Concentration enhancement of fluorosilicic acid
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I’m seeking help from fellow sailors: how can the concentration of 20% fluorosilicic acid be increased to 40%?
Use cyclic absorption; increase the heat exchanger when the temperature is high. Equipment made of ordinary materials is prone to leakage, so graphite equipment coated with resin should be used, but care must be taken to avoid the problem of silica precipitation blocking the pipes
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Cyclic absorption, but be sure to pay attention to the HF content