Compound stabilizer for epoxidation reaction of unsaturated compound and application method thereof

Abstract

The invention discloses a compound stabilizer for the epoxidation reaction of an unsaturated compound and an application method of the compound stabilizer. The compound stabilizer comprises carbamide, ethylene diamine tetraacetic acid, potassium sodium tartrate and sodium silicate. Peroxide and a peroxoic acid stabilizer including the ethylene diamine tetraacetic acid, the potassium sodium tartrate, concentrated sulfuric acid and 732 resin are uniformly mixed; the addition of the peroxoic acid stabilizer is 0.1 to 5 wt% of that of the peroxide; organic acid is dropwise added to the peroxide and the peroxoic acid stabilizer at 25 to 35 DEG C, so that peroxoic acid mixed solution is obtained after reaction; an epoxidation stabilizer including the carbamide, the ethylene diamine tetraacetic acid, and the potassium sodium tartrate and the sodium silicate is added into the unsaturated compound, and then the peroxoic acid mixed solution is added into the epoxidation stabilizer at 65 to 95 DEG C, so that an epoxidation compound is obtained after epoxidation reaction. The compound stabilizer has the advantages that the coordination of various stabilizers improves the stability of hydrogen peroxide and peroxoic acid in reaction solution, the frequency of the occurrence of secondary reaction is reduced, the reaction time is shortened, and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of epoxidation reactions, in particular to a composite stabilizer for epoxidation reactions of unsaturated compounds and applications thereof. Background technique [0002] The main component of vegetable oil is triglyceride formed by glycerin and fatty acid, with an average molecular weight of 800-1000, which contains a large amount of unsaturated fatty acid. The existence of double bonds has a great influence on the performance and use of oil products. On the one hand, it has good low-temperature fluidity, and on the other hand, the double bonds of vegetable oil can be modified by chemical or biological methods. The most successful example of double bond modification of vegetable oil is to epoxidize vegetable oil to prepare epoxy vegetable oil. Epoxy vegetable oil can be used as a plasticizer and toughener for engineering plastics, which broadens the use of vegetable oil and is conducive to increasing the ...

AI Technical Summary

Problems solved by technology

[0009] Because epoxidation is a typical heterogeneous reaction, the compatibility of each reactant is poor, and currently all use inorganic strong acid or strong acidic cation exchange resin as the main catalyst, under this condition, there will be many reactions in the epoxidation reaction process. Side reactions occur, and the generated epoxy bonds will open rings to form oligomers, reducing the epoxy value of the product, and the post-treatment process is complicated