A method for treating wastewater from the production of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide

By combining modified resin adsorption with triple-effect evaporation, oxidative degradation, and flocculation sedimentation, the problems of equipment scaling and low treatment efficiency caused by HPPA in DOPO production wastewater were solved, achieving efficient and stable wastewater treatment results.

CN120573900BActive Publication Date: 2026-06-09SHOUGUANG WEIDONG CHENGUAN CHEM CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHOUGUANG WEIDONG CHENGUAN CHEM CO LTD
Filing Date
2025-07-10
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

In the production process of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, the wastewater generated contains HPPA and its structural analogues, which cause scaling, corrosion and low treatment efficiency in the equipment. Existing adsorption materials cannot effectively recover HPPA, thus affecting the wastewater treatment effect.

Method used

The method employs modified resin adsorption, triple-effect horizontal flow evaporation of the resin adsorbate, oxidative degradation, and flocculation sedimentation. By using modified resin to specifically adsorb HPPA and its structural analogues, combined with triple-effect evaporation and oxidative degradation, efficient recovery and stable treatment of wastewater can be achieved.

Benefits of technology

It achieves targeted adsorption and recovery of HPPA and its structural analogues, reducing the COD, total phosphorus, total salt and ammonia nitrogen content of wastewater, meeting the discharge requirements of sewage treatment plants, and improving the stability and efficiency of wastewater treatment.

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Abstract

The application provides a 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide production wastewater treatment method and belongs to the field of DOPO wastewater treatment.The 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide production wastewater treatment method is composed of the following steps: resin adsorption, three-effect advection evaporation, oxidative degradation and flocculation precipitation.The 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide production wastewater treatment method can recover HPPA and its structural analogues in the DOPO production wastewater, effectively avoid the adverse effects of HPPA and its structural analogues in the production wastewater on the production wastewater treatment effect, and realize efficient and stable treatment of the 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide production wastewater.
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Citation Information

Patent Citations

  • Process for recovering wastewater in production of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and derivatives thereof

    CN104086029A

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