Solvent Distillation Plant

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BIODEGRADABLE PLASTIC INDUSTRY

Solvent Distillation Plant

Design flow rate: 4.500 Kg/h

Feed Product: raw 1-4 Butanediol (86,5% purity)

Final Product: 1-4 Butanediol (99,95% purity)

3 columns continuous distillation plant + 1 Thin Film Evaporator 30m2

Problem

It was necessary to treat a complex organic mixture containing water, light and heavy volatile compounds, and 1,4-Butanediol (BDO), separating the main product from contaminants without degrading it and without interruptions between the different distillation stages. The presence of azeotropes and volatile components required vacuum operation to ensure BDO efficiency and quality.

Solution

A multi-stage distillation unit was implemented integrating dehydration, heavy component removal, residue recovery, and final BDO fractionation. The columns and the thin-film evaporator allow water and impurities to be removed, recover the residual product from heavy fractions, and produce BDO purified to 99.97%.The vacuum system and off-gas condensation ensure continuous operation, separation efficiency, and full compliance with quality requirements.

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