Liugang Steel Co., Ltd. was granted an invention patent: “A method for desulfurization and decyanidation of coke oven gas using mono- and bimetallic synergistic catalysis””

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Liugang Steel Co., Ltd. has been granted an invention patent: “A method for desulfurization and decyanidation of coke oven gas using mono- and binary synergistic catalysis.” According to data from the Tianyancha app, Liugang Steel Co., Ltd. (601003) has obtained a new invention patent; the title of this patent is “A method for desulfurization and decyanidation of coke oven gas using mono- and binary synergistic catalysis”. The patent application number is CN202310736116.0, and the date of grant is January 30, 2026. Patent abstract: The present invention discloses a method for desulfurizing and decyaniding coke oven gas using mono-catalytic and binary-catalytic synergy. The method comprises the following steps: dividing the coke oven gas desulfurization system into 1 mono-catalytic desulfurization unit and multiple binary-catalytic desulfurization units, with each unit carrying out catalytic desulfurization in parallel and in synergy ； The single-catalyst desulfurization unit handles 25–30% of the total gas volume, while the combined capacity of all dual-catalyst desulfurization units handles 70–75% of the total gas volume. The monovalent catalytic desulfurization unit uses cobalt phthalocyanine sulfonate-based compounds as desulfurizing agents, forming a single catalytic system ； Complexed iron catalysts are added to each binary catalytic desulfurization unit, and the primary catalytic filtrate containing PDS catalyst generated by the primary catalytic desulfurization units is sent to these binary catalytic desulfurization units for reuse ； Coke oven gas after one-element and two-element synergistic catalytic desulfurization contains H2S < 50 mg/Nm3. The desulfurization process of this invention requires a low level of alkalinity, which enables effective reduction in the consumption of alkaline substances and minimizes the occurrence of side reactions. It provides stable desulfurization results, generates less waste liquid, and prevents clogging of the filler in the desulfurization tower. Since the beginning of this year, Liugang Steel has obtained 20 new patent approvals, a 81.82% increase compared to the same period last year. Based on the company’s financial figures for the first half of 2025, the company invested 399 million yuan in research and development during that period, a decrease of 54.26% compared to the previous year. According to Tianyancha’s big data analysis, Liuzhou Iron and Steel Co., Ltd. has made investments in 3 companies in total and participated in 22,263 bidding projects ； Regarding property clues, there are 11 trademark records and 1,450 patent records ； In addition, the company holds 520 administrative licenses.