Comprehensive treatment method for high-concentration sodium sulfate wastewater generated in dicumyl peroxide production

• Main Authors: YAO YUELIANG, ZHANG PINGYI, SUN JIEYANG, MAO HAIFANG, HUO HAOHUA, WANG CHAOYANG
• Format: Patent
• Language: English
• Published: 01.07.2015
• Subjects: CHEMISTRY; COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM; INORGANIC CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention discloses a comprehensive treatment method for high-concentration sodium sulfate wastewater generated in dicumyl peroxide production. The comprehensive treatment method comprises the following steps: adding macroporous resin into a container, and adding the high-concentration sodium sulfate wastewater into the container, and adsorbing for 30-90 minutes; cooling the high-concentration sodium sulfate wastewater adsorbed by the macroporous resin to -5 DEG C to 10 DEG C, and filtering; washing the obtained filter cake with icy water, and performing pressure-reduced evaporation at the temperature of 50-110 DEG C to remove sodium sulfate decahydrate crystal moisture, thereby obtaining anhydrous sodium sulfate; combining the obtained filtrate, the washing water and distillation condensed water to dissolve sodium sulfide or sodium sulfite so that sodium sulfide or sodium sulfite can be used in production of dicumyl peroxide, thus finishing the comprehensive treatment on the high-concentration sodium sulfate wastewater. By adopting the comprehensive treatment method, the high-concentration sodium sulfate wastewater generated in dicumyl peroxide production can be effectively treated, anhydrous sodium sulfate can be reduced, and moreover 75% or above of water can be recycled.