Wanhua Chemical has been granted an invention patent: “A method for preparing a catalyst for the catalytic decomposition of chlorobenzene and a method for the catalytic decomposition of chlorobenzene””

Thread Content

Wanhua Chemical has been granted an invention patent: “A method for preparing a catalyst for the catalytic decomposition of chlorobenzene and a method for the catalytic decomposition of chlorobenzene”. As shown by data from the Tianyancha app, Wanhua Chemical (600309) has obtained a new invention patent; the title of this patent is “A method for preparing a catalyst for the catalytic decomposition of chlorobenzene and a method for the catalytic decomposition of chlorobenzene”. The patent application number is CN202310948545.4, and the date of grant is August 29, 2025. Patent abstract: The present invention discloses a method for preparing a catalyst for the catalytic decomposition of chlorobenzene, as well as a method for the catalytic decomposition of chlorobenzene. This invention uses cobalt as the active component and cerium-zirconium as dual promoters; special chelating agents are employed to strengthen the mixture of cobalt, cerium, and zirconium. This not only improves the dispersion of Co within the catalyst but also increases its specific surface area, thereby enhancing the catalyst’s reactivity. It also ensures that the catalyst maintains good stability in an environment containing hydrogen chloride. Catalyst decomposition is carried out in a fixed-bed device. It has led to an improvement in the quality of dry hydrogen chloride delivered from the isocyanate plant, reduced the chlorine benzene content in this dry hydrogen chloride, and simultaneously enhanced the operational stability of the downstream fixed-bed catalytic oxidation unit. Since the beginning of this year, Wanhua Chemical has obtained 338 new patent approvals, a decrease of 24.72% compared to the same period last year. Based on the company’s financial figures for the first half of 2025, the company invested 2.291 billion yuan in research and development during this period, representing a 10.1% increase compared to the previous year. According to big data analysis by Tianyancha, Wanhua Chemical Group Co., Ltd. has made investments in 76 companies in total and participated in 4,946 bidding projects ； Regarding property-related clues, there are 283 trademark records, 6,089 patent records, and 70 copyright records ； In addition, the company holds 957 administrative licenses.