PPG has developed the Tephram~R non-asbestos diaphragm for use in diaphragm electrolysis cells for the production of chlorine and caustic soda (NaOH).The Tephram diaphragm uses non-hazardous Teflon~R fluoropolymer materials to replace asbestos.The Tephram diaphragm technology offers advantages in decreasing the complexity in handling raw materials (both asbestos itself and the corrosive chemicals used in asbestos diaphragm deposition) as well as in the disposal of asbestos materials at the end of their useful lives.Tephram diaphragms are easier to handle safely and are more environmentally friendly than asbestos diaphragms,and last much longer than asbestos diaphragms.At PPG's Lake Charles chlor-alkali complex an advantage in energy efficiency has been demonstrated.
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