Traditional Culture Encyclopedia - Traditional culture - Activity grade of alumina silica gel
Activity grade of alumina silica gel
According to the different water content, neutral alumina can be divided into five active grades. Brockman defined grade I alumina as 12 h alumina calcined at 450℃, and grade 2, 3, 4 and 5 alumina as 1 alumina, with 3%.6%. 10%. 15% water added respectively.
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