Polycarbonate process wastewater treatment method

Abstract

The invention discloses a polycarbonate process wastewater treatment method using a two-stage countercurrent continuous extraction system. The two-stage countercurrent continuous extraction system comprises a mixing kettle, a peristaltic pump, a centrifuge, an evaporator, a mixing kettle, a wastewater storage pot and a resin adsorption tower. A solvent used for synthesizing polycarbonate is used as an extractant, a feeding volume ratio of the extractant to wastewater is 0.08-0.1:1, and a feeding mass-to-volume ratio of resin to wastewater is 0.025:1. The resin used for adsorption is polystyrene resin. The method has the advantages of recycling of phenol substances in wastewater, less consumption of the extractant, low wastewater treatment cost and easy industrial amplification. The recovered phenol substances can be used for synthesizing polycarbonate, and treated brine can be directly discharged, or can be discharged to high salt environment, or can be used for the preparation of sodium hydroxide, chlorine and the like through the electrolysis of the chlorine-alkali industry.

Description

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AI Technical Summary

Benefits of technology

This patented technology allows for effective removal of residual chemical from industrial processes that produce large amounts of water containing various compounds such as phthalates (PCA) which may harm human health if released without proper handling procedures. By extracting these materials with an organophosphorus solvent called diphenylamidonium hydrochloride solution before disposal, this new approach reduces environmental concerns associated with excessive use of traditional methods like biological remedy techniques. Overall, this technique provides technical benefits over existing technologies while reducing costs and making them more efficient at processing heavy waters.

Problems solved by technology

Invention describes how to prepare special types of resins called PCA with improved performance compared to existing ones like acrylic acid ester copolyetherimides or vinylenetaphthoquinone monofluorescephilics. These new type resins improve their overall technical effects over current technologies due to its unique structure and low content of harmful ingredients found within these resins. They also allow for easy disposal without generating hazardous solid effluents. Additionally, they may help reduce environmental pollution caused by various industries involved in manufacturing processes. Overall, these novel techniques aim to solve the challenges associated with producing pure and usable compounds through chemistry reactions involving decomposition of organisms into smaller molecules while minimizing waste generation.

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