Zirconium dioxide loaded microsphere type silica gel superstrong acid catalyst

Abstract

The invention relates to a ball silica gel solid corrosive acid catalyst which loads zirconia used in esterification and dehydration, wherein said silica gel solid corrosive acid has 1000 times protonation ability then dense sulfuric acid. And the ball silica gel solid corrosive acid uses porous ball silica gel as carrier, and absorbs zirconia and sulfuric acid in the inner hole of silica gel, with the properties of powder corrosive acid and the application in solid bed reactor, to process esterification at high pressure and temperature, to improve its transfer rate.

Description

technical field

[0001] The invention relates to a superacid catalyst in chemical reactions, in particular to a small spherical silica gel solid superacid catalyst loaded with zirconium dioxide for carboxyl-hydroxyl esterification reaction or hydroxyl dehydration reaction. Background technique

[0002] Since M.Hino and K, Arat, J.C successfully synthesized ZrO in 1980 2 and TiO 2 as a carrier, and loaded with H 2 SO 4 After solid superacids, solid superacids have been widely used as new types of acidic catalysts with less pollution and no corrosion. Since the existing solid superacids are all in the form of powder, they can only be applied in ebullating bed and tank reactors, and bring troubles in separating catalysts. Contents of the invention

[0003] The purpose of the present invention is to address the deficiencies in the prior art, using macroporous small spherical silica gel as a carrier, and adsorbing zirconium dioxide and sulfuric acid in the inner pores of the...

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