63results about How to "Play a role in expanding holes" patented technology

The invention discloses a catalyst carrier for coal liquification oil hydrogenation on boiling bed and the preparation method. Besides normal hydrogenation catalyst carrier component, the catalyst aslo contains aluminium oxide fiber, the content of which in carrier is 3- 10wt%. The mechanical strength and wearing resistance of catalyst are strong, which increases carrier stability and life length and reduces production cost. The active aluminium oxide utilization can increase the hydrogeneration activity and stability.

The invention discloses a preparation method of a diatomite / molecular sieve composite material for adsorbing volatile organic pollutants. The preparation method is characterized in that diatomite as asuperior mineral resource of Jilin province is taken as a raw material, and the surface and pores of the diatomite are modified by using strong acid and strong alkali, so that the purity of the diatomite is improved, and the aperture is enlarged through dissolution so as to prevent the pores from being blocked and improve the zeolite load rate. Then, a nano zeolite seed crystal is loaded on the surface of the modified diatomite, and a dense nano zeolite membrane further grows on the surface of the diatomite through hydrothermal treatment. Compared with original diatomite, the prepared diatomite / molecular sieve composite material has the advantages of great improvement on the aspects of specific surface area and pore volume, and good adsorption effect on volatile organic pollutants such asacetone, ethyl acetate and methylbenzene. As proved by the experiment result, the diatomite / molecular sieve composite material has the advantages of selective adsorption. Moreover, the material can be widely applied to industrial production by being prepared into particle adsorbents with clay.

The invention belongs to the technical field of fruit tree planting equipment and in particular discloses peach tree planting equipment. The peach tree planting equipment comprises a rack, wherein a mounting seat is arranged on the upper part of the rack; a servo motor with a downward output shaft is arranged on the mounting seat; the output shaft of the servo motor is rotationally connected withthe rack; a drill bit is arranged on the output shaft of the servo motor; a rotating disc is fixedly connected onto the servo motor; multiple vertical rods are arranged on the rack; supporting rods are arranged on the lower parts of the vertical rods; torsional springs are arranged between the supporting rods and the vertical rods; scrapers are arranged on the supporting rods; push plates are arranged on the supporting rods; bulges are formed on the rotating disc; supporting columns are arranged at the lower end of the rack; a supporting plate is arranged at the lower end of each supporting column; and a spring is connected between each supporting column and the inner wall of the cavity structure. The equipment disclosed by the invention is mainly used for peach tree planting and hole digging, and the problem that soil easily slides into holes to influence peach tree planting if soil produced during hole digging is not transferred away from the holes can be solved.

The invention discloses a process for preparing a hydrocracking catalyst. A method for the process includes the following steps: (1) adopting the mixing kneading method to prepare a hydrocracking catalyst containing a group VIII metal based organic acid salt, and processing wet materials through vapor after formation; (2) preparing a high-concentration metallic solution containing group VIB hydrogenation active constituents; (3) adding the catalyst, containing the group VIII metal, processed through vapor in step (1) into the metallic solution prepared in step (2) for dipping, and then filtering, drying, and roasting to prepare the finished hydrocracking catalyst. The method provided by the invention can be used to prepare the hydrocracking catalyst with high metal dispersion, and the preparation process is clean without NOx emissions.

The invention discloses a monodispersed iron-based catalyst for Fischer-Tropsch synthesis as well as a preparation method and an application thereof. The catalyst comprises a carrier silicon dioxide and an active component iron, the carrier silicon dioxide has a mesoporous spherical particle structure, the carrier silicon dioxide covers the active component iron, and the active component iron is in nanometer granular shape and is distributed uniformly; the particle size of the carrier silicon dioxide is 140-160nm. In the preparation method, the pressure of CO2 is adjusted, the morphology of the catalyst is changed into uniform spherical shapes from disc shaped accumulation, so that the iron nanometer particles are in the spherical silicon dioxide and covered by silicon dioxide, sintering of the iron nanometer particles is prevented, and appearance of materials which are difficult to reduce is avoided. The iron-based catalyst is applied to preparation of alpha-olefin, a new process route of alpha-olefin is provided, synthetic gas is used as a raw material, and in the effect of the iron-based catalyst, alpha-olefin is directly synthesized. The iron-based catalyst has excellent performance, and alpha-olefin with a long chain has high selectivity.

The invention discloses a hydrodemetallization catalyst and a preparation method thereof. The hydrodemetallization catalyst comprises a carrier and a hydrogenation active metal component, wherein thecarrier is an aluminum oxide-based carrier and comprises main body aluminum oxide and rod-like aluminum oxide, the main body aluminum oxide is aluminum oxide with micron-sized pore channels, and at least a part of the rod-like aluminum oxide is distributed on the outer surface of the main body aluminum oxide and in the micron-sized pore channels with the pore diameter of 3-10 microns; wherein thelength of the rod-like aluminum oxide is 1-12[mu]m, the diameter of the rod-like aluminum oxide is 80-300nm, and the content of the hydrogenation active metal on the rod-like aluminum oxide on the outer surface of the catalyst is higher than the content of the hydrogenation active metal in the bulk phase of the catalyst. The hydrodemetallization catalyst disclosed by the invention is strong in metal deposition resistance and carbon deposition resistance, good in activity and stability, and suitable for the hydrotreating process of heavy oil.

The invention relates to a method for hydrorefining petroleum wax. According to the invention, alumina is used as a carrier of a hydrorefining catalyst, and an active component in the catalyst is one or two selected from the group consisting of NiO, MoO3 and WO3, wherein, the content of NiO accounts for 2 to 7% of the total weight of the catalyst, and the content of MoO3 and / or WO3 accounts for 20 to 32% of the total weight of the catalyst; the content of SiO2 accounts for 1 to 9% of the total weight of the catalyst, and the content of P2O5 accounts for 1 to 7% of the total weight of the catalyst; the catalyst has a specific surface area of 120 m<2> / g to 190 m<2> / g, a pore volume of 0.30 ml / g to 0.55 ml / g, pores with a pore diameter of 5 nm to 14 nm account for 40 to 70% of the whole pore volume, and pores with a pore diameter of 20 nm to 40 nm account for 20 to 40% of the whole pore volume; the alumina carrier has a double-peak pore structure, the pore wall of a macroporous tunnel has weak surface acidity, and pore wall of a microporous tunnel has strong surface acidity.

The invention discloses a catalyst carrier for coal liquification oil hydrogenation on boiling bed and the preparation method. Besides normal hydrogenation catalyst carrier component, the catalyst aslo contains aluminium oxide fiber, the content of which in carrier is 3- 10wt%. The mechanical strength and wearing resistance of catalyst are strong, which increases carrier stability and life length and reduces production cost. The active aluminium oxide utilization can increase the hydrogeneration activity and stability.

The invention discloses a residual oil hydrogenation demetallization catalyst and a preparation method thereof. The catalyst includes a modified alumina-based carrier and a second active metal component, the modified alumina-based carrier is a modified alumina-based carrier containing the first active metal component, and the modified alumina-based carrier includes Main body modified alumina and rod-shaped modified alumina, the main modified alumina is modified alumina with micron-scale pores, wherein at least part of the rod-shaped modified alumina is distributed on the outer surface of the main modified alumina and In the micron-scale channel with a pore diameter D of 3-10 μm, the rod-shaped modified alumina has a length of 1-12 μm and a diameter of 100-300 nm. When the hydrodemetallization catalyst is used for the hydrodemetallization of heavy oil, it has high activity and activity stability.

The invention discloses a residual oil hydrogenation demetallization catalyst and a preparation method thereof. The method includes: (1) impregnating the physical pore-enlarging agent with the impregnating liquid I containing the first active metal component, and then drying to obtain a modified physical pore-enlarging agent; (2) using the modified physical pore-enlarging agent obtained in step (1) The pore expander is kneaded with pseudo-boehmite and the second active metal component source, and then dried and roasted to obtain the modified alumina carrier SI; (3) The modified alumina carrier SI obtained in step (2) is immersed in ammonium bicarbonate solution, and then sealed for heat treatment. After heat treatment, the material is dried and roasted to obtain the modified alumina carrier SII; The aluminum carrier SII is dried and calcined to obtain the hydrodemetallization catalyst. When the hydrodemetallization catalyst prepared by the method is used as a heavy oil hydrodemetallization catalyst, it has high activity and activity stability.

The invention discloses an alumina carrier, a hydrogenation demetallization catalyst and a preparation method thereof. The alumina carrier includes host alumina and rod-shaped alumina, at least part of the rod-shaped alumina is distributed on the outer surface of the host alumina and in micron-sized pores, and the alumina carrier has a pore diameter of 15-35nm and 100-800nm. Bimodal pore distribution. The alumina carrier is prepared by the following method, including: (1) preparing an alumina carrier intermediate; (2) immersing the alumina carrier intermediate in an ammonium bicarbonate solution, and then sealing and heat-treating the material, drying and roasting the material after heat treatment, An alumina support is produced. The alumina carrier can take into account large pore size, high specific surface area and mechanical strength, and is suitable for heavy oil hydrodemetallization catalysts.

The invention discloses a preparation method of a hydrodesulfurization catalyst. The method comprises: (1) sequentially adsorbing an aluminum salt solution and an alkaline solution by a physical pore-enlarging agent, then drying and calcining to obtain a modified physical pore-enlarging agent; (2) applying the modified physical pore-enlarging agent obtained in step (1) to (3) The intermediate obtained in step (2) is immersed in ammonium bicarbonate solution, and then sealed and heat-treated. After heat treatment, the material is dried and calcined to obtain an intermediate. Modified alumina-based carrier; (4) Impregnating the modified alumina-based carrier obtained in step (3) with the hydrogenation active metal component impregnation liquid, drying and calcining to obtain a hydrodesulfurization catalyst. The hydrodesulfurization catalyst prepared by the method has the characteristics of good macromolecular diffusion performance, strong desulfurization ability and high residual carbon removal rate.