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According to news from April 5, 2025, **information from the Intellectual Property Office shows that Sinopec Corporation has obtained a patent titled “A device for co-gasification of caprolactam waste liquid and coal,” with the approval announcement number CN 222715304 U; the application was filed in March 2024. The patent abstract indicates that this utility model discloses a device for the co-gasification of caprolactam waste liquid and coal, which includes a caprolactam waste liquid pretreatment unit and a co-gasification unit. The caprolactam waste liquid pretreatment unit comprises a extraction tower, a waste liquid preheater, a steam stripping tower, an ammonia removal mixer, an ammonia removal tower, a cooler, and a benzene extraction residue buffer tank, all connected in sequence ； The co-gasification unit includes a rod mill, a discharge trough, a coal slurry tank, and a gas flow bed water-cooled wall gasifier connected in sequence ； The benzene extraction residue buffer tank is connected to the rod mill via a caprolactam waste fluid pipeline; the rod mill is also connected to an additive pipeline, a fresh water pipeline, and a weighed coal feeder. By using the caprolactam waste liquid and coal co-gasification device of this application, efficient conversion of the caprolactam waste liquid is achieved to produce crude syngas; at the same time, the difficulty of wastewater treatment is reduced, environmentally friendly production is promoted, and social and economic benefits are increased. According to Tianyancha, Sinopec Corporation was established in 2000 and is located in Beijing; it is a company that is engaged in the processing of oil, coal, and other fuels. The registered capital of the enterprise is 121,739,689.893 million RMB, while the paid-in capital is 80,633,828.289 million RMB. According to big data analysis by Tianyancha, Sinopec Corporation has invested in 270 companies in total, participated in 5,000 bidding projects. In terms of property-related information, there are 45 trademark records and 5,000 patent records; additionally, the company holds 39 administrative licenses.