302 results about "Amorphous silica-alumina" patented technology

Disclosed is a process for making middle distillate and lower olefins. The process includes catalytically cracking a gas oil feedstock within a riser reactor zone by contacting under suitable catalytic cracking conditions within the riser reactor zone the gas oil feedstock with a middle distillate selective cracking catalyst that comprises amorphous silica alumina and a zeolite to yield a cracked gas oil product and a spent cracking catalyst. The spent cracking catalyst is regenerated to yield a regenerated cracking catalyst. Within an intermediate cracking reactor such as a dense bed reactor zone and under suitable high severity cracking conditions a gasoline feedstock is contacted with the regenerated cracking catalyst to yield a cracked gasoline product and a used regenerated cracking catalyst. The used regenerated cracking catalyst is utilized as the middle distillate selective catalyst.

The invention discloses a preparation method of a hydrogenation catalyst. The final catalyst is prepared by impregnation method or coprecipitation method using a carrier material containing molecular sieve and amorphous silica-alumina. The carrier material is prepared by introducing molecular sieve slurry in the process of forming amorphous silica-alumina gel, which improves the distribution of molecular sieve in the silica-alumina carrier, improves the coordinated catalytic effect of the two carrier materials, and greatly improves the performance of the catalyst. The catalyst prepared by the method of the present invention can be used in various hydrogenation processes.

An acidic amorphous silica-amumina has a large specific surface area and a large pore volume. A carrier complex and a hydrotreating catalyst containing acidic amorphous silica-alumina, in particular a hydrocracking catalyst containing acidic amorphous silica-alumina in combination with a modified zeolite-Y, treats petroleum hydrocarbon materials to produce middle distillates. The amorphous silica-alumina has a SiO2 content of 10-50 wt. %, a specific surface area of 300-600 m2/g, a pore volume of 0.8-1.5 ml/g and an IR acidity of 0.25-0.60 mmol/g. The catalyst shows a relatively high activity and mid-distillate selectivity and can be particularly used in hydrocracking process for producing mid-distillates with a higher yield.

A process for preparing the amorphous Si-Al material by the carbonizing method includes such steps as adding part of sodium silicate solution to sodium aluminate solution, introducing CO2 gas to it for a certain time, adding the rest of sodium silicate solution while reacting, stabilizing, filtering, washing and drying. It can be used as the carrier of catalyst.

The invention discloses a hydrocracking catalyst carrier and a preparation method thereof. The catalyst carrier comprises a modified Y-type molecular sieve, amorphous silica-alumina and alumina, wherein the modified Y-type molecular sieve is Y-type molecular sieve treated by mixed aqueous solution of an aluminum salt and an acid and by hydrothermal process. In the carrier, the modified Y-type molecular sieve has a high crystallinity, high silicon to aluminum ratio and proper total acidity and acid distribution and can form an acid component with the amorphous silica-alumina. Therefore, the carrier is particularly suitable for serving as a hydrocracking catalyst carrier to improve the activity of a hydrocracking catalyst and the selectivity of middle distillates.

A catalyst composition comprising a minor amount of a low acidity, highly dealuminated ultra stable Y zeolite having an Alpha value of less than about 5, preferable less than about 3 and Broensted acidity measured by FT-IR from about 1 to about 20, preferably from about 1-10, micro mole/g of, a homogeneous, amorphous silica-alumina cracking component having an SB ratio of from about 0.7 to about 1.3, wherein a crystalline alumina phase is present in an amount of no greater than about 10%, preferably no greater than 5% and a catalytic amount of hydrogenation component selected from the group consisting of a Group VI metal, a Group VIII metal, and mixtures thereof is disclosed. The present invention provides for a process for converting hydrocarbonaceous oils comprising contacting the hydrocarbonaceous oils with the catalyst under suitable hydrocarbon conversion conditions. Such processes in include, but are not limited to, single stage hydrocracking, two-stage hydrocracking, series-flow hydrocracking, mild hydrocracking, lube hydrocracking, hydrotreating, lube hydrofinishing, hydrodesulphurization, hydrodenitrification, catalytic dewaxing and catalytic cracking.

The invention discloses a hydrogenation catalyst and a preparation method thereof. The catalyst comprises hydrogenation active metal components and a carrier consisting of the small crystal grain Y-shaped molecular sieve, amorphous silica-alumina and aluminum oxide, wherein the small crystal grain Y-shaped molecular sieve is a small crystal grain Y-shaped molecular sieve subjected to hydro-thermal treatment. The hydrocracking catalyst provided by the invention has the characteristics of high catalyst activity, excellent target product selectivity, great preparation flexibility, and the like, thus the catalyst can be used for preparing products such as heavy naphtha, aviation kerosene, diesel oil and the like with high yield and good product quality.

Process for producing paraffinic hydrocarbons, the process comprising the following steps: (a) contacting hydrogen and a feedstock comprising triglycerides, diglycerides, monoglycerides and/or fatty acids with a hydrogenation catalyst under hydro-deoxygenation conditions; and (b) contacting the whole effluent of step (a) with a hydroprocessing catalyst comprising sulphided Ni and sulphided W or Mo as hydrogenation components on a carrier comprising amorphous silica-alumina and/or a zeolitic compound under hydro-isomerisation conditions.

The invention discloses a high-activity amorphous silica-alumina, a hydrocracking catalyst supported by amorphous silica-alumina, and preparation methods thereof. The preparation method of the amorphous silica-alumina supporter comprises the following steps: preparing a silicon source-aluminum source mixed water solution, mixing the mixed water solution with a precipitant solution, carrying out cocurrent flow coprecipitation to obtain a precipitated slurry, transferring the slurry into a closed vessel, aging, molding, and roasting. The invention also provides a preparation method of a hydrocracking catalyst by using the amorphous silica-alumina as the supporter. The preparation method of the hydrocracking catalyst is as follows: in the preparation method of the amorphous silica-alumina supporter, a nickel salt or nickel salt and metal aid M salt is/are added into the silicon source-aluminum source mixed water solution in the step (1), and the rest steps are the same as those in the preparation method of the amorphous silica-alumina supporter. The coprecipitation process is adopted in the preparation process, and the silicon source and aluminum source finally exist in the catalyst in the form of the amorphous silica-alumina, but the catalyst has much higher activity than the common amorphous silica-alumina catalyst.

An effective catalyst includes an amorphous silica-alumina support having a bimodal pore size-distribution. The support may be prepared by a method that includes the physical mixing of two silica-alumina gels prepared so as to have two different average pore sizes. The catalyst has the advantage that both metal dispersion on the support and product diffusion in the pores are optimized. Further, the catalyst has improved performance in the production of hydrocarbons from synthesis gas.

The invention relates to a composite mesoporous molecular sieve hydrocracking catalyst and the application thereof. The catalyst composed of following components of 20 to 50 percent of amorphous silica-alumina, 5 to 30 percent of alumina, 10 to 25 percent of adhesives, 10 to 40 percent of Group VIB-the metal oxides, 1 to 20 percent of Group VIII-the metal oxides, 0.1 to 10 percent of Group VA-the metal oxides, and 1 to 40 percent of composite mesoporous molecular sieve, wherein, the composite mesoporous molecular sieve is a composite molecular sieve composed of a mesoporous molecular sieve AlSBA-15 and/or AlSBA-15/Y; the weight ratio of the composite molecular sieve AlSBA-15/Y in the AlSBA-15 and a Y molecular sieve is 9:1 to 1:9; the weight ratio of the mesoporous molecular sieve and a pore molecular sieve is 3:1 to 1:3, the silica alumina ratio is 10:1 to 40:1, and the silica alumina ratio of the Y molecular sieve is 5:1to 20 :1. The catalyst used for hydrocracking for heavy oil shows high activity for hydrocracking and high medium oil selectivity.

The invention discloses a preparation method of a hydrogenation catalyst. According to the catalyst, a cracking molecular sieve, amorphous silica-alumina and alumina are used as carriers, and VIII and VIB metals are used as hydrogenation active components. The preparation process comprises the following steps of: mixing the cracking molecular sieve, amorphous silica-alumina and alumina for molding, drying, loading the active metals by an immersion method, drying and roasting to obtain the catalyst. In comparison with the routine immersion method, the method provided by the invention can be used to prepare the molded carriers without roasting, simplify time and energy, minimize strong interaction, help uniform distribution of the metals as well as performance of the metal activity, and avoid specific surface area loss caused by multi-step roasting. The catalyst prepared by the method is especially applicable to be used as a hydrogenation catalyst for high-yield high-quality heavy naphtha, aviation kerosene and diesel oil. By the adoption of the preparation method, activity and selectivity of the catalyst are raised.

The process and apparatus converts ethylene in a dilute ethylene stream that may be derived from an FCC product to heavier hydrocarbons. The catalyst may be an amorphous silica-alumina base with a Group VIII and/or VIB metal. The catalyst is resistant to feed impurities such as hydrogen sulfide, carbon oxides, hydrogen and ammonia. At least 40 wt-% of the ethylene in the dilute ethylene stream can be converted to heavier hydrocarbons.

The preparation method of hydrocracking catalyst containing rare earth includes the following steps: mixing molecular sieve, alumina precursor and/or amorphous silica-alumina and rare earth salt according to the required propertion, and is necessary, adding peptizator, kneading or extruding-forming, drying and roasting to obtain formed catalyst carrier, then loading the hydrogenated metal active component on the formed catalyst carrier. The adoption of said invention method can make the rare earth content of catalyst reach to the required level by one-step operation, at the same time its operation is simple.

The invention discloses a method for preparing a selective hydrogenation ring-opening catalyst for aromatic hydrocarbons with double rings or more. The method is characterized in that the selective hydrogenation ring-opening catalyst for aromatic hydrocarbons with double rings or more is prepared from a carrier, active ingredients and aids, wherein the carrier is prepared from alumina, amorphous silica-alumina, a modified small grain Beta-type molecular sieve and an SPAO-5/ZSM-5 composite molecular sieve; the active ingredients at least include an oxide of Mo or W and at least include an oxide of Co or Ni; and the aids refer to one or two out of F and P. The invention also relates to a preparation method of the catalyst and a method for synthesizing the SPAO-5/ZSM-5 composite molecular sieve. The catalyst is effectively matched with a hydrogenation active center, an isomerization active center and a cracking active center, so that the catalyst has excellent aromatic hydrocarbon hydrogenation ring-opening selectivity in the hydrogenation process of low-quality distillate oil enriched in aromatic hydrocarbons with double rings or more.

The invention discloses a carrier material containing a molecular sieve and amorphous silica-alumina and a preparation method thereof. The preparation method is characterized in that in NaY molecular sieve modification, before final hydrothermal treatment, amorphous silica-alumina slurry and a surfactant are introduced so that the molecular sieve and the amorphous silica-alumina are dispersed uniformly and molecular sieve agglomeration or channel blocking is avoided, and thus a specific surface area and a pore volume of the carrier material are improved and catalyst performances are improved. The carrier material is especially suitable for being used as a carrier component of a hydrocracking catalyst.

A process for production of very high-quality base oils, and simultaneous production of high-quality middle distillates, comprises the successive stages of hydroisomerization and catalytic dewaxing. The hydroisomerization takes place in the presence of a catalyst containing at least one noble metal deposited on an amorphous acid support, the metal dispersion being less than 20%. The support is preferably an amorphous silica-alumina. The catalytic dewaxing takes place in the presence of a catalyst containing at least one hydrodehydrogenating element (Group VIII) and at least one molecular sieve chosen from ZBM-30, EU-2, and EU-11.

The present invention relates to a rare earth-containing diesel fuel distillate oil hydrogenation catalyst, preparation and an application thereof. The catalyst comprises 5-60 wt% of a rare earth-modified USY molecular sieve, 5-80 wt% of amorphous silica-alumina, 0.1-10 wt% of a hydrogenation active component and the balance of macroporous alumina, wherein the hydrogenation active component is a group VIII metal. The catalyst has excellent activities such as hydrogenation, isomerizing, and selective aromatic hydrocarbon ring opening. When the catalyst is adopted to treat FCC hydrorefining diesel fuel distillate oil, under relatively mild reaction conditions, cetane number can be significantly increased, a freezing point can be reduced, product quality can be increased, and the diesel fuel yield can be maintained to more than 95%. In addition, with addition of rare earth elements, activity and a service life of the catalyst are increased, and the catalyst is particularly suitable for deep hydrogenation saturation of the aromatic hydrocarbon in the second stage in the diesel fuel two-stage hydrogenation modification so as to selectively open the ring.

The invention relates to a method for catalyzing diesel oil to realize hydrogenation dearomatization. The method comprises the following steps that: distillation range of catalyzing diesel oil feeding is at a temperature of between 150 and 380 DEG C; in the presence of hydrogen, a reaction is carried out, the reaction temperature is between 330 and 370 DEG C, the hydrogen partial pressure is between 6 and 9 MPa, the hydrogen-oil volume ratio is between 500:1 and 1,000:1 and the liquid hourly volume space velocity is between 1.0 and 2.0 hr-1; the compositions in percentage by weight of a catalyst are: 15 to 40 percent of amorphous silica alumina, 5 to 30 percent of aluminum oxide, 10 to 40 percent of VIB group metal oxide, 1 to 15 percent of VIII group metal oxide and 5 to 30 percent of Beta/Y molecular sieve; moreover, the total weight of the compositions is counted as 100 percent. The method has the advantages that: diesel oil yield is more than 97 weight percent, and the dearomatization rate of diesel oil reaches to above 60 percent; meanwhile, total desulfurization rate and total denitrification rate reach above 98.5 percent, and product density is reduced by above 0.0400g/cm3.

The invention relates to a method of producing middle distillate oil through hydrocracking. A distillation range of raw materials is between 250-570 DEG C; a nitrogen content is 0.1-2000 [mu]g/g; and a catalyst is composed of 20-65 % of amorphous silica-alumina, 8-25 % of macroporous alumina, 8-25 % of an adhesive, 4-40 % of a composite molecular sieve, 1.5-5 % of an extrusion aid, 12-30 % of VIB-group metal oxides, 3-10 % of VIII-group metal oxides, and 0.1-5 % of VA-group metal oxides, wherein the composite molecular sieve is composed of an AlSBA-15/Y mediated-microporous composite molecular sieve and a [beta]microporous molecular sieve. The catalyst is relatively high in catalytic activity and middle distillate oil selectivity, and can be used to produce heavy naphtha, jet fuel, diesel oil, tail oil, etc.; and the produced products are good in quality.

The invention relates to a catalyst used in a reaction for producing ethylene by ethanol dehydration, which is characterized in that the catalyst of the invention consists of HZSM-5, in which the ratio of the 0.5 to 7 percent of one or a plurality of kinds of active metallic components by weight to the 5 to 30 percent of amorphous silica-alumina gel and skeleton silica-alumina by weight is 5 to 300. In the reaction implemented in a fixed bed fluid reactor, the catalyst of the invention can achieve high conversion rate and high selectivity for converting ethanol to ethylene under the conditions of normal pressure, reaction temperature of 200 to 290 DEG C and reactant airspeed of 0.1-10h<-1>, and with 10 to 100 percent of the ethanol water solution as raw reaction materials. Under optimized conditions, the ethanol conversion rate, the vapor ethylene selectivity and the overall ethylene yield all approximate 100 percent. The catalyst of the invention is used for the reaction for producing ethylene by ethanol dehydration, and has the outstanding features of wide concentration range of the raw reaction material solution, lower reaction temperature and wider airspeed range, does not need the preliminary gasification of the raw reaction material solution, does not use the inert diluent gas, and has high catalyst activity and selectivity as well as long catalytic life.