Organic tin-containing nanomaterial for catalyzing water-phase esterification reaction

Abstract

The invention relates to an organic tin-containing nanomaterial for catalyzing a water-phase esterification reaction, which relates to an organic tin-containing nano-catalyst, and further relates to a nano-microsphere for preparing a tetraorganodistannoxane-containing derivative and application of the nanomaterial to catalyzing an esterification reaction of acid and alcohol in a water phase. Compared with the conventional organic tin catalyst, the catalyst disclosed by the invention has the advantages that: the catalyst can be used for catalyzing the esterification reaction in the water phase without using any organic solvent, so that the cost is lowered, tin is not left in a product simultaneously, the purity of the product is increased, and pollution on the environment is lowered; and the catalyst can be used circularly, so that the organic tin-containing nanomaterial is an environmentally-friendly catalyst.

Description

technical field [0001] The present invention relates to nano-catalysts containing organotin, and more specifically to preparing nano-microspheres containing tetrahydrocarbyl distannoxane derivatives, and using this nano-material to catalyze the esterification reaction of acid and alcohol in water phase . Background technique [0002] Traditional organotin compounds are effective catalysts for various reactions in organic chemistry. In particular, tetrahydrocarbyl distannoxane and its derivatives have a wide range of catalytic activities, which can catalyze transesterification, esterification, acylation of alcohols, synthesis of carbamates, synthesis of carbonic acid diesters, Catalyze the synthesis of glycerol carbonate, and catalyze the protection and deprotection reactions of carbonyl groups. However, such traditional organotin compounds are usually dissolved in the system during the catalytic reaction, so there is usually tin residue in the product, which is difficult t...

AI Technical Summary

Problems solved by technology

However, such traditional organotin compounds are usually dissolved in the system during the catalytic reaction, so there are usually tin residues in the product, which are difficult to remove

In order to overcome this shortcoming, a class of supported organotin catalysts is synthesized (CN1215731, CN1714935), but even if organotin is loaded on polymer or inorganic carrier, the product obtained by catalysis still has tin residue of 50-100ppm, and , both traditional organotin catalysts and supported organotin catalysts can only catalyze reactions in organic solvents, but have no catalytic effect on reactions in aqueous solvents

In short, the current organotin catalysts have disadvantages such as large residues and the need for organic solvents, resulting in high reaction costs, insufficient product purity, and greater pollution to the environment.

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