70results about How to "Increased hydrogenation conversion" patented technology

The invention discloses an oil solubility compound-type suspended bed hydrocracking catalyst, wherein the catalyst is prepared by the following steps: 1) enabling compounds of metal elements in the VIB family, the VIIB family or the VIII family in a periodic table of elements as metal sources with alkali metal sulfide or alkali metal hydrosulfide according to the mole ratio of (0.5 to 1)-(2 to 1), thereby obtaining a metal element compound at a reduction state; 2) adding the metal element compound at the reduction state and amine substances into a reaction medium according to the mole ratio of (1:0.6)-(1 to 2), and meanwhile dropwise adding carbon disulfide with the corresponding quantity into the reaction medium according to the mole ratio of (1 to 1)-(2 to1) with the metal element compound at the reduction state, warming to react at the reaction temperature of 30-110 DEG C for 2-10 hours; 3) filtering and washing the product obtained by the step 2) so as to obtain the oil solubility compound-type suspended bed hydrocracking catalyst. The catalyst prepared by the invention can inhibit the coke yield, and improve the light oil yield.

The invention relates to a catalyst, in particular to the catalyst for hydrogenation of carbon dioxide to generate methanol and a preparation method thereof. A carbon nanotube-based material is adopted as an accelerating agent. When being used for the catalytic hydrogenation of the carbon dioxide to generate the methanol, the catalyst can effectively increase the hydrogenation converting rate of the carbon dioxide and the one-path yield rate of the methanol. The catalyst comprises main metal components and the accelerating agent of the carbon nanotube-based material. The main metal components include Cu, Zn and Or. The accelerating agent of the carbon nanotube-based material means CNT or y% Co/CNT, and the chemical formula is CuiZnjZrk-x% (CNT or y% Co/CNT). The mass percent of each component is as follows: Zn: 5 to 20%; Zr: 25 to 50%; the accelerating agent of the carbon nanotube-based material: 1 to 18%; and the rest is Cu. The catalyst is prepared through coprecipitation. A multi-wall carbon nanotube modified by metal cobalt is prepared by utilizing liquid-phase microwaves of polyalcohol to assist in chemical reduction and deposition.

The invention provides a method for preparing 4-amino diphenylamine by catalytic hydrogenation. The method adopts two sections of hydrogenation reaction processes, and comprises the following steps: performing the condensation reaction of condensation solution formed by the condensation reaction of nitrobenzene and aniline which serve as raw materials under an alkaline condition by using using a noble metal hydrogenation catalyst and a nickel catalyst sequentially so as to make the conversion rate of 4-nitroso diphenylamine, 4-nitro diphenylamine and azoxybenzene achieve 100 percent; and separating the noble metal hydrogenation catalyst and the nickel catalyst by using a two-stage membrane separation component system to avoid the loss of small particles of catalyst. At the same time, the method has high degree of automation and can easily realize the continuous hydrogenation process.

The present invention provides a process for hydrogenation of a conjugated diene polymer comprising hydrogenating said polymer in the presence of hydrogen and a hydrogenation catalyst composition, wherein the catalyst composition comprising a titanium compound (A), a silyl hydride (B) selected from the group having a Si—H group and consisting of a monomeric silyl hydride, a polymeric silyl hydride, and a cyclic silyl hydride; and a compound (C), and conducting the hydrogenation in a middle to larger sized reactor having a capacity of 25 liters, with a temperature of 50° C. to 150° C., and a hydrogen pressure of 1 kg/cm² to 20 kg/cm².

The invention provides an alkadiene selective hydrogenation catalyst and a preparation method thereof. The carrier of the catalyst adopts carboxyl-functionalized step hole FZIF-8; active components adopts palladium; the active component palladium accounts for 0.1 to 10 percent on the basis of the total weight of the carrier of the catalyst. The invention further provides the preparation method of the alkadiene selective hydrogenation catalyst. A step hole structure is formed in the carrier of the alkadiene selective hydrogenation catalyst, so that carboxyl groups have accessibility, and the active components and the carboxyl groups can interact mutually; the carboxyl groups are contained in the carrier of the catalyst, can anchor the active components, realize high dispersion of the active components, meanwhile prevent agglomeration and drain of the active components during the process, and ensure that the catalyst is high in activity. The catalyst can be applied to the hydrogenation upgrading of FCC petrol, removal of alkadiene in the petrol, and is mild in reaction condition, low in reaction temperature and pressure, and good in selective hydrogenation effect of products.

The invention provides a two-stage slurry bed hydrogenation process of medium and low temperature coal tar, and the a two-stage slurry bed hydrogenation process comprises the following steps: (1) performing purification on the medium and low temperature coal tar; (2) performing decompression or atmospheric distillation on the medium and low temperature coal tar purified by the step (1) for cutting into light oil fractions and heavy oil fractions, wherein the cutting point temperature range is 320 to 380 DEG; (3) mixing the heavy oil fractions higher than the cutting point of the step (2) with a hydrocracking catalyst and H2, mixing evenly, and in turn getting into a first stage slurry bed and a second slurry bed for two-stage hydrocracking reaction, processing the prepared hydrocracking products by fractionation, performing fractional distillation on the hydrocracking products by the cutting point temperature range in the step (2) to distil off fractions lower than the cutting point; discharging 3-8% fractions higher than 540 DEG C out, and recycling the rest fractions back to a first stage slurry bed reactor. A liquid fuel prepared by the process has the advantages of low hydrogen consumption and high product yield.

The invention provides a method for preparing high-strength carbon nano tube supported platinum catalyst applicable to industrial application, comprising the following steps: preprocessing, namely heating and refluxing a protogenic carbon nano tube in mixed acid of 98wt% concentrated sulfuric acid and 60-63wt% concentrated nitric acid at a volume ratio of 3:1 and at a temperature of 100-130 DEG C, then filtering, washing and drying; impregnating, namely mixing the preprocessed carbon nano tube and a chloroplatinic acid solution, standing for 24 hours, adding absolute ethyl alcohol the volume of which is no more than 50% of the total volume, evaporating a solvent by utilizing a rotary evaporator, and smashing to obtain particles with the granularity of 80-100 meshes; and reducing, namely processing in a hydrogen flow at the temperature of 350 DEG C for 2 hours, cooling to room temperature, and passivating in 20% nitrogen-air for 1 hour. The obtained catalyst has good catalytic activity on nitrobenzene hydrogenation reaction, and the crushing strength reaches 20N.mm<-1>.

The invention relates to a diacetylene hydrogenation catalyst and mainly solves the technical problems of high catalyst cost and poor stability in the prior art. In the invention, by means of a fixed bed reactor, a material containing the diacetylene and hydrogen are employed as raw materials and are contacted with a catalyst bed layer through the reactor to convert the diacetylene into monoalkene or alkane. The catalyst used in the reactor comprises the following components, on the basis of the weight part of the catalyst: (a) 10-20 parts of metal nickel or an oxide thereof, (b) 0.1-10 parts of at least one element of cerium or lanthanum or an oxide thereof; (c) 0.1-30 parts of zinc or an oxide thereof, (d) 0-2 parts of alkali metal or alkali earth metal, and (e) 38-90 parts of aluminum oxide. The technical scheme solves the technical problem well. The diacetylene hydrogenation catalyst is used in industrial production of high-order acetylene hydrogenation in a device of partially oxidizing natural gas to produce acetylene.

The present invention provides a catalyst composition for hydrogenation comprising: (1) a titanium compound (A) represented by the following formula (a):

(2) a silyl hydride (B); and (3) a compound (C) represented by the following formula (e):

The catalyst composition for hydrogenation can maintain activity longer and improve hydrogenation conversion of the conjugated diene polymers, particularly of the trans structure. The conjugated diene polymers produced according to the present invention can further perform good thermal stability and odorless.

The invention relates to a method for continuously producing pinane by pinene and a device therefor. The method comprises the following steps: (1) placing catalyst into a fixed bed reactor, replacing air with nitrogen, then preheating hydrogen before feeding the hydrogen into a gas and liquor mixer; preheating the pinene by a liquor preheater and then feeding the preheated pinene into the gas and liquor mixer; evenly mixing the preheated pinene with hydrogen in the gas and liquor mixer and then feeding the mixture into the fixed bed reactor to carry out hydrogenation; (2) cooling the hydrogenated material; (3) carrying out gas-liquid separation on the cooled reaction mass to obtain a menthane liquid product, returning the separated hydrogen to the fixed bed reactor. The invention also relates to a device for continuously producing pinane by pinene. The method and the device of the invention facilitate the improvement of the unstable state in the hydrogenation production of the pinane by the pinene, improve production efficiency, promote convenient utilization of the automatic control system in the production process and facilitate the reduction of human operational errors; in addition, the invention features stable quality of the product, safe operation, high efficiency and low energy consumption and convenient expansion of production scale.

The invention relates to an organic molybdenum salt and a preparation method thereof. The organic molybdenum salt is a molybdenum amine complex containing Mo<+6>, an acyl group bound with the molybdenum ion and an amine group combined with a hydrocarbon group in the acyl group, wherein molybdenum accounts for 10%-30% by mass of the organic molybdenum salt. The provided organic molybdenum salt is used as a catalyst precursor of a residual oil hydrogenation process, and has high hydrogenation conversion rate; meanwhile, the compound has excellent antiwear and antifriction properties and good metal corrosion inhibition performance, and can be used as a water-soluble lubricating oil additive. The preparation method of the water-soluble organic molybdenum salt is simple, the synthesis route isnon-toxic and environmentally friendly, and product separation is simple.

The invention provides a catalyst for an alkyne hydrogenation reaction. The catalyst comprises a gold-palladium bimetallic nanomaterial and a ZIF metal organic framework material coated on the surfaceof the gold-palladium bimetallic nanomaterial. The invention also provides a preparation method of the catalyst, and the method comprises the step of performing a reaction on the gold-palladium bimetallic nanomaterial, imidazole compounds and a zinc source in a solvent so as to obtain the catalyst for the alkyne hydrogenation reaction. Through coordination of central zinc metal ions with the imidazole compounds, coating on the surface of the gold-palladium bimetallic nanomaterial is achieved so as to prepare the catalyst with the metal organic framework material-coated bimetallic nanomaterial; and the catalyst is applied to photo-driven alkyne hydrogenation reactions, and exhibits excellent hydrogenation activity and excellent selectivity to olefin products.

The invention provides a selective hydrogenation method for alpha-methyl styrene, which comprises: alpha-methyl styrene-containing raw material circulation pass through nickel-based catalyst and palladium-based catalyst with hydrogen in sequence, after one-step hydrogenation, the alpha-methyl styrene is converted into isobutylbenzene. Optimally, nickel-based catalyst and palladium-based catalyst are contacted directly. According to the hydrogenation method provided by the invention, the reaction material circulation continuously passes through different catalysts, thereby realizing one-step hydrogenation, and simplifying reaction equipment and reaction technology, and saving cost. In addition, according to the invention, the hydrogenation reaction condition is mild, and the catalyst activity is high, and the hydrogenation conversion rate and hydrogenation selectivity are high.

The invention discloses a heavy oil slurry reactor hydrogenation reaction device and an application method. The device comprises a slurry bed circulation flow reactor, a buffer tank connected with the slurry bed circulation flow reactor and a fixed bed hydrogenation reactor communicated with the upper portion of the buffer tank. The slurry bed circulation flow reactor comprises an ascending pipe (4), an enlarging section (1) on the top of the ascending pipe and a descending pipe (8). The enlarging section (1) is communicated with the upper portion of the descending pipe (8). The lower portion of the ascending pipe (4) is communicated with the bottom of the descending pipe (8). A slurry phase separator is arranged inside the enlarging section (1). The slurry phase separator is a sleeve structure with an inner cylinder (3) and an outer cylinder (2). A foam remover (11) is arranged at the upper portion of the slurry phase separator. A gas outlet (10) is arranged on the top of the enlarging section. A material outlet (13) is arranged on the side wall of the enlarging section. A raw material inlet (9) is formed in the bottom of the ascending pipe (4). According to the slurry reactor hydrogenation reaction device and application method, long-term operation of the reactor is convenient, the heavy oil hydrogenation conversion rate is increased, and slurry processing of follow-up equipment is convenient.

The invention discloses a catalyst for preparing synthetic natural gas and a preparation method thereof, and relates to a catalyst. The catalyst is scandium-enhanced coprecipitation type nickle-cobalt-based catalyst, the chemical formula is NiiZrjSck, wherein the subscripts i, j and k in the formula are the molar ratio factor of Ni, Zr and Sc in the catalyst; the catalyst comprises the following components in percent by weight: 48%-62% of Ni, 3%-25% of Sc and the balance of Zr. The preparation method comprises the following steps of: mixing and preparing metered Ni(NO3)2.6H2O, Zr(NO3)4.3H2O and Sc(NO3) into aqueous solution, carrying out coprecipitation reaction with K2CO3 aqueous solution, filtering feed liquid after reaction, cleaning, drying and roasting on filtered cakes, and then obtaining the NiiZrjSck catalyst for methanation of coal or biomass-based synthetic natural gas. The catalyst disclosed by the invention has the advantages that the activity is high and stable, the heat resistance is good, the conversion rate of hydrogenated methanation of CO and CO2 and the per pass yield of a product (methane) can be effectively improved.

The invention provides a two-stage slurry bed hydrogenation process of high temperature coal tar, and belongs to the coal chemical technical field. The two-stage slurry bed hydrogenation process comprises the following steps: (1) performing purification on the high temperature coal tar; (2) performing decompression or atmospheric distillation on the high temperature coal tar purified by the step (1) for cutting into light oil fractions lower than 350DEG C and heavy oil fractions higher than 350 DEG C; (3) mixing the heavy oil fractions higher than 350 DEG C of the step (2) with a hydrocracking catalyst and H2, mixing evenly, and in turn getting into a first stage slurry bed and a second slurry bed for two-stage hydrocracking reaction, and processing the prepared hydrocracking products by fractionation. A liquid fuel prepared by the two-stage slurry bed hydrogenation process of the high temperature coal tar has the advantages of low hydrogen consumption and high product yield.

The invention discloses a heavy oil hydrogenation reactor and a hydrogenation method. The reactor comprises a reactor outer cylinder, an inner cylinder I and an inner cylinder II, the inner cylinder I and the inner cylinder II are arranged in the axial direction of the reactor, the cross sectional area of the inner cylinder I is gradually reduced from top to bottom, and the cross sectional area of the inner cylinder II is gradually increased from top to bottom; an annular space is formed among the inner cylinder I, the inner cylinder II and the reactor outer cylinder body; wherein the inner cylinder I is filled with a hydrogenation catalyst I, the annular space is filled with a hydrogenation catalyst II, and the activity of the hydrogenation catalyst I is higher than that of the hydrogenation catalyst II. The viscosity of the material is reduced through the viscosity reduction assembly arranged in the inner cylinder II, and then the material sequentially passes through the inner cylinder I and the annular space to generate hydrogenation reaction, so that the mass transfer process driving force and reaction rate of heavy oil liquid phase hydrogenation reaction are improved, the contact time of the reaction material and different active catalysts is controlled, and catalyst surface coking is slowed down; the deep cracking reaction of the light oil is reduced, and the liquid yield and the heavy impurity removal conversion rate in the heavy oil liquid phase hydrogenation reaction process are improved.

The invention relates to a layered composite material as well as a preparation method and application thereof, in particular to a Fe-based material for high-selectivity preparation of alpha-olefin. Acatalyst provided by the invention can inhibit secondary hydrogenation reaction of primary olefinand water gas shift reaction WGS, thereby improving olefin selectivity, effectively reducing CO2 generation, regulating and controlling product distribution with high added value, especially improving the yield of alpha olefin, and having significant industrial application value.