Polynionic celluloses were preparated by alkalify and etherify of refining cotton.The degree of replacement of the polynionic cellulosesis was high.The radicals of replacement were distributed evenly.
In iron-removal from china stone,it has obtained satisfactory results with highyield of refined china clay and its product has reached the standards of Grade 1 china stone。
By way of “raising high carbon content and post blowing” as well as recarburization practice can the high carbon steel of fine quality be refined in the converter.