Unsupported catalyst and preparation method thereof

Abstract

Disclosed are a unsupported catalyst for deeply hydrofinishing of intermediate distillate and method for making the same, particularly a catalyst particle with nanometer pore and relatively high specific surface area obtained by urea melt reaction. The most outstanding technical feature of the invention is that by adopting synthesis technique of urea melt reaction, metal is free of loss, prepared metal composite has nanometer pore and relatively high specific surface area, and could provide abundant catalytic hydrogenation activity bits, and the inventive catalyst has much higher catalytic hydrogenation activity comparing with conventional supported catalyst because of this. Meanwhile, the invention is simple in process, easy to operate, fast in reaction, suitable for industrial production.

Description

technical field

[0001] The invention relates to a non-loaded catalyst for ultra-deep hydrotreating of middle distillate oil and its preparation. It belongs to the improvement of the preparation method of hydrogenation catalyst. Specifically, through the melting reaction of urea, a catalyst particle with nanopores and high specific surface area is obtained, and then extruded to obtain a catalyst that is different from the traditional supported catalyst. The so-called unsupported catalysts, compared with traditional supported catalysts, unsupported catalysts have higher catalytic activity. Background technique

[0002] In recent years, the trend of poor quality of crude oil has become increasingly obvious worldwide, and the content of sulfur, nitrogen and aromatics in petroleum products has been increasing day by day, and the contradiction between increasingly stringent environmental protection requirements and this reality has become more and more acute. More than one-third ...