A method for recovery and treatment of formazan and ethanol in carboxymethyl cellulose flash tail gas
A carboxymethyl cellulose, recycling technology, applied in climate sustainability, separation/purification of hydroxyl compounds, organic chemistry, etc., can solve problems such as corrosiveness of production equipment, avoid cooling water, and achieve high capture efficiency , the effect of easy separation and recycling
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Embodiment 1
[0050] Carboxymethyl cellulose flash tail gas flow rate 12050kg / h, mass percentage composition: 0.5% methanol, 0.7% ethanol, 98.8% other gases, temperature is 40°C, capture agent is 1-butyl-3-methylimidazole hexa The mixture of fluorophosphate and water is composed of 80% 1-butyl-3-methylimidazolium hexafluorophosphate, 20% water, the flow rate is 2100kg / h, the temperature is 32°C, and the capture tower is 25 plates, normal pressure operation, the capture tower is a plate tower, the capture rate of methanol is 99.98%, and the capture rate of ethanol is 99.49%. The capture agent regeneration tower is a plate tower with a theoretical plate number of 30, operated under normal pressure, with a reflux ratio of 2, and the feed position is the 11th plate. A. The ethanol regeneration tower is a plate tower with a theoretical plate number of 35, operated at normal pressure, with a reflux ratio of 5, and the feed position is the 16th plate. The purity of methanol is 99.8%, and the purit...
Embodiment 2
[0052] Carboxymethyl cellulose flash tail gas flow rate 13120.4kg / h, mass percentage composition: methanol 0.4%, ethanol 0.6%, other gases 99%, temperature is 51°C, capture agent is 1-butyl-3-methylimidazole The mixture of hexafluorophosphate and water, its mass percentage is: 1-butyl-3-methylimidazolium hexafluorophosphate 70%, water 30%, the flow rate is 2550kg / h, the temperature is 32℃, the capture tower It is 40 plates, operated under atmospheric pressure, and the capture tower is a plate tower, the capture rate of methanol is 99.98%, and the capture rate of ethanol is 99.44%. The capture agent regeneration tower is a plate tower with a theoretical plate number of 30, operated under normal pressure, with a reflux ratio of 3, and the feeding position is the 12th plate. Pressure operation, the reflux ratio is 5, the feeding position is the 18th plate, the purity of methanol is 99.9%, the purity of ethanol is 99.65%, the recovery rate of methanol is 99.56%, and the recovery r...
Embodiment 3
[0054] Carboxymethyl cellulose flash tail gas flow rate 10042.4kg / h, mass percentage composition: methanol 0.6%, ethanol 0.7%, other gases 98.7%, temperature is 32°C, capture agent is N-ethylpyridine tetrafluoroborate The mixture of water and water, its mass percentage is: N-ethylpyridine tetrafluoroborate 70%, water 30%, the flow rate is 1601.4kg / h, the temperature is 27 ° C, the capture tower is 14 plates, normal pressure Operation, the capture tower is a plate tower, the capture rate of methanol is 99.83%, and the capture rate of ethanol is 99.03%. The capture agent regeneration tower is a plate tower with a theoretical plate number of 30, operated under normal pressure, with a reflux ratio of 2.5, and the feeding position is the 13th plate. Pressure operation, the reflux ratio is 4, the feeding position is the 16th plate, the purity of methanol is 99.7%, the purity of ethanol is 99.45%, the recovery rate of methanol is 99.58%, and the recovery rate of ethanol is 99.02%.
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