摘要:
A process for producing a specific titanium-containing silicon oxide catalyst having a specific average pore diameter, a specific a pore diameter distribution and a specific pore volume per unit weight, which comprises the following first to second steps: first step: a step of obtaining a solid containing a catalyst component and a template by mixing and stirring a silica source, a titanium source and, as the template, the quaternary ammonium ion, wherein an amount of an alkali metal in the mixture prepared is within a range of the following expression (II) or (III), alkali metal/titaniumnull3 (mol/mol) nullnull(II) alkali metal/nullNR1R2R3R4nullnullnull0.3 (mol/mol) nullnull(III); and second step: a step of removing the template from the solid prepared in the first step.
摘要翻译:一种具有比平均孔径,特定孔径分布和每单位重量的比孔体积的特定含钛氧化硅催化剂的制造方法,其包括以下第一至第二步骤:第一步骤:获得 含有催化剂组分和模板的固体,通过混合和搅拌二氧化硅源,钛源和作为模板的季铵离子,其中制备的混合物中碱金属的量在下列表达式的范围内 (II)或(III)中,碱金属/钛<= 3(mol / mol)(II)碱金属/ [NR 1 R 2 R 3 R 4] + = 0.3 (mol / mol)(III); 和第二步骤:从第一步中制备的固体中除去模板的步骤。
摘要:
The invention relates to a catalyst, in particular for the partial oxidation of methane or natural gas to formaldehyde and/or methanol in the tange of 550-800null C. with oxygen or air, comprising a silica carrier having a BET-surface area of about 50 to 800 m2/g, a pore volume of about 0.01 to 2 cm3/g, a silanol group content of about 0.01 to 2/nm2, a content of alkaline, alkaline earth and titania impurities of less than about 1.0 weight % and a content of alumina of about 0 to 1 weight % and an iron loading, expressed as Fe2O3, in the range of about 0.01 to 5 weight %, wherein the Fe-loading is about 0.01 to 10 Fe-atoms/nm2 and the iron present as isolated Fe2null/3null-ions is higher than 10 weight %. The invention also relates to a method for preparing such catalyst and its use.
摘要:
The present invention concerns a catalyst for the production of high density polyethylene, by homopolymerising ethylene or copolymerising ethylene and an alpha-olefinic comonomer comprising 3 to 10 carbon atoms, prepared by the steps of: a) selecting a silica support with a specific surface area larger than 300 m2/g; b) treating the silica support with a titanium compound, in order to introduce titanium into the support, or with an aluminium compound, in order to introduce aluminium into the support; c) either treating the titanated silica support with an aluminum compound, in order to introduce aluminum into the titanated silica support, or treating the aluminated silica support with a titanium compound, in order to introduce titanium into the aluminated silica support; d) depositing a chromium compound on the titanated and aluminated silica support to form a catalyst; e) activating the catalyst of step d) under air in a fluidised bed at a temperature of from 600 to 800null C.
摘要:
The present invention teaches a method for increasing the cobalt surface area per gram of catalyst in a cobalt Fischer-Tropsch catalyst, supported on a silica-based carrier material, by using cobalt amine carbonate precursors. A Fischer-Tropsch catalyst preferably includes a catalytically active first metal containing cobalt, and a carrier material containing silica or a silica compound with a cobalt surface area greater than 13 m2/g catalyst. The catalyst active in the FT reaction has a minimum alpha value of 0.87 and a CO conversion of 24 wt % or more. In accordance with another preferred embodiment, a process for producing a Fischer-Tropsch catalyst includes saturating silica or silica compounds with a solution of cobalt amine carbonate, removing the excess solution by filtration, heating the resulting product in order to allow cobalt hydroxycarbonate to precipitate, and drying and calcining the resulting product. Optionally the calcined product is reduced.
摘要:
A method for making a silica supported catalyst involves impregnating a silica component with a catalytic metal using an aqueous, alkaline bath before drying. More specifically, the method involves forming and washing a silica component, such as a silica gel or a co-gel, for example a silica-zirconia co-gel. Then, the washed silica component is contacted with the alkaline bath to effect the impregnation with the catalytic metal, such as cesium, to form an activated silica component. Subsequently, the activated silica component is dried to form the catalyst. The resulting catalysts demonstrate good mechanical strength.
摘要:
The present invention has an object to obtain a ceramic body that can support a required amount of catalyst component, without lowering the characteristics such as strength, being manufactured without forming a coating layer and providing a high performance ceramic catalyst body that is excellent in practical utility and durability. Such a ceramic body that is made by substituting at least one kind among the constituent elements of cordierite that constitutes the substrate ceramic, for example Al, with W that is the element having an empty orbit in d or f orbit, has high bonding strength and is less susceptible to deterioration since the catalyst component Pt is supported by means of chemical bonding.
摘要:
A mixed metal oxide, which may be an orthorhombic phase material, is improved as a catalyst for the production of unsaturated carboxylic acids, or unsaturated nitrites, from alkanes, or mixtures of alkanes and alkenes, by: contacting with a liquid contacting member selected from the group consisting of organic acids, alcohols, inorganic acids and hydrogen peroxide to form a contact mixture; recovering insoluble material from the contact mixture; and calcining the recovered insoluble material in a non-oxidizing atmosphere.
摘要:
A catalyst comprising a promoted mixed metal oxide is useful for the vapor phase oxidation of an alkane or a mixture of an alkane and an alkene to an unsaturated carboxylic acid and for the vapor phase ammoxidation of an alkane or a mixture of an alkane and an alkene to an unsaturated nitrile.
摘要:
A process and catalyst for the direct oxidation of an olefin having three or more carbon atoms, such as propylene, by oxygen to the corresponding olefin oxide, such as propylene oxide. The process involves contacting the olefin with oxygen under reaction conditions in the presence of hydrogen and in the presence of a catalyst. The catalyst comprises gold on a titanosilicate, preferably a microporous or mesoporous titanosilicate, such as, TS-1, TS-2, Ti-beta, Ti-ZSM-48, or Ti-MCM-41. Selectivity to the olefin oxide is high at good conversions of the olefin. The catalyst is readily regenerated, and the time between catalyst regenerations is long.
摘要:
A material useful as catalyst for the hydrogenation of alpha, omega-dinitriles comprises (a) iron or a compound based on iron or mixtures thereof, (b) from 0.001 to 0.3% by weight based on (a) of a promoter based on 2, 3, 4 or 5 elements selected from the group consisting of aluminum, silicon, zirconium, titanium and vanadium, (c) from 0 to 0.3% by weight based on (a) of a compound based on an alkali and/or alkaline earth metal, and also (d) from 0.001 to 1% by weight based on (a) of manganese.