89results about How to "Concentrated hole distribution" patented technology

The invention discloses a mesoporous acid silicon-aluminum catalytic material which is of a pseudo boehmite crystalline phase structure. Based on the oxide weight, the anhydrous chemical expression of the material is (0-0.2)Na2O.(16-20)SiO2.(80-84)Al2O3, the specific surface area is 300-600m<2>/g, the pore volume is 1.0-2.0ml/g, the average pore size is 8-20nm, and the ratio of pyridine infrared B acid to L acid measured at 200 DEG C is 0.060-0.085. The material disclosed by the invention has obvious mesoporous characteristics and centralized pore distribution, and contains the centers of B acid and L acid at the same time; and moreover, the ratio of the B acid to the L acid is obviously increased, and the material obtains better light oil micro-activity.

This invention discloses a pseudoboehmite and its preparation method. This pseudoboehmite is prepared by following steps: a) at acidity condition that can make aluminum precipitate, precipitate aluminum of aluminum compound water solution, separate, and get a kind of amorphous alumina hydrate; b) mix amorphous hydrated aluminum oxide with water and at least one kind of water-soluble alkali, slurry, stabilize at 20deg-90deg for 0.2-6 hours, wherein dosage of above alkali make serumal pH be 6-11. Compared with existing technique, pseudoboehmite prepared by this invention can get aluminum oxide of bore distributing localized by calcining.

The invention discloses a preparation method of an aluminum oxide carrier. The preparation method comprises the following steps: firstly, performing neutralization reaction on an alkaline aqueous precipitator solution and an acidic aqueous aluminium salt solution to obtain precipitate slurry; secondly, adding water-soluble resin into the precipitate slurry, and performing aging treatment through microwave heating; finally, filtering, washing, drying and shaping the aged mixed material to obtain the final aluminum oxide carrier. The aluminum oxide carrier prepared by adopting the preparation method has a relatively large aperture and concentrated pore distribution, especially 10-20nm pores account for a large proportion of the total pore volume; the aluminum oxide carrier is suitable for being used as the carrier for a heavy oil hydrogenation catalyst.

The invention provides a silicon-aluminium catalytic material with a pseudo-boehmite crystal structure. By oxide weight, the anhydrous chemical formula of the catalytic material is (0-0.2)Na2O.(30-33)SiO2.(67-70)Al2O3, the specific surface area is 300-500m<2>/g, the pore volume is 0.5-1.5ml/g, and the mean pore size is 8-15nm. The catalytic material is characterized in that the ratio of pyridine infrared B acid to L acid, measured at 200 DEG C, in the catalytic material is 0.085-0.100. The silicon-aluminium catalytic material has the beneficial effects that the mesopore characteristic of the acidic silicon-aluminium catalytic material is obvious, the pores are distributed in a concentrated manner, meanwhile, the silicon-aluminium catalytic material contains B acid and L acid centers, the ratio of B acid to L acid is obviously increased and the material has better light oil micro-activity. Besides, the acidic silicon-aluminium catalytic material provided by the invention has higher degree of crystallinity.

A reactor and a method of preparing pseudoboehmite by the reactor are disclosed. The reactor comprises a reactor cylinder. A separating plate is disposed in the reactor cylinder to divide the inner cavity of the reactor into two zones along the axial direction. At least two material circulating pipelines are disposed outside the reactor cylinder. A circulated material outlet and a circulated material inlet in each material circulating pipeline are disposed in different zones. The circulated material outlets are at the upper part of the reactor cylinder and the circulated material inlets are at the bottom of the reactor cylinder. In each of the zones, the corresponding lower part of the reactor cylinder is provided with a material feeding port, and the corresponding upper part of the reactor cylinder is provided with an overflow port higher than the corresponding circulated material outlet. Continuous gel forming can be achieved by the reactor. Pseudoboehmite particles prepared by adopting the reactor are uniform in particle size, so that prepared aluminum oxide is large in pore volume, large in pore diameter and centralized in pore distribution, and the prepared aluminum oxide is uniform and constant in properties, and is not influenced by batch production scales.

The present invention discloses a hydrorefining catalyst preparation method. According to the method, a nickel aluminum precipitate is prepared through a positive adding method, a tungsten, molybdenum and aluminum precipitate is prepared through a parallel flow method, an organic amine is added during any one or two above gelatinization processes, the two precipitates are mixed, aging is performed, a hydrothermal treatment is performed while urea is added, and molding and the like are performed to prepare the catalyst. According to the present invention, the prepared catalyst is particularly suitable for super deep hydrodesulfurization and denitrification reaction of diesel oil distillates, and has high hydrodesulfurization and hydrodenitrogenation activity.

The invention provides a catalyst for hydrogenation refining, wherein the main active constituent of the catalyst is Ni, the auxiliary agent is Mo, the carrying agent is Ti-modified SiO2, the content of NiO is 20-60 wt%, the content of MoO3 is 0.5-10 wt%, the content of TiO2 is 2-20 wt%.

The present invention relates to preparation process of hydrocarbon hydroprocessing catalyst, which has gamma-Al2O3 as carrier, VIB and VIII metal as the active component, and Ti, etc as the active assistant, with the assistant Ti being introduced in the pH swinging carbonization process for producing aluminum hydroxide. The process of preparing the catalyst is one complete mixing and kneading process including the steps of introducing Ti to aluminum hydroxide powder via adding Ti salt solution, adding Mo and/or W containing alkaline solution, mixing and kneading until the aluminum hydroxide powder is wetted completely by the alkaline solution, adding Co and/or Ni containing acid solution, mixing and kneading to obtain plastic material, extruding, drying, and roasting to obtain the catalyst. The catalyst has homogeneously distributed Ti component and obviously raised performance.

The invention discloses a method for preparing a zirconia-alumina composite oxide carrier. An aluminum hydroxide sol and a zirconium-containing sol are prepared firstly, and then are mixed, aged, washed, filtrated and dried to obtain a composite oxide xerogel, accordingly, most of zirconia is distributed on the surface of alumina, the impact on a pore structure of the alumina is weakened, the co-catalysis of the zirconia is improved, the advantages of the alumina and the zirconia are fully utilized, and the obtained composite oxide carrier has the characteristics of large pore volume, high specific surface area, concentrated pore size distribution and controllable acidity, and is suitable for being used as a hydrogenation catalyst carrier.

The invention discloses a preparation method of an alumina dry glue containing silicon. The preparation method comprises the following steps: burning clay at a high temperature, then grinding the clay, sieving, adding an alkaline solution containing aluminum and an acidic solution containing aluminum into the clay which has been burned at a high temperature, carrying out a glue-forming treatment by adopting a parallel-flow method under proper conditions, filtering, washing, and drying so as to obtain the alumina dry glue containing silicon. The preparation method can organically combine clay and the generated alumina particles, adjusts the pore structure and acidity of the alumina containing silicon, and can further obtain silicon-containing alumina which has the advantages of uniform particle size and concentrated pore distribution. The alumina dry glue containing silicon is suitable for being used as a carrier component of a catalyst, which is applied to hydrogenation demetalization, hydrogenation desulfurization, or hydrogenation conversion of heavy oil or residual oil.

The invention discloses a preparation method of a copper-zinc catalyst, wherein the preparation method includes the following contents: (1) dissolving Cu and Al soluble salts in water to prepare a solution A, and preparing a sodium carbonate solution B; (2) merging the solution A and the solution B and adding into a reaction tank, gelatinizing, then aging in a stirring condition, and adding nano zinc oxide in the gelatinizing and/or aging process; (3) filtering the slurry obtained in the step (2), and carrying out hydrothermal treatment on the obtained material with water steam, wherein urea is added during hydrothermal treatment; and (4) washing, filtering, drying, roasting and molding the material obtained in the step (3), and thus obtaining the copper-zinc catalyst. The copper-zinc catalyst prepared by the method has large active component copper oxide density in an epiphase, the utilization rate of active metal copper is high, the copper and zinc distribution is more uniform, the cooperation effect of the active metal copper and the auxiliary agent zinc is enhanced, a pore structure of the catalyst is reasonable, the activity, selectivity, heat stability of the catalyst for methanol synthesis are improved and the service life of the catalyst for methanol synthesis is prolonged.

The invention discloses a hydrocracking method which comprises the following steps that a straight-run diesel oil raw material is in contact with a hydrocracking catalyst to carry out hydrocracking reaction, and an obtained hydrocracking product is separated to obtain heavy naphtha, diesel oil, a jet fuel and hydrogenation tail oil, wherein the used hydrocracking catalyst adopts a modified Y-shaped molecular sieve, amorphous silica-alumina and aluminum oxide as carriers, and the modified Y-shaped molecular sieve is an Y-shaped molecular sieve which is rich in meso pores and is concentrated in effective pore size distribution. The hydrocracking method is particularly suitable for a hydrocracking technology for carrying out hydro-conversion on straight-run diesel oil to produce the jet fuel, and has very high catalytic activity and aviation fuel product yield and the quality of a product is improved.

The invention discloses a preparation method of a bulk phase hydrogenation treatment catalyst. The composition of the catalyst includes hydrogenation active metal components W, Ni and Mo, alumina, and its preparation method is to prepare nickel and aluminum precipitate slurry I by acid precipitation method; adopt co-current precipitation method to prepare tungsten and aluminum precipitate slurry II, mix the two, after aging, hydrothermal treatment with water vapor and add urea, then combine with MoO ₃ After beating and mixing evenly, soaking in the solution containing organic compounds, and then forming and other steps to prepare the hydrogenation treatment catalyst. The catalyst is particularly suitable for application in ultra-deep hydrodesulfurization and denitrogenation reactions of diesel fractions.

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 discloses a making method of titanium aluminium hydroxide, which is characterized by the following: introducing adjuvant titanium in the gelling course of aluminium hydroxide through shaking pH value reciprocally; dispersing titanium evenly on the surface of aluminium hydroxide; enlarging the most probable aperture of titanium aluminium hydroxide.

The invention discloses a method for preparing silicon-containing alumina dry gel. The preparation method comprises the following steps: mixing original clay with a weak acid and a dispersant, then carrying out a hydrothermal treatment, grinding, sieving so as to obtain modified clay with a particle size larger than 160 meshes; then separately adding the modified clay into an aluminum-containing alkaline solution and an aluminum-containing acidic solution, carrying out a parallel-flow gel-forming treatment under a proper condition, filtering, water washing and drying so as to obtain the silicon-containing alumina dry gel. The preparation method can organically combine clay and the generated alumina particles, and adjusts the pore structure and acidity of the silicon-containing alumina so as to further obtain silicon-containing alumina which has the advantages of uniform particle size and concentrated pore distribution. The obtained silicon-containing alumina dry gel is suitable for being used as a carrier component of a catalyst for hydro-demetallization, hydro-desulfurization, or hydro-conversion of heavy oil or residual oil.

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.