Method for preparing macroporous vulcanization-type hydrogenation catalyst through one-step molding

Abstract

The invention provides a method for preparing a macroporous vulcanization-type hydrogenation catalyst through one-step molding. The method comprises (1) uniformly mixing a vulcanization agent, a vulcanization aid and additive granules, keeping the mixture at the constant temperature of 90-150 DEG C for 5-50min, adding an aqueous solution containing a hydrogenation active metal into the mixture, carrying out a reaction process at a temperature of 100-140 DEG C for 5-60min, and separating to remove the additive granules so that a liquid mixture I is obtained, (2) uniformly mixing a peptizing agent, water and urea to obtain a liquid mixture II, (3) carrying out mixing kneading on the liquid mixture I, the liquid mixture II and an aluminum source and extruding the mixture to obtain a wet material, and (4) carrying out ammonia treatment on the wet material, and then freezing, drying and calcining the treated wet material to obtain the vulcanization-type hydrogenation catalyst. The method realizes synchronization of catalyst preparation and vulcanization. The pore distribution of the catalyst is concentrated, the preparation process is simple, the catalytic activity of the catalyst is improved, the preparation cost of the catalyst is reduced, and the application prospect in the market is relatively broad.

Description

technical field [0001] The invention relates to a preparation method of a one-time molding macroporous vulcanization type hydrogenation catalyst. Background technique [0002] Hydrofining, hydrotreating, hydrocracking and other oil refining catalytic hydrogenation production processes are environmentally friendly oil refining production processes, which can be widely used in the production of clean petroleum products such as gasoline, kerosene, diesel oil, lubricating oil, and paraffin. With the continuous upgrading of product quality, increasingly stringent environmental protection regulations, and the increasingly inferior and heavy crude oil, hydrogenation technology has been widely valued and applied all over the world. The demand for hydrogenation catalysts is increasing year by year, and most of these catalysts are sulfurized to obtain better performance. The presulfidation of catalysts (conversion of active metals from oxide state to sulfide state) in the hydrogenati...

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Problems solved by technology

The present invention completes the catalyst preparation and vulcanization process at the same time, obtains suitable pore structure and catalytic performance, has simple preparation process, improves the catalytic activity of the catalyst, reduces the catalyst preparation cost, and effectively solves the problem of concentrated heat release and low initial temperature of the catalyst vulcanization reaction. problem, and the catalyst prepared by the method of the present invention can obtain a larger pore volume, and the pore distribution of the catalyst is more concentrated, which meets the actual needs of current domestic oil refining enterprises and has a relatively broad market application prospect

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