Unsymmetrical dimethylhydrazine wastewater treatment method
A treatment method, the technology of unsymmetrical dimethylhydrazine, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem that the decomposition reaction cannot be completely carried out, toxic intermediate decomposition products, treatment Poor effect and other issues
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Embodiment 1
[0024] Take 50 mL of unsymmetrical dimethylhydrazine aqueous solution (mass concentration is 0.6%), add 1 mL of formaldehyde with a mass concentration of 40%, and react at 35°C for 1 hour, then add 10 g of coal-based conventional powdered activated carbon (commercially available) to the solution to absorb After 1h, filter, and the content of unsymmetrical dimethylhydrazine in the filtrate is 19 mg / L.
[0025] Control experiment: take 50mL of unsymmetrical dimethylhydrazine aqueous solution (mass concentration 0.6%), absorb with 10g of coal-based conventional powdered activated carbon for 2h, filter, and the mass concentration of unsymmetrical dimethylhydrazine in the filtrate is 0.1%. It can be seen from the comparison experiment that the effect of simply adsorbing by activated carbon is obviously poor.
Embodiment 2
[0027] Take 50mL of unsymmetrical dimethylhydrazine aqueous solution (mass concentration is 0.1%), add 1mL of furfural, react at 20°C for 1h, a brownish-yellow solid precipitates out of the solution, centrifuge, then add 2g of coal-based conventional powdered activated carbon to the solution for adsorption for 0.5h, After filtration, a colorless and clear filtrate was obtained. The content of unsymmetrical dimethylhydrazine in the filtrate was detected to be 7.5 mg / L.
[0028] Control experiment: take 50mL of unsymmetrical dimethylhydrazine aqueous solution (mass concentration 0.1%), absorb with 2g of coal-based conventional powdered activated carbon for 0.5h, filter, and the mass concentration of unsymmetrical dimethylhydrazine in the filtrate is 0.03%.
Embodiment 3
[0030] Be that the acetaldehyde aqueous solution of 40% replaces the furfural in embodiment 2 with 0.2mL mass concentration, other is with embodiment 2, and the unsymmetrical dimethylhydrazine content is 20mg / L in the final filtrate.
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