823results about How to "Improve hydrogenation activity" patented technology

The invention relates to a palladium-silver bimetallic hydrogenation catalyst, a carrier of which mainly contains Al2O3 and which is characterized by comprising, based on 100% of the catalyst weight, 0.01-0.4% of Pd, 0.02-0.2% of Ag, and has a specific surface area of 1-100m<2>/g. The catalyst is obtained through three steps of: first, preparing a functionalized-high-molecular / Al2O3 precursor, then preparing a Pd-Ag-high-molecular / Al2O3 precursor, and lastly roasting the precursors at 380-550 DEG C for 2-6h. The preparation method overcomes the influences of dipping liquid surface tensionand solvation effect on palladium-silver disperseness, and the prepared catalyst has excellent selectivity. The catalyst of the invention can be applied to selective hydrogenation process of fractions such as C2 and C3, and has a good hydrogenation activity, excellent selectivity and good hydrogenation stability.

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.

The invention relates to a selective hydrogenation method of high unsaturated hydrocarbons in C4 fractions, which is characterized in that salvage stores which are rich in acetylene hydrocarbon and prepared by extracting butadiene are used as the material, and a fixed bed reactor is adopted to obtain 1, 3-budiene by selective hydrogenation under the existence of a catalyst. The adopted process conditions are as follows: the reaction temperature is between 30 DEG C and 90 DEG C, the reaction pressure is between 1.0 MPa and 4.0 MPa and the liquid space velocity is 7 to 20h<-1>. The catalyst is preferably a palladium system catalyst with alumina as a carrier, the specific surface is 50 to 150m<2>/g and the specific pore volume is 0.25 to 1.0ml/g. The method has remarkable good effects on reducing waste of resources and improving economic benefits by effectively utilizing the salvage stores rich in acetylene hydrocarbon and prepared by extracting butadiene.

The present invention provides an improved process for the hydrogenation of 3-hydroxypropanal to 1,3-propanediol which comprises purifying an aqueous solution of 3-hydroxypropanal by contacting said aqueous solution with a purifying agent prior to hydrogenation.

The invention realtes to a nickel based hydrogenation catalyst, preparation and application thereof. Using alumina or and monox silica as carrier, the catalyst prepared by means of coprecipitation, main containing active component Ni, is characterized in catalyst composed by active component Ni, La, adjuvant X1 and carrier X2O. Calculated by weight of component, the catalyst including: NiO 40-70%, La2O3 2-5%, X2O 20-50%, wherein X1 is selected from one or more of Cu, Mg, Zr, X2 is selected from Al or and Si; surface area to volume ratio thereof is 80-200 m<2>/g, pore volume ratio is 0.4-0.8 ml/g. The catalyst is suit for mono olefin hydrogenation, especially for hydrogenation of pyrolysis C9 distillation, which has higher hydrogenation activity, definited sulfur poison resist and carboid resist to fit for higher require of high colloid raw material hydrogenation which of catalyst has high hydrogenation activity and good stability.

Disclosed are a unsupported catalyst for deeply hydrofinishing of intermediate distillate and method for making the same, particularly a catalyst particle with nanometer pore and relatively high specific surface area obtained by urea melt reaction. The most outstanding technical feature of the invention is that by adopting synthesis technique of urea melt reaction, metal is free of loss, prepared metal composite has nanometer pore and relatively high specific surface area, and could provide abundant catalytic hydrogenation activity bits, and the inventive catalyst has much higher catalytic hydrogenation activity comparing with conventional supported catalyst because of this. Meanwhile, the invention is simple in process, easy to operate, fast in reaction, suitable for industrial production.

An improved process for producing very high quality base stock and for simultaneous production of high quality middle distallates, comprising successive hydroisomerisation and catalystic dewaxing steps wherein hydroisomerisation is carried out in the presence of a catalyst containing at least one noble metal deposited on an amorphous acidic support, the dispersion of the metal being less than 20%. The support is preferably an amorphous silica-alumina. Catalytic dewaxing is carried out in the presence of a catalyst containing at least one hydrodehydrogenating element (group VIII) and at least one molecular sieve (preferably zeolite). The sieve is preferable selected from NU-10, EU-1, EU-13, zeolite and ferrierite.

Disclosed is a hydrogenation catalyst using silicon oxide and alumina as the carrying agent and its preparing process, after sintering, the catalyst comprises nickel oxide 1-10 wt%, molybdenum oxide and tungsten oxide with the total content of greater than 10-50 wt%, and balancing carrying agent.

The invention discloses reformate hydrogenation catalyst and the production method thereof. The invention is characterized in that the catalyst consists of a main active component, auxiliary agent, and carriers, the structural formula is Pd-Ma (Mb)/carriers; the main active component is a double noble metal component Pd, and the content is 0.01 to 0.5 wt percent; Ma is one of Au, Ag, Pt, Rh, and Ir, and the content is 0.01 to 0.5 wt percent; Mb is one of Sn, Pb, Sb, and Bi, and the content is 0.2 to 1.0 wt percent; the rest are carriers; inorganic acid or organic acid is taken as competitive adsorption auxiliary agent to achieve that the active component presents the distribution of an eggshell-shaped shallow layer, the active metal and the auxiliary agent are loaded by a distribution impregnation method or a co-impregnation method, and then the hydrogenation catalyst is produced through drying and roasting.

The invention relates to a selective hydrodesulfurization catalyst contains cobalt and molybdenum as active components. The selective hydrodesulfurization catalyst is characterized in that silicon oxide and aluminum oxide are used as carriers of the catalyst; based on the total weight of 100%, the catalyst comprises 2-6wt% of cobalt oxide, 9-15 wt% of molybdenum oxide, 2-8wt% of alkaline earth metal oxide, 2-6wt% of phosphorus oxide, 3-5wt% of alkali metal oxide, 2-6wt% of silicon oxide and 54-80 wt% of aluminum oxide; and the catalyst has the specific surface area of 200-300m<2>/g and the pore volume of 0.5-0.7mL/g. The catalyst has high hydrogenation activity and selectivity, good stability, low research octane number loss and high liquid yield. The catalyst is suitable for selective hydrodesulfrization of low-quality gasoline and is particularly suitable for selective hydrodesulfrization of low-quality FCC (Family Car China) gasoline.

A hydrotreating catalyst of inferior diesel consists of alumina 20.0í½80.0wt% and molecular sieve 3.0í½60.0w%. The catalyst is prepared by loading at least one Fe, Co and Ni metal of ó° family and MO and W metal of ó÷B family as metal active component and adding one or above oxide or fluorinated compound of titanium, magnesium, zirconium, lanthanum, iron, phosphorus, silicon and boron as active auxiliaries. It can decrease content of sulfur and arenes and increase cetyl value in products. It can be used for cryogenic hydrogenation desulfurization, denitridation and hydrogenation dearomatization.

The invention discloses a hydrofining catalyst and a preparation method thereof, belonging to the field of catalysts used in the petroleum-chemical industry. The hydrofining catalyst disclosed herein comprises a carrier, an active component and an auxiliary agent, wherein the carrier is Ti-modified gamma-alumina, the active component comprises oxides of Mo, Co and Ni, and the auxiliary agent comprises oxides of rare earth. The catalyst is characterized in that: based on 100% of the total weight of the catalyst, Co (measured in CaO) in the active component accounts for 2.0-7.5% of the total weight of the catalyst, Mo (measured in MoO3) in the active component accounts for 4.0-18.0% of the total weight of the catalyst, Ni (measured in NiO) in the active component accounts for 0.2-5.0% of the total weight of the catalyst, the auxiliary agent accounts for 0.05-1.0% of the total weight of the catalyst, and the balance consists of the carrier. According to the invention, the catalyst prepared by the formula and the method disclosed in the invention can carry out hydrogenation on saturated monoolefine while the catalyst is used for carrying out hydrodesulfurization on oils, can be suitable for technical requirements of heavy oriention, changeable sulphur content, and high air speed of hydrogenation liquid for pyrolysis gasoline two-stage hydrogenated raw materials, and simultaneously, the catalyst has the advantages of low activation temperature and low loss of aromatics in the hydrogenation process.

The invention relates to a hydrogenation catalyst with active metal component concentration in gradient increase and distribution and a preparation method thereof. The preparation method comprises the following steps of: mixing compounds of metal in VIB and/or VIII family with deionized water or ammonia to prepare a metal impregnating solution by using Al2O3 or Al2O3 containing SiO2, TiO2 and ZrO2 as a vector; preparing the hydrogenation catalyst by using a saturated impregnation method; gradually adding denser metal solution for saturated impregnation of the vector by preparing more dilute solutions of metal in VIB and/or VIII family or deionized water; or impregnating the vector first with the metal impregnating solution with low concentration and then with the metal impregnating solution with high concentration by preparing metal solutions of different concentrations; drying for 1 to 8 hours at 80 DEG C to 150 DEG C; and baking for 2 to 6 hours in an air of 300 DEG C to 650 DEG C. The catalyst has the advantages of high desulfurization, denitrification, residual carbon removing activity and stability, simple preparation and lower preparation cost and is suitable for the field of heavy oil hydrogenation.

The invention concerns a process for producing gasoline with an improved octane number, optionally accompanied by oil and/or middle distillate production, by conversion-hydroisomerization of the paraffins in the feed using a catalyst containing at least one noble metal deposited on an amorphous acidic support. Isoparaffins are separated from the gasoline cut obtained, and normal paraffins and possibly monobranched paraffins contained in the resulting effluent are isomerized using a catalyst containing at least one hydrodehydrogenating metal and at least one acidic solid. The ensemble of the streams charged with isoparaffins with an improved octane number is sent to the gasoline pool. The residue undergoes catalytic dewaxing.

A process and catalyst for preparing isooctanol by liquid-phase hydrogenation of the mixture of isooctanal and octylene alcohol is disclosed. Said catalyst is prepared from metallic Ni, alkali-earth metal oxide and/or alumina, and Si-contained compound as carrier through code position of Ni and carrier, kneading, and calcining at 300-800 deg.C. Its advantages are good porous structure, and high strength, hydrogenating activity, and output rate of isooctanol.

The invention provides a hydrogenation catalyst soaking solution composition, which comprises a precursor of a hydrogenation active ingredient, a soaking additive and water, wherein the soaking additive has similar pKa value with that of the precursor of the hydrogenation active ingredient and comprises carbon-carbon double bond and/or carbon-carbon triple bond substances in molecular structure. The invention also provides a method for preparing a hydrogenation catalyst, which comprises: using the soaking solution to soak a catalyst carrier, and drying and roasting the catalyst carrier, wherein the soaking solution is the hydrogenation catalyst soaking solution composition. The hydrogenation catalyst prepared from the hydrogenation catalyst soaking solution composition has higher hydrogenation activity and higher cracking activity at the same reaction temperature compared with a hydrogenation catalyst prepared by the prior art.

The invention relates to an alumina carrier with a composite pore structure and a preparation method thereof. The method mainly solves the technical problem that it is difficult to obtain macroporous alumina carriers with different pore distributions above 20 nanometers and the preparation method thereof in the prior art. In the present invention, the specific surface area of ​​the alumina carrier is 40-160 m2/g, the total pore volume is 0.3-1.2 ml/g, and the pore volume with a pore diameter of less than 30 nanometers accounts for 5-60% of the total pore volume. The pore volume of 30 to 60 nanometers accounts for 20 to 75% of the total pore volume, and the pore volume with a pore diameter > 60 nanometers accounts for 20 to 60% of the total pore volume as a composite carrier; the preparation method of the composite carrier adopts firstly alumina A Mixing with alumina B, molding, drying at 50-100°C for 1-24 hours, and then roasting at 800-1150°C for 1-10 hours to obtain a technical solution to the composite carrier solves this problem well, and can be used for pyrolysis gasoline In the industrial production of hydrogen catalysts.

For producing very high quality base stock and for simultaneously producing high quality middle distillates, successive hydroisomerisation and catalytic dewaxmg steps are employed wherein the hydroisomerisation is carried out in the presence of a catalyst containing at least one noble metal deposited on an amorphous acidic support, the dispersion of the metal being 20%-100%. The support is preferably an amorphous silica-alumina. Catalytic dewaxing is carried out in the presence of a catalyst containing at least one hydrodehydrogenating element (group VIII) and at least one molecular sieve selected from ZBM-30, EU-2 and EU-11.

This is about a kind of catalyst of adding hydrogen of choosing. The catalyst includes a kind of Oxidize the aluminum placer and Gu and/or Ni in ó°, Mu and/or Wu in ó÷ and alkali metal. Its feature is: the catalyst includes 0.5--8% by weight that is chosen Gu and/or Ni in ó°, 2--15% is chosen Mu and/or Wu in ó÷, >2--8% alkali metal. Compared to the current catalyst, the catalyst offend in the invention has much higher choosing ability and activity in adding hydrogen of gasoline.

The invention discloses a load type nickel phosphide catalyst and a pre-phosphating preparation method thereof, belonging to the technical field of petrochemical engineering. The load type nickel phosphide catalyst is prepared by loading nickel salt on a carrier, then pre-phosphating a nickel oxide-loaded catalyst in a reactor, and enabling nickel oxide to be transformed into nickel phosphide in situ. The prepared catalyst is high in load capacity, better in dispersity, higher in purity and good in hydrogenation performance. Meanwhile, the method remarkably simplifies a preparation method of the nickel phosphide catalyst, simplifies preparation steps, reduces preparation cost and has a good application prospect.