Alumina supporter and preparation method thereof

Abstract

The invention provides an aluminum oxide carrier and a preparation method thereof. The aluminum oxide carrier takes a mixture prepared by mixing pseudo-boehmite powder prepared by the carbonization method and pseudo-boehmite powder prepared by the aluminum sulfate method according to a weight proportion of 1:0.1 to 5 as a precursor and a complex acid as a peptizing agent; substances such as zirconium, titanium, silicon, alkali metals, alkaline-earth metals, rare-earth metals, carbon black, and the like, are added during kneading process; then the aluminum oxide carrier is obtained after forming, drying and roasting. The physical properties of the carrier are as follows: pore volume is 0.4 to 1.2ml / g; specific surface area is 180 to 370m<2> / g; pores with the diameter being more than 100nm accounts for more than 90 percent of total pore volume; the amount of B acid is 0.1 to 0.3mmol / g; the amount of L acid is 0.2 to 0.5mmol / g. The carrier is especially applicable to the preparation of 1, 4-butanediol catalysts in the two-stage hydrogenation catalytic synthesis of 1, 4-butynediol.

Description

technical field [0001] The invention relates to an alumina carrier, in particular to an alumina carrier used in a catalyst for the two-stage hydrogenation catalytic synthesis of 1,4-butynediol to synthesize 1,4-butanediol and a preparation method thereof. Background technique [0002] Alumina has been widely used as a supported catalyst carrier in the field of heterogeneous catalysis due to its unique structural properties, surface properties and good thermal stability. [0003] The use of alumina as a catalyst carrier for the catalytic synthesis of 1,4-butanediol in the two-stage hydrogenation of 1,4-butynediol has been reported in the literature, such as: [0004] CN 1081174A Preparation of Ni-Al by co-precipitation method in Beijing Research Institute of Chemical Industry, Ministry of Chemistry and Chemical Industry 2 o 3 The catalyst is used for two-stage fixed-bed hydrogenation. An obvious disadvantage of co-precipitation catalysts is that the interaction between the...

AI Technical Summary

Problems solved by technology

An obvious disadvantage of co-precipitation catalysts is that the interaction between the active component and the carrier is strong, and it is not easy to reactivate before the hydrogenation reaction.

[0005] In USP 3950441 and USP 3759845, GAF Company of the United States mentioned the use of gamma-Al with low silicon content 2 o 3 Loading Ni-Cu-Mn active component is used for butynediol two-stage hydrogenation catalytic synthesis butanediol catalyst support, but the pore volume of the alumina support mentioned in the example is small, is unfavorable for the dispersion and the active component The release of hydrogenation products