Abstract: Based on the further study on the disproportionation process and the distillation principle of divide wall column (DWC),two types of DWC processes are developed.Both processes can reduce energy consumption and device investment as possible.Data show that these two processes consume 40% less steam than the original process,and 20% less steam than the thermal coupling process.They also consume less cooling water.In addition,they need less distillation tower,reboiler and condenser,and cut down the investment in devices.
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