Novel application of polytetrafluoroethylene material
A polytetrafluoroethylene and lining technology, which is applied in the direction of improving process efficiency, can solve the problems of severe corrosion, strong corrosion of arsenic trichloride, fear of external forces, etc.
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[0013] The heating kettle made of polytetrafluoroethylene with a purity of 99.99% and a thickness of 2-6 mm is lined on the stainless steel shell. The continuous working time at 150 ° C: 3500 hours; Tested by Shanghai Silicate Testing Center of Academy of Sciences, the total amount of impurities is 0.493ppm (1ppm = one millionth of a gram), and the quality grade is 6N (ie 99.9999%). After 240 hours, the quality is improved to 7N (ie 99.99999%, the product quality 7N is the highest in the world), and the total amount of impurities is reduced to 0.1ppm and below.
[0014] The above experiments prove that using polytetrafluoroethylene with a purity of more than 99.99% and a thickness of 0.2-10 mm as a lining can bring unexpected commercial effects, which is a revolutionary progress in this field and provides a new method for the production of high-purity arsenic. An industrial heating production equipment.
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