Heterogeneous catalytic oxidation catalyst, preparation method and method for treating phenolic wastewater

A heterogeneous catalytic oxidation and catalyst technology, applied in the direction of oxidation water/sewage treatment, organic compound/hydride/coordination complex catalyst, physical/chemical process catalyst, etc., can solve the problem of high cost, achieve low cost, avoid Metal loss, no secondary pollution effect
CN113304781AActive Publication Date: 2021-08-27WANHUA CHEM GRP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
WANHUA CHEM GRP CO LTD
Publication Date
2021-08-27

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Abstract

The invention discloses a heterogeneous catalytic oxidation catalyst, a preparation method and a method for treating phenolic wastewater. The catalyst comprises the following components: nano-iron modified semi-coke serving as a carrier, and loaded organic acid complexed metal copper and / or rare earth metal cerium serving as an active component. The catalyst prepared by the invention has the characteristics of high catalytic efficiency, small metal loss amount, good stability and the like, and is beneficial to converting various phenols in phenol-containing wastewater into small molecular acids, improving the biochemical property of the wastewater, removing ammonia nitrogen in the wastewater and reducing the wastewater treatment cost.
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Description

technical field

[0001] The invention relates to the technical field of waste water treatment, in particular to a heterogeneous catalytic oxidation catalyst, a preparation method, and a method for using the same in dephenolization and ammonia removal of DNT waste water. Background technique

[0002] The TDI (toluene diisocyanate) plant includes DNT (dinitrotoluene) hydrogenation to TDA (toluene diamine), TDA phosgenation to TDI and other processes. The wastewater generated by the DNT process mainly contains DNT, dinitrocresol, and ammonia nitrogen. etc. DNT wastewater treatment technology involves few schemes, and currently it is mainly based on incineration or pretreatment and regeneration treatment technology. However, conventional pretreatment technologies, such as the traditional Fenton treatment technology, will produce a large amount of iron sludge, which is usually hazardous solid waste, and the treatment cost is relatively high. Using the heterogeneous catalytic oxid...

Claims

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