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A treatment method for phosphorus-containing waste produced in the production process of glufosinate-ammonium

A production process and treatment method technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of high chloride ion content and low effective solid product content, and achieve Improve the removal rate and avoid the effect of escape

Active Publication Date: 2017-07-28
ZHEJIANG XINAN CHEM INDAL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] However, the high-phosphorus-containing waste produced in the production process of glufosinate-ammonium contains not only a large amount of organic phosphorus, but also a large amount of esters, hydrochloride of organic matter, and ammonia nitrogen. The above-mentioned pretreatment process is not enough to meet the requirements. The effective content of solid products is low and the content of chloride ions is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Take by weighing the phosphorus-containing waste material 150g that produces in the pasty glufosinate-ammonium production process, wherein the content of COD is 85.5wt%, and total phosphorus content is 13.4wt%, and chloride content is 9.3wt%, and ammonia nitrogen content is 5.6wt%, The ammonium salt of glufosinate-ammonium is 1.15wt%, and the pH value is 1.5. In the phosphorus-containing waste material, adding concentration is 225g of 30wt% sodium hydroxide aqueous solution, after stirring and dissolving, measure the pH value of the phosphorus-containing waste material to be 13.5, and the above-mentioned phosphorus-containing waste material adjusted to the pH value is heated to 104° C. for reflux alkaline hydrolysis for 3 Hour. After the alkali hydrolysis is finished, the mixed solution is concentrated, concentrated at normal pressure to a terminal temperature of 115°C, crystallized and filtered, and sodium chloride is recovered. The filtrate enters the high-temperatur...

Embodiment 2

[0079] Take by weighing the phosphorus-containing waste material 150g that produces in the liquid glufosinate-ammonium production process, wherein the content of COD is 65.5wt%, and total phosphorus content is 7.71wt%, and chloride root content is 5.68wt%, and ammonia nitrogen content is 0.2wt%, The content of glufosinate-ammonium hydrochloride is 0.85wt%, and the pH value is 0. Adding concentration is 116g of sodium hydroxide aqueous solution of 30wt% in waste material, after stirring and dissolving, measure the pH value of phosphorus-containing waste material to be 13, the above-mentioned phosphorus-containing waste material adjusted pH value is heated to 102 ℃ of reflux alkaline hydrolysis for 2 hours. After the alkali hydrolysis is finished, the mixed solution is concentrated, concentrated at normal pressure to the end point temperature of 116°C, crystallized and filtered, and sodium chloride is recovered. The filtrate enters the high-temperature oxidation furnace for spra...

Embodiment 3

[0081] Take by weighing the phosphorus-containing waste material 150g that produces in the liquid glufosinate-ammonium production process, wherein the content of COD is 65.5wt%, and total phosphorus content is 7.71wt%, and chloride root content is 5.68wt%, and ammonia nitrogen content is 0.2wt%, The content of glufosinate-ammonium hydrochloride is 0.85wt%, and the pH value is 0. Adding concentration is 158g of aqueous sodium hydroxide solution of 30wt% in waste material, after stirring and dissolving, measure the pH value of phosphorus-containing waste material to be 14, the above-mentioned phosphorus-containing waste material adjusted pH value is heated to 102 ℃ of reflux alkaline hydrolysis for 2 hours. After the alkali hydrolysis is finished, the mixed solution is concentrated, concentrated at normal pressure to the end point temperature of 116°C, crystallized and filtered, and sodium chloride is recovered. The filtrate enters the high-temperature oxidation furnace for spra...

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Abstract

The invention provides a method for treating phosphorus-containing waste produced in the production process of glufosinate-ammonium, comprising the following steps: A) sequentially subjecting the phosphorus-containing waste produced in the production process of glufosinate-ammonium to alkaline hydrolysis, concentration and filtration to obtain filtrate ; B) high temperature oxidation of the filtrate to obtain a solid product. In the treatment method of phosphorus-containing waste provided by the present invention, the alkaline hydrolysis process not only neutralizes the hydrochloric acid in the phosphorus-containing waste, but also frees methanol, ethanol and ammonia in the ester and salt in the phosphorus-containing waste through alkaline hydrolysis, and evaporates It is recovered when concentrated. Moreover, strong alkaline phosphorus-containing waste can not only improve the removal rate of harmful substance chlorine ions in the waste when it is concentrated, but also make the phosphorus pentoxide generated by the oxidation of organic phosphorus easier to combine with sodium to form phosphate precipitation during high-temperature oxidation down to prevent phosphorus pentoxide from escaping into the oxidized exhaust.

Description

technical field [0001] The invention belongs to the technical field of phosphorus-containing waste treatment, and in particular relates to a treatment method for phosphorus-containing waste produced in the production process of glufosinate-ammonium. Background technique [0002] Based on the pressure of both resources and environment, since the 1990s, people have made some progress in the research on the technology of removing and recovering phosphorus from phosphorus-containing waste. Phosphorus removal methods commonly used at present include three categories: chemical method, biological method and adsorption method. [0003] The biological phosphorus removal process has a large infrastructure, poor operation stability, and strong dependence. When the organic matter content in the wastewater is high or the phosphorus content exceeds 10mg / L, it is difficult for the effluent to meet the phosphorus discharge standard. At this time, it is often necessary to treat the effluent ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C01B25/168C01B25/30C01B25/41C01B25/445C01B25/26
Inventor 朱建民詹波周曙光祝小红汪欢林春李遵陕张羽邵珺佘慧玲
Owner ZHEJIANG XINAN CHEM INDAL GROUP