33results about How to "Good catalytic hydrogenation performance" patented technology

A catalyst for the selective catalytic hydrogenation of naphthalene to prepare tetrahydronaphthalene, its preparation method and application. Compared with naphthalene, tetralin is a high-value product, and the method can realize high added value and deep processing of downstream products of coal tar. use. The method adopts a high-temperature and high-pressure reactor, and it is found for the first time that the catalyst in an oxidation state has a significant effect on the selective hydrogenation of naphthalene to prepare tetrahydronaphthalene. Wherein the hydrogenation catalyst used is composed as follows: with γ-Al 2 o 3 as carrier, Ni and Mo as active metals, Al 2 o 3 The content of the carrier is 70%-90%, the total loading of Ni and Mo is 12%-36%, and the loading ratio of Ni and Mo is 1:23-8:16. The invention proposes a high additional utilization method of downstream products of coal tar which has been neglected by people, and the used oxidation state catalyst has the advantages of simple preparation, easy storage, good cycle stability, easy regeneration and the like.

A method for hydrodesulfurization of coked benzene, wherein the preparation process of the hydrodesulfurization catalyst used in the hydrodesulfurization reaction is: adding aluminum oxide and titanium dioxide mixed powder carriers to solutions containing molybdenum, nickel, cobalt, and tungsten active metal elements respectively The solution contains citric acid; the NaZSM‑5 molecular sieve is added to the solution containing copper and / or zinc for impregnation; after drying and roasting, the two are mixed, and the coking benzene is treated by a rectification tower before hydrodesulfurization , and then complete sulfur removal through pre-hydrogenation, main hydrogenation and inorganic sulfur removal processes. The NaZSM-5 molecular sieve loaded with active ingredients has a selective adsorption effect on thiophene; the mixed powder of aluminum oxide and titanium dioxide loaded with active metals has a good catalytic hydrogenation effect on thiophene, and the two synergistically work together to achieve a low reaction rate. Excellent removal effect can also be achieved at low temperature, citric acid can promote the formation of active phase, improve the hydrogenation activity of the catalyst and prolong the retention time of the catalyst activity.