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Method for efficiently recovering citrate soluble phosphorus from phosphorus-containing wastewater generated in glyphosate production process

A production process, glyphosate technology, applied in the direction of phosphorus oxides, etc., can solve the problems of efficient and practical recovery of phosphorus and realize regeneration and comprehensive utilization of phosphorus

Inactive Publication Date: 2012-12-12
JIANGSU GOOD HARVEST WEIEN AGROCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Therefore, it is imminent to further improve the utilization rate of phosphorus resources, and the above-mentioned invention obviously has no efficient and practical recovery of phosphorus in the phosphorus-containing wastewater in the glyphosate production process and realizes regeneration and comprehensive utilization.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: Get 800g of bisglyphosate waste water containing total phosphorus 8227mg / l (calculated as P) ， Add 32g of calcium oxide while stirring to make the formed mixture alkaline; raise the temperature to 80-85°C, react for 1 hour, filter, and the filtrate is 700g, containing 536.7mg / l of total phosphorus (calculated as P), and the removal rate of total phosphorus is 94.3%; 110g of wet filter residue was dried to obtain 57g, then put into a crucible and burned at 800°C for 2 hours to obtain 40 g of off-white solid, and the total phosphorus was detected to be 28.2% (measured as P 2 o 5 Calculated), citrate phosphorus 26.5% (in P 2 o 5 count).

Embodiment 2

[0022] Embodiment 2: Get 800g of bisglyphosate waste water containing total phosphorus 8227mg / l (calculated as P) ， Add 32g of calcium oxide while stirring to make the formed mixture alkaline; heat up to 75-80°C, react for 1 hour, filter, and the filtrate is 698g, containing 509mg / l of total phosphorus (calculated as P), and the removal rate of total phosphorus is 94.6%; filter residue wet product 113g, dried to obtain 57.6g, then put into a crucible and placed in a horse-boiling furnace and burned for 2 hours at 1000°C to obtain 40.1 g off-white solid, and the total phosphorus was detected to be 28.5% (measured as P 2 o 5 Calculated), citrate soluble phosphorus 26.8% (as P 2 o 5 count).

Embodiment 3

[0023] Example 3: Take 800g of bisglyphosate wastewater containing 13928mg / l of total phosphorus (calculated as P) ， Add 32g of calcium oxide while stirring to make the formed mixture alkaline; raise the temperature to 80-85°C, react for 1 hour, filter, and the filtrate is 653g, containing 580mg / l of total phosphorus (calculated as P), and the removal rate of total phosphorus is 96.6%; filter residue wet product 159g, dried to obtain 95g, then put in a crucible and placed in a horse-boiling furnace and burned for 2 hours at 1000°C to obtain 78 g off-white solid. 2 o 5 Calculated), citrate soluble phosphorus 26.8% (as P 2 o 5 count).

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Abstract

The invention discloses a method for efficiently recovering citrate soluble phosphorus from phosphorus-containing wastewater generated in a glyphosate production process. The method comprises the following steps of: adding one or a mixture of calcium oxide, magnesium oxide and sodium hydroxide into the phosphorus-containing waste water generated in the glyphosate production process so as to enable a formed mixed solution to be alkaline; and heating the mixed solution to 45-95 DEG C, reacting the mixed solution to generate a phosphorus-containing and indissoluble precipitate and a biochemical wastewater phase, separating the precipitate through solid-liquid separation, and processing the precipitate at a high temperature to obtain the citrate soluble phosphorus. According to the invention, the wastewater generated during the production of the glyphosate is treated, available phosphorus in the wastewater is fully recovered, the total phosphorus removal rate of the treated wastewater can reach above 94%, and formaldehyde which is toxic to biologic bacteria in the wastewater is controlled below 200PPM, so that the biodegradability of the wastewater is substantially improved, and the wastewater can enter a biochemical system after being additionally provided with water; and the citrate soluble phosphorus recovered and produced through the method can be directly used for or preparing a phosphatic fertilizer and feeds or used for producing phosphoric acid.

Description

technical field [0001] The invention relates to a method for efficiently recovering citrate-dissolved phosphorus by using phosphorus-containing wastewater in the glyphosate production process. Background technique [0002] N-(phosphonomethyl)glycine is a highly efficient herbicide with full absorption mode, commonly known as glyphosate, which is widely used in agriculture. It can remove annual and perennial weeds and algae species. With the continuous popularization and application of glyphosate gene crops, glyphosate is used more and more as a special herbicide. Therefore, the scale advantage and cost advantage of producing glyphosate are particularly important for enterprises manufacturing this product. At the same time, the advantages of its synthetic method Continuous optimization and comprehensive utilization of by-product resources are also getting more and more attention. At present, the main content of glyphosate raw powder in the production of glyphosate by the IDA ...

Claims

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Application Information

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IPC IPC(8): C01B25/12
Inventor 江连刘卫伟高学萍陈美徐东辉
Owner JIANGSU GOOD HARVEST WEIEN AGROCHEM
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