Inorganic intercalation nano catalyst and preparation process thereof

Abstract

The present invention relates to an inorganic intercalation nano catalyst and its preparation method. It is an inorganic intercalation nano catalyst made up by using zinc binary carboxylate as insert and using montmorillonite, mica, vermiculite, moscow earth and kaolin as base body, and its preparation method includes the following steps: activating inorganic base body powder for 2-10 hr. at 600-1000 deg.C, cooling for stand-by; dissolving zinc binary carboxylate in strong polar solvent, then making it and inorganic base body implement intercalation reaction for 30-120 min, then adopting the weak polar solvent to make lattice modification so as to obtain the invented catalyst with good catalytic efficiency and good selectivity.

Description

technical field [0001] The present invention relates to an inorganic intercalation nano catalyst and its preparation method, especially an inorganic intercalation nano catalyst used to catalyze the alternating copolymerization reaction of epoxy compound and carbon dioxide to synthesize polyalkylene carbonate with high alternation degree and its preparation method. Background technique [0002] Polyalkylene carbonates can be obtained by alternating copolymerization of epoxy compounds and carbon dioxide, which can be widely used in low-temperature oxygen barrier films, biodegradable plastics, elastomers, adhesives, coatings and other fields. The synthesis of this type of polymer can effectively utilize the greenhouse gas carbon dioxide, which is a large amount of waste in the industry and causes great harm to the environment. economic and social benefits. The classic catalytic system of this reaction has following several classes: (1), diethyl zinc...

AI Technical Summary

Problems solved by technology

The classic catalytic system of this reaction has following several classes: (1), diethyl zinc and the water of equimolar number, the main catalyst diethyl zinc of this system is very sensitive to trace water vapor and oxygen, is difficult to handle, still must use a large amount of Strictly dry solvent dioxane, which is costly and inefficient

(2), using porphyrin metal complexes as catalysts, although the catalytic efficiency has been greatly improved, the preparation of such complexes and their raw materials is cumbersome, and the price is also quite high. The glass transition temperature of the prepared polymer very low

The synthesis of the catalytic system is simple, no solvent is needed in the polymerization process, and the cost of the catalyst is relatively low, but the catalytic efficiency is still not ideal. The catalytic efficiency of zinc glutarate is below 210 grams of polymer / gram of zinc, while the catalytic activity of zinc adipate It is below 65 grams of polymer / gram of zinc

The catalytic cost of synthesizing copolymerization products based on the above types of classic catalysts is still difficult to be borne by industrial production