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Method for preparing phosphorus-potassium nitrate fertilizer by using waste water generated in synthetic process of 2, 4, 6-trichloropyrimidine

A technology of phosphorus and potassium nitrate fertilizer and synthesis process, applied in chemical instruments and methods, chemical/physical processes, neutralized water/sewage treatment, etc., can solve environmental pollution and other problems, achieve high economic value, low free water content, The effect of less impurities

Inactive Publication Date: 2010-01-06
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using barbituric acid as raw material, phosphorus oxychloride as chlorination agent, under the catalysis of QD composite catalyst (N, N-diethylaniline, N, N-dimethylaniline, quinoline), The waste liquid produced in the process of synthesizing 2,4,6-trichloropyrimidine contains a large amount of phosphorus (the content of phosphorus is 3.52-3.72g / L, existing in the form of phosphoric acid) and catalyst, if it is discharged directly, will cause serious pollution to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Recovery of catalyst

[0025] Take 500mL of waste water generated during the synthesis of 2,4,6-trichloropyrimidine in a 1000mL beaker, add 40mL of distilled water, add 15.5mL of NaOH solution with a mass concentration of 20% to it, 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 emulsion in the upper layer. Add 40mL of water to the collected khaki emulsion to wash, stir, let it stand, and then separate it with a separatory funnel. The lower layer liquid is combined with the lower layer liquid obtained last time to prepare phosphorus and potassium nitrate fertilizer. Add 40mL of distilled water to the upper khaki emulsion (organic phase), then distill the organic phase with steam under reduced pressure distillation, cool for 60min, and the slip-out liquid is divided into two layers. The yellow oil in the upper...

Embodiment 2

[0032] (1) Recovery of catalyst

[0033] Take 500mL of waste water generated during the synthesis of 2,4,6-trichloropyrimidine in a 1000mL beaker, add 40mL of distilled water, add 15.0mL of NaOH solution with a mass concentration of 20% to it, 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 emulsion; add 40mL of water to the khaki emulsion to wash, stir, let stand, then separate with a separatory funnel, the lower layer is combined with the previous obtained lower layer, and For the preparation of potassium nitrate fertilizer. Add 40mL of distilled water to the upper khaki emulsion (organic phase), then distill the organic phase with steam under reduced pressure distillation, cool for 60min, and the slip-out liquid is divided into two layers. The yellow oil in the upper layer is the catalyst. Separate, collect, and meas...

Embodiment 3

[0040] (1) Recovery of catalyst

[0041] Take 500mL of waste water generated during the synthesis of 2,4,6-trichloropyrimidine in a 1000mL beaker, add 40mL of distilled water, add 15.2mL of NaOH solution with a mass concentration of 20% to it, 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 emulsion; add 40mL of water to the khaki emulsion to wash, stir, let stand, then separate with a separatory funnel, the lower layer is combined with the previous obtained lower layer, and For the preparation of potassium nitrate fertilizer. Add 40 mL of distilled water to the upper khaki emulsion (organic phase), then distill off the organic phase with steam under reduced pressure, cool for 60 minutes, and the liquid that slips out is divided into two layers. The yellow oil in the upper layer is the catalyst. The funnel was separated...

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Abstract

The invention provides a method for preparing phosphorus-potassium nitrate fertilizer by using waste water generated in the synthetic process of 2, 4, 6-trichloropyrimidine, which comprises the following steps: separating out a catalyst in a waste liquid by a reduced pressure distillation method, and acquiring calcium phosphate in a deposition mode; then respectively grinding the calcium phosphate, ammonium nitrate and potassium nitrate into fine powders, and uniformly mixing the fine powders in a certain proportion to acquire the phosphorus-potassium nitrate fertilizer through vacuum reduced pressure drying. The production ratio is 99.09-99.80 percent. The prepared phosphorus-potassium nitrate fertilizer has higher contents of total nutrients and each nutrient and low contents of free water, and each technical index is superior to the standard of the high-class product of the phosphorus-potassium nitrate fertilizer in the State Standard of the People's Republic of China (GB / T 10510-2007); meanwhile, the catalyst in the waste liquid is recovered, the phosphorus and the organic catalyst in the waste liquid can be recycled (the recovery ratio of the phosphorus in the waste water reaches 99.77-99.86 percent, and the recovery ratio of the catalyst reaches 81-89 percent), and the method has good social meanings and high economic value.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment and recycling, and relates to a recycling and application technology of phosphorus and catalysts in waste water produced in the synthesis process of 2,4,6-trichloropyrimidine, in particular to a method of utilizing 2,4,6-trichloropyrimidine The invention discloses a method for preparing phosphorus and potassium nitrate fertilizer from waste water produced in the synthesis process of chloropyrimidine. Background technique [0002] In addition to phosphorus, potassium nitrate fertilizer also contains nitrogen and potassium elements. The three elements of nitrogen, phosphorus and potassium are all beneficial elements necessary for plants, so phosphorus and potassium nitrate fertilizer has the characteristics of high-efficiency fertilizer. [0003] As one of the main types of fertilizers, "potassium fertilizer" has a great effect on the material and energy conversion and material cycle i...

Claims

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Application Information

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IPC IPC(8): C05G1/00B01J31/02C02F9/10C02F1/04C02F1/66C02F103/36
CPCY02P20/584
Inventor 秦淑琪杨武王建明牛二忠
Owner NORTHWEST NORMAL UNIVERSITY
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