A hydrogenation catalyst composition and its preparation method

Abstract

The invention discloses a hydrogenation catalyst composition and a preparation method thereof. The hydrogenation catalyst composition comprises an oxidation state catalyst, solid sulfur, an auxiliary agent, an organic compound and hydrazine hydrate. The preparation method loads the organic compound on the catalyst, then introduces solid sulfur and auxiliary substances, performs low-temperature heat treatment, and finally loads hydrazine hydrate and then undergoes low-temperature heat treatment; or first introduces solid sulfur and auxiliary substances, then introduces organic compounds, and performs low-temperature heat treatment. Heat treatment, finally introduce hydrazine hydrate, and then carry out low temperature heat treatment. When the catalyst composition is applied, it can not only ensure the complete vulcanization, but also solve the airtight problem of the device.

Description

technical field [0001] The invention relates to a hydrogenation catalyst and a preparation method thereof, in particular to a sulfurized hydrogenation catalyst and a preparation method thereof. Background technique [0002] Oxidized hydrogenation catalysts need to be pre-sulfided before being used. The commonly used pre-sulfurization methods include internal pre-sulfurization and external pre-sulfurization. Among them, pre-sulfurization in the vessel is to put the oxidized catalyst into the hydrogenation reactor, and pass hydrogen and sulfidation agent into the reactor during the heating process to make hydrogen sulfide, so that the hydrogenation active metal in the catalyst is oxidized converted into sulfides. External pre-sulfurization means that the catalyst is combined with the vulcanizing agent before being loaded into the reactor, and then loaded into the reactor, and H 2 , as the temperature rises, the sulfiding agent decomposes to generate hydrogen sulfide, thereby...

AI Technical Summary

Problems solved by technology

Especially when solid sulfur is used as the raw material, since sulfur powder and hydrogen start to react at 100°C to generate a large amount of reaction heat, the initial temperature of vulcanization is low, and the raw material oil needs to be introduced in advance in order to avoid the overheating of the bed, and the device is designed to avoid hydrogen embrittlement. High-pressure airtightness needs to be carried out at a temperature above 135°C, which creates a contradiction between the two, thus becoming an obstacle to the application of external pre-vulcanization technology

Moreover, when sulfur powder is used as the raw material, the conventional external pre-sulfurization technology produces hydrogen sulfide from sulfur powder and hydrogen at the same time when starting the operation, and the reaction of hydrogen sulfide and metal to form metal sulfide will release a large amount of reaction heat, which will easily cause the bed to overheat. , to deactivate the catalyst by carbon deposition

Images