Resourceful treatment method of 1, 2, 3, 6-tetrahydrophthalimide production wastewater

The invention discloses a resourceful treatment method of 1, 2, 3, 6-tetrahydrophthalimide production wastewater, which comprises the following steps: adding acid into 1, 2, 3, 6-tetrahydrophthalimide crystallization mother liquor for acidification, mixing the acidified crystallization mother liquor...

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Hauptverfasser: LI ZHIQING, LIANG QIAN, XU JIABA, CHENG YUANGANG, WANG ZONGHAO, LING XIAOGUANG, WANG FENG, WEI JIKUAN, ZHAO LINGSHU
Format: Patent
Sprache:chi ; eng
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Zusammenfassung:The invention discloses a resourceful treatment method of 1, 2, 3, 6-tetrahydrophthalimide production wastewater, which comprises the following steps: adding acid into 1, 2, 3, 6-tetrahydrophthalimide crystallization mother liquor for acidification, mixing the acidified crystallization mother liquor with an extraction agent, extracting, separating liquid, adding water into a water phase for alkalization, enabling the alkalized water phase to pass through a resin column, and carrying out resourceful treatment on the 1, 2, 3, 6-tetrahydrophthalimide production wastewater to obtain the 1, 2, 3, 6-tetrahydrophthalimide production wastewater. 2, 3, 4, 6-tetrahydrophthalimide is added for enrichment; and eluting the resin column with an acid, adjusting the pH value of the obtained desorption solution to be alkaline, crystallizing, and filtering to obtain the 1, 2, 3, 6-tetrahydrophthalimide. The existing form of the 1, 2, 3, 6-tetrahydrophthalimide in the wastewater is changed through acid-base adjustment, purifica