Who has information on the production process for epichlorohydrin?

It is currently known that the production of epichlorohydrin using the glycerol method is carried out in two steps by two different manufacturers. First, an electrochemical plant converts glycerol into dichloroisopropanol: CH2OH-CH0H-CH2OH + 2HCl → CH2Cl-CHCl-CH2OH or + 2H2O → CH2Cl-CH0H-CH2Cl. Then, an epoxy resin manufacturer converts dichloroisopropanol into epichlorohydrin: CH2Cl-CHCl-CH2OH + NaOH → CH2Cl-CH-CH2 + NaCl → CH2Cl-CH0H-CH2Cl. The new technology developed by the Dalian Institute of Chemical Physics for the direct oxidation of propylene using hydrogen peroxide to produce epichlorohydrin was approved by a panel of experts organized by the Liaoning Provincial Department of Science and Technology last week. This new technology will eliminate the drawbacks of traditional propylene oxide production processes, such as severe pollution, thereby achieving the goal of an environmentally friendly propylene oxide production process that the industry has been striving for. Propylene oxide is a very important basic chemical raw material; the previous industrial production methods mainly included the chlorohydrin method and the co-oxidation method. The chlorohydrin process consumes large amounts of chlorine, causing severe equipment corrosion and environmental pollution. The co-oxidation method uses alkyl hydroperoxides generated by the auto-oxidation of ethylbenzene or isobutane as an oxygen source to catalytically epoxidize propylene, producing propylene oxide and a large amount of by-products; the production process is complex and requires substantial investment in plant construction. Therefore, developing new environmentally friendly and connection-free methods for the production of propylene oxide has always been the goal of researchers. The new technology for the direct oxidation of propylene to propylene oxide using hydrogen peroxide, developed by a research team led by Researcher Gao Shuang from the Dalian Institute of Chemical Physics, simplifies the process flow and reduces catalyst loss compared to the in-situ coupling method developed earlier by the same team ； Compared to traditional industrial production methods, it features a simple process, is environmentally friendly, and has no issue with by-products ； Under the optimized process conditions, after 5 cycles of catalyst reuse, the yield of propylene oxide relative to hydrogen peroxide remained above 87%, with a product distribution selectivity of over 99%. In a suitable detergent system, the new method can directly catalyze the oxidation of propylene by hydrogen peroxide to produce epichlorohydrin with high selectivity, thanks to the next-generation reaction-control phase-transfer catalyst developed by this research group. After the reaction is complete, both the catalyst and the solvent can be reused, making it environmentally friendly. Experiments have shown that the new technique of directly oxidizing propylene with hydrogen peroxide to produce propylene oxide has raw material costs roughly comparable to those of the chlorohydrin method; however, the traditional chlorohydrin method generates 42 tons of wastewater and large amounts of waste residue for every ton of product produced ； With the new method, only 1 ton of wastewater is generated per ton of product produced, which is one fortyth of that produced by the chlorohydrin method, and there is virtually no waste residue. Compared to the latter, the environmental advantages of the new method are better suited to the **strategic needs** of sustainable development. At the same time, the new method can not only address the problems of corrosion and pollution in traditional process routes, but also features a simple overall process that is suitable for industrial application, offering excellent economic and social benefits.

It seems that the glycerin method isn’t used much these days; it’s too expensive. Nowadays, the chloropropene method is what’s used

“The \"improved high-temperature chlorination of propylene\" production process uses propylene, chlorine, caustic soda, and quicklime as the main raw materials. Propylene and chlorine undergo a chlorination reaction at high temperatures to produce chloropropene; after purification, low-boiling and high-boiling substances are removed from chloropropene to obtain pure chloropropene. Chloropropene is then chlorinated to produce dichloropropanol; dichloropropanol reacts with lime milk to yield epichlorohydrin, which is finally refined to obtain the finished product, epichlorohydrin. The process mainly consists of a chloropropene reaction and quenching system, a reaction gas cooling and propylene removal system, a chloropropene purification system, a hydrochloric acid recovery system, an propylene washing and compression system, a propylene drying system, a dichloropropanol reaction system, lime slurry digestion, a cyclization system, and an epichlorohydrin distillation system.

Hehe, who’s going to give it to you without spending some money? I have it; if you want it, you can get in touch with me, but there has to be some effort on your part!

I’m here to learn*; I’ve been working in this field recently. So many character requirements, it’s exhausting