Polyacid intercalation hydrotalcite catalytic material and preparation method therefor

Abstract

The invention discloses a series of novel polyacid intercalation hydrotalcite catalytic materials and a preparation method therefor, and belongs to the technical field of inorganic-inorganic composite material preparation. Preparation steps are: firstly preparing an Mg-Al hydrotalcite laminate board; and intercalating polyacid into the hydrotalcite laminate board by using a peeling recombination method, to prepare a series of polyacid intercalation hydrotalcite catalytic materials. The prepared polyacid intercalation hydrotalcite catalytic material not only solves problems that an impurity phase is likely to appear in a traditional polyacid intercalation hydrotalcite process and the like, but also has relatively high catalytic activity for addition reactions of fatty aldehyde, aromatic aldehyde and ketone. Therefore, the invention has great meanings for solving the problem that an impurity phase is likely to appear in a synthetic process of traditional polyacid intercalation hydrotalcite.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic-inorganic composite materials, and in particular relates to a series of multi-acid intercalated hydrotalcite catalytic materials and a preparation method thereof. Background technique [0002] Polyoxometalates (polyacids) are a class of multimetal oxides containing V, Mo, W and other metals. Isopolyanions formed by the condensation of the same oxoacid ions are called isopolyacids. The condensation of different types of oxyacid anions is called heteropolyanion, and the acid is called heteropolyacid. At present, it is known that the atoms of nearly 70 kinds of elements can be used as heteroatoms in heteropolyacids, including all the first series transition elements, almost all the second and third series transition elements, plus B, Al, Ga, Si , Ge, Sn, P, As, Sb, Bi, Se, Te, I, etc. And each heteroatom can often exist in heteropolyanions in different valence states, so there are...

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Problems solved by technology

[0004] The purpose of the present invention is to synthesize a series of multi-acid intercalation hydrotalcite catalytic materials, which solves the problem that the traditional multi-acid intercalation hydrotalcite is prone to impurity phase and Mg 2+ 、Al 3+ churn problem

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