Hydrogenation catalyst, preparation method thereof, and hydrotreating method of aromatic hydrocarbon-containing oil

Abstract

The invention relates to the field of hydrotreating of aromatic hydrocarbon-containing oil and particularly provides a hydrogenation catalyst, a preparation method thereof, and a hydrotreating methodof aromatic hydrocarbon-containing oil. The catalyst contains a supporter and an active metal component supported on the supporter. The active metal component is at least one selected from metal elements in VIB group and non-noble metal element in the VIII group. The supporter contains a ten-membered silicon-aluminum molecular sieve of which the molar ratio of silicon oxide to aluminum oxide is 120-300. The supporter has mesoporous structure; a closed hysteresis loop exists at the position P / P0 = 0.4-0.99 on a low temperature nitrogen adsorption-desorption curve, the start position of the closed hysteresis loop being at the position P / P0 = 0.4-0.7. When the hydrogenation catalyst is used for hydrotreating of the aromatic hydrocarbon-containing oil, a target product is high in aromatic hydrocarbon saturation degree.

Description

technical field [0001] The invention relates to the field of hydrogenation treatment of oil containing aromatics, in particular to a hydrogenation catalyst, a preparation method thereof and a method for hydrogenation of oils containing aromatics. Background technique [0002] Under aerobic conditions, the oil produced by hydroprocessing (such as high-grade lubricating oil, food-grade white oil, etc.) is very sensitive to sunlight and ultraviolet radiation. Exposure to sunlight and air will cause the appearance and performance of the oil to be unstable, and the color of the oil will deepen , in severe cases, precipitation occurs. This type of oil requires low viscosity, high flash point and boiling point, and low volatility. Colorless, odorless, low aromatics content, non-corrosive, good thermal stability and oxidation stability, not easy to cause gelation, good biological performance, in line with environmental protection requirements. [0003] To solve the above problems,...

AI Technical Summary

Problems solved by technology

CN1382632A discloses a super-stabilizing method of small-grain Y-type zeolite, which is obtained by contacting the dry gas of silicon tetrachloride with small-grain NaY zeolite and washing it. The stability is poor, and the inventive method adopts gas-phase dealumination to supplement silicon to process molecular sieves, which makes the thermal and hydrothermal stability of the product worse, and the activity is low

In this method, the raw material needs to be treated with ammonium hexafluorosilicate for dealumination of silicon, and then undergo hydrothermal treatment and other treatments, so as to reduce the collapse of the molecular sieve skeleton structure and improve the crystallization retention of the molecular sieve. After treatment with ammonium hexafluorosilicate for dealumination and silicon supplementation, due to the isomorphic substitution of silicon and aluminum, the molecular sieve silicon oxide aluminum structure is relatively complete, and then hydrothermal treatment will form less secondary pores, and the proportion of secondary pores is low. Facilitate the diffusion of reaction products, low saturation of aromatics

Images