48results about How to "Secondary hole" patented technology

The invention relates to a medium oil type hydrocracking catalyst and its preparing process, wherein the catalyst employs non-shaped silicon aluminium as carrying agent, and the particularity modified type Y molecular sieve is used as the acidic component, the molecular sieve possesses high degree of crystallization, low unit cell parameter, strong nitrogen resistant property and good destroying capability. The hydrocracking catalyst employing the molecular sieve has strong nitrogen resistant capacity.

The invention discloses a preparing method of deep aluminium-stripping Y-zeolite, which comprises the following steps: adopting NH4NaY with the content of Na2O not more than 2.5w%; proceeding first water heat disposal; utilizing high-density H+ ammonium salt solution to exchange to strip aluminium; proceeding second water heat disposal; removing non-frame aluminium through acid solution; setting the disposing temperature of second water heat disposal higher than the first one; improving crystallinity and silicon-aluminium rate with abundant secondary hole.

The invention relates to a composite molecular sieve-containing medium oil type hydrocracking catalyst, which comprises an active component and a binder, wherein the active component adopts amorphous SiO2-Al2O3 as a carrier, adopts a composite molecular sieve as an acid component, and adopts a group VIB metal and a group VIII metal as hydrogenation activity components, and the composite molecular sieve comprises a Y molecular sieve and a ZSM-23 molecular sieve. According to the present invention, the deep dealuminzation modified Y molecular sieve has characteristics of high crystallinity, large surface area, high silica-alumina ratio, low cell constant, rich secondary pore, low acid center density, high moderate-intensity acid center ratio, and the like; the modified ZSM-23 molecular sieve has characteristics of smooth pore channel, less acid center and outstanding isomerism performance, wherein a light naphtha component is isomerized so as to increase an octane number of naphtha; the composite molecular sieve compounded from the Y molecular sieve and the ZSM-23 molecular sieve is adopted as the acid cracking component so as to provide advantages of the Y molecular sieve and the ZSM-23 molecular sieve, and compounding is performed according to the ratio of the present invention, such that the best catalysis effect can be obtained, and the obtained catalyst is suitable for the medium oil type hydrocracking catalyst; and the catalyst prepared from the composite molecular sieve has characteristics of excellent medium oil selectivity, good activity and good stability.

The invention discloses a preparation method for a small-grain Y type molecular sieve. According to the method, a NaY type molecular sieve raw material with a high silica-alumina ratio, a high degree of crystallization and good stability is employed and successively undergoes alkali washing, ammonium exchange, aluminum removal and silicon supplement, hydro-thermal treatment and treatment with a mixed solution of acid and an ammonium salt; and the obtained small-grain Y type molecular sieve has a high SiO2/Al2O3 mol ratio and a high proportion of secondary pores, remains the stability of a Y type molecular sieve and has a high specific surface area and a high degree of crystallization. The small-grain Y type molecular sieve prepared in the invention is applicable as a cracking component for a hydrocracking catalyst used for high and medium oil and enables the hydrocracking catalyst to have good activity, medium oil selectivity and product properties.

The invention discloses a hydrocracking catalyst carrier and a preparation method of the hydrocracking catalyst carrier. The hydrocracking catalyst carrier is prepared by using modified Y zeolite, aluminum oxide and amorphous silicon-aluminum. The modified Y zeolite has the following physiochemical properties: the mole ratio of SiO2 to Al2O3 is 30-120; the lattice constant is 2.420-2.435nm; the relative crystallinity is more than or equal to 90%; the specific surface area is 750-850m<2>/g; the secondary pore with 1.7-10nm accounts for more than 50% of the total pore volume; the infrared acidity is 0.10-0.50mmol/g; the ion exchange capacity is less than or equal to 0.10%; and the water adsorption quantity is less than 5.0% in percentage by weight at 25 DEG C and P/P0 of 1.0. The preparation method of the catalyst carrier provided by the invention comprises the following steps: mechanically mixing the modified Y zeolite, aluminum oxide, amorphous silicon-aluminum and adhesive, grinding, extrusion-moulding, drying and calcining to obtain the catalyst carrier. The catalyst carrier prepared by using the modified (deeply dealuminated) Y zeolite as the acidic cracking component is suitable to be used as the hydrocracking catalyst for middle distillates oil.

The invention discloses a carrier and an application thereof. The carrier contains an aluminum-removal Y-type molecular sieve and a heatproof inorganic oxide. The invention also discloses a catalyst by employing the carrier and a preparation method and an application thereof. The invention further discloses a hydrocracking method of the catalyst. According to the molecular sieve in the carrier, the molecular sieve has high crystallization degree and abundant secondary pores, and has lower non-framework aluminum content. The catalyst is prepared by VIII metallic element and VIB metallic element loaded on the carrier, the catalyst displays better catalysis performance in a hydrocracking reaction, and can obtain good balance among catalytic activity, middle distillate selectivity and tail oil BMCI value.

The invention provides a hydro-upgrading catalyst as well as a preparation method and an application thereof. The hydro-upgrading catalyst comprises a carrier and an active metal component loaded on the carrier, the carrier comprises a matrix and a Y molecular sieve, and the cell constant of the Y molecular sieve is 2.415-2.440 nm; the ratio of the peak area of a resonance signal with chemical shift of 0+/-2ppm in a 27Al MAS NMR spectrum of the Y molecular sieve to the total peak area is not more than 4%; and the strong acid amount of the Y molecular sieve accounts for 70% or above of the total acid amount. According to the hydro-upgrading catalyst, the Y molecular sieve with high silica-alumina ratio, less non-framework aluminum, large specific surface area, rich secondary pores and high strong acid center proportion is used, so that the polycyclic aromatic hydrocarbon hydrogenation saturation and ring opening performance of the catalyst is enhanced, and the aromatic hydrocarbon selective hydrogenation ring opening of the catalyst is high and good in selectivity; and the cetane number of the diesel oil can be remarkably increased while the high diesel oil yield is maintained in the hydro-upgrading process of the inferior diesel oil.

The present invention provides one-section hydrogenation process for producing food level white oil. By using vacuum gas oil, deasphalted solvent oil and Fischer-Tropsch process oil as material, and hydrogenating catalyst containing modified beta-molecular sieve in 1-9 wt%, and through hydrocracking inside a hydrocracking co-current reactor to obtain reaction product, hydrorefining in a countercurrent hydrorefining reactor with flash region to exhaust gas and liquid hydrocarbon, the reverse contact reaction between the downward flowing liquid hydrocarbon and the bottom entering newly formed hydrogen in the bed layer with reduction type hydrogenating catalyst, and final gas-liquid separation and product distillation, food level white oil is produced. The process is simple and has high product quality.

The invention discloses a modification method for a small-grain NaY type molecular sieve. According to the method, a NaY type molecular sieve raw material with a high silica-alumina ratio, a high degree of crystallization and good stability is employed and successively undergoes alkali washing, ammonium exchange, aluminum removal and silicon supplement, hydro-thermal treatment and treatment with a mixed solution of acid and an ammonium salt; and the obtained small-grain Y type molecular sieve has a high SiO2/Al2O3 mol ratio and a high proportion of secondary pores, retains the stability of a Y type molecular sieve and has a high specific surface area and a high degree of crystallization. The small-grain Y type molecular sieve prepared in the invention is applicable as a cracking component for a hydrocracking catalyst used for high and medium oil and enables the hydrocracking catalyst to have good activity, medium oil selectivity and product properties.

The invention relates to a hydrocracking method for producing high-octane gasoline, which comprises the following steps: reacting a diesel oil raw material in a hydrofining reaction zone and a hydrocracking reaction zone I, and separating to obtain a gasoline fraction, a middle fraction and a tail oil fraction. Wherein the middle fraction returns to the hydrocracking reaction zone I for further conversion, and the tail oil fraction enters the hydrocracking reaction zone II for further conversion. According to the method, polycyclic aromatic hydrocarbons in the middle fraction and the tail oil fraction are converted to the maximum extent, high-octane gasoline fractions are produced, the RON of the gasoline fractions can reach 93 or above, and the loss of total aromatic hydrocarbons is small.

The invention discloses a hydrocracking catalyst carrier and a preparation method thereof. The catalyst carrier is composed of a small-grain Y type molecular sieve, amorphous silica-alumina and alumina. According to the preparation method, the small-grain Y type molecular sieve with the characteristics of proper dealumination degree, good crystallinity retentivity and well-developed secondary pores is used as an acid component; and when the small-grain Y type molecular sieve and the amorphous silica-alumina are cooperatively used for preparing a hydrocracking catalyst, the hydrocracking catalyst has the advantages of good activity, heavy naphtha selectivity and superior product quality.

The invention discloses a preparation method of medical intermediate hexadecahydropyrene. The preparation method comprises the following steps: after coal tar raw materials are pretreated, carrying out hydrofining and hydrocracking reactions to fractionate the obtained liquid; feeding the obtained diesel oil fraction into a supplementary refining reaction area, and carrying out a hydrogenation saturation reaction under the action of a supplementary refining catalyst; and cutting the supplementary refining product, cooling the obtained fraction, and carrying out filtering to obtain high-purityhexadecahydropyrene. According to the method, the purpose of producing hexadecahydropyrene from the coal tar raw materials by using a hydrogenation process is achieved for the first time. Compared with the prior art, the method disclosed by the invention has the advantages that the high-purity hexadecahydropyrene is obtained, and meanwhile, quality of byproducts meets the requirements of clean fuel oil products and solvent oil products. The method disclosed by the invention improves economic performance of coal tar processing, and has the characteristics of simple process and low operation energy consumption.