Elimination of the \"acid-base alternating bed production process\" – Green and safe transformation project for hydrogen peroxide production at Hubei Sanning Chemical’s nylon subsidiary

Thread Content

The hydrogen peroxide production facility at the Nylon Branch of Hubei Sanning Chemical Co., Ltd. currently uses the **prohibited ‘acid-base alternating bed production process’; the company plans to carry out upgrades and renovations for this facility. For the upgrade and renovation, a fully acidic fluidized-bed system was adopted to replace more than 170 pieces of equipment such as hydrogenation towers and oxidation towers from the hydrogen peroxide fixed-bed production line; in addition, over 190 sets of new reaction and heat-exchange equipment, as well as pumps and other devices, including hydrogenation towers, oxidation towers, hydrogen circulation compressors, and coolers, were purchased. The production unit mainly includes processes such as working fluid preparation, hydrogenation, oxidation, and extraction purification. The hydrogen for the project comes from Sanning Shibaoshan Company and is transported to the project site via pipelines. The continuous hydrogen consumption for this project is 35,062 m3/h, with an annual consumption of 2.8×108 m3/year (2,496.45 tons/year). Following this renovation, the hydrogen consumption has decreased due to improved hydrogenation efficiency, and the hydrogen supply provided by Sanning Shibaoshan Company meets the production requirements of this project. Upon completion, the project will have an annual production capacity of 150,000 tons of 27.5% hydrogen peroxide. All the hydrogen peroxide produced is used for the production of 100,000 tons per year of caprolactam within the factory premises. The project is located within the existing factory complex of the Nylon Branch of Hubei Sanning Chemical Co., Ltd. The project investment is 275 million yuan. After the project is completed, the original hydrogen peroxide plant will be demolished. In January 2026, the Yichang Ecology and Environment Bureau published the draft environmental impact assessment report for the project aimed at making the hydrogen peroxide production line of Hubei Sanning Chemical Co., Ltd.’s nylon division more environmentally friendly and safer.