple of the crystallizer is normal or not; and 5) comprehensively judging whether the temperature has anomaly or not, and judging the anomaly reasons according to the image identification results and the results of a comprehensive expert system, thereby predicating whether a crystallizer breakout phenomenon appears or not. The mixed model judgment based crystallizer breakout predication method realizes accurate predication and warning of crystallizer breakout during continuous-casting production, and improves quality of continuously cast slabs.

The invention relates to high-chlorine-content oil hydrogenation dechloridation catalyst and a preparation method thereof. The method comprises the steps of first preparing a molecule sieve-MgAl2O4-Al2O3 composite carrier containing an assistant P, impregnating the carrier with the water-soluble compound of an active component Ni or Co and Mo, W and the assistant Ce, drying and roasting the carrier, and preparing the hydrogenation dechloridation catalyst. The content of each component of the catalyst is as follows in percentage by weight: 2 to 5 percent of NiO or CoO, 5 to 10 percent of MoO3, 4 to 10 percent of WO3, 2 to 4 percent of assistant P2O5, 1 to 2 percent of CeO2, and the balance of composite carrier. The catalyst is good in activity and stability, the organic chloride in the oil can be removed under a mild condition, and the removing rate is more than 99 percent.

The invention discloses a synthesis method of peroxide mimic enzyme nano-catalysis particles. The synthesis method comprises the following steps: performing a synthesis reaction on a solution containing a gold source and a palladium source in the presence of a stabilizing agent and a reducing agent to obtain nano gold-palladium alloy particles serving as the peroxide mimic enzyme nano-catalysis particles, wherein the molar ratio of the gold source to the palladium source is (1:5)-(5:1); the molar ratio of the reducing agent to the gold source and palladium source together is (5:1)-(1:20); the stabilizing agent is citrate; the reducing agent is citrate or NaBH4. The synthesis method disclosed by the invention is used for synthesizing stable nano gold-palladium alloy particles with surface plasmon resonance effect and peroxide mimic enzyme activity. The nano gold-palladium alloy particles have stable properties and obvious and stable surface plasmon resonance peak; the optimal pH for the enzyme activity is 3, and the requirement for ion strength in the reaction is not high; the synthesis method can be applied to the peroxide catalysis in a protein denaturation environment and has excellent application potential in the fields of analysis and molecular computation.

An unmanned lunar ascender launch base stabilizer suitable for complex conditions comprises a launch base, upper sections and lower sections of supporting legs, trust reversers and supporting feet. The launch base is a platform, and the upper surface of the launch base is provided with a lunar lander upgrader. The lower section of each supporting leg is a T-shaped cylinder sleeved in the upper section of each supporting leg. The upper section of each supporting leg is connected with the lower surface of the launch base. The trust reverser is arranged outside the lower section of each supporting leg. Each supporting foot is connected with the lower section of each supporting leg through a spherical hinge. The trust reversers are four small solid rocket engines and are respectively arranged outside the lower sections of the four supporting legs. Each supporting foot is disc-shaped and connected with the lower portion of each supporting leg through the spherical hinge. By the adoption of the trust reversers and the trust generated from the trust reversers, the launch base is pressed against the lunar surface, so that the defect that the launch base is unstable when the lunar lander upgrader is ignited to take off in bad conditions is overcome, and stability of the lunar lander upgrader when ignited to take off is guaranteed.

The invention discloses a sealant coating system adopting a two-component distribution system, which comprises a two-component distribution system, a first material delivery system, a second material delivery system, a first voltage stabilizer connected with the first material delivery system through a delivery pipe, and a second voltage stabilizer connected with the second material delivery system through a delivery pipe, wherein the first voltage stabilizer is connected with the input end of a first reversing device on the two-component distribution system through the delivery pipe, the second voltage stabilizer is connected with the input end of a second reversing device on the two-component distribution system through the delivery pipe, the output end of the first reversing device is communicated with a sealant coating device through a pipe, and the output end of the second reversing device is communicated with the sealant coating device through a pipe. When the sealant coating system is used, the sealant coating system can not only fully ensure that the two kinds of sealants are completely blended and completely mixed, but also overcome the problem of poor stability in the prior art by use of the voltage stabilizer systems, and can increase the sealant coating capacity to make the whole sealant coating process more perfect.

The invention belongs to the field of light-emitting diode (LED) driving circuits, and discloses a step-down LED driving circuit which comprises a power supply, a filter unit, a constant current unit and an LED, wherein the filter unit is electrically connected between the power supply and the constant current unit, and the constant current unit supplies constant current to the LED. According to the circuit, the design is simple and reliable, the current of an LED lamp group can be designed only by changing the value of voltage sampling resistance R2, and the circuit is simple, convenient, stable and reliable.

The invention discloses a vibrating-type anti-blocking printer spray head assembly which comprises a spray head, a feed venturi tube, a heater and a threaded mechanism, and further comprises a vibrator, wherein a feed opening in the spray head is communicated with a discharge opening in the feed venturi tube; the heater is arranged outside the spray head and in tight contact with the heated area in the spray head; the spray head, the feed venturi tube and the heater are all connected fixedly through the threaded mechanism; an anti-leakage step is arranged the joint of the spray head and the feed venturi tube; the threaded mechanism used for fixedly connecting the spray head with the feed venturi tube is arranged in the inner wall of a cavity at the upper part of the spray head; a reverse threaded mechanism is correspondingly arranged on the outer wall of the feed venturi tube; a thread in the reverse threaded mechanism extends out of the feed opening in the spray head; the vibrator is arranged on the outer wall of the feed venturi tube, and drives a wire material to be separated from the feed venturi tube wall by triggering resonance of the feed venturi tube wall. The vibrating-type anti-blocking printer spray head assembly is high in anti-leakage and anti-blocking properties, solid and durable.

The invention provides an oral liquid preparation of pidotimod, which can promote immunoreaction of a human body, effectively reduces times and degree of treating acute attack of bacteria or virus induced infection, shortens the course of the disease, can serve as an auxiliary medicine of antibiotic during acute infection and belongs to the field of medicines. The oral liquid preparation comprises the pidotimod, a chemical stabilizer, a pH regulator, a flavoring agent and the like, wherein trihytdroxy methyl-aminomethane serves as the pH regulator; and stability of the solution can be effectively improved through quantitative proportion and synergistic effect of each ingredient. The oral liquid preparation has stable quality, is convenient to store for a long time and is particularly suitable for old people or children to take.

The invention relates to a medium-deep layer geothermal energy and solar energy coupled zero-emission heat supply system. The technical problem that in the prior art, design is not reasonable enough is solved. The system comprises a power generation unit, an energy storage unit and an energy consumption unit, the power generation unit is provided with a middle-deep layer buried pipe heat exchange device, a solar photo-thermal heat collection device and a photovoltaic power generation system, the energy storage unit is provided with an electric heat storage boiler, the middle-deep layer buried pipe heat exchange device is connected with the electric heat storage boiler and / or the energy consumption unit through a middle-deep layer geothermal heat pump, the solar photo-thermal heat collection device is connected with the electric heat storage boiler and / or the energy consumption unit, the photovoltaic power generation system is connected with electricity storage equipment, and the electricity storage equipment is connected with the electric heat storage boiler, the middle-deep layer geothermal heat pump and the energy consumption unit. The system has the advantages that a composite efficient heat supply and heat storage system is achieved, and zero emission of the whole set of northern centralized heat supply system is achieved through ultralow-energy-consumption centralized heat supply and obtaining of clean electric power capable of being generated at the same time.

In the invention which belongs to the technical field of recombinant fusion proteins, silkworm alcohol dehydrogenases as exogenous proteins are displayed on surfaces of bacillus subtilis. Capsid protein genes cotC of spores of the bacillus subtilis, serving as molecular vectors, are recombined with silkworm alcohol dehydrogenase genes Bmadh to produce integrated recombinant plasmids which express the silkworm alcohol dehydrogenases BmADH in a fused manner so as to convert the bacillus subtilis; and exogenous genes are integrated in amylase genes amyE at special positions on a chromosome through homologous recombination, and the amylase genes are damaged, so that recombinant strains are free of the activities of the amylase genes; and therefore, recombinant bacillus subtilis strains containing fusion expressions CotC-BmaDH are successfully screened. Spores with fused proteins of silkworm alcohol dehydrogenases displayed on the surfaces are obtained through the inducible expression of the recombinant strains. In the invention, original alcohol dehydrogenases with instable temperature and pH become the fused proteins of the alcohol dehydrogenases with relatively stable activities under different environmental environments, and produced recombinant spores can be used for the direct oral administration of animals.

The present invention belongs to the field of chemical drug preparations and particularly relates to sotalol hydrochloride powder injection for injection and a preparation method thereof. The sotalol hydrochloride powder injection comprises sotalol hydrochloride, chitosan nanoparticles and a PH (power of hydrogen) adjusting agent, wherein the chitosan nanoparticles adopted can significantly shorten the redissolving time of the sotalol hydrochloride, and improve the dissolution rate of the sotalol hydrochloride in injection. The sotalol hydrochloride provided by the invention has the advantages of good redissolving effect, more stable quality, high safety, high reliability, good convenience in transportation, and good application to industrial production, and the like.

The invention discloses a natural gas hydrate density measuring device, which comprises a hydrate reaction kettle system, a constant pressure system, a gas source system and a low-temperature constant-temperature bath, wherein the hydrate reaction kettle system is used for synthesizing the natural gas hydrate and measuring the volume of a sample; the constant-pressure system is communicated with a hydrate reaction kettle through a first pressure resistant pipeline, and is used for regulating the gas pressure in the hydrate reaction kettle; the gas source system is connected with a first pressure resistant pipeline arranged between the hydrate reaction kettle system and the constant-pressure system through a second pressure resistant pipeline, and is used for performing vacuum pumping or providing reaction gas for the hydrate reaction kettle system and the constant-pressure system; the low-temperature constant-temperature bath comprises a low-temperature constant-temperature system; a positioning support frame is arranged in the low-temperature constant-temperature system, and the low-temperature constant-temperature system is provided with a sealed space. The hydrate reaction kettle and the constant-pressure system are fixedly arranged on the positioning support frame, and are integrally positioned in the low-temperature constant-temperature bath. The device provided by the invention belongs to a solid density measuring device for high-pressure and low-temperature in-situ measurement of solid of gas-liquid reaction products of natural gas hydrate and the like; the adjustable pressure and temperature in the high-pressure and low-temperature state can be realized; the density features of solid substances under different confining pressure conditions can also be tested.

The present invention relates to a compound medicine for external application for curing acne and its preparation method. Its composition contains the following two active components: (wt%) 0.01-2% of tretinoin and 0.25-5% of antimicrobial. Said compound medicine can be made into liniment or anhydrous ointment, and has the following therapeutic functions, dissolving keratotic plug, regulating keratosis, resisting microbe, relieving inflammation and reducing secondary factor of sebaceous secretion, so that it can obtain obvious therapeutic effect.

The invention discloses a slipping luffing mechanism for a crossbeam of a horizontal directional drilling machine. The slipping luffing mechanism comprises a crossbeam, wherein one end of the crossbeam is arranged on a chassis of the horizontal directional drilling machine through a fixing hole and a bolt; a lifting oil cylinder is connected with the crossbeam through a hinge; a guide rail is arranged on the crossbeam; a slipping hinged seat is arranged on the guide rail in a sliding manner and is respectively with a piston rod of the lifting oil cylinder and one end of a lifting connecting rod; the other end of the lifting connecting rod is connected with one end of a connecting rod hinged seat; the other end of the connecting rod hinged seat is connected with one end of a crossbeam connecting rod; the other end of the crossbeam connecting rod is arranged on the crossbeam through a hinge connecting seat; the middle of the crossbeam connecting rod is connected with the piston rod of the crossbeam oil cylinder; and the crossbeam oil cylinder is arranged on the chassis of the horizontal directional drilling machine through a connecting seat. The slipping luffing mechanism has the advantages of simple structure, low manufacturing cost, reliable and stable operation and strong practicability, and not only overcomes the defect of instability of the conventional luffing mechanism, but also can entirely lift the crossbeam to enlarge an climbing angle during transportation.

The invention discloses an electric synthesizing method of polyaniline. The electric synthesizing method is characterized by comprising the following steps of S1. ultrasonically washing conducting glass for 15min respectively in distilled water, absolute ethyl alcohol, acetone, absolute ethyl alcohol and distilled water so as to remove the surface impurities, and naturally drying the conducting glass; S2. placing the conducting glass into an electrolytic tank, scanning the conducting glass at a constant scanning speed by utilizing a cycling voltammetry, and adopting the mixed solution of 0.5mol / L HCL and 0.5mol / L aniline as electrolyte; S3, rapidly transferring a working electrode aggregating the polyaniline into the distilled water, and washing the working electrode with the distilled water to remove the residual acid radical ions and aniline monomers; and S4. standing the polyaniline working electrode under the condition of 10 DEG C for 24h to be dried. The electric synthesizing method has the advantages that the synthesized polyaniline film is stable in structure, and the good electric performance can be maintained, and the instability defect of the electrode caused by the adhesion can be overcome.

The invention relates to a constructing method of a standard sample in Alexandrium catenella (A.catenella) fluorescence quantitative polymerase chain reaction. A recombinant plasmid is constructed by extracting DNA of A.catenella ACDH01, amplifying 18S rDNA of A.catenella ACDH01 to a 28S rDNA gene segment through polymerase chain reaction, and connecting an amplified product with a T carrier; the confirmed recombinant plasmid is diluted into a polymerase chain reaction standard sample in a gradient way; real-time polymerase chain reaction is carried out by using 5.8S-b5' and 5.8S-b3' as primers and a recombinant plasmid standard sample as a template; and a standard curve is prepared according to a clinical circulating number in the reaction and the log value of the gradient concentration of the recombinant plasmid standard sample. The recombinant plasmid real-time polymerase chain reaction standard sample with 18S rDNA-28S rDNA gene segments of the A.catenella ACDH01 is established; and the real-time polymerase chain reaction detection is accurately, efficiently and rapidly carried out on A.catenella ACDH01 to be tested by adopting a pair of universal primers.

An indicator capable of rapidly determining steam boiler feedwater hardness is characterized by being prepared by the following components in parts by weight: 52-57 parts of sodium chloride, 15-20 parts of sodium carbonate, 26-31 parts of sodium bicarbonate, 0.13-0.15 parts of disodium ethylene diaminetetraacetate and 0.18-0.20 part of eriochrome black T. The components of the indicator do not contain crystal water, therefore the indicator is stable in property and not prone to deliquescence and overcomes the defect that the disodium hydrogen phosphate and sodium dihydrogen phosphate contain lots of crystal water, thus being prone to deliquescence. The invention adopts the eriochrome black T as the color indicator, thus overcoming the defect that the color indicator is unstable when the ratios of acid chrome blue K and naphthol green B misfits each other when the KB indicator is adopted. The indicator is simple in production process, low in raw material cost and rapid and convenient in detection.

The invention discloses palm print acquisition equipment, a palm print acquisition method and an image acquisition device. The equipment comprises an image acquisition device and an image processing device, wherein the image acquisition device comprises a lens group, a light splitting module, a common camera and a depth camera, after light captured by the lens group is split by the light splittingmodule, one part is acquired by the common camera to obtain a two-dimensional RGB image, and the other part is simultaneously acquired by the depth camera to obtain a depth map of a palm; the image processing device uses the two-dimensional RGB image and the depth map to calculate a 3D point cloud describing the spatial attitude of the palm, wherein the spatial attitude comprises two-dimensionalcoordinates of RGB image pixels and third-dimensional coordinates of the RGB image pixels determined by the depth map; the spatial attitude of the 3D point cloud is corrected to a preset positive direction through spatial transformation, and third-dimensional direction information of the corrected 3D point cloud is removed to obtain a corrected two-dimensional palm image; and palm print ROI extraction is extracted on the corrected two-dimensional palm image. According to the invention, the stability of palm print ROI extraction can be significantly improved.

The invention discloses alprostadil lipid nanosphere gel and a preparation method thereof, and belongs to the technical field of medicines. The alprostadil lipid nanosphere gel is prepared from the following raw materials in part by weight: 0.001 to 0.1 part of alprostadil, 20 to 50 parts of oil for injection, 10 to 20 parts of emulsifier, 15 to 25 parts of aid emulsifier, 10 to 15 parts of glycerol, 390 to 445 parts of water and 500 parts of excipient gel substrate. In the alprostadil lipid nanosphere gel, the grain diameter is less than 100 nanometers, and bacteria can be removed in a mode of aseptic filtration, so the defect that the alprostadil is unstable is overcome, and the stability of products is enhanced. Simultaneously, lipid microspheres have smaller grain diameters of less than 100 nanometers, so the alprostadil lipid nanosphere gel is favorable for distributing the alprostadil in vivo and gathering the alprostadil to target organs easily, reduces the inactivation of pulmonary circulation and clearance in blood, is favorable for long-term circulation, increases the transdermal absorption of the medicines and improves the medicinal effect.

The invention discloses a greenhouse type multi-compressor heat pump drying device which is composed of a heat pump cycle and a solar heating drying cycle. The heat pump cycle comprises at least two compressors, at least two condensers, two evaporators and two throttle valves, and the solar heating drying cycle comprises a greenhouse drying box, an adjusting air door, a draught fan and the like. Combined drying is achieved through the heat pump cycle and the solar heating drying cycle. The greenhouse drying box is made of sunlight transmissive materials such as glass, can fully absorb solar radiation heat to dry materials, forms a solar heating circulation path under driving of the draught fan and the adjusting action of the adjusting air door, and is used for increasing the air temperature for product drying. According to the greenhouse type multi-compressor heat pump drying device, temperature and humidity are adjusted by means of the adjusting air door, compressor frequency conversion and the like, air adjustment is more flexible, control is more accurate, the adjustment range is wider, and the drying process is sanitary, efficient and energy-saving.

The invention discloses an extraction and crystallization process of a 5-oxomilbemycins fermentation liquor. The extraction and crystallization process comprises pretreatment of the fermentation liquor: mycelium immersion, extraction, filtration and concentration; n-heptane extraction, concentration, stirring and crystallization; n-heptane leaching drying; and the like. A 5-oxomilbemycins crystalproduced by the process disclosed by the invention has the purity up to 99 percent which is more than the purity of a 5-oxomilbemycins coarse product by 25 to 35 percent; furthermore, the process is simple, high in yield and high in stability; no silicagel column chromatographic purification process is involved in a production process, so that the cost is reduced, and the burden for environmentalprotection is greatly reduced.

The invention discloses a valve-type anti-blocking printer nozzle component which comprises a nozzle, a feed throat pipe, a heater and a threaded mechanism, and further comprises a silk material valve, wherein the feed opening of the nozzle is communicated with the discharge opening of the feed throat pipe; the heater is arranged outside the nozzle, and is in tight contact with the heated area of the nozzle; the nozzle, the feed throat pipe and the heater are all fixedly connected with one another through the threaded mechanism; a leak-proof step is formed at the transitional part between the nozzle and the feed throat pipe; the threaded mechanism, through which the nozzle and the feed throat pipe are fixedly connected with each other, is arranged on the inner wall of the upper part cavity of the nozzle; a reversed threaded mechanism is correspondingly arranged on the outer wall of the feed throat pipe; the thread of the threaded mechanism extends out of the feed opening of the nozzle; the silk material valve is arranged near the joint of the feed throat pipe and the nozzle; when the heater stops heating, the feed throat pipe is closed by the silk material valve. The valve-type anti-blocking printer nozzle component is high in leak prevention and anti-blocking performance, sturdy and durable.

The invention discloses a frequency-conversion phase-modulating signal instrument, comprising a signal input interface, two signal output interfaces, a frequency-conversion circuit module and a phase-modulating circuit module and the like, wherein one signal output interface is directly connected with the signal input interface, and the other signal output interface is connected with the signal input interface after being connected with the phase-modulating circuit module and the frequency-conversion circuit module respectively. The frequency-conversion phase-modulating signal instrument is characterized in that the frequency ratio and the phase difference of two output signals of the frequency-conversion phase-modulating signal instrument can be adjusted, stable lissajous figures at different frequency ratios and different phase differences can be observed from an oscilloscope. The frequency-conversion phase-modulating signal instrument has the advantages that the defect of unstable lissajous figures in the original experiment is overcome, the effect of the experiment is improved, and the more practical and convenient effects are achieved.

The invention relates to high-chlorine-content oil hydrogenation dechloridation catalyst and a preparation method thereof. The method comprises the steps of first preparing a molecule sieve-MgAl2O4-Al2O3 composite carrier containing an assistant P, impregnating the carrier with the water-soluble compound of an active component Ni or Co and Mo, W and the assistant Ce, drying and roasting the carrier, and preparing the hydrogenation dechloridation catalyst. The content of each component of the catalyst is as follows in percentage by weight: 2 to 5 percent of NiO or CoO, 5 to 10 percent of MoO3, 4 to 10 percent of WO3, 2 to 4 percent of assistant P2O5, 1 to 2 percent of CeO2, and the balance of composite carrier. The catalyst is good in activity and stability, the organic chloride in the oil can be removed under a mild condition, and the removing rate is more than 99 percent.