Effective utilization method of sulfur dioxide in a kind of waste gas
A sulfur dioxide and exhaust gas technology, applied in chemical instruments and methods, separation methods, organic chemistry, etc., can solve the problems of ineffective recycling, difficult to synthesize compounds, low removal efficiency, etc., achieve high boiling point, low cost, and fast absorption speed effect
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Embodiment 1
[0023] Under normal temperature and pressure, prepare a 1,4-diazabicyclo[2.2.2]octane / N-methylpyrrolidone mixed solution and place it in a 50mL centrifuge tube, in which 1,4-diazabicyclo[2.2. 2] The mass fraction of octane is 20%, SO 2 Controlled by a gas mass flow controller into a centrifuge tube, reacted for 10min, centrifuged, washed and dried to obtain a white solid; 2 The content can reach SO 2 Absorb 96.0% of the total amount.
[0024] Take 0.5mol of 1,4-diazabicyclo[2.2.2]octane-sulfur dioxide absorption product, place in a 50mL round bottom flask, add 0.5mol phenylhydrazine and 0.5mol morpholine, add 0.05g copper nitrate as Catalyst, 5g of acetonitrile as a solvent; the whole device was placed in a magnetically stirred water bath, and a dry air balloon was placed on the mouth of the bottle, the reaction temperature was 80°C, and the reaction time was 10h; the product 4-phenylsulfonylmorpholine was obtained by using a preparative chromatographic column, The yield ca...
Embodiment 2
[0026] Under normal temperature and pressure, prepare tetramethylethylenediamine / liquid paraffin mixed solution and place it in a 50mL centrifuge tube, wherein the mass fraction of tetramethylethylenediamine is 25%, SO 2 The gas is controlled by a mass flow controller to flow into a centrifuge tube, reacted for 30 minutes, centrifuged, washed and dried to obtain a white powdery solid. SO in the solid phase product in the liquid-solid two-phase formed in the present embodiment 2 The content can reach SO 2 The total absorption is 93.5%.
[0027] Take 0.5mol of tetramethylethylenediamine-sulfur dioxide absorption product, put it in a 50mL round bottom flask, add 0.25mol 4-methylphenylhydrazine and 0.25mol morpholine, add 0.05g cuprous bromide as catalyst, 5g acetonitrile As a solvent; the whole device is placed in a magnetic stirring water bath, and a dry air balloon is put on the mouth of the bottle, the reaction temperature is 60°C, and the reaction time is 12h; The calculat...
Embodiment 3
[0029] Under normal temperature and pressure, prepare N,N,N',N'-tetramethyl-1,4-phenylenediamine / diethylene glycol dimethyl ether mixed solution and place it in a 50mL centrifuge tube, where N,N,N The mass fraction of ',N'-tetramethyl-1,4-phenylenediamine is 20%, SO 2 Controlled by a gas mass flow controller into a centrifuge tube, reacted for 5min, centrifuged, washed and dried to obtain an orange-red granular solid; 2 The content can reach SO 2 The total absorption is 95.2%.
[0030] Take 1mol of N,N,N',N'-tetramethyl-1,4-phenylenediamine-sulfur dioxide absorption product, put it in a 50mL round bottom flask, add 0.5mol 4-nitrophenylhydrazine and 0.5mol pyrrole , add 0.05g cuprous chloride as a catalyst, 5g acetonitrile as a solvent; put the whole device into a magnetic stirring water bath, put a dry air balloon on the mouth of the bottle, the reaction temperature is 70°C, and the reaction time is 10h; the product is obtained by using a preparative chromatographic column ...
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