Double function resin process for treating toluidine-containing effluent
A dual-functional resin and toluidine technology, applied in the field of toluidine-containing wastewater treatment, can solve the problems of low adsorption capacity, poor adsorption selectivity, high regeneration cost, etc., achieve high adsorption removal rate, high treatment efficiency, and realize the effect of recovery
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[0011] Pass toluidine-containing wastewater through ultra-high cross-linked weak base anion exchange resin (bifunctional resin) or macroporous adsorption resin filled with adsorption and ion exchange functions at a temperature of 0-40°C and a flow rate of 0.5-8BV / h After the resin in the processing device is adsorbed and saturated, use 1-5% dilute sulfuric acid or 1-10% dilute hydrochloric acid as a desorbent to regenerate the resin. The desorbent flow rate is 0.2-3BV / h, and the regenerated high concentration The toluidine solution reclaims the toluidine product, and the low-concentration toluidine solution is used to prepare the next batch of desorbent for recycling.
[0012] The high-concentration desorption liquid uses 5-40% sodium hydroxide solution or 10-30% ammonia water to adjust the pH value to 7-11, and the obtained crude toluidine is subjected to a rectification process to obtain a toluidine product.
[0013] Example 1, 2, 3 adopt the ultrahigh cross-linked weak base...
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