27816-23-5Relevant articles and documents
Method for synthesizing cyanoacrylate
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Paragraph 0044; 0045, (2016/10/10)
The invention discloses a method for synthesizing cyanoacrylate. The method comprises steps as follows: cyanoacetic ester and dialkoxymethane are taken as raw materials and have a condensation reaction under the catalytic action of a catalyst, and a reaction mixture of a cyanoacrylate containing oligomer and byproduct alcohol is obtained; the byproduct alcohol and unreacted dialkoxymethane are separated, a stabilizer is added to the remaining reaction mixture, cracking distillation under the reduced pressure is performed, and a cyanoacrylate crude product is obtained; the crude product is purified, and a finished product, namely, cyanoacrylate is obtained. Solid paraformaldehyde is not used any more, the difficulty of solid feeding is reduced, a dehydration step is not required, a dehydrating agent is not required to be used, defects of a condensation polymerization process using solid paraformaldehyde and using a solvent for continuous dehydration in conventional cyanoacrylate synthesis are avoided, the reaction process is easier to control, the process is simple, the operability is high, the method is economical and reasonable, discharge of three wastes and pollution to the environment are greatly reduced, and the method has good social benefits.
