Epichlorohydrin by hydrogen peroxide method

New process (DECH) for producing epichlorohydrin using hydrogen peroxide: new technologies and technological advancements. Epichlorohydrin is a volatile, unstable colorless oily liquid that is slightly soluble in water; it is primarily used in the production of epoxy resins and serves as a key raw material for epoxy and phenoxy resins. Currently, there are mainly three industrial methods for producing epichlorohydrin: the chlorohydrin method, the allyl acetate-allyl alcohol method, and the glycerol method. Due to the long process flow of the allyl alcohol method, as well as its relatively high investment costs and expenses, it has been discontinued in China. Both the chlorohydrin method and the glycerol method present serious environmental problems related to high-salt wastewater, thus there is an urgent need for green manufacturing methods for epichlorohydrin. Technical Overview: This technology represents the first large-scale continuous operation for the catalytic oxidation of propylene to epichlorohydrin via reaction control phase transfer catalysis. It completely solves the problems of saponification wastewater and waste residues generated by the chlorohydrination reaction and the alkaline saponification step in the traditional propylene chloride method. With a simple process route, it opens up a new green and environmentally friendly path for the epichlorohydrin industry ； It marks the maturity of the technology for the continuous production of epichlorohydrin via solvent-free reaction-controlled phase-transfer catalytic oxidation of chloropropene, which possesses complete independent intellectual property rights. Techno-economic indicators under mild conditions: 1. Average yield of epichlorohydrin (based on hydrogen peroxide) ≥90% ； Average selectivity (based on chloropropene) ≥96% ； 2. To produce 1 ton of product, 0.85 tons of chloropropene (99.2%) are consumed, 0.78 tons of hydrogen peroxide (51.7%) is used, and 2.88 kg of catalyst is required. Applications and market prospects: This technology addresses the issue of high-salt wastewater generated in traditional epichlorohydrin production processes, offering broad prospects for widespread adoption. Investment scale: 200,000 tons per year for pilot-scale production, over 500 million for larger scales

We are already using Yangnong’s hydrogen peroxide ECH method