Page 212 - Chemical and process design handbook
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Speight_Part II_C  11/7/01  3:08 PM  Page 2.152









                                      CELLULOSE












                  Cellulose is the primary substance of which the walls of vegetable cells are
                  constructed and is largely composed of glucose residues. It may be
                  obtained from wood or derived in very high purity from cotton fibers,
                  which are about 92% pure cellulose.
                    The important fiber rayon is regenerated cellulose from wood pulp that
                  is in a form more easily spun into fibers. Cellophane film is regenerated
                  cellulose made into film. One method of regeneration is formation of xan-
                  thate groups from selected hydroxyl groups of cellulose, followed by
                  hydrolysis back to hydroxy groups.
                    Cellulose acetate and triacetate may be used as plastics or spun into
                  fibers for textiles. They are made by the reaction of cellulose with acetic
                  anhydride.

                    See Cellulose Acetate, Cellulose Nitrate.































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