Abstract: A silicon-containing alumina support, a process for preparing the support, and a catalyst containing the support are provided. The alumina support includes an additive silicon enriched on its surface, with the difference between the atomic ratio of silicon to aluminum on the surface of alumina support and that of the alumina support is at least 0.10. The process for preparing the silicon-containing alumina support comprises adding a nanometer silicon compound. The inventive alumina support can be used in manufacturing a catalyst for hydrotreating hydrocarbons with good physico-chemical properties and performance.

Abstract: The present invention discloses a process for hydroconverting a heavy hydrocarbon chargestock, wherein said chargestock oil is first contacted with a highly active homogeneous hydrogenation catalyst to effect the hydrogenation reaction so that macromolecular radicals of the residue (the precursor of coke) form as less as possible, thereby decreasing the output of coke in the hydrocracking of the residue; when the reaction proceeds to a certain extent, a solid powder is added to adsorb the macromolecular radicals of the residue formed during the reaction and lower their reaction activity, thereby preventing them from further condensing to coke and/or depositing due to polymerization. The synergetic action of the two sorts of substances makes it possible to produce substantively no coke or less coke during the hydrogenation of residue in a suspension bed and prolong the operation lifetime of the unit.

Abstract: An acidic amorphous silica-alumina having large specific surface area and a large pore volume, a carrier complex and a hydrotreating catalyst containing said acidic amorphous silica-alumina, in particular a hydrocracking catalyst containing said acidic amorphous silica-alumina in combination with a modified zeolite-Y for treating petroleum hydrocarbon materials to produce middle distillates, and processes for the preparation thereof. Said 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 according to the present invention shows a relatively high activity and mid-distillate selectivity and can be particularly used in hydrocracking process for producing mid-distillates in a higher yield.

Abstract: This invention relates to a copper-containing catalyst, a process for the preparation thereof and uses of the catalyst. The catalyst includes copper oxide of 30-70 wt %, zinc oxide of 30-70 wt %, alumina of 0-30 wt % and no sodium, and has a specific surface area of 30-50 m2/g, a pore volume of 0.10-0.25 ml/g, and an average pore diameter of 10-25 nm and has a uniform crystallite distribution wherein the crystallites having a diameter of less than 1.0 nm account for 0-10%, thoseof 1.0-2.0 nm account for 80-95%, and those of more than 2.0 nm account for 0-10%. The process includes a co-precipitation method using an organic acid and/or an ammonium salt thereof as precipitant to provide a copper-containing catalyst having a relatively large specific surface area and pore volume, and a uniform crystallite distribution.

Abstract: The present invention relates to a highly active midbarrel hydrocracking catalyst and a process for the preparation thereof. The support of the catalyst comprises a modified zeolite-Y, a modified zeolite-&bgr;, alumina, etc. The composite of the modified zeolite-Y and zeolite-&bgr; exhibits a good synergistically catalytic effect. The catalyst prepared by supporting Group VIB and/or Group VIII metal components is useful in the hydrocacking of heavy oils with high content of sulfur and nitrogen to produce high quality middle distillates with maximum output. The activity of and selectivity to middle distillates of the catalyst are remarkably raised simultaneously. Moreover, the solidifying point of the produced diesel is remarkably lowered.

Abstract: This invention discloses a single-stage process for producing diesel oils of superior quality and low solidifying point from fraction oils under controlled reaction conditions, comprising a hydrorefining step, optionally a hydroupgrading step and a hydrodewaxing step combined in series. The process of the invention is simplified, the operation is simple, the adaptability to feedstocks is good, and the quality of diesel oil product is improved, and when the hydroupgrading step is comprised, the cetane number of the product is further boosted. A hydrorefining catalyst having a higher content of NiO and good anti-coking performance and a hydroupgrading catalyst and hydrodewaxing catalyst having an adequate acidity and strong resistance to NH3 and H2S respectively are preferably used in the present invention to achieve better results.

Abstract: 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.

Abstract: The present invention relates to an aqueous phase process for purifying long-chain dicarboxylic acids from a liquid containing a long-chain dicarboxylic acid/or a salt thereof. The invention overcomes the disadvantages of low purity and high chroma of the product obtained by using the aqueous phase process of the prior art. Through the step of crystallizing the monosalt of long-chain dicarboxylic acid, the present process reduces effectively the content of such impurities as proteins and coloring materials in the product and obtains the long-chain dicarboxylic acid product having a total acid content of greater than 99 wt % and exhibiting a white appearance.

Abstract: A catalyst for hydrodemetalization of heavy oil, especially residuum oil, and a process for preparing the same, wherein said catalyst comprises the metal elements of Groups VIII and/or VIB as active components supported on an alumina carrier having large pores. The total pore volume of said carrier is in the range of 0.80˜1.20 ml/g (by mercury porosimetry method), the specific surface area in the range of 110˜200 m2/g, the peak pore diameter in the range of 15˜20 nm, and the bulk density in the range of 0.50˜0.60 g/ml. In the process of the invention, a physical pore-enlarging agent and a chemical pore-enlarging agent are added simultaneously during the mixing of the pseudoboehmite to a plastic mass, then extruding, drying, calcining, the carrier is obtained, then impregnating with active components by spraying onto the carrier, after drying and calcining, the catalyst is obtained.

Abstract: This invention discloses a dispersing-type catalyst for catalytic hydrocring of heavy oil and residuum, the preparation method thereof and a suspension bed hydrocracking process for hydrocracking of heavy oil and residuum using said catalyst. Said catalyst comprises 2 to 15 wt % Mo, 0.1 to 2 wt % Ni and 0.1-3 wt % P. The preparation method comprises dissolving oxides or salts of metals such as Mo, Ni in water. The process comprises mixing the heavy oil and residuum feedstock with the catalyst, heating the mixture and introducing the mixture into a suspension bed reactor, performing the hydrocracking reaction at 380-460.degree. C. under 10-15 MPa of hydrogen pressure, in which the catalyst is added in an amount to provide 150-150O ppm active metals. The yield of light oil according to the process is more than 70 wt %, substantially without coking.

Abstract: This invention discloses a dispersing-type catalyst for catalytic hydrocracking of heavy oil and residuum, the preparation method thereof and a suspension bed hydrocracking process for hydrocracking of heavy oil and residuum using said catalyst. Said catalyst comprises 2 to 15 wt % Mo, 0.1 to 2 wt % Ni and 0.1-3 wt % P. The preparation method comprises dissolving oxides or salts of metals such as Mo, Ni in water. The process comprises mixing the heavy oil and residuum feedstock with the catalyst, heating the mixture and introducing the mixture into a suspension bed reactor, performing the hydrocracking reaction at 380-460.degree. C. under 10-15 MPa of hydrogen pressure, in which the catalyst is added in an amount to provide 150-1500 ppm active metals. The yield of light oil according to the process is more than 70 wt %, substantially without coking.

Abstract: Disclosed is a hydrogenation demetalization catalyst with a stabilized alkali metal, havinga). an alumina carrier,b). 0.01-10.2% by weight of an alkali metal,c). 0-3.0% by weight of a Group VIB element, andd). 0-3.0% by weight of a Group VIII element of the periodic table of elements,with a pore volume of 0.4-1.3 ml/g, a surface area of 100-230 m.sup.2 /g, comprising a nonmetallic element selected from the group consisting of P, Si, B and F with the atomic ratio of said nonmetallic element to said alkali metal being 0.5-40.0. Also disclosed is a process for preparing the same.

Abstract: A process for preparing diarylamines in high yield, in which diarylamines are prepared from arylamines in the presence of a solid acid catalyst. The solid acid catalyst with good stability and regeneration ability consists of H-type beta zeolite and active alumina, the ratio of SiO.sub.2 /Al.sub.2 O.sub.3 in the zeolite is 20.about.100, and the content of active alumina is 10%.about.70% (wt).