49results about How to "Reasonable hole structure" patented technology

The invention discloses a preparation method of a hydrocracking catalyst. The method comprises the steps of preparing an acidic mixed solution A containing hydrogenation reactive metals and silicon, preparing a sodium metaaluminate alkaline solution B, and then adding the acidic mixed solution A, the alkaline solution B and CO2 to a reaction tank filled with clear water in parallel to prepare gel; and then adding turbid liquid of a Y type molecular sieve, mixing the substances uniformly, filtering, drying and forming the mixture, and then washing, drying and roasting the product, thus preparing the hydrocracking catalyst. The method has the beneficial effects that a clean preparation method is adopted, so not only can the catalyst be easily formed and the strength of the catalyst be improved, but also the pore volume and specific surface area of the catalyst can be increased and the dispersity of metals in the catalyst can be improved, thus the catalyst has higher hydrocracking activity, middle oil selectivity and stability; and the catalyst prepared by the method can be used for a single-section hydrocracking process of a non-refining section or a one-section serial hydrocracking process of a refining section.

The catalytic cracking co-catalyst for increasing diesel oil yield is prepared through roasting kaolin at over 900 deg.c for in-situ crystallization. The co-catalyst contains type-Y zeolite in 5-20 wt%, as well as magnesia 0.5-3 wt%, RE oxide 0.5-5 wt%, and sodium oxide less than 0.6 wt%, and the zeolite has Si/Al ratio of 4.0-6.0. Adding certain amount of the catalytic cracking co-catalyst without altering the main catalyst in the oil refining apparatus can raise diesel oil yield of FCC catalyzed apparatus, improve product distribution, raise available catalyst utilization, and improve the activity stability of the catalyst system and heavy metal resistance.

The invention discloses a preparation method of a hydrotreating catalyst composition. The method comprises the steps of subjecting a salt mixed solution A in which CO2 is dissolved to react with an alkaline solution B containing aluminium to prepare gel, when reaction is completed, controlling the pH value of pulp in a reaction tank to be 7.0-9.0, preparing a mixture of an NixWyOz composite oxide precursor and an Al2O3 precursor, pulping the mixture and MoO3 to prepare a dry body, and then forming, drying and roasting the dry body to obtain a final catalyst, wherein the salt mixed solution A contains components Ni and W. The method has the beneficial effects that the problem that bulk phase catalysts are difficult to form is solved; the physical and chemical properties of the catalyst are adjusted, and the catalyst has the advantages of larger specific surface area, uniform pore distribution and high effective utilization rate of reactive metals; and the catalyst is especially suitable for the ultra-deep desulfurization reaction for producing ultra-clean diesel.

The invention provides a high-abrasion resistance lithium-containing iron series Fischer-Tropsch synthetic catalyst and a preparation method thereof. The catalyst comprises the following elements of: Fe, Cu, K, Li and SiO2 in a weight ratio of 100:(1.5-15):(1.5-15):(0.1-8):(10-60). The invention also provides a catalyst bonding agent for preparing the Fischer-Tropsch synthetic catalyst and a preparation method thereof and application of the catalyst bonding agent containing blending silica sol of lithium silicate and potassium silicate to the preparation of the high-abrasion resistance lithium-containing iron series Fischer-Tropsch synthetic catalyst. The catalyst bonding agent contains the blending silica sol of the lithium silicate and the potassium silicate, and lithium-ion and potassium-ion interactive arrangement chain sections are positioned on a polysilicate molecular chain. The lithium-containing iron series Fischer-Tropsch synthetic catalyst has high mechanical strength and hydrothermal stability and high Fischer-Tropsch synthetic activity, and is suitable to be used in a slurry reactor; and a preparation process is simple and is suitable for large-scale production.

The invention discloses an exterior wall environmental-friendly thermal insulation material. The exterior wall environmental-friendly thermal insulation material comprises, by weight, 70 to 75 parts of Portland cement, 17 to 20 parts of fly ash, 4 to 6 parts of a foaming agent, 1 to 2 parts of an aqueous epoxy resin, and 1 to 2 parts of an aqueous epoxy hardener. The advantages are that: the aqueous epoxy resin is high in bonding force, is capable of increasing bonding force of concrete among bubbles in foamed concrete layers so as to form a whole body, realize co-force loading, increase foamed concrete layer strength, and the binding firmness of foamed concrete layers with compact concrete layers; and in addition, after adding of the aqueous epoxy resin, thermal insulation layer surface is more smooth, after moulding, the morphology is more complete. The aqueous epoxy resin is also capable of achieving fixing and anti-cracking effects, and increasing structure strength and prolongingservice life obviously.

The invention relates to a preparation method of biomass-based nano-silica aerogel. The method comprises the following steps: acidifying straws used as a raw material by hydrochloric acid to remove impurities, pyrolyzing the acidified straws at a high temperature, and combing a high-speed vibration ball mill with an ultrasonic dispersion process to extract biomass-based nano-silica from the raw material straws; carrying out a heating reaction on the biomass-based nano-silica and a NaOH solution, and cooling and filtering the obtained solution to obtain a biomass-based water glass solution; adding sulfuric acid to adjust the pH value to 1-2, and dropwise slowly adding the NaOH solution to make the pH value reach 7-8, carrying out continuous stirring standing, and cleaning the obtained material with deionized water to remove impurities in order to synthesize biomass-based hydrogel; exchanging the hydrogel with an anhydrous ethanol solvent; and freeze-drying the exchanged biomass-based hydrogel by using a vacuum freeze drying machine to obtain the biomass-based nano-silica aerogel. The obtained nano-silica aerogel has the advantages of high specific surface area, reasonable pore structure, low apparent density and excellent thermal performance, can be used in the fields of buildings, medicines and chemical engineering catalysis materials, and realizes waste recycling.

The invention belongs to the technical field of continuous-casting functional refractory materials, and provides a continuous casting nozzle inner wall coating. The continuous casting nozzle inner wall coating is prepared from, by mass, 20%-40% of Bonite of which the particle size is larger than 0 mm and smaller than or equal to 1 mm, 40%-60% of a light porous material of which the particle size is larger than 0 mm and smaller than or equal to 1 mm, 5%-20% of alpha-Al2O3 of which the particle size is 325 meshes, 5%-20% of silica of which the particle size is 80 meshes, 5%-15% of a binding agent, 1%-5% of a thickening agent of which the particle size is 325 meshes and water, wherein the adding amount of the water accounts for 50%-100% of the total weight of the raw materials. A lining prepared from the coating has the lower size density and the reasonable pore structure, therefore, the heat conductivity of the lining is lower, the heat-insulating property is more excellent, the problem of matrix damage caused by mismatch of the thermal and mechanical properties does not exist, and the better social benefit and economic benefit are achieved.

The invention discloses a hydrotreating catalyst and a preparation method thereof. The catalyst is a bulk-phase catalyst; components of the hydrotreating catalyst comprise hydrogenation active metal ingredients W, Ni and Mo, and aluminum oxide, wherein the W and the Ni exist in the form of a compound oxide: NixWyOz; the Mo exists in the form of MoO3. The active-site density of the active metal W and Ni in the epiphase of the catalyst is high; the utilization rate of hydrogenation active metal is high; meanwhile, the pore structures of the catalyst are reasonable; the active metal is more uniformly dispersed; the mechanical strength is high; the hydrotreating catalyst is particularly suitably applied to the ultra-deep hydrodesulfurization and denitrification reactions of a diesel fraction.

The invention discloses a method for preparing a hydrogenation catalyst composition. The method comprises the following steps: preparing a mixture of a NixWyOz composite oxide precursor and an Al2O3 precursor by a coprecipitation method, using sodium meta-aluminate as an aluminum source, introducing a proper amount of CO2 gas during gelling process, beating and mixing with molybdenum oxide and anorganic solvent after gelling, molding and drying to obtain the catalyst. The method of the invention is capable of solving the problem of difficult shaping of a bulk phase catalyst and adjusting thephysicochemical property of the catalyst, possesses the advantages of large specific surface area, uniform aperture distribution, high effective utilization rate. The catalyst is especially suitable for producing super clean diesel oil in a super deep desulphurization reaction.

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 belongs to the technical field of catalyst production and provides a preparation method and application of a copper-silicon catalyst. The catalyst has the characteristics of high conversion rate of cyclohexanol and high selectivity of cyclohexanone. The catalyst provided by the invention mainly comprises Cu2O/SiO2; in addition, an active additive is added to improve an acid site on the surface of the catalyst, so that side reaction such as cyclohexane is effectively inhibited.

The invention relates to a preparation method capable of improving the low-temperature activity of a low-pressure cobalt-molybdenum sulfur-tolerant shift catalyst. The sulfur-tolerant shift catalyst which contains nano-molybdenum oxide and nano-cobalt oxide is produced directly by utilizing a conventional process capable of producing a spherical activated alumina carrier by adopting a quick release method. An impregnation process is omitted; the preparation is simple; the cost is low; catalytic active components are uniform; a porous structure is reasonable; the specific surface area is increased remarkably; the low-temperature activity is high; through the detection at 160 DEG C according to a national chemical industry standard HG/T2779-2009, the CO conversion rate is greater than or equal to 90 percent, the activation temperature is 40 DEG C lower than that of an SB303Q-type cobalt-molybdenum sulfur-tolerant shift catalyst; the low-pressure cobalt-molybdenum sulfur-tolerant shift catalyst is particularly suitable for a depth conversion workshop section of an ammonia synthesis plant, namely the conversion process in which the CO at an outlet of a conversion system is less than equal to 0.3 percent; steam is saved by 300kg per ton of ammonia; the energy-saving effect is remarkable.

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, amorphous silicon aluminum 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 amorphous silicon aluminum 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 amorphous silicon aluminum are adopted as cracking components of the catalyst. The prepared catalyst is characterized by producing a clean diesel oil product with a low condensation point with the highest yield, improving properties of hydrogenation tail oil, and the like.

The invention discloses a high-activity middle-oil type hydrogenation catalyst carrier and a preparation method thereof. A beta molecular sieve obtained through modification has a balanced cracking performance. The catalyst carrier comprises the following components in percent by mass in terms of a catalyst dry basis: 5%-20% of the modified beta molecular sieve, 20%-50% of amorphous silica-alumina, 20%-50% of macroporous alumina and 10%-25% of small-pore alumina. A catalyst prepared by using the catalyst carrier has the characteristics that the catalytic activity and middle-oil selectivity are high, the low-temperature performance of middle-distillate products is good, the smoke point of aviation kerosene is high, and the cetane number of diesel is high.

The invention relates to a trifluorotrichloroethane hydrodechlorination catalyst and a preparation method thereof. The active component of the catalyst is Pd-Ir-Ni alloy, the carrier is activated carbon, the catalyst comprises the following components in percentage by mass: 0.05 to 2% of Pd, 0.1 to 0.5% of Ir, 0.1 to 5% of Ni and the balance of activated carbon, the average particle size of the catalyst is 5 to 10nm, the average pore size of the catalyst is 0.8 to 2.2 nm, and the BET specific surface area of the catalyst is 800 to 1500m<2>/g. The catalyst is suitable for the hydrodechlorination reaction of trichlorotrifluoroethane, the noble metal content of the catalyst is low, the catalytic activity of the Pd-Ir-Ni solid solution alloy is high, and the catalyst is tightly combined with the carrier, and is high in stability and long in service life.

The invention discloses an aerated concrete block and a production method thereof, and relates to the technical field of building materials. The aerated concrete block is produced from, by weight, 2070-2100 parts of a slurry, 230-260 parts of cement, 200-220 parts of lime, 1.0-1.5 parts of aluminum powder, 4-6 parts of ferrosilicon powder, 0.5-1.0 part of a surfactant and 0.2-0.4 part of a water repellent; the slurry is a mixture of sands and water, and the proportion of the sands in the slurry is 55-60%; and the surfactant is tea saponin. The aerated concrete block adopting the above settingand proportioning of the system has a good strength, can effectively reduce the production cost, can be used as a building exterior wall, can meet the requirement of saving 65% of energy of a buildingwithout depending on other thermal insulation materials, and can reduce the construction procedures and reduce the load of the building due to the low volume weight.