What are the technologies for producing epichlorohydrin using the hydrogen peroxide method? ? ?

Are you asking about the methods for producing epichlorohydrin? Using hydrogen peroxide to produce epichlorohydrin is one such method, right?

This is a relatively new technology; I checked it online and found several patents, but since the detailed descriptions of those patents require payment to access, I gave up on that idea. Based on the principles of the reaction, I infer that it utilizes the oxidizing effect of hydrogen peroxide to replace the traditional saponification process, thereby eliminating the large amount of solid waste generated by saponification in the conventional chlorohydrin method; at the same time, purity and yield are also ensured. The main raw material is chloropropene, and the target product is obtained by reacting an oxygen atom in hydrogen peroxide with the carbon-carbon double bond to form an oxygen bridge bond.

The propylene hydrogen peroxide chlorination method is a patented technology owned by Shandong Kaitai; several units of this technology have been successfully put into operation in China.

There are already a few sets, which means it’s effective

Thank you! Achievements in the localization of technology

On October 26, 2018, the proprietary technology of the \"new process for producing epichlorohydrin using hydrogen peroxide (DECH)\") was approved for evaluation as a scientific and technological achievement in Beijing, organized by the China Petroleum and Chemical Industry Federation. Experts unanimously agree that \"this technology is environmentally friendly and represents a world first; it is recommended to carry out optimizations of the production process and key equipment as soon as possible, so as to establish an industrial-scale demonstration plant at the earliest opportunity, thereby achieving technological upgrades and sustainable development in the epichlorohydrin industry.\" ” This technology was successfully scaled up for industrial use in 2016 at a 5,000 t/a epichlorohydrin production plant using the hydrogen peroxide process in Shandong. Funded by the National Natural Science Foundation, basic research on the green epoxidation of olefins has been carried out since the 1990s. Since 2001, the selective oxidation research group led by the researcher, with the support of projects such as the National Natural Science Foundation of China’s key funds, Sinopec, and the Ministry of Science and Technology’s 973 program, has developed a new process for the direct oxidation of chloropropene to epichlorohydrin using hydrogen peroxide under solvent-free conditions and with phase-transfer catalysis for reaction control, while simultaneously researching propylene epoxidation technology. The calibration results 72 hours prior to the evaluation session showed that the average yield of epichlorohydrin (based on hydrogen peroxide) was ≥90% ； Average selectivity for epichlorohydrin (based on chloropropene) ≥96% ； To produce each ton of product, 0.85 tons of chloropropene (99.2%), 0.78 tons of hydrogen peroxide (51.7%), and 2.88 kg of catalyst are consumed ； Moreover, only 0.59 tons of wastewater that can be treated directly are generated per ton of product produced. 50,000 tons of hydrogen peroxide epichlorohydrin, with an investment of around 250 million yuan; the production cost is much lower than that of the glycerol method. The process package for epichlorohydrin production using the hydrogen peroxide method with an annual capacity of 50,000 tons has been developed and approved by an expert panel, meeting the requirements for carrying out large-scale commercial demonstration applications. For technical licensing, authorization, and transfer of the 50,000 tons/year epichlorohydrin process package using hydrogen peroxide, please contact Liujian Investment Network. Overall, the hydrogen peroxide-based method for epichlorohydrin is more competitive than the glycerol-based method; both have similar costs, but the former causes less pollution, making it a green process that aligns with **industrial policy guidelines**.

In collaboration with the Research Institute of Petrochemical Science, Sinopec Baling Petrochemical Co., Ltd. spent 9 years carrying out pilot and pilot-scale studies on the direct epoxidation of chloropropene to produce epichlorohydrin. These studies covered aspects such as raw material purification, catalyst formulation and preparation, control of the epoxidation reaction and new fixed-bed processes, as well as the extraction and separation of epichlorohydrin and its purification, thereby developing a complete set of technologies for the direct epoxidation of chloropropene to yield epichlorohydrin. Baling Petrochemical plans to build an industrial demonstration plant for environmentally friendly epichlorohydrin with an annual production capacity of 50,000 tons in the Yunxi area of Yueyang, Hunan. Using chloropropene, hydrogen peroxide, methanol, ammonia water, caustic soda, and other materials as primary raw inputs, this plant will produce epichlorohydrin through the direct oxidation method. The main construction tasks include: building a new environmentally friendly epichlorohydrin production line with an annual capacity of 50,000 tons, along with associated chlorine flare systems and TO incineration systems; completion and commissioning of this facility are planned for the end of 2023.

Long time no see! Thank you for participating. Happy May Day!