Method for synthesizing modified aminosulfonate superplasticizer from wastewater produced in K acid production process
A sulfamic acid salt and production process technology, applied in chemical instruments and methods, heating water/sewage treatment, extraction water/sewage treatment, etc., can solve problems such as difficult to reuse, complex components, etc., to improve service life, The effect of low dosage and high concrete strength
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Embodiment 1
[0028] Put 30g of organic matter extracted from K-acid wastewater (including sodium sulfate content: 13.2%), 18g of sodium p-aminobenzenesulfonate and 32g of phenol into a four-necked reaction flask, add 185g of water, and heat up while stirring. When the temperature rises to 45 At ℃, use 32% ionic membrane NaOH solution to adjust the pH value of the solution to 8.8, continue to heat up to 70℃, and start to drop 26.5g of 37% formaldehyde at this temperature. After the dropwise addition of formaldehyde is completed, the temperature is raised to 98°C, and the reaction is maintained for 8 hours. After the end of the heat preservation reaction, the pH value of the material is adjusted to 11.2 with 32% ionic membrane NaOH solution, and the reaction is carried out at 98°C for 4 hours, and the reaction ends. Cool down to room temperature and unload to obtain the modified sulfamate superplasticizer, numbered ANS-01.
Embodiment 2
[0030] 22g of organic matter extracted in the K-acid wastewater (wherein sodium sulfate content: 9.6%), 15g of sodium sulfanilate and 40g of cresol are put into a four-necked reaction flask, add 175g of water, heat up while stirring, when the temperature rises to At 45°C, use 32% ionic membrane NaOH solution to adjust the pH of the solution to 8.3, continue to heat up to 70°C, and start adding 30.5g of 37% formaldehyde dropwise at this temperature. After the dropwise addition of formaldehyde is completed, the temperature is raised to 98°C, and the reaction is maintained for 10 hours. After the end of the heat preservation reaction, the pH value of the material is adjusted to 11.5 with 32% ionic membrane NaOH solution, and the reaction is carried out at 98°C for 3 hours, and the reaction is completed. Cool down to room temperature and unload to obtain the modified sulfamate superplasticizer, numbered ANS-02.
Embodiment 3
[0032] 13g of organic matter extracted from K acid wastewater (including sodium sulfate content: 5.8%), 16g of organic matter extracted from G salt wastewater (including potassium sulfate content: 8.6%), 17g of sodium p-aminobenzenesulfonate, 40g of bisphenol A and high Active lignin 5g is put into the four-necked reaction flask, add water 210g, heat up while stirring, when the temperature rises to 45°C, use 32% ionic membrane NaOH solution to adjust the pH value of the solution to 7.7, continue to heat up to 70°C, and At this temperature, 34.6 g of 37% formaldehyde was added dropwise. After the dropwise addition of formaldehyde is completed, the temperature is raised to 100°C, and the reaction is maintained for 9 hours. After the end of the heat preservation reaction, the pH value of the material is adjusted to 11.5 with 32% ionic membrane NaOH solution, and the reaction is carried out at 100°C for 5 hours, and the reaction ends. Cool down to room temperature and unload to ob...
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