Aluminum oxide slurry for spray coating and preparation method thereof

Abstract

The invention relates to aluminum oxide slurry for spray coating and a preparation method thereof, which mainly solve the problems that in the prior art, the aluminum oxide slurry has high granularity and poor uniformity and dispersibility, so the blockage is easy to be caused during the spray coating, the atomization effect is poor, and the prepared coating has poor uniformity and poor firmness. The aluminum oxide slurry adopts the technical scheme that the aluminum oxide slurry comprises the following ingredients: water, aluminum sol, aluminum oxide, cation and anion regulating agents and foaming agents, wherein the aluminum sol, the aluminum oxide and the cation and anion regulating agents are dissolved in the water under the stirring condition and are sufficiently mixed, and first slurry is obtained; a certain quantity of foaming agents and water are foamed by a foaming machine, and the foam is added into the first slurry; and the slurry added with the foam is fast emulsified and ground in a short time in a colloid mill. The problems are perfectly solved, and the aluminum oxide slurry can be used for industrial preparation of the aluminum oxide slurry in layered composite carriers.

Description

technical field

[0001] The invention relates to an alumina slurry for spraying and a preparation method thereof. Background technique

[0002] The non-uniform distribution of active components in the carrier can reduce the amount of precious metals and increase the utilization rate of precious metals; at the same time, in many reactions, catalysts with non-uniform distribution also show better activity, selectivity and lifetime than catalysts with uniform distribution. In the early days, the effect of non-uniform distribution was often achieved through the control of impregnation, but it was often difficult to control the distribution range of the catalyst. This requires a special carrier, which is composed of an inert core and a coating, only the coating absorbs metal and the thickness of the coating is controllable, which is a layered composite carrier. A heterogeneous catalyst with controllable thickness and distribution range can be obtained by impregnating the catalyst...

Images