Method for preparing low-molecular-weight sodium polyacrylate dispersing agent from butyl acrylate production wastewater
A technology of butyl acrylate and sodium polyacrylate, applied in chemical instruments and methods, water/sewage treatment, natural water treatment, etc., can solve the problems of complex process flow, complex process, difficult operation, etc., and achieve simple process flow, The effect of improving reaction efficiency and easy operation and control
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Embodiment 1
[0047] A method of preparing a low molecular weight polyacrylate dispersant using acrylate production wastewater, including the following steps:
[0048] Step (1), adsorbing addition of heterogeneous precursors: 1000 ml of butyl acrylate production waste water, pH is 8.32, water temperature 45 degrees Celsius, analysis to obtain COD in wastewater Cr The content was 51253 mg / L, the TDS content was 26730 mg / L, and the conductivity was 51560 μs / cm, and the chromaticity was 200 times.
[0049] Step (2), the adsorbent regeneration: adsorbed by 200 megaceae, additional hetero-decolorization pretreatment, diatomal dirt addition is 1.5%, and the adsorption divide the reaction time is 30 minutes, filtered, resulting in chrominance Production of waste water for 7 times of butyl acrylate.
[0050] Step (3), membrane concentrated: The filtered acrylate was delivered to the reverse osmosis membrane filter, and the film was concentrated to an acrylate concentration of 18%, and 710 ml of f...
Embodiment 2
[0054] Example 2 The same technical principles were applied to the first embodiment, and the difference is that specifically:
[0055] In step (1), adsorption is prepared by adsorption: Take 1000 mL of butyl acrylate production wastewater, pH is 8.32, water temperature 45 degrees Celsius, analysis to obtain COD in wastewater Cr The content was 51253 mg / L, the TDS content was 26730 mg / L, and the conductivity was 51560 μs / cm, and the chromaticity was 200 times.
[0056] In step (2), the adsorbent regenerates: adsorbed by 200 powder activated carbon, the powder activated carbon supply is 5 g, and the adsorption is completed after 10 minutes, and the chromaticity is 5. Date acrylate production waste water.
[0057] In step (3), the film was concentrated: the filtered acrylate production wastewater was delivered to the reverse osmosis membrane filter, the film was concentrated to a sodium acrylate concentration of 15%, and the film was filtered 660 ml, and the concentrate was 340...
Embodiment 3
[0061] Example 3 The same technical principles were applied to the first embodiment, and the difference is that specifically:
[0062] In step (1), adsorption is prepared in addition to the mixture of 5000 ml of butyl acrylate production waste water, the pH is 8.36, the water temperature is 35 degrees Celsius, and the analysis is obtained in wastewater COD Cr The content was 126720 mg / L, TDS content of 98740 mg / L, electrical conductivity 107320 μs / cm, and the chromaticity is 500 times.
[0063] In step (2), the adsorbent regenerates: adsorbing the adsorption of 3 mesh powder activated carbon, 50 g of the powder activated carbon supply, adsorbed by 15 minutes after adsorption, and the chromaticity is 10 Date acrylate production waste water.
[0064] In step (3), the film was concentrated: the filtered acrylate production wastewater was pumped to the reverse osmosis membrane filter, and the film was concentrated to a sodium acrylate. The film was filtered by 1700 ml, and the c...
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