2results about How to "Low iodine value" patented technology

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.

The invention relates to the technical field of chemical engineering, in particular to an impurity removal method in the isostearic acid preparation process. According to the impurity removal method, in the process of preparing isostearic acid by taking monomer acid as a raw material, a catalyst is added into a reaction system, and a catalytic hydrogenation reaction is performed in the presence of hydrogen, so that impurities in the reaction system are subjected to ring-opening conversion into stearic acid, and then impurity removal is realized and high-purity isostearic acid is obtained. The monomer acid is used as a raw material, the composite catalyst is used, kettle type hydrogenation reaction is carried out, the low iodine value requirement of a hydrogenation product is met, meanwhile, the impurity stearic acid lactone difficult to separate in the monomer acid raw material is converted into stearic acid, separation and purification of isostearic acid are easy, and the purity of isostearic acid is improved.