2results about How to "High epoxy value" patented technology

The application discloses a preparation method of 2,2-di(3,3'-epoxycyclohexyl)propane, which uses a cycloalkadiene compound 2,2-di(3,3'-cyclohexenyl)propane as raw material, adopts a titanium silicalite / heteropoly acid phase transfer homogeneous catalytic system, uses hydrogen peroxide as an oxidant, catalytically synthesizes mono-epoxide and di-epoxide, and finally separates, refines and purifies the mono-epoxide (2,3-epoxycyclohexyl-2,3-cyclohexenyl)propane and the target product di-epoxide 2,2-di(3,3'-epoxycyclohexyl)propane through molecular distillation. The application no longer uses a traditional peroxycarboxylic acid process, and the obtained epoxidation product has high yield, high epoxy value, low colority and low chlorine content; meanwhile, the reaction system of the epoxide is simple, the process condition is mild, the reaction time is short, the reaction is safe and controllable, the environment is friendly, the technical and economic requirements can be met, the operation can be continuous, and the application is particularly suitable for occasions of large-scale production.

This invention provides a method for preparing epoxidized soybean oil and a composition for preparing epoxidized soybean oil. The preparation method includes the following steps: mixing soybean oil, an oxidant, a catalyst, and an auxiliary agent, and carrying out an epoxidation reaction to obtain epoxidized soybean oil; wherein, the oxidant is selected from a solution containing organic peroxides; the auxiliary agent is selected from sodium salts of organic acids, and the sodium salts of organic acids are selected from at least one of sodium alkylates and sodium tungstate. The preparation method effectively inhibits the occurrence of side reactions such as ring-opening reactions and excessive oxidation of unsaturated double bonds during the epoxidation process of epoxidized soybean oil by adding sodium alkylates and / or sodium tungstate as auxiliary agents during the preparation of epoxidized soybean oil, significantly improving the epoxy value and epoxy bond stability of epoxidized soybean oil while maintaining a relatively low iodine value.