Environment-friendly VOCs adsorption buffer solution and preparation method thereof
A buffer solution and an environmentally friendly technology, applied in the field of environmentally friendly VOCs adsorption buffer and its preparation, can solve the problems of low absorption rate, achieve the effects of reducing pollution, reducing costs, and wide sources
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Embodiment 1
[0031] An environment-friendly VOCs adsorption buffer, which consists of 15-20% polyurethane solution and 80-85% propylene carbonate.
[0032] A kind of environmental protection VOCs adsorption buffer, its preparation method is:
[0033] S1: Add 150-250Kg of glycol solvent, 2.0-3.0kg of alcoholysis aid and 0.5-2.0kg of catalyst, 600-1000r / min, slowly add 250-350kg of polyurethane waste, and heat up under stirring to 160-180°C;
[0034] S2: S1 is kept at a constant temperature of 160-180°C, under nitrogen protection, and stirred at 600-800r / min for 2-4h until the hydroxyl value does not change;
[0035] S3: Cool S2 to 80-100°C, extract the upper polyurethane solution, if the polyurethane is polishing waste or foamed shoe material waste, the upper layer is the polyurethane solution, and the lower layer is the inorganic hard filler in the polishing material (for polishing) or inorganic filler for filling), if it is conventional polyurethane waste, the lower mixed solution is in...
Embodiment 2
[0047] An environment-friendly VOCs adsorption buffer, which consists of 15-20% polyurethane solution and 80-85% propylene carbonate.
[0048] A kind of environmental protection VOCs adsorption buffer, its preparation method is:
[0049] S1: Add 150-250Kg of glycol solvent, 2.0-3.0kg of alcoholysis aid and 0.5-2.0kg of catalyst, 600-1000r / min, slowly add 250-350kg of polyurethane waste, and heat up under stirring to 160-180°C;
[0050] S2: S1 is kept at a constant temperature of 160-180°C, under nitrogen protection, and stirred at 600-800r / min for 2-4h until the hydroxyl value does not change;
[0051] S3: Cool S2 to 80-100°C, extract the upper polyurethane solution, if the polyurethane is polishing waste or foamed shoe material waste, the upper layer is the polyurethane solution, and the lower layer is the inorganic hard filler in the polishing material (for polishing) or inorganic filler for filling), if it is conventional polyurethane waste, the lower mixed solution is in...
Embodiment 3
[0061] Compared with embodiment 1#, change the ratio of polyurethane solution and propylene carbonate, other content is identical with embodiment 1#, comparative example is 6#, and wherein polyurethane solution is 10%, and propylene carbonate is 90%; Comparative example is that 7# is: polyurethane solution is 30%, propylene carbonate is 70%, to embodiment 6# and 7#, with embodiment 1#, the VOCs gas of the same kind in table 1 is adsorbed, and its The adsorption rate is less than 80%, and the concentration of the gas outlet is very large, so direct discharge cannot be realized. This is because the ratio of polyurethane solution to propylene carbonate affects the adsorption efficiency. If the polyurethane solution is too little or too much, the adsorption solution is easy to overfill. Saturation reduces the adsorption rate.
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