72results about How to "Reduce strong interactions" patented technology

The invention discloses a preparation method of an eggshell-type hydrogenation catalyst. The preparation method is characterized in that conventional carriers are dipped in an active metal dipping solution containing one or more thickening agents and one or more active metal dispersants under the condition of air bubbling and then are subjected to drying and calcination so that the eggshell-type hydrogenation catalyst is obtained. The preparation method can effectively adjust the thickness of a surface active metal shell layer of the eggshell-type hydrogenation catalyst and the dispersity of active metals, stabilize the active metals of the eggshell-type hydrogenation catalyst, reduce the loss of the active metals, and reduce an eggshell-type hydrogenation catalyst product cost.

The invention relates to a preparation method of a palladium adsorbent used for deep desulfurization of benzene. The method utilizes a carbon template agent that can leave reductive groups after carbonization to increase the sulfur capacity of the palladium adsorbent, comprising: in the palladium adsorbent precursor In the preparation process, the solution of the carbon template agent is used to impregnate the adsorbent carrier, and then it is dried and calcined to obtain the loaded palladium adsorbent. The invention can realize the uniform dispersion of the active component palladium, which can be used for the deep desulfurization of refined benzene, and can reduce the thiophene in refined benzene to below 10ppb, and the sulfur capacity of the adsorbent is relatively large, up to 1.9g thiophene / kg Adsorbent. The invention can realize high dispersion of metal palladium, weaken the strong interaction between metal palladium and alumina carrier, and is more conducive to improving the desulfurization performance of the palladium adsorbent, especially in the process of deep desulfurization of benzene. The use cost of the palladium adsorbent is reduced.

The invention discloses a preparation method for fluidized bed hydrotreating catalysts, which is characterized in that alumina fiber is also added with the content of 3wt% to 10wt% in the catalyst besides the conventional hydrogenated catalyst component in the catalyst. The invention has the advantages that alumina fiber is added to increase mechanical strength of the catalyst; service life of thecatalyst is prolonged, and production cost is reduced; the complete mixing kneading method is adopted in the preparation method, wherein the hydrogenated active metallic ions are added into the catalyst in the mode of solution ions rather than granular metal salts, thus the metallic ions are dispersed more evenly, and mechanical strength of the catalyst is enhanced; and the acidic adhesive in themethod is added after the mixture of refractory porous inorganic oxide and alumina fiber is wetted by the active metallic solution, thus strong interaction of acid and refractory porous inorganic oxide as well as alumina fiber is greatly mitigated, and loss of pore volume and specific surface area is reduced.

The invention relates to a preparation method of a hydrocarbon hydrogenation treatment catalyst. The catalyst uses γ-Al2O3 as a carrier, VIB and VIII metals as active components, and Ti as active auxiliary agents. The catalyst promoter Ti of the present invention is introduced in the process of producing aluminum hydroxide by the carbonization method by adopting the pH swing method. The preparation method of the catalyst is a complete mixing and kneading method, that is, the aluminum hydroxide dry rubber powder introduced into Ti by adding a titanium salt solution is first added to an alkaline solution containing Mo and / or W, and fully kneaded until the aluminum hydroxide powder is completely mixed. Wet by alkaline solution, then add acidic solution containing Co and / or Ni, knead until the material becomes plastic, extrude, dry and roast to obtain the catalyst. The distribution of the catalyst auxiliary agent Ti prepared by the method of the invention is more uniform, and the performance of the catalyst is obviously improved.