Method for preparing catalyst for catalytic hydrogenation of nitro compound and catalyst

Abstract

The invention relates to a preparation method for a catalyst and the prepared catalyst, in particular to a preparation method used for carrying out catalytic hydrogenation on a nitrocompound to prepare the corresponding catalyst of an amino-compound as well as the catalyst. The preparation method for the catalyst is as follows: diatomite is treated at first; nickel is prepared into nitrate and then prepared into water solution; silica sol is added; then a system is heated to the temperature between 50 and 80 DEG C; under a stirring condition, the diatomite is added; then the pH value of the system is regulated between 7.5 and 8.5 and stirring is carried out for 12 to 16 hours under the temperature of 50 and 80 DEG C, then solid and liquid are separated after cooling and treatments of granulating and drying are carried out; under the temperature of 500 and 700 DEG C, the mixture thereof is reduced by hydrogen; then mixed inert gas containing 5 percent of air is used to carry out passivating treatment under a cooling condition.

Description

technical field

[0001] The invention relates to a preparation method of a catalyst and the prepared catalyst, in particular to a preparation method of a catalyst used for catalytic hydrogenation of nitro compounds to prepare corresponding amino compounds and the catalyst. Background technique

[0002] Traditionally, nickel catalysts for hydrogenation are easy to catch fire in the air, so this kind of nickel catalysts are often made into semi-finished products for easy storage, and need to be activated before use, and then added to the reaction system under the condition of being isolated from the air . Obviously this type of catalyst is extremely inconvenient to use, and the catalytic efficiency is relatively low. The domestically introduced 0104G nickel catalyst manufactured by the American Angle company and the 6504K nickel catalyst manufactured by the German Luina company that are matched with the German polyurethane production process can solve the deficiencies of the e...