Method for preparing calcium-magnesia phosphate fertilizer by using waste water generated in synthetic process of 2, 4, 6-trichloropyrimidine
A technology of calcium magnesium phosphate fertilizer and trichloropyrimidine, which is applied in the field of waste water treatment and recycling, can solve environmental pollution and other problems, achieve high economic value, no damage and pollution, and protect the environment
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Embodiment 1
[0028] (1) Recovery of catalyst
[0029] Take 500 mL of waste water generated during the synthesis of 2,4,6-trichloropyrimidine in a 1000 mL beaker, add 40 mL of distilled water, add 15.5 mL of NaOH solution with a mass concentration of 20%, and adjust the pH to 8.50. The solution is divided into two layers, the upper layer is a khaki emulsion and the lower layer is a colorless liquid. Use a separatory funnel to separate and collect the khaki-yellow emulsion in the upper layer; add 40 mL of water to the collected khaki-yellow emulsion to wash, stir, let stand, and then use a separatory funnel to separate, and the lower layer is the same as the lower layer obtained last time. liquid merger. Add 40 mL of distilled water to the upper layer of the khaki emulsion (organic phase), then distill out the organic phase by steam distillation under reduced pressure, cool for 60 min, the leaching liquid is divided into two layers, the upper layer of yellow oil is the catalyst, use a separ...
Embodiment 2
[0035] (1) Recovery of catalyst
[0036] Take 500 mL of waste water generated during the synthesis of 2,4,6-trichloropyrimidine in a 1000 mL beaker, add 40 mL of distilled water, add 15.0 mL of NaOH solution with a mass concentration of 20%, and adjust the pH to 8.00. The solution is divided into two layers, the upper layer is a khaki emulsion and the lower layer is a colorless liquid. Use a separatory funnel to separate and collect the khaki-yellow emulsion; add 40 mL of water to the khaki-yellow emulsion to wash, stir, let stand, and then use a separatory funnel to separate, and the lower layer liquid is combined with the previous lower layer liquid. Add 40 mL of distilled water to the upper layer of the khaki emulsion (organic phase), then distill out the organic phase by steam distillation under reduced pressure, cool for 60 min, the leaching liquid is divided into two layers, the upper layer of yellow oil is the catalyst, use a separatory funnel The upper khaki oily liqu...
Embodiment 3
[0042] (1) Recovery of catalyst
[0043] Take 500 mL of waste water generated during the synthesis of 2,4,6-trichloropyrimidine in a 1000 mL beaker, add 40 mL of distilled water, add 15.2 mL of NaOH solution with a mass concentration of 20%, and adjust the pH to 8.40. The solution is divided into two layers, the upper layer is a khaki emulsion and the lower layer is a colorless liquid. Use a separatory funnel to separate and collect the khaki-yellow emulsion; add 40 mL of water to the khaki-yellow emulsion to wash, stir, let stand, and then use a separatory funnel to separate, and the lower layer liquid is combined with the previous lower layer liquid. Add 40 mL of distilled water to the upper layer of the khaki emulsion (organic phase), then distill the organic phase with steam under reduced pressure, cool for 60 min, the leaching liquid is divided into two layers, and the upper layer of yellow oil is the catalyst, which is separated by liquid separation. The funnel separate...
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