US studies new technologies to reduce pollution in the paper industry

According to overseas media reports, American scientists have recently developed a new technology that may reduce the paper industry's environmental pollution.
They first used a compound containing tungsten and molybdenum as a catalyst to top-process wood pulp, and then bleached wood pulp with oxygen. During the reaction, lignin is decomposed into carbon dioxide and water that are less harmful to the environment, and the catalyst itself can be reused. This technology solves the problem that oxygen cannot bleach wood pulp with low lignin concentration. The raw material for the traditional paper industry is wood pulp. Unmanaged wood pulp contains lignin that binds wood fibers together. At present, chlorine or chlorine dioxide is generally used as a lignin-removing bleach; however, the waste generated in the chlorine production process contains environmentally harmful dioxins; the second oxygenated chlorine gas generation process has high costs and high energy consumption. Disadvantages. Some experts believe that this technology can reduce environmental pollution, but further improvements must be made to achieve commercialization.