Two Pressure-swing Distillation
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Two Pressure-swing Distillation
HCL gas can be recovered from heavily diluted solutions. using pressure-swing distillation can recover HCl gas from dilute hydrochloric acid solutions. At high
pressure, the azeotropic HCl concentration is low (16-18%). At low pressure, it rises to 22-24%. This makes it possible to remove water by distillation in a column operated at low pressure. The concentrate in the bottom of this column is pumped into another column operated at high pressure, where HCl gas is distilled. The azeotropic bottom product flows back into the low-pressure column.
Capacity and available sizes
The distillation systems can be designed for a capacity of 3 to 75 t/d 100% HCL per system. The equipment sizes are matched to the customer's needs.
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