Binhua Co., Ltd. was granted an invention patent: “A device and method for purifying 1,2-dichloropropane as a by-product of a 3-chloropropene production process that combines distillation, chlorination, and adsorption.””
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According to data from the Tianyancha app, Binhua Co., Ltd. (601678) has newly obtained an invention patent grant. The title of the patent is “A device and method for purifying 1,2-dichloropropane as a by-product of a 3-chloropropene production process, combining distillation, chlorination, and adsorption.” The patent application number is CN202411389747.0, and the grant date is February 17, 2026. Patent Abstract: The present invention discloses a refining device and a refining method for 1,2-dichloropropane, which is a by-product of 3-chloropropene production processes. This device utilizes a combination of a light-end removal tower, a chlorination reactor, a heavy-end removal tower, and an adsorption tower to cause dichloropropene compounds, which are difficult to separate from 1,2-dichloropropane, to react with chlorine. This reaction results in the formation of saturated chlorinated compound by-products that can be easily separated from 1,2-dichloropropane, thereby purifying 1,2-dichloropropane. As a result, the 1,2-dichloropropane produced as a by-product in the 3-chloropropene production process has a purity of ≥99.9%, with residual dichloropropene present in small amounts
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