33results about How to "Good peptization" patented technology

The present invention relates to a preparation method of hydrogenation treatment catalyst. Said catalyst is prepared by loading molybdenum, nickel and phosphorus on a phosphorus and silicon contained alumina carrier prepared by adopting a special method, and said carrier prepared by special method is prepared by adding phosphorus adjuvant in the course of precipitation and ageing process and adding nano silicon-containing compound in the course of carrier forming process, for example, adding silicon dioxide. As compared with existent catalyst it has higher activity for hydro-desulfurization and hydro-denitrification of heavy oil, specially heavy fraction.

The invention refers to a kind of aluminium oxide carrier containing phosphorus and silicon and the manufacturing method, the silicon disperses evenly on the surface of the carrier, the 3~15nm hole capacity accounts for over 90% of the whole hole capacity. The adding mode of assistant is: adds in assistant phosphorus in the sediment and aging process, adds in assistant silicon in the forming period, the assistant silicon is nano silicon dioxide. The craft is easy, the cost is low; and it has a good performance.

The invention discloses a petroleum wax hydrogenation catalyst and its preparing method, adopting the Si- and P- containing aluminum hydroxide prepared by CO2 netur neutralization process to act as a carrier material of catalyst, where the Si and P auxiliaries are added in steps, some Si- and P- containing compounds mix with sodium meta-aluminate solution to form a glue, some Si-containing compounds are added after the glue is formed or in the ageing process, and most P-containing compounds are added in the process of peptizing or pulping the produced aluminum hydroxide after washed, thus making most Si and P are distributed on the surface of aluminum hydroxide, effectively give full play to the Si and P cooperatively regulating surface physico-chemical property and hole structure of the catalyst. Its preparing process is simple and low-cost. It has good activity and selectivity as processing petroleum waxes including high-melting point petroleum wax.

The invention discloses an aging method of pseudo-boehmite prepared by a carbonation method. The method concretely comprises the steps of enabling the pseudo-boehmite prepared by the carbonation method to form gel, and then rapidly carrying out on solid-liquid separation; after that, putting a filter cake attached with mother liquor into a closed container, heating and aging. The aging method is simple in technology, low in energy consumption, high in productivity and low in production cost; the prepared pseudo-boehmite product is pure in crystalline phase, high in degree of crystallinity, good in gel dissolubility, less in impurity and wide in use.

The invention relates to a phosphorus- and silicon-containing alumina carrier and a preparation method thereof. Silicon is uniformly dispersed on the surface of the alumina carrier, and the pores of the carrier with a diameter of 3 to 15 nm account for more than 90% of the total pore volume. The method of adding the carrier auxiliary agent in the present invention is as follows: adding auxiliary agent phosphorus during the precipitation aging process, adding auxiliary agent silicon during the carrier molding process, and the raw material of the auxiliary agent silicon is nano silicon dioxide. Adopting the method of the invention to prepare the phosphorus-containing and silicon-alumina carrier, the molding is easy, the process is simple, and the cost is low; at the same time, it has excellent physical and chemical properties and performance, especially has concentrated pore distribution and suitable surface acidity, and is suitable for heavy fractions Carrier for catalysts such as oil hydrodesulfurization and denitrogenation.

The invention discloses a preparation method of pseudo-boehmite, which comprises the following steps: (1) preparation of sodium metaaluminate solution; (2) preparing Al 2 o 3 Concentrated sodium metaaluminate solution and aluminum sulfate solution are added to the reaction kettle at the same time in a certain proportion and reacted. After the reaction, the slurry is transferred to another gas-liquid reaction kettle, and carbon dioxide gas is introduced into the gas-liquid reaction kettle. And control the volume ratio of air and carbon dioxide to react; (3) aging, exchange washing, filtering and drying the obtained product to obtain the pseudo-boehmite dry powder specially used for ceramic corundum abrasives. The pseudo-boehmite prepared by the invention has very low impurity content, good peptization, good gel-forming performance, transparent glue, high glue viscosity and good bonding performance, and is a special pseudo-boehmite for ceramic corundum abrasives. Moreover, by adopting the method, the output of the single-pot pseudo-boehmite can be greatly increased, thereby greatly reducing the production cost.

The present invention belongs to the field of heavy oil and residual oil hydrotransforming technology. The heavy oil and residual oil hydrotransforming catalyst has siliceous alumina carrier, relatively strong acidity and especially protonic acid amount higher than that in available residual oil hydrotransforming catalyst. The siliceous alumina carrier is prepared through one colloid forming process, during and after which silicon is added to make alumina possess more strong acid centers and ideal pore structure. The catalyst of the present invention is used in the hydrotransforming treatment of heavy oil, residual oil and other inferior oil material.

The invention discloses a method for preparing a catalytic cracking catalyst, which comprises steps of mixing and pulping aluminum binder and acid. The method is characterized by also comprising steps of adding alkali into slurry to improve the pH value of the slurry, and then adding the acid into the slurry to reduce the pH value of the slurry. The method can stabilize the quality of the prepared catalyst.

The invention discloses preparation methods for a macroporous alumina carrier and a hydrodemetallization catalyst. The preparation method for the macroporous alumina carrier includes the following steps: (1) dry pseudoboehmite gel powder is hydrothermally processed under high pressure; (2) the dry pseudoboehmite gel powder obtained in step 1 is kneaded into a plastic, and pore-expanding agent is added in step 1 or step 2; (3) the plastic obtained in step 2 is shaped, the shaped material is dried and baked, and thereby the macroporous alumina carrier is obtained. The impregnation method is adopted to prepare the hydrodemetallization catalyst. The hydrodemetallization catalyst prepared by the method has large pore volume and pore diameter, centrally distributed pores, moderate mechanical strength and high activity and activity stability.

The invention relates to a preparation method of a hydrogenation catalyst. The catalyst is prepared by loading molybdenum, nickel and phosphorus on a phosphorus-containing and silicon-alumina carrier prepared by a special method. The carrier prepared by the special method is obtained by aging It is prepared by adding phosphorus additives during the process and adding nano-silicon-containing compounds such as silicon dioxide during the carrier molding process. Compared with the existing catalysts, the catalyst of the present invention has a large pore volume, a high specific surface area and a more concentrated pore size distribution under the premise of ensuring that it contains a relatively high hydrogenation active metal component, and is suitable for the hydrotreating of heavy oil, especially Shows higher activity in hydrodesulfurization and denitrogenation of heavy distillates.

The invention discloses a technology for preparing pseudo-boehmite by a sodium bicarbonate neutralization method, which comprises steps: using NaHCO3 solution and sodium aluminate solution to carry out acid-alkali neutralizing reaction so as to prepare pseudo-boehmite; and after neutralizing reaction, separating, ageing, washing, drying and grinding material to prepare pseudo-boehmite. As reaction mother solution does not contain acid radical ions, processes and devices are not corroded, and simultaneously CO2 gas is pumped into mother solution for depth carbonization to form NaHCO3 solution,and neutralization reaction can be conducted repeatedly, thus fully using production raw material and reducing production cost. The pseudo-boehmite prepared by the technology has good peptization property, fast peptization speed, high peptization rate, low peptization viscosity, concentrated product pore diameter distribution, good caking property and wide application in oil refining, petroleum and chemical industries, environmental protection and chemical fertilizer catalytic agent manufacture.

The application relates to a method for producing boehmite by using washing liquor from the production of washing red mud by alumina, which comprises the following steps: delivering washing liquor from the production of the washing red mud by alumina to a desilicication tank, and adding red mud and lime to perform desilicication; when a desilicication index is more than or equal to 400 as required, filtering the product of the desilicication, transferring filtrate to a diluting tank for cooling, cooling to 20 to 60 DEG C, performing carbonation gelatinizing by using 20 to 60 volume percent CO2 gas obtained by concentrating and enriching CO2 waste gas generated in the production of alumina as a precipitator; heating the gelatinized slurry to 70 to 100 DEG C, keeping the temperature for 1 to 6 hour and aging; and washing the aged slurry with washing equipment, filtering the aged slurry to obtain filtrate and filter cake, and drying the filter cake by using drying equipment to obtain powdery boehmite. The method has the advantages of low production raw material cost and rich raw material source, is favorable for alumina production liquid balance, improvement on finished alumina yield, reduction of Al2O3 content of red mud discharged to the outside and recovery of alumina CO2 waste gas and is in accordance with the national circulating economy and waste recycling principle. The product produced has high crystalline phase purity and high peptizing performance and can be used as a binder, a drier, a purifier, a catalyst, a catalyst carrier and the like.

The invention discloses a preparation method of pseudo-boehmite. The method comprises preparing aluminum hydroxide precipitation, aging, washing, and drying, wherein the aging is carried out in the following container: a filter cloth is arranged in the container along the axial direction, so that the aging container is divided into a sandwich area and a central area, and the central area is arranged There is a stirrer, and the negative and positive electrodes that generate the electric field are placed oppositely in the interlayer area, and the aging conditions are controlled. The method can improve the performance of the pseudo-boehmite and reduce the water consumption in the subsequent washing process.

The invention discloses a hydrogenation catalyst and a preparation method thereof. The catalyst preparation method first prepares a wet filter cake material, then mixes it with an industrial pseudo-boehmite raw material, adds an extrusion aid and kneads it, and then it is dried and roasted to obtain hydrogenation Catalyst carrier; after further supporting active metal components, drying and calcining to obtain a hydrogenation catalyst. The hydrogenation catalyst prepared by the method of the invention has good mechanical properties, high strength and good wear resistance, and is especially suitable for the fluidized bed hydrogenation process. The preparation method of the hydrogenation catalyst has simple process and low energy consumption, and is suitable for large-scale production of the fluidized bed catalyst.

The invention relates to a strip desulfurizing agent and a preparation method thereof. The preparation method comprises the following steps: respectively determining the water content of all raw material powder, comparing the water content and adjusting the water contents of the all the raw material powder within the optimal range of the water content; respectively determining the bulk density ofall the raw material powder, comparing the bulk density of all the raw material powder and adjusting the bulk density of all the raw material powder within the corresponding optimal range of the bulkdensity of all the raw material powder; according to the ratio of the raw materials of the strip desulfurizing agent, mixing all the raw material powder, milling the mixed raw material powder and extruding the milled raw material powder into strips, and then sequentially drying and roasting the strips, so as to obtain a finished product strip desulfurizing agent. According to the preparation method, through the synergism of effects achieved by control on the water content and the bulk density of the raw material powder, the diversity factor of crushing strength of the strip desulfurizing agentproduct is greatly decreased, and the quality of the strip desulfurizing agent product is improved.

The invention discloses a heavy oil hydrocracking catalyst, and a preparation method and applications thereof. According to the heavy oil hydrocracking catalyst, high-silicon aluminium oxide is taken as a carrier; VIII family metals and VIB family metals are taken as active metal ingredients. A preparation method of the high-silicon aluminium oxide carrier comprises following steps: modified clay obtained via high temperature roasting is added into an aluminum-containing alkaline liquor so as to obtain a suspension liquid; the suspension liquid and acidic silica sol are subjected to parallel flow gel forming; an alkaline solution is added for further gel forming; and the high-silicon aluminium oxide carrier is obtained via aging, filtering, and drying. The high-silicon aluminium oxide carrier is excellent in comprehensive performance such as pore structure and acidic properties; the heavy oil hydrocracking catalyst prepared by taking the high-silicon aluminium oxide carrier as a carrier is high in impurity removing rate and heavy oil conversion rate, and long in running period in heavy oil ebullated bed hydrocracking technological process.