57results about How to "High Hydrodesulfurization" patented technology

The invention provides a method for preparing a hydrogenation catalyst with high activation. A disposition method is adopted to carry out step-by-step loading to the active components of the metals of VIB and VIII families; the VIB metal comprises tungsten or molybdenum, while the VIII metal comprises nickel or cobalt; a carrier is alumina. The loading of VIB metal takes a corresponding soluble salt as raw material, an acid solution as a precipitator and a cationic surface active agent as a dispersant. In a hydrothermal condition, the corresponding soluble salt, the acid solution and the cationic surface active agent produce metallic oxide particles by a liquid deposition reaction; the loading of VIII metal also takes a corresponding soluble salt as raw material and carbamide as a precipitator; the adding of the precipitator and the generation of precipitation are separated by controlling reaction temperature in sections and even precipitation is realized to disperse the particles of the active components on the carrier evenly. The hydrogenation catalyst prepared shows good effects in the respects of desulfurization and denitrification activation and can greatly reduce the usage of the active components.

The invention relates to a method for producing low-aromatics solvent oil by hydrogenation. The method comprises the following steps of: passing raw material oil through a heating furnace, then fully mixing the raw material oil and hydrogen gas in an oil-gas mixer, and contacting with a hydrogenation catalyst in a lower hydrogen-oil volume ratio and under milder process conditions to undergo the common hydrogenated purification reaction. Compared with the conventional hydrogenated purification process, the method can achieve the same effect as the conventional purification process under milder process conditions. By the method, the low-sulfur and low-aromatics solvent oil products can be produced. In addition, the method also has the advantages of simple process flow, stable operation, high product properties and low energy consumption, and the new establishment of a hydrogenation device and the modification of the original device are both ok.

The invention discloses a heavy distillate oil hydrotreatment method, which comprises the following steps of: mixing an inferior heavy distillate oil raw material and hydrogen, passing through an upflow reactor, and carrying out demetallization and partial desulphurization and denitrification; allowing the obtained reaction effluent to enter a gas-liquid separation apparatus arranged on the upper portion of the upflow reactor; purifying the obtained gas, allowing the gas and the obtained liquid to pass through a hydrotreatment reactor in the way of gas-liquid countercurrent so as to carry out deep desulphurization and denitrification reactions. By series connection of specially-structured upflow reactor and countercurrent reactor, refining and conversion of high-sulfur, high-nitrogen and high-metal raw materials are realized so as to obviously raise the comprehensive impurity removal effect. Therefore, it is ensured that the activity of the hydrogenation catalyst is fully performed, and the service life of the catalyst is prolonged.

The invention relates to a catalyst carrier and a hydrogenation catalyst, and a preparation method of the hydrogenation catalyst. The method comprises the following steps: (1) making a gamma-alumina carrier contact with a mixture containing urea, a water-soluble salt of a group VIII metal element and water, carrying out heat treatment, drying the solid after heat treatment and then roasting, and thus obtaining a solid after roasting; (2) impregnating the solid obtained in the step (1) in an aqueous solution containing fluorine, drying, and roasting to obtain a modified gamma-alumina carrier; and (3) impregnating the modified gamma-alumina carrier obtained in the step (2) with a solution containing water-soluble salts of a group VIB metal and a group VIII metal. The invention also provides the hydrogenation catalyst prepared by the method and an application of the hydrogenation catalyst in hydrodesulfurization and/or hydrodenitrogenation. Compared with the prior art, the hydrogenation refined catalyst provided by the invention not only has the activity improved obviously, but also has the service life of the catalyst improved obviously.

The invention relates to a method for preparing a hydrogenation catalyst. The preparation method comprises the following steps of: dissolving salts of group VIB metals and group VIII metals in a hydrogen peroxide solution to obtain an impregnation liquid; impregnating the carrier by utilizing the impregnation liquid; and drying and roasting the impregnation product, thus obtaining the hydrogenation catalyst with double metal components. The method for preparing the load type hydrogenation refined catalyst has the advantages that the traditional impregnation method is improved, so that the interaction between active ingredients and the carrier is effectively weakened and the dispersion degree of the components on the carrier is improved. The hydrogen desulfurization and dearomatization activity of the catalyst prepared by the method is higher than that of the catalyst prepared by the traditional impregnation method and having the same active metal content.

The invention relates to a preparation method of a wax oil hydrogenation pretreatment refining agent; and the preparation method is characterized by comprising the steps of: adding zirconium hydroxide and silica sol into macroporous aluminum hydroxide dry gel powder; drying and carrying out high-temperature roasting to obtain silicon-zirconium modified aluminum oxide gamma-Al2O3 as carrier; and loading active hydrogenated metal oxide components such as tungsten, molybdenum, cobalt and nickel as well as auxiliary agents containing components such as phosphorus and fluorine by using an impregnation method.

The invention discloses a preparation method of a hydrofining catalyst composition. The catalyst composition is a bulk phase hydrofining catalyst composition, and comprises hydrogenation active metal components W, Ni and MO, and alumina. The preparation method of the catalyst composition comprises the following steps: preparing a nickel and aluminum mixed precipitate through an ammonia distillation and precipitation technology in the presence of an organic compound, preparing a tungsten, molybdenum and aluminum mixed precipitate through a parallel flow precipitation technology, mixing the nickel and aluminum mixed precipitate with the tungsten, molybdenum and aluminum mixed precipitate, ageing the obtained mixture, carrying out hydrothermal treatment and adding urea, and molding the finally obtained mixture to prepare the catalyst composition. The catalyst composition prepared through the method is especially suitable for being applied to ultra deep hydrodesulfurization and nitrogen removal reactions of diesel oil fractions, and has high hydrodesulfurization and hydrodenitrogenation reaction performances.

The invention relates to a preparation method of a high-activity inferior diesel oil hydrorefining catalyst. The method comprises steps that: a molding carrier and a salt solution of VIB metals are added into an autoclave; an inorganic acid is adopted as a precipitating agent; a zwitterionic surfactant and a fluorine-containing compound are adopted as a composite dispersant; an alcohol solvent and water are added into the autoclave, and a solvent thermal reaction is carried out for 12-36h under a temperature of 100-200 DEG C; a suspension obtained through the reaction is filtered; a filter cake is washed, dried, and baked, such that a fluorine-containing bimetallic catalyst is obtained; the bimetallic catalyst and a salt solution containing VIII metals are placed in the autoclave; an anionic surfactant is adopted as a dispersant, a certain amount of an alcohol solvent and water are added into the autoclave, and the mixture is subject to solvent thermal reaction for 12-36h under a temperature of 100-200 DEG C; the reaction product is filtered, washed, dried, and baked, such that the inferior diesel oil hydrorefining catalyst is obtained. With the method provided by the invention, the obtained catalyst has relatively high hydrodesulfurization activity and hydrodenitrogenation activity.

The invention relates to a method for preparing a loaded hydrofining catalyst. The method comprises the following steps of: dissolving metal salts into an aqueous hydrogen peroxide solution so as to obtain impregnation liquid; carrying out impregnation on a carrier by using the impregnation liquid; and drying and roasting an impregnation product so as to obtain the loaded hydrofining catalyst. The catalyst prepared by using the method disclosed by the invention is higher in active component dispersity and poor in interaction of active components and carriers, and has better hydrodesulfurization activity and hydro-dearomatization activity in comparison with a catalyst prepared by using the conventional impregnation method.

The invention discloses a hydrofining catalyst composition and a preparation method thereof. The catalyst composition is a bulk phase hydrofining catalyst and comprises hydrogenation active metal components W, Ni and Mo, an SAPO-11 molecular sieve and aluminum oxide, the content of surface phase active metal is high, the active site density is high, active metal is uniformly dispersed, the active metal is well coordinated and matched, the utilization rate of the active metal is high, and the pore structure of the catalyst is reasonable. The catalyst composition is high in mechanical strength, has high hydrodesulfurization and hydrodenitrogenation reactive properties, and is particularly suitable for being used in ultra-deep hydrodesulfurization and denitrification reactions of diesel fractions.

The invention discloses a hydrogenation catalyst and a continuous production method. The hydrogenation catalyst comprises, based on the weight of the catalyst, 61-92wt% of aluminum oxide supporter, active metal and auxiliaries, wherein the active metal is selected from one or more or from group VIII and/or group VIB metal elements and comprises based on the weight of oxide, 1-9wt% and preferably 1.0-5.0wt% of group VIII metal and 5-25wt% and preferably 10-20wt% of group VIB metal, and the weight percentage of the auxiliaries is 2-5wt% based on the weight of elements. The hydrogenation catalysthas the advantages that high surface active metal and auxiliary density in the catalyst is achieved, and the concentration of the active metal gradually increases from inside to outside along particle size. The method has the advantages that high hydrogenation active metal utilization rate is achieved, the surface acidity of the catalyst can be improved effectively, the inactivation speed of thecatalyst is slowed, continuous production of the hydrogenation catalyst is achieved, production efficiency is increased, and production cost is lowered.

The invention discloses a preparation method of a hydrofining catalyst, comprising the following steps of: mixing a complex impregnation liquid containing Group VIB and Group VIII metal, humic acid urea and boron compound with an alumina precursor, moulding, drying, and roasting to obtain the hydrofining catalyst. By the adoption of the method, loading and dispersity of active metal and a boron aid on the surface of alumina can be raised, and performance of the catalyst is further improved.

The invention discloses a hydrodesulfurization catalyst and a preparation method thereof. The catalyst comprises a modified alumina-based carrier and molybdenum and tungsten metal components, whereinthe modified alumina-based carrier contains nickel and cobalt metal components; the modified alumina-based carrier comprises main body modified alumina and rod-like modified alumina, the main body modified alumina is modified alumina with micron-sized pore channels, and at least part of the rod-like modified alumina is distributed on the outer surface of the main body modified alumina and in the micron-sized pore channels with the pore diameter D of 3-7 microns. The hydrodesulfurization catalyst has high hydrodesulfurization activity and hydrogenation carbon residue removal activity when usedin a residual oil hydrogenation reaction.