Treatment method of triglycidyl isocyanurate production waste liquid
A technology of glycidyl ester and tri-isocyanurate, which is applied in the field of treatment of waste liquid produced by triglycidyl isocyanurate, can solve the problems that waste liquid cannot be directly discharged, and there is no research on methanol waste liquid treatment, so as to reduce treatment Cost, reduced power consumption, improved distillation efficiency
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Embodiment 1
[0070] like figure 1 As shown, under stirring conditions, in 1LTGIC production wastewater (COD value of 1.85 × 10 5 mg / L, inorganic salt content of 3.7 wt%) was added dropwise with a sulfuric acid solution with a mass concentration of 65% to pH 2, stirred for 2 h in a water bath at 50 °C for acid hydrolysis, followed by intermittent vacuum distillation (so The intermittent vacuum distillation is one-stage vacuum distillation, and the conditions are 43kPa, 75°C, 7h) to obtain 0.6L of condensed water (COD value is 5230mg / L) and 0.375L of light yellow oil containing industrial salt;
[0071] After heating the 0.6L condensed water to 40°C, slowly add 50mL of chlorine dioxide solution with a mass concentration of 1.0% dropwise, continue to keep stirring for 2h, and obtain water with a COD value of 790mg / L (the water can be recycled and reused). or direct discharge);
[0072] The light yellow oil containing the industrial salt was mixed with 1 L of methanol for crystallization, fi...
Embodiment 2
[0076] like figure 1 As shown, under stirring conditions, in 10LTGIC production wastewater (COD value of 1.85 × 10 5 mg / L, the inorganic salt content is 3.7 wt%), add dropwise a sulfuric acid solution with a mass concentration of 65% to pH 2, stir for 1 h in a water bath at 70 °C for acidolysis, and conduct intermittent vacuum distillation (so The intermittent vacuum distillation was one-stage vacuum distillation, and the conditions were 45kPa, 85°C, 7h) to obtain 6.4L of condensed water (COD value was 7861mg / L) and 3.35L of light yellow oil containing industrial salt;
[0077] After heating the 6.4L of condensed water to 40°C, slowly add 0.8L of chlorine dioxide solution with a mass concentration of 1.0% dropwise, and continue to keep stirring for 2.5h to obtain water with a COD value of 920mg / L (the water can be recycled. reuse or direct discharge);
[0078] The light yellow oily substance containing industrial salt was mixed with 10L of methanol for crystallization, filte...
Embodiment 3
[0082] like figure 2 As shown, under stirring conditions, in 1L methanol waste liquid (the content of epichlorohydrin is 4.58wt%), add hydrochloric acid with a mass concentration of 32% dropwise to pH 3, then add 0.05g of tetraethyl chloride ammonium chloride, stirred for 2 hours in a water bath at 40 °C for acid hydrolysis, and distilled at 65 °C for 3 hours to obtain anhydrous methanol (0.87 L, the content of epichlorohydrin was 20 ppm, the mass content of methanol was 99.6%) and an oily high Boiler solution in methanol (0.11 L);
[0083] The methanol solution of the oily high boiler is subjected to atmospheric distillation (the condition of the atmospheric distillation is 90° C., 2 h) to obtain 0.065L of anhydrous methanol and 0.04L of the oily high boiler;
[0084] The oily high waste was mixed with 0.55 L of sodium hydroxide solution with a mass concentration of 40%, and a cyclization reaction was carried out (the temperature was 75° C. and the time was 1.5 min) to obtain...
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