Vulcanization method for hydrogenation catalyst

Abstract

The invention relates to a sulfuration method for a hydrogenation catalyst, comprising the following steps of: after only drying the catalyst which hangs and carries an active component to remove free water in the catalyst, sulfurizing directly in a hydrogenation reactor, that is, straight-distilling naphtha or kerosene, adding carbon bisulfide which occupies 2 percent of the mass of the catalyst to prepare sufurized oil; after mixing the sufurized oil with the hydrogen, entering to a hydrogenation reactor while rising the temperature by a heat exchanger, keeping the temperature of the hydrogenation reactor at the decomposition and sulfuration temperature of the catalyst, controlling strictly the rate of temperature rise and preventing the catalyst bed layer from overheating, wherein the decomposition and sulfuration temperature zone of the catalyst is kept between 150 and 450 DEG C, and the rate of temperature rise is kept between 10 and 30 DEG C / h; after the ending of the decomposition and sulfuration of the catalyst, the system program lowers the temperature so as to control the rate of the temperature fall to be between 25h and 45 DEG C / h, when the temperature is lowered to be the normal reaction temperature of the catalyst, the sufurized oil is shifted into raw material oil which requires the hydrofinishing treatment, thereby beginning the hydrogenation treatment, wherein the treated gasoline is controlled between 180 and 220 DEG C, and the treated diesel oil is controlled between 240 and 290 DEG C. The catalyst sufurized in the method carries out the hydrofinishing for oil products, which has excellent desulfurization effect and less impact upon octane value.

Description

technical field [0001] The invention relates to a catalyst sulfuration method, in particular to a gasoline and diesel hydrogenation catalyst sulfuration method. Background technique [0002] Hydrogenation is the main means to increase the depth of crude oil processing and improve the quality of oil products. Hydrogenation can deeply remove sulfur, nitrogen, oxygen and other impurities in oil products. [0003] Commonly used hydrogenation catalysts mainly contain two or more main active metal elements in Mo, Co, W, Ni, and others include K, Ca, P, Mg, Fe, Cr, Zr, B, Cu, Ti, F and other auxiliary components. Generally, when the catalyst factory is processing the catalyst, the active component precursor of the loaded catalyst is roasted at high temperature and decomposed into metal oxides dispersed on the catalyst carrier. [0004] Due to the low activity and poor stability of supported metal oxide catalysts, the activity and stability of catalysts must be greatly improved by...

AI Technical Summary

Problems solved by technology

The internal sulfidation method has the advantages of simple catalyst preparation, storage, and mature technology; the external presulfurization operation process is relatively simple, but the requirements for catalyst preparation, transportation, and storage are greatly increased. overheating

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