36results about How to "Facilitated catalytic cracking" patented technology

The invention provides a method for preparing a catalyst for use in the production of o-phenylphenol. The method prepares the catalyst for use in the production of the o-phenylphenol through processes of carrier pretreatment, immersion, drying and activation, assistant addition, roasting and the like. The catalyst has high activity, selectivity and stability at high temperature.

The invention relates to a preparation method of a mesoporous alumina binder and its application in heavy oil catalytic cracking catalysts. The preparation method of the invention uses the mesoporous alumina molecular sieve as the aluminum source, and adopts the method of acidification and peptization to prepare the mesoporous alumina binder glue. The mesoporous alumina binder prepared by the invention can replace traditional binders and be used in the preparation of heavy oil catalytic cracking catalysts. Moreover, compared with traditional binders, the mesoporous alumina binder prepared by the present invention has a mesoporous channel structure, large specific surface area and large pore volume. Compared with catalysts prepared with traditional binders, catalysts prepared with mesoporous alumina binders have increased conversion of heavy oil and light oil yield, decreased coke yield and heavy oil yield, and have better performance in heavy oil catalytic cracking performance.

The invention provides a biomass iron-containing block mass short-course steel-making method and a biomass iron-containing block mass stainless steel production method and belongs to the technical field of ferrous metallurgy. The steel-making method comprises the following steps: step I, producing direct reduction iron: iron-containing block masses are placed in a high-temperature container to be heated, and a ferric oxide is reduced to generate direct reduction iron; and step II, smelting in an electric furnace: direct reduction iron is hot-charged and fed into the electric surface, a slag former is added into the electric furnace, and steel is discharged after oxygen blowing smelting. The biomass iron-containing block mass stainless steel production method is characterized in that molten steel is added into an AOD furnace to be decarbonized and heated, a chromium-containing metal raw material is added into the furnace for alloying, and molten steel is conveyed into a VOD furnace for deep decarbonization to obtain stainless steel. The iron-containing block masses are reduced to generate direct reduction iron, and direct reduction iron is hot-charged and fed into the electric furnace to be smelted to obtain qualified molten steel, so that short-course steel-making of the biomass iron-containing block masses is realized, and the energy utilization efficiency is improved; and stainless steel can be further produced through smelting.

The invention discloses a mesopore-rich Y molecular sieve and a preparation method thereof, wherein the unit cell parameters of the molecular sieve is 24.35-24.55 angstrom, the relative crystallinityis more than or equal to 90%, the Al distribution parameter D of the molecular sieve is more than or equal to 0.3 and is less than or equal to 0.8, the micropore specific surface area of the molecularsieve is 650-800 m<2> / g, the volume of the mesopores of the molecular sieve accounts for 20-65% of the total pore volume, a ratio of the peak area of the resonance signal with the chemical shift of 60+ / -2 ppm to the peak area of the resonance signal with the chemical shift of 55+ / -2 ppm in the 27Al MAS NMR spectrum of the molecular sieve is (1.5-5):1, and the peak area of the resonance signal with the chemical shift of 0+ / -2 ppm accounts for not more than 5% of the total peak area. According to the present invention, the catalyst prepared by using the mesopore-rich Y molecular sieve as the active component has advantages of excellent heavy oil conversion capability, high gasoline yield and high liquefied gas yield in the catalytic cracking of heavy oil.

The invention discloses a preparation method of beta molecular sieve. Step 1, synthesizing initial gel: mix silicon source, aluminum source, alkaline metal source, water, stir evenly, and synthesize initial gel; silicon source is SiO 2 In terms of aluminum source as Al 2 o 3 In terms of alkaline metal sources as Na 2 In terms of O, the molar ratio of raw materials for synthesizing the initial gel is: SiO 2 / Al 2 o 3 =30~150:1, Na 2 O / SiO 2 =0.03~0.35:1, H 2 O / SiO 2 =3.0~50.0:1; step 2, microwave treatment of the initial gel: add β molecular sieve seed crystals to the initial gel prepared in step 1, the ratio of silicon to aluminum to SiO 2 / Al 2 o 3 =20~100:1, the amount added is calculated as SiO by mass 2 3% to 25% of the mass, mixed evenly and heated with microwaves to obtain a crystallized precursor gel; step 3, crystallization reaction: crystallize the crystallized precursor gel obtained in step 2 with microwave heating Reaction, the reaction temperature is 140°C-180°C, the reaction time is 4-20h, and the β molecular sieve product is obtained. The molecular sieve obtained by the method of the invention has small particle size, rich pore structure, and relatively unobstructed channels, which is beneficial to promoting catalytic cracking and isomerization.

The invention provides a suspension bed hydrogenation process for processing heavy oil. In the process, part of raw oil and a suspension bed hydrocracking catalyst are mixed to form a mixture, the mixture is then subjected to primary shearing and secondary shearing sequentially, and thus high-dispersion mixing of the catalyst and the raw oil can be carried out to obtain catalyst slurry, hydrogenation catalytic activity of the catalyst works well to facilitate increase of raw oil conversion rate and light oil yield; the catalyst slurry, the residual raw oil and hydrogen are mixed and then sentinto a suspension bed hydrogenation reactor, suspension bed hydrogenation products are obtained by controlling suspension bed hydrogenation conditions; a reasonable separating process is utilized according to composition and property of the product, and thus, hydrogenation load of a fixed bed is reduced greatly, yield and quality of light oil are improved to the utmost extent, and above all, service life of the fixed bed catalyst can be prolonged effectively, and energy saving and emission reducing of the whole process are facilitated.

The invention discloses a method for preparing ultra-clean graphene by utilizing copper acetate. The method comprises the following steps: sequentially putting the copper acetate and copper substrates at intervals in directions of an air path from upstream to downstream; introducing hydrogen for chemical gas phase deposition; obtaining the ultra-clean graphene after deposition is completed, wherein temperature of a temperature zone in which the copper acetate is located is volatilization temperature of the copper acetate. The preparation method is simple, raw materials are easy to get, the cleanliness of the graphene is superior to a result obtained by growth of methane, so that a single layer of graphene film with ultra-cleanliness and high quality can be obtained; moreover, the graphene film has great application prospects in the fields of optics, electricity and the like.

The invention belongs to the technical field of iron smelting and discloses a biomass gasification and directly-reduced iron co-production method and additives for the same. The method includes: subjecting iron-containing raw materials, biomass, the additives and a binding agent to mixed agglomeration to obtain iron-containing agglomerates; heating the iron-containing agglomerates in a high-temperature container, so that the biomass is gasified to generate combustible gas, and iron oxides are reduced to generate directly-reduced iron, wherein the additives include sodium carbonate, laterite-nickel ore, dolomite and plant ash. By the additives, thermal stability of the biomass and decomposed products thereof are reduced; the biomass serves as an iron oxide reducing agent and a C source and an H source of the combustible gas, the iron oxides serve as an iron source for steel preparation and an oxygen source in carbon reaction for CO generation, and accordingly catalytic cracking of tar and the biomass and the decomposed products thereof is promoted, and the metallization ratio of the directly-reduced iron is increased while biomass gasification yield is increased.

The invention relates to a biomass iron-containing agglomerate for producing combustible gas and DRI, and a preparation method thereof, belonging to the technical field of iron making. The iron-containing agglomerate of the invention comprises, by mass, 50-60 parts of biomass, 100-200 parts of an iron-containing raw material, 5-10 parts of additives and 3-5 parts of a binder, wherein the additivescomprise sodium carbonate, laterite nickel ore, dolomite and plant ash. The iron-containing agglomerate of the invention reduces the thermal stability of the biomass and its decomposition products; the biomass acts as a reducing agent for iron oxide and a C source and an H source for combustible gas; the iron oxide acts as an iron source for steel preparation and an oxygen source for production of CO through reactions of carbon; so the iron-containing agglomerate promotes the catalytic cracking of tar and the biomass and its decomposition products, improves the gasification yield biomass andincreases the metallization rate of DRI.

The invention discloses a catalytic cracking catalyst as well as a preparation method and an application thereof. The catalyst takes kaolin or montmorillonoid as a carrier and takes molybdenum naphthenate and / or iron naphthenate as an active component. The preparation method comprises steps as follows: kaolin or montmorillonoid raw powder is added to a reactor after being calcined at the high temperature, a diluted acid impregnation liquid of molybdenum naphthenate and / or iron naphthenate is added for impregnation, a reacted material is dried, and the catalytic cracking catalyst is prepared. The catalytic cracking catalyst can be applied to a process for treating cellulose and waste plastic, the total conversion rate of cellulose and waste plastic is increased, a target reaction is promoted, and the liquid yield is increased.

A low-rank fuel low-temperature gasification device based on screw pyrolyzers and a fluidized bed gasifier belongs to the field of gasification of low-rank fuels. The power output shaft of a motor 1 is connected with the power input shaft of a transmission gearbox in a transmission mode, a first-order screw pyrolyzer is mutually coupled with a gas lock device through a transmission gearbox, the screw shaft of the first-order screw pyrolyzer is connected with the screw shaft of a second-order screw pyrolyzer through a shaft coupling, and the second-order screw pyrolyzer communicates with the fluidized bed gasifier; the upper part of the second-order screw pyrolyzer is provided with a water vapor inlet; the fluidized bed gasifier communicates with a cyclone separator, the fluidized bed gasifier communicates with a gas inlet system, and a residue discharging tube communicates with the bottom of the fluidized bed gasifier; and the cyclone separator communicates with a first-stage return tube, the first-order return tube communicates with a screw return device, the screw return device communicates with a second-order return tube, and the second-order return tube communicates with the second-order screw pyrolyzer. The in-situ catalytic cracking of parts of tar by pyrolytic coke and the re-adsorbed alkali metal and alkali earth metal catalyzed low-temperature gasification of coal coke are used to realize the high-efficiency low-temperature gasification of the low-rank fuel.

The invention discloses a catalytic cracking catalyst, as well as a preparation method and application thereof. The catalyst adopts kaolin and montmorillonoid as carriers, and adopts molybdenum naphthenate and / or iron naphthenate as an active component. The preparation method comprises the steps of performing high-temperature roasting on kaolin and montmorillonoid raw powder, adding into a reactor, then adding a dilute acid impregnation liquid of iron naphthenate and / or molybdenum naphthenate for impregnating, drying a reacted material, and obtaining the catalytic cracking catalyst. The catalytic cracking catalyst can be applied to cellulose and waste plastic treatment processes, and not only the total conversion rate of cellulose and waste plastic is improved, but also the target responseis promoted, so that the liquid yield is improved.

The invention discloses a gas iron co-production method for preparing a high-strength iron-contained block mass with biomass as an adhesive carrier, and belongs to the technical field of steel iron smelting. According to the preparing method of the iron-contained block mass, iron-contained raw materials, biomass and an addition agent are mixed, and are subject to hot pressing through a briquetting machine to obtain the iron-contained block mass, and the biomass is subject to modification treatment through a modification solution. According to the specific method, the biomass is immersed into the modified solution to be modified, the modified biomass, the iron-contained raw material and the addition agent are mixed and pressurized, the iron-contained block mass is prepared, the mass is heated in a high-temperature container, the biomass is gasified into combustible gas, and an iron oxide is reduced to generate direct reduction iron. The biomass serves as a reduction agent of the iron oxide and a C source and an H source of combustible gas, the iron oxide serves as an iron source and an oxygen source, a bonding agent does not need to be added, the strength of the iron-contained block mass is improved, the biomass gasifying yield is improved, and meanwhile, the metallization rati of iron direct reduction is improved.