108results about How to "High hydrogenation selectivity" patented technology

The invention provides a catalyst for continuously producing butanedioic anhydride by maleic anhydride hydrogenation. The catalyst is a nickel loaded catalyst prepared by an equivalent-volume impregnation method, wherein in the catalyst, the content of nickel is 13 to 20 weight percent, the content of accelerating agent is 1 to 7 weight percent, and a carrier is a composite oxide of SiO2 and Al2O3 or SiO2-Al2O3. A preparation method for the catalyst comprises the following steps: impregnating impregnation solution blended by ammonia water and active metal salt solution on a carrier subjected to baking pretreatment at a temperature between 400 and 800 DEG C by the equivalent-volume impregnation method to form the catalyst through drying, baking and reducing treatment. The catalyst is applied to continuously preparing the butanedioic anhydride by maleic anhydride hydrogenation on a fixed bed reactor, the conversion rate of maleic anhydride is more than or equal to 99.98 percent, and theselectivity of the butanedioic anhydride is more than or equal to 98.85 percent. The catalyst achieves the technical-scale continuous production of the butanedioic anhydride, and has the advantages of high activity, good selectivity, high yield (more than or equal to 98.83 percent) and long service life.

The invention relates to a selective hydrogenation treatment method for FCC gasoline. A fixed bed reactor is adopted, and a catalyst comprises a silicon oxide-aluminum oxide carrier and metallic active ingredients nickel, molybdenum, zinc and lithium which are loaded on the carrier; the reaction process conditions are as follows: the reaction temperature is 100-230 DEG C, the reaction pressure is1.1-5.5 MPa, the volumetric air speed is 1.2-5.0 h<-1>, and the volume ratio of hydrogen to oil is (7-28) to 1. The method is used for selective hydrogenation of the FCC gasoline to remove mercaptan sulfur and alkadiene.

The invention belongs to the technical field of the catalyst preparation, and in particular relates to a loaded nickel-indium (Ni-In) intermetallic compound catalyst and a preparation method thereof. Adjustable hydrotalcite consisting of components such as nickel magnesium indium-lactate dehydrogenase (NiMgIn-LDHs) and nickel aluminum indium-lactate dehydrogenase (NiAlIn-LDHs) is selected as a precursor, and the hydrotalcite is slowly heated and reduced at a low temperature to prepare the loaded Ni-In intermetallic compound catalyst. The prepared loaded Ni-In intermetallic compound catalyst is adjustable in variety, controllable in granularity, good in dispersion property, high in hydrogenation selectivity, good in heat stability and adjustable in hydrogenation activity and selectivity for different alpha, beta-unsaturated aldehydes. The preparation method has a simple equipment process and high yield and is convenient for the industrialized production. The catalyst is used for catalyzing selective hydrogenation of different alpha, beta-unsaturated aldehydes to produce unsaturated enol, the conversion rate of reactants is high, the selectivity of products is high, and the yield of the unsaturated enol can reach more than 95 percent.

The invention relates to a catalyst for selective hydrogenation of unsaturated hydrocarbons. The catalyst comprises a silica-alumina carrier and metal active components nickel, molybdenum and magnesium loaded on the carrier, and comprises the following components based on the total weight of the catalyst: The nickel oxide content is 7-18wt%, the molybdenum oxide content is 3.5-12wt%, the magnesium oxide content is 0.05-2.0%, and the silica-alumina carrier content is 75-91wt%. The mesopores of the carrier account for 3-70% of the total pores, and the macropores account for 1.5-55% of the total pores. The catalyst is prepared by an impregnation method, and the catalyst has good colloid resistance, arsenic resistance, sulfur resistance and water resistance.