Reduce solvent usage in batch distillation

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In simple takeover distillations to switch process solvents, operating at a constant level can reduce the loss of the replacement solvent to the distillate by 50-70%.

Batch distillation is commonly applied to switch solvents in a production process. Solvents might be exchanged to crystallize the final product or to conduct a subsequent reaction. The most common procedure usually imitates what was easiest for the chemist who developed the process in the lab. First, the batch is boiled down to remove much of the original solvent. Next, the replacement solvent is charged to the batch. Then, the batch is...