44results about How to "Good hydrogenation effect" patented technology

The invention relates to a selective hydrogenation method of high unsaturated hydrocarbons in C4 fractions, which is characterized in that salvage stores which are rich in acetylene hydrocarbon and prepared by extracting butadiene are used as the material, and a fixed bed reactor is adopted to obtain 1, 3-budiene by selective hydrogenation under the existence of a catalyst. The adopted process conditions are as follows: the reaction temperature is between 30 DEG C and 90 DEG C, the reaction pressure is between 1.0 MPa and 4.0 MPa and the liquid space velocity is 7 to 20h<-1>. The catalyst is preferably a palladium system catalyst with alumina as a carrier, the specific surface is 50 to 150m<2>/g and the specific pore volume is 0.25 to 1.0ml/g. The method has remarkable good effects on reducing waste of resources and improving economic benefits by effectively utilizing the salvage stores rich in acetylene hydrocarbon and prepared by extracting butadiene.

The invention provides a selectivity hydrogenation method for diolefin of full-fraction pyrolysis gasoline, which comprises reduction and passivation of catalyst and application of technological conditions. The catalyst is nickel series hydrogenation catalyst which is used after being reduced or being subjected to reduction and passivation. The selectivity hydrogenation method is characterized in that the hydrogenation technological conditions are as follows: the volume space velocity of a liquid is less than or equal to 4h<-1>, the inlet temperature of a reactor is between 40 and 130 DEG C, the reaction pressure is more than or equal to 2 MPa, and the hydrogen/oil ratio is between 100 and 500 (v/v); the nickel series catalyst takes alumina as a carrier, is prepared by the immersion method, and contains 14 to 20 percent of nickel oxide, 1 to 8 percent of lanthanum oxide and/or cerium oxide, 1 to 8 percent of 4B oxide auxiliary agent, 2 to 8 percent of silicon dioxide and 1 to 8 percent of alkaline earth oxide as calculated by 100 weight percent of the catalyst; and the specific surface of the catalyst is between 60 and 150 square meters per gram, and the pore volume of the catalyst is between 0.4 and 0.6 milliliter per gram. The invention also provides a method for performing reduction and passivation on the catalyst on a hydrogenation unit. Under the conditions of the application method and the technological conditions, the nickel catalyst has good hydrogenation performance, and particularly has strong impurity and colloid resistance and good hydrogenation stability.

The invention relates to an industrial manufacture method for hydrogenated petroleum resin, which comprises the following steps of: generating hydrogenation reaction on petroleum resin which is obtained by polymerizing cracking C5 and C9 fractions under the proper condition of the existence of hydrogenation catalyst and solvents by adopting the processes of two-section hydrogenation and combination alkaline cleaning neutralization; hydrogenating the unsaturated component in the petroleum resin to reduce double-bond content; hydrogenating a non-ferrous perssad to fade; hydrogenating to remove chlorine retained in the polymerization process; and carrying out alkaline cleaning, water cleaning, stabilizer injection and solvent removal to obtain light or colourless hydrogenated petroleum resin. The method further simplifies the process through the organic combination of unit operation, and the industrial manufacture method for the hydrogenated petroleum resin, which has the advantages of wide adaptability on hydrogenated raw materials, less corrosion on system equipment, high product quality and high production capability is formed.

The invention relates to a method for separating and producing 1,3,5-trimethylbenzene through hydrocracking heavy aromatic hydrocarbons to mainly solve technical problems of low added value of the heavy aromatic hydrocarbons, and complex flow, low product purity, low yield and the like in separation of 1,3,5-trimethylbenzene monomers from the heavy aromatic hydrocarbons. According to the method, hydrogen type binder-free ten-membered ring zeolite loading 0.005-0.5% by mass of Pt or Pd is adopted as a catalyst, hydrogen and the heavy aromatic hydrocarbons which are raw materials undergo hydrocracking treatment, and 1,2,4-trimethylbenzene and heavy aromatic hydrocarbons having boiling points greater than the boiling point of the 1,2,4-trimethylbenzene in products are returned to a reactor, so BTX aromatic hydrocarbon yield increase and 1,3,5-trimethylbenzene separation production are realized. The method well solves the problems, and can be used for the industrial production for yield increases of the BTX (benzene, toluene and xylol) aromatic hydrocarbon and the 1,3,5-trimethylbenzene.

The invention relates to a method for the increase production of BTX aromatic hydrocarbons and trimethylbenzene through hydrocracking heavy aromatic hydrocarbons to mainly solve technical problems of low heavy aromatic hydrocarbon added value and high cost for separating and producing trimethylbenzene monomers in the heavy aromatic hydrocarbons containing methylethylbenzene, propylbenzene and butylbenzene. The method comprises a step that the heavy aromatic hydrocarbons are subjected to a hydrocracking reaction through adopting Pt/Pd-loaded hydrogen type binder-free ten-membered ring zeolite as a catalyst under reaction conditions comprising that the reaction temperature is 320-450DEG C, the reaction pressure is 2.0-4.0Mpa, the hydrocarbons raw material weight hourly space velocity is 1.0-4.0h<-1> and the hydrogen/hydrocarbon raw material ratio by mole is 3-10:1. The method well solves the problems through above technical scheme, and can be applied to the industrial production of the BTX aromatic hydrocarbons and the trimethylbenzene.

The present invention belongs to the field of the preparation of palladium catalyst, and is especially supported palladium catalyst and its preparation process and application. The supported palladium catalyst is noble metal palladium supported onto nanometer alumina fiber carrier and has the supported amount of palladium as the active component in 0.1-1 wt%. The nanometer alumina fiber carrier is gamma-alumina fiber, and the noble metal palladium is supported onto the nanometer alumina fiber carrier through equal volume soaking process. The high dispersive supported palladium catalyst is used in hydrogenating anthraquinone to prepare hydrogen peroxide solution, has high hydrogenating effect and mild reaction condition, and suitable for industrial production.

The invention provides an unsaturated polymer hydrogenation catalyst and a preparation method thereof. The unsaturated polymer hydrogenation catalyst is formed by reacting metal organic compounds of IA, IIA and IIIA groups with a nickel/cobalt metal inorganic salt, wherein the metal mol ratio of organic metal to inorganic metal is (1-10): 1. The hydrogenation effect of the catalyst on a homopolymer of conjugated diene or a copolymer of the conjugated diene and vinyl arene is obvious, the hydrogenation selectivity of the catalyst is high and the catalyst is not easily remained in the polymer after a hydrogenation reaction and can be washed by water, so that the catalyst is good for improving the purity and the quality of the polymer.

A preparing method of a mercaptan etherification catalyst is disclosed. The method includes: (1) dipping an Al2O3 carrier with a potassium salt solution, drying, and calcinating at 300-600 DEG C to obtain a K2O/Al2O3 carrier; and (2) adding a molybdenum-containing compound, a nickel-containing compound and a composite auxiliary agent into deionized water to prepare a dipping solution; and (3) dipping the carrier obtained in the step (1), drying and calcinating at 200-400 DEG C to obtain a NiO-MoO3-K2O/Al2O3 catalyst. The Al2O3 carrier is modified by the K2O so as to enhance carbon deposit resistance and stability of the catalyst. The composite auxiliary agent, the molybdenum-containing compound and the nickel-containing compound form a complex, thus weakening interaction of NiO, MoO3 and the Al2O3 carrier, promoting dispersion of active components in the Al2O3 carrier, and enhancing activity of the catalyst. The catalyst is high in activity of removing mercaptan in gasoline, and has good hydrogenation effects for dienes.

The invention relates to a low-temperature polycrystalline silicon thin film transistor and a preparation method thereof. The method comprises the following steps: providing a substrate; depositing a buffering layer and a non-crystalline silicon layer on the substrate in sequence, and performing laser radiation to change the non-crystalline silicon layer into a polycrystalline silicon layer which is an active layer; depositing a first grid insulating layer, a second grid insulating layer and a first metal layer on the buffering layer and the active layer in sequence, performing high-temperature activation, and photoetching and etching the first metal layer to form a grid; depositing dielectric layers on the grid insulating layers and the grid; depositing first contact holes and second contact holes in the dielectric layers, the first grid insulating layer and the second grid insulating layer; and respectively depositing source electrodes and drain electrodes on the first contact holes and the second contact holes. The thin film transistor prepared by the method can effectively overcome the structural defects of polycrystalline silicon, and the performance of the thin film transistor can be improved.

The present invention relates to a Fe-based hydrogenation catalyst having Fe as a primary active metal component, and zinc and potassium as a first co-active metal component. The molar ratio of the primary active metal component to the first co-active metal component is 0.5-200:1. The Fe-based hydrogenation catalyst in present invention overcomes the problem of limiting to the active metal components as used over decades for the conventional hydrogenation catalyst, and thus has long-term values for industrial application.

The invention provides a hydroprocessing method of catalytic cracking heavy cycle oil. The hydroprocessing method comprises the following steps of: sending hydrogen into the catalytic cracking heavy cycle oil through holes of which the average hole size is in nanometer sizes so as to obtain hydrogen-containing heavy cycle oil; sending the obtained hydrogen-containing heavy cycle oil into a tubular reactor, and enabling the hydrogen-containing heavy cycle oil to be in contact with a hydrogenation catalyst filled in the tubular reactor under liquid phase hydrogenation processing conditions. The invention further provides a processing method for producing raw materials of needle coke. The invention further provides a method for producing the needle coke. According to the hydroprocessing method disclosed by the invention, even if a diluting agent and/or cycle oil are/is not used, the hydrogen can also be highly dispersed and dissolved in the catalytic cracking heavy cycle oil, enough hydrogen sources are provided for hydroprocessing, and the efficient processing quantity for a hydroprocessing device is increased. In addition, the hydroprocessing method disclosed by the invention can effectively remove metal, sulfur and asphalt substances in the catalytic cracking heavy cycle oil, so that the raw materials conforming to the needle coke for producing ultra-high power electrodes are obtained.

The invention discloses a mild, simple and convenient preparation method. The preparation method comprises the steps of mixing a reactant solution, silicon hydrogen and a catalyst, namely tetraethylammonium fluoride, putting the mixture into a sealed reaction container, and reacting at 25-60 DEG C for 0.5-2 hours, so as to obtain aromatic alcohol, wherein the use amount of silicon hydrogen is 2-4times of that of aromatic aldehyde, the concentration of aromatic aldehyde in the organic solvent is 2wt%-4wt%, and the content of the catalyst, namely tetraethylammonium fluoride relative to aromaticaldehyde is 5mol%-10mol%. According to the preparation method, the deficiencies of a traditional catalytic system that the dangerousness is high, the environment is polluted, the process is complex,and the content of byproducts is high can be effectively overcome.

The invention belongs to the technical field of catalysis, and particularly relates to a Ni@MoC/NMC catalyst for reducing a biological plasticizer neopentyl glycol dibenzoate and a preparation method.The Ni@MoC/NMC catalyst disclosed by the invention is synthesized by adopting a one-step method. An active center is embedded into a carrier by mainly utilizing a template under the action of a carbon-containing ligand. The catalyst prepared by the method is low in cost, high in activity and good in stability, and the Ni@MoC/NMC catalyst is large in specific surface area, high in active componentdispersity and good in reaction activity and selectivity.

The present invention relates to a nickel-based catalyst. The catalyst is prepared by loading metallic nickel active components on a composite carrier which consists of an aluminum oxide-titanium oxide complex and ZSM-5, wherein in the catalyst, a weight ratio of aluminum oxide and titanium oxide is 4:1; a content of nickel oxide is 12%-20% by weight; the aluminum oxide-titanium oxide takes 30%-70% of the entire composite carrier by weight, the ZSM-5 takes 30%-70% of the entire composite carrier by weight; the surface area of the catalyst is 90-260 m 2/g; and the pore volume is 0.5-1.5 ml/g. The catalyst has characteristics of good low-temperature hydrogenation activity, strong anti-impurity ability and sol ability, a long regeneration cycle, and good stability. Applying the catalyst to a process in which diene is converted to monoolefins through selective hydrogenation can maintain a good hydrogenation effect.

The invention discloses a methyl isobutyl ketone high-space-velocity hydrogenation catalyst, a preparation method and applications thereof. The catalyst is prepared from the following components in parts by weight: 12-26 parts of cobalt and 70-88 parts of a zirconium-modified alumina carrier based on 100 parts of the total weight of the catalyst, wherein the zirconium-modified aluminum oxide is analuminum oxide carrier formed by molding pseudo-boehmite powder, the pseudo-boehmite powder is prepared by using an aluminum sulfate solution containing a soluble zirconium salt as a raw material through an aluminum sulfate-sodium metaaluminate method, the zirconium content in the aluminum oxide carrier is 1-8 wt%, and the sulfate ion content is less than 0.4 wt%. The catalyst disclosed by the invention is good in stability, and has high activity and high selectivity at a low temperature.