Preparation method of high-purity bis-diglycerol polyacyl adipate-2

By combining vacuum feeding and dehydration pretreatment with specific raw material ratios and zinc oxide or bismuth oxide catalysts, the problems of difficult catalyst separation and low purity in the traditional synthesis of bis-diglycerol polyacryl adipate-2 have been solved, realizing a high-purity and environmentally friendly preparation method, and improving the stability and safety of the product.

CN122102900APending Publication Date: 2026-05-29YICHANG MINGYA NEW MATERIAL TECH CO LTD
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Patent Information

Application Number
CN202610141334.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-02-02
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

The traditional synthesis of bis-diglycerol polyacryl adipate-2 involves expensive and difficult-to-separate catalysts, uncontrollable reactions, low product purity, complex processes, and is not environmentally friendly.

Method used

After vacuum feeding and dehydration pretreatment, zinc oxide or bismuth oxide catalysts are added. The reaction temperature and vacuum level are controlled, and high-purity products are obtained after filtration. Using raw materials such as caprylic/capric acid, isostearic acid and adipic acid in specific molar ratios reduces catalyst residue and improves product selectivity.

Benefits of technology

The preparation of high-purity bis-diglycerol polyacryl adipate-2 was achieved, which reduced production costs, improved product safety and process controllability, reduced wastewater discharge, and improved product stability and safety.

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Abstract

The invention provides a preparation method of high-purity bis-diglycerol polyacyl adipate-2, and relates to the technical field of organic synthesis. The preparation method comprises the following specific steps: S1, putting diglycerol and mixed acid into a reaction kettle, carrying out vacuum heating to melt the material, removing water, and uniformly mixing to obtain a material; s2, adding a catalyst into the material, carrying out esterification reaction, and measuring an acid value after the reaction is finished; and S3, after the acid value reaches the standard, cooling in a vacuum state, and filtering to obtain the bis-diglycerol polyacyl adipate-2. All the raw materials except the catalyst are subjected to vacuum heating material melting in advance, the mixing uniformity of the raw materials is improved, the raw materials are subjected to water removal pretreatment in a vacuum state, it is ensured that the water content of the materials is low, the reaction is promoted to be carried out forwards, the catalyst is added for a heat preservation reaction after water removal pretreatment, reaction starting during material melting is avoided, and the reaction efficiency is improved. The first-step process of the reaction is better controlled, the product selectivity is better, side reactions are few, the final product purity is high, and the technological process is more controllable.
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