82results about How to "Improve product properties" patented technology

The present invention is one process of hydrofining coked full fraction oil. Based on available process of hydrofining coked full fraction oil, new hydrogen of the system is used in further refining of diesel oil, so that diesel oil is refined under ideal thermodynamic and dynamic conditions. This results in high product quality, flexible, economic and practical technological process, less investment increment, fully utilization of heat energy and low operation cost. The present invention is suitable for reforming and constructing coked full fraction oil hydrofining apapratus.

The invention discloses a kind of catalysis crack method and its device in petroleum chemical industry, to solve the problems as the whole activeness reduction of mixed catalysts and the flexibility lack of adjusting the agent-oil proportion of heavy oil riser reactor caused by the mixing wise of the spend catalyst and regenerating catalyst of the present two-riser catalysis crack device. The main characteristics of the invention method are: part of the spent catalyst from the light hydrocarbon riser reactor (4) gets into catalyst mixer through the spent catalyst duct (3) set flow control valve (1) after water vapour stripped in the stripping section (7) of the second settler, and gets into heavy oil riser reactor (12) to react after mixed by the effect of water vapour with the regenerating catalyst form regenerator (14) in catalyst mixer. The method of the invention is suitable to be used in the two-riser catalysis crack craft and the three-riser catalyst crack craft set heavy oil riser reactor; the invention has disclosed related devices.

The invention discloses a method for hydrogenation of coal tar via a fluidized bed. The method comprises the following steps: subjecting a coal tar raw material to hydro-upgrading; carrying out separation to remove water; and then carrying out hydrorefining and fractionation so as to obtain a gasoline fraction, a diesel fraction and hydrogenation tail oil. A hydro-upgrading catalyst used in the method comprises iron oxyhydroxide, organic polybasic carboxylic acid, macroporous alumina, a molecular sieve and pseudo-boehmite; and a hydrofining catalyst used in the method comprises iron oxyhydroxide, organic polybasic carboxylic acid, macroporous alumina and a binder. The method provided by the invention adopts cheap iron oxyhydroxide as an active metal component, the hydro-upgrading catalyst and the hydro-refining catalyst are graded, so cost is low. According to the invention, moderate cracking of coal tar is carried out before refining of coal tar, so impurities in coal tar are effectively removed, product distribution and product quality are adjusted, and the running period of a device is prolonged.

A carrier of hydrocatalyst for the hydrocracking of heavy oil, hydromodifying of poor diesel oil, etc is prepared from amorphour silicon aluminium, modified beta-molecular sieve and aluminium oxide. Its preparing process is also disclosed. Said catalyst has high catalytic activity.

The invention discloses a hydrocracking catalyst carrier and a preparation method thereof. The hydrocracking catalyst carrier comprises: a modified beta molecular sieve, a modified Y type molecular sieve and alumina. Specifically, the modified beta molecular sieve is prepared by: subjecting a crystallized beta molecular sieve slurry directly to ammonium exchange and a template agent removal treatment, then first conducting a hydrothermal treatment, and performing an aluminum salt solution treatment, under the condition of maintaining a high beta molecular sieve crystallinity, removing part of non-framework aluminum uniformly, thus obtaining the beta molecular sieve with the characteristics of high Si / Al ratio, large specific surface area, appropriate acidity and acid distribution, and reasonable pore structure, etc. The modified beta molecular sieve especially has a suitable cracking effect and a very good isomerization effect on long-chain alkane and the long side chain alkyl of aromatic hydrocarbon and cyclane, and has a synergistic effect with the Y type molecular sieve, so that the prepared hydrocracking catalyst can have very high catalytic activity and middle distillate selectivity. And the condensation point of diesel fraction is substantially reduced, and the product properties of middle distillate are improved.

The present invention relates to a ketogenic diet and a preparation method thereof. The ketogenic diet comprises the following raw material components: 5-12 parts of medium chain triglyceride powder,3-5 parts of conjugated linoleic acid glyceride powder, 8-12 parts of collagen peptide powder, 2-15 parts of erythritol, 0.1-0.5 part of sucralose, 6-12 parts of resistant dextrin, 2-5 parts of cactusfruit powder, 10-30 parts of single cream powder, 10-15 parts of coffee powder and 10-14 parts of coconut microcapsule powder. The cactus fruit powder and coconut microcapsule powder are selected tofurther enrich the nutritional level of the product, also more beneficial for human body to absorb the nutrients of the various components and avoids a malnutrition problem caused by the ketogenic diet. Ketone has a strong satiety and a significant fat-reducing effect. The components are reasonably matched to avoid unpleasant taste brought by fat. The improvement of the preparation technology improves brewing property of nutritional powder.

The invention relates to a novel catalytic hydroprocessing thermal cracking-hydrotreating process of high-sulfur high-acid inferior heavy oil. In the process, a tail oil circulating method in which heavy oil catalytic hydroprocessing thermal cracking, distillate hydrotreatment and liquid cyolonic separation treatment of vacuum tail oil are combined is adopted. The novel catalytic hydroprocessing thermal cracking-hydrotreating process of high-sulfur high-acid inferior heavy oil has the characteristics of simple complexing agent dispersion, high distillate yield, good product property and less tailings throwing amount, and can be used for treating high-sulfur high-acid high-metal, high-carbon-residue high-asphaltene inferior heavy oil which is difficultly treated by using the existing processes such as fixed bed hydrocarcking, catalytic cracking and the like; and the yield of the distillate is up to 85%-90%, and the property of the product is good, thus the novel catalytic hydroprocessing thermal cracking-hydrotreating process of high-sulfur high-acid inferior heavy oil has great popularization and application prospects.

The invention relates to hydrocracking method with composite catalyst bed, which comprises: hydrofining the material, then hydrocracking in reactor that the material contacts with hydromodification catalyst with eyelet elite and 0~80% hydrocracking catalyst; the material passes the hydromodification catalyst bed or composite catalyste bed then the hydrocracking catalyst bed. Compared with prior art, this invention can improve reaction speed and handling capacity.

The invention discloses an outcrop cultivation method for a Chinese herbal medicine by using a 50cm mulch film, relating to the technical field of medicine cultivation. The method comprises the steps of carrying out outcrop cultivation on a seedling by using the 50cm mulch film during transplanting. The outcrop cultivation method is suitable for planting scutellaria baicalensis, astragalus and liquorice, remarkable in yield increasing effect and also capable of remarkably increasing the root length, root diameter and top-quality good rate and improving the commodity characteristic of the Chinese herbal medicine. According to the invention, natural resources such as light, heat, water, soil and the like are sufficiently utilized to ensure that the Chinese herbal medicine is vigorous in growth and further enhanced in cultivation of resilience and pest and disease resistance, so that the kinds and occurrence rate of pest and disease damages are correspondingly reduced, and the usage number and usage amount of pesticides are correspondingly reduced.

The invention belongs to the technical field of drug cultivation, and in particular relates to a drought-resistant cultivation method of codonopsis pilosula. The method is carried out according to thefollowing steps: step 1, land selection and soil preparation; step 2, fertilization; step 3, seedling selection; step 4, transplanting method; step 5, field management, step 6, disease and pest control; step 7, excavation; and step 8, storage. According to the drought-resistant cultivation method of the codonopsis pilosula, temperature can be increased and soil moisture can be maintained, therebyfacilitating yield improvement of medicinal materials; natural resources of light, heat, water, soil, etc. are fully utilized, so that Chinese herbal medicines grow vigorously, and resilience and pest and disease resistance are further enhanced, therefore, occurrence variety and incidence rate of diseases and insect pests are correspondingly reduced, use number and use amount of pesticides are reduced correspondingly, root length and root diameter of the codonopsis pilosula can be significantly improved, thereby increasing a ratio of first-class products, and improving commercial characters of the medicinal materials.

A hydrocracking catalyst and a preparing method thereof are disclosed. The catalyst comprises metal components with hydrogenation activity and a carrier comprising a beta molecular sieve, a Y type molecular sieve and aluminum oxide, wherein properties of the beta molecular sieve are as follows: the specific surface area is 400-800 m2 / g, the total pore volume is 0.4-0.55 mL / g, the SiO2 / Al2O3 mole ratio is 30-60, the relative crystallinity is 120-140%, the infrared acid content is 0.55-1.0 mmol / g, the non-framework aluminum accounts for less than 1% of the total aluminum, the amount of medium-strong acids which is measured by a NH3-TPD method accounts for 70-85% of the total acid amount, and the percent of Na2O is not more than 0.15 wt%. The preparing method includes mixing the beta molecular sieve, the Y type molecular sieve and the aluminum oxide, kneading and forming to prepare the carrier; and loading the metal components with hydrogenation activity by a conventional method. The beta molecular sieve which is proper in silicon aluminum ratio, large in specific surface area, proper in acidity, reasonable in pore structure and low in content of non-framework aluminum, and the and the Y type molecular sieve are adopted as cracking components of the catalyst. The prepared catalyst can be used for increasing the yield of diesel oil with a low condensation point and improving properties of chemical raw materials.

The invention discloses a hydrocracking catalyst carrier and a preparation method thereof. The catalyst carrier adopts a modified Y type molecular sieve and a beta molecular sieve to serve as a cracking center together, wherein the Y type molecular sieve is a large-grained and high-silicon Y type molecular sieve with centralized effective aperture distribution. The hydrocracking catalyst prepared from the carrier can be used for a hydrocracking process with high yield of high-quality middle distillate oil products, has the characteristics of high activity and good selectivity, and also can produce high-quality hydrogenation tail oil.

The invention discloses a hydrocracking method for producing low pour-point diesel. The method comprises the following steps: enabling a wax-containing diesel raw material to be in contact with a hydrocracking catalyst to perform a hydrocracking reaction, and carrying out separation on an obtained hydrocracking product to obtain heavy naphtha and the low pour-point diesel, wherein the hydrocracking catalyst is prepared from a hydrogenation active metal component and carriers; the carriers comprise a modified Y-type molecular sieve, a beta molecular sieve and aluminium oxide; the modified Y-type molecular sieve has the following properties that: an average diameter of crystal particles is 2.0 to 5.0mu m, relative crystallinity is 110% to 150%, a SiO2 / Al2O3 molar ratio is 10 to 50, a unit-cell parameter is 2.436 to 2.450nm, and a pore volume occupied by pores with a pore diameter of 2nm to 6nm is 60% to 90% of a total pore volume. The method is particularly suitable for processing the high pour-point wax-containing diesel under the medium-pressure condition, and has very high catalytic activity and diesel selectivity; moreover, the reduction extent of a pour point of a diesel fraction is large, and product properties of the diesel are improved.

The invention discloses a preparation method of a medium-oil hydrocracking catalyst carrier. The method comprises the steps that a beta-molecular sieve, a Y-molecular sieve, amorphous silica-alumina and a bonding agent are mixed, molded, dried and calcined to prepare the carrier, wherein the beta-molecular sieve is prepared through the steps that an amorphous silica-alumina precursor is prepared by adopting a specific acid-base precipitation method, then water, a silicon source and a template agent are added to obtain silica-alumina gel, two steps of dynamic crystallization, ammonium salt exchanging and template removing agent treating are sequentially conducted, and then the beta-molecular sieve is prepared. The beta-molecular sieve prepared through the method has the advantages of being high in crystallinity degree and silica-alumina ratio and good in stability, and the hydrocracking catalyst carrier prepared by taking the beta-molecular sieve as an acidic component of the hydrocracking catalyst carrier has the advantages of being good in activity, high in medium oil selectivity and good in product quality.

The invention discloses a preparation method of a middle distillate type hydrocracking catalyst. The preparation method comprises preparation of a carrier and loading of a hydrogenation active metal component, wherein a preparation method of the carrier comprises the following steps: mixing a beta molecular sieve, a Y molecular sieve, amorphous silica-alumina and an adhesion agent, shaping an obtained mixture I, and preparing the carrier by drying and roasting the shaped mixture I; a preparation method of the beta molecular sieve comprises the following steps: preparing an amorphous silica-alumina precursor by adopting a specific acid-alkaline precipitation method, then adding water, a silicon source and a template agent into the amorphous silica-alumina precursor to obtain silica-alumina gel, and carrying out two-step dynamic crystallization, exchanging with an ammonium salt and processing with a template stripping agent to obtain the beta molecular sieve. The beta molecular sieve prepared by the method provided by the invention has the characteristics of high degree of crystallinity, high silica-alumina ratio and high stability; the hydrocracking catalyst prepared by the method has the advantages of high activity, high middle distillate selectivity and high product quality.

The invention discloses a hydrogenation method of coal tar. The method includes performing hydrogenation modification of the coal tar raw material, separating to remove water, and performing hydrofining and fractionation to obtain a gasoline fraction, a diesel oil fraction and a hydrogenation tail oil, wherein a catalyst applied in the hydrogenation modification process comprises ferric oxyhydroxide, organic polybasic carboxylic acid, macroporous alumina, molecular sieve and pseudo-boehmite. The inventive method adopting the hydrogenation modification catalyst with the low-cost ferric oxyhydroxide as an active metal component has low cost, and can realize moderate cracking and refining of the coal tar, effectively remove impurities in the coal tar, adjust product distribution and properties, and extend running cycle of a device.

The invention relates to the field of petrifaction, and discloses a hydrogenation protection catalyst as well as a preparation method and application thereof. The hydrogenation protection catalyst comprises an alumina carrier and a metal oxide active component, and the preparation method comprises the following steps: uniformly mixing and kneading pseudo-boehmite, anthracene, biotite and an extrusion aid to obtain a mixture; uniformly mixing and kneading a peptizing acid solution and the mixture, shaping, drying and roasting to obtain an aluminum oxide carrier; adding a nonionic surfactant into the precursor aqueous solution of the metal oxide active component to form a mixed solution; and impregnating the alumina carrier in the mixed solution, drying, and roasting to obtain the hydrogenation protection catalyst. Anthracene is used as a pore-enlarging agent, and a better pore-enlarging effect is achieved. The mechanical strength of the carrier can be improved; on the other hand, the activity stability of the downstream main catalyst can be better protected. According to the hydrogenation protection catalyst, inferior heavy oil can be completely utilized, and the obtained mixed aromatic hydrocarbon product is high in yield and low in impurity content.

Disclosed herein are a printed circuit board and a manufacturing method thereof. The printed circuit board includes a rigid substrate having a solder resist applied thereon and a flexible substrate connected to the rigid substrate in order to increase productivity by simplifying a process of manufacturing the printed circuit board. The manufacturing method includes: attaching a coverlay onto an upper surface of the flexible substrate; attaching an electromagnetic interference (EMI) film onto an upper surface of the coverlay; attaching and pressurizing a substrate molding subsidiary material onto an upper surface of the EMI film; and separating the substrate molding subsidiary material.

The invention discloses a hydrocracking catalyst carrier and a preparation method thereof. The carrier contains a beta molecular sieve, a Y type molecular sieve and aluminum oxide, wherein the natures of the beta molecular sieve are as follows: the molar ratio of SiO2 / Al2O3 is 30-150, non-framework aluminum accounts for below 2% of total aluminum, and silicon atoms coordinated by a Si(OAl) structure account for above 95% of the silicon atoms in a framework structure. The preparation method comprises the following steps: mixing the beta molecular sieve, the Y type molecular sieve and aluminum oxide and forming for preparation. In the catalyst disclosed by the invention, the beta molecular sieve with a uniform framework silica-alumina structure and the Y type molecular sieve are jointly used as a cracking component, and the prepared catalyst has the characteristics of high activity, high yield of high-quality intermediate fraction oil and capability of simultaneously co-producing high-quality hydrogenation tail oil in a hydrocracking process.

The invention discloses an oyster-mushroom culturing medium. The oyster-mushroom culturing medium is characterized by being prepared from, by weight, 20-27 parts of corncobs, 13-20 parts of pepper straw, 1-3 parts of wheat bran, 1-2 parts of lime, 1-2.5 parts of bean cakes and 0.3-1 part of diammonium hydrogen phosphate. According to the oyster-mushroom culturing medium, oyster mushrooms can absorb nutrients, oyster-mushroom growth is promoted, the growth cycle is shortened, the yield is increased, and the quality is improved; meanwhile, the eggplant straw is fully used, and circulation utilization of waste is achieved.

The invention relates to a combining re-producing method for producing a top-grade lubricating oil product by using useless lubricating oil. The method comprises the following steps that firstly, fraction which is lower than 500 DEG C of the useless lubricating oil is excised through reduced pressure distillation, and the fraction which is higher than 500 DEG C is obtained; secondly, hydrogenation reaction is carried out on the fraction which is higher than 500 DEG C under the action of a catalyst, after gas-liquid separation is carried out, liquid is obtained and enters a normal pressure fractioning tower, shunting is carried out on the liquid, a naphtha is obtained on the top of the normal pressure fractioning tower, diesel is obtained in the middle of the normal pressure fractioning tower; thirdly, primary isomerism depressing reaction is carried out on a product at the bottom of the normal pressure fractioning tower under the action of a second catalyst, a product of the isomerism depressing reaction is subjected to the gas-liquid separation and flashing, and light oil and lubricating oil are obtained. According to the method, the distillate oil yield can be reached above 99%, the product quality is good, the high added value is high, and therefore the great generalization and application prospect is achieved.

The invention discloses an oyster-mushroom culturing medium. The oyster-mushroom culturing medium is characterized by being prepared from, by weight, 20-25 parts of corncobs, 15-20 parts of eggplant straw, 1-3 parts of wheat bran, 1-2 parts of lime, 1-2.5 parts of bean cakes and 0.3-1 part of diammonium hydrogen phosphate. According to the oyster-mushroom culturing medium, oyster mushrooms can absorb nutrients, oyster-mushroom growth is promoted, the growth cycle is shortened, the yield is increased, and the quality is improved; meanwhile, the eggplant straw is fully used, and circulation utilization of waste is achieved.

The invention relates to compost and a method for cultivating selenium-rich auricularia auricula. The compost and the method aim to solve the problems of low selenium content of existing cultivated auricularia auricula and the like. The method includes (1), uniformly mixing 35% of selenium-rich ribes nigrum pomace and branches, 43% of sawdust, 20% of wheat bran, 1% of lime and 1% of gypsum fibrosum with one another to obtain mixtures, adding water into the mixtures, sufficiently uniformly stirring the mixtures and the water to allow the water content of the mixtures to reach approximately 60% and regulating a PH (potential of hydrogen) value of the mixtures until the PH value reaches approximately 8.0; (2), mixing the mixtures, then immediately bagging the mixtures, forming openings, inserting rods into the mixtures, sterilizing and cooling the mixtures, carrying out inoculation and sealing the openings; (3), carrying out spawn running management; (4), accelerating germination and separating spawn in beds; (5), carrying out auricularia auricula producing management; (6), harvesting finished products to obtain the auricularia auricula after auricularia auricula fruiting bodies grow and are mature by 80%. The compost and the method have the advantages that raw materials for cultivating the selenium-rich auricularia auricula are reasonable in matching and high in selenium utilization rate and are in nutrition balance, auricularia auricula cultivation requirements can be met by C / N (carbon nitrogen ratios), and accordingly the compost and the method have broad development prospects.

The invention discloses a water soluble powder fertilizer for fruits and vegetables in the full bearing period. The fertilizer comprises the following components by weight: 62-68 parts of soluble salts, 12-15 parts of ammonium phosphate, 18-19 parts of urea, 0.5-1 part of sodium tetraborate, 0.6-0.8 part of zinc sulfate, 1-2 parts of an organic fertilizer and 1.2-1.8 parts of a trace element additive, wherein the soluble potassium is a mixture of potassium nitrate or potassium nitrate and potassium dihydrogen phosphate. The fertilizer is a novel high-concentration water soluble powder fertilizer developed in view of picking of the fruits and vegetables in full bearing period, and overcomes the shortcomings of the existing water soluble fertilizer, such as weak pertinency to growth period and weak functionality of trace elements addition.

The invention discloses a pleurotus geesteranus industrial cultivation method. The pleurotus geesteranus industrial cultivation method comprises the following steps of 1) mycelium culture, specifically, keeping the air temperature of a culture room at 24 + / -1 DEG C, controlling the CO2 concentration to be less than 2000 ppm+ / -50 ppm, enabling the air relative humidity to be 60%+ / -5%, and enabling the illumination intensity to be 0; 2) standardized bud pressing, specifically, rising the temperature to 24+ / -1 DEG C, removing a lantern ring, spraying atomized water to a bag opening, opening for ventilation to control the CO2 concentration to be less than or equal to 1000 ppm+ / -50 ppm, and starting humidification; (3) fruiting management, specifically, the atomized water is supplemented to the bag opening after the pileus diameter reaches 1.5 cm, the CO2 concentration is kept to be smaller than or equal to 1000 ppm+ / -50 ppm, the temperature is 22 DEG C+ / -1 DEG C, the air humidity is 80%+ / -5%, and after 24 hours, the pileus diameter reaches 4 cm; and 4) management in a period from ending of one flush of the pleurotus geesteranus to forming of another flush of the pleurotus geesteranus, specifically, after each flush of pleurotus geesteranus is harvested, timely cleaning pleurotus geesteranus roots, supplementing the atomized water to the bag opening, raising the temperature to 24 DEG C, reducing the air humidity to 70%, and culturing fungi for 10-15 days, and performing bud pressing and fruiting management of the next flush of pleurotus geesteranus according to the steps 2) and 3). According to the method, the commodity traits of a pleurotus geesteranus product can be significantly improved so as to improve the A-grade pleurotus geesteranus ratio.

The invention provides a catalyst for hydrogenation conversion of Fischer-Tropsch synthetic wax and a preparation method and application thereof. The catalyst comprises the following components: Ni, Whydrogenation metal, a Y-type molecular sieve, an isomerization molecular sieve and aluminum oxide; the preparation method of the catalyst comprises the following steps: firstly, mixing and pulping aluminum oxide and water, and then sequentially adding a USY molecular sieve and a Ni metal compound to form a mixture; secondly, putting the mixture into a closed reaction kettle for dynamic hydrothermal treatment; thirdly, after treatment, adding an isomerization molecular sieve, fully stirring, filtering, drying, adding dilute nitric acid, performing extrusion molding, and roasting; and finally,impregnating the W metallide by adopting an equivalent-volume impregnation method, drying and roasting to finally obtain the hydrocracking catalyst. The hydrocracking catalyst prepared by the methodprovided by the invention has appropriate acid properties, pore properties and metal dispersibility, can effectively reduce the secondary cracking performance in the hydrocracking process of Fischer-Tropsch synthetic wax, and improves the yield and product properties of light fuel oil.

The invention discloses a preparation method of a glossy ganoderma garlic tea and the product of the glossy ganoderma garlic tea, and belongs to the technical field of health-care foods. The processing method comprises the following steps: (1) cutting the fruiting bodies of the glossy ganoderma into slices, and performing extraction, filtration and separation; (2) cutting the garlic into slices, and performing extraction, filtration and separation; (3) performing decompression, concentration and freeze drying on a filtrate; (4) drying and recovering filter residues; (5) mixing the filter residues and extracts so as to prepare the glossy ganoderma garlic tea. According to the preparation method disclosed by the invention, fat-soluble beneficial components in the glossy ganoderma and the garlic are separated and extracted out in an ethyl ether extraction manner, the fat-soluble beneficial components and the filter residues of glossy ganoderma fruiting body slices and garlic slices are mixed to prepare the tea beverage, in the process of brewing the tea beverage with hot water, water-soluble components of water-soluble active polysaccharide and the like are released, and fat-soluble effective substances can also be well dissolved in the water to be absorbed by a human body, so that the utilization efficiency of beneficial components of the raw materials is improved, and the economic benefits are improved; besides, the glossy ganoderma garlic tea has favorable health-care efficacies of weariness resistance, improving the immunity of the human body and the like.

The invention discloses a habitat processing method and an application of scutellaria baicalensis. The method comprises the following steps that (1) in a step of knocking at a first time, the harvested fresh scutellaria baicalensis is aired and a cork on the surface of the scutellaria baicalensis is knocked off; (2) in a step of knocking at a second time, the scutellaria baicalensis processed in the step (1) is aired and knocked off until the scutellaria baicalensis is yellowish-brown, that is, a chromatic value of a Munsell color system is 5Y6 / (6-8) or 7.5YR5(4-8); (3) in a step of knocking at a third time, the scutellaria baicalensis processed in the step (2) is aired and knocked off until the scutellaria baicalensis is golden-yellow, that is, the chromatic value of the Munsell color system is 5Y8 / (8-12), 2.5Y7 / (8-10), 2.5Y8 / 10 or 5Y7 / 8; and (4) in a step of knocking at a fourth time, the scutellaria baicalensis processed in the step (3) is aired and knocked off until the scutellaria baicalensis is yellowish white, that is, the chromatic value of the Munsell color system is 5Y8 / (4-6) or 2.5Y8 / (4-8). The invention also provides an application of a method in medicinal material habitat processing. According to the method, the contents of main medicinal compositions including baicalin, baicalein and wogonoside of the scutellaria baicalensis medicinal material can be obviously improved, a good drug property of the medicinal materials can be formed, the specification grades of the medicinal material commodity are improved, and the grading of the medicinal materials is easily carried out.

The invention discloses a medium oil type hydrocracking catalyst and a preparation method thereof. The catalyst comprises a carrier and a hydrogenating active component; the carrier comprises a beta molecular sieve, a Y molecular sieve, amorphous silica-alumina and a binder; with the weight of the carrier as a benchmark, the content of the beta molecular sieve is 2-20 wt%, the content of the Y molecular sieve is 10-30 wt%, the content of the amorphous silica-alumina is 20-60 wt%, and the content of the binder is 15-40 wt%; the beta molecular sieve has the following properties: the SiO2 / Al2O3 molar ratio is 60-100, the specific surface area is 505-850 m<2> / g, the pore volume is 0.35-0.60 mL / g, and the relative crystallinity degree is 100%-148%; the relative crystallinity degree of the beta molecular sieve subjected to water steam hydrothermal treatment is more than or equal to 95%. The catalyst has the characteristics of relatively high activity, medium oil selectivity, and high product quality.