Polyvinyl alcohol was first developed by German chemists W.0. Herrmann and W.W. Hachnel in 1924, because it can carry out typical polyol chemical reactions and pass. Insoluble treatment makes it denatured and has different functional effects, resulting in a series of synthesisMaterials are widely used in industrial and agricultural production and medical applications. Polyvinyl alcohol in 1926. Industrial production is now, and the product achieved large-scale industrialization in the 1950s. The process route for producing polyvinyl alcohol is divided into two types according to raw materials, ethylene method and acetylene method.
At present, a variety of new processes, new technologies, new materials, and new equipment are emerging in an endless stream, such as new catalysts and their carriers, new tray technology, changing the internal structure of the reactor, changing operating conditions and methods, and comprehensive utilization of the three wastes. Reasonable use of these new technologies can produce obvious economic benefits.