Method for treating butyl acrylate production tail water and extracting sodium acrylate frombutyl acrylate production tail water
A technology of butyl acrylate and sodium acrylate, which is applied in the fields of filtration treatment, water/sewage treatment, water treatment parameter control, etc., can solve the problems of high cost and difficulty in producing tail water of butyl acrylate, and achieves low cost and simple process. Effect
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Embodiment 1
[0040] Take 500g of butyl acrylate to produce tail water, and the initial indicators of butyl acrylate to produce tail water are: sodium acrylate content 13.20%, COD 137580mg / L, pH value 8.03, chromaticity value 432.
[0041] Add 37.5g of powdered activated carbon to the tail water produced by butyl acrylate, stir at a medium speed for 30 minutes, and filter to obtain the filtrate; evaporate and concentrate the filtrate under vacuum at 67°C, and when the concentration ratio reaches 2.5, collect the evaporative condensate and concentrate; The concentrated solution was transferred to a vacuum drying oven, and dried at 105° C. for 24 hours to obtain solid sodium acrylate, and the evaporated condensate was the treated butyl acrylate tail water.
[0042] The treated butyl acrylate production tail water has a COD concentration of 63mg / L, a chromaticity of 6, and a COD removal rate of 99.95%, which can be collected into pipes or directly discharged. The solid sodium acrylate obtained...
Embodiment 2
[0044] Take 1000g of butyl acrylate to produce tail water, and the initial indicators of butyl acrylate to produce tail water are: sodium acrylate content 13.82%, COD 143450mg / L, pH value 8.11, chromaticity value 444.
[0045] Add 100g of powdered activated carbon to the tail water produced by butyl acrylate, stir at a medium speed for 30 minutes, and filter to obtain the filtrate; evaporate and concentrate the filtrate under vacuum at 70°C, and when the concentration ratio reaches 2.7, collect the evaporative condensate and concentrate; The liquid was transferred to a vacuum drying oven, and dried at 105° C. for 24 hours to obtain a solid sodium acrylate, and the evaporated condensate was the treated butyl acrylate tail water.
[0046] The treated butyl acrylate production tail water has a COD concentration of 54mg / L, a chromaticity of 4, and a COD removal rate of 99.96%, which can be collected into pipes or directly discharged. The solid sodium acrylate obtained by concentra...
Embodiment 3
[0048] Take 1000g of butyl acrylate to produce tail water, and the initial indicators of butyl acrylate to produce tail water are: sodium acrylate content 13.82%, COD 143450mg / L, pH value 8.11, chromaticity value 444.
[0049]Add 100g of resin to the tail water of butyl acrylate production, stir at a medium speed for 30min, filter to obtain a filtrate, add 50g of powdered activated carbon to the filtrate, stir at a medium speed for 30min, and filter to obtain a secondary filtrate; Evaporate and concentrate at 72°C. When the concentration ratio reaches 2.7, collect the evaporated condensate and concentrated liquid; transfer the concentrated liquid to a vacuum drying oven and dry at 105°C for 24 hours to obtain a solid of sodium acrylate, and the evaporated condensed liquid is the processed butyl acrylate production tail water.
[0050] The treated butyl acrylate production tail water has a COD concentration of 76mg / L, a chromaticity of 6, and a COD removal rate of 99.95%, which...
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