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Processing technology for recovering and utilizing mother solution of glyphosate as resource

A technology for glyphosate mother liquor and treatment process, which is applied in the field of treatment technology for recycling glyphosate mother liquor as a resource, can solve problems such as increased production cost, environmental pollution, etc., and achieves the advantages of increased concentration multiples, reduced membrane pollution, and thorough recovery. Effect

Active Publication Date: 2010-03-03
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a method that can effectively recycle the glyphosate resources in the glyphosate mother liquor under the premise of responding to relevant national policies, and simultaneously solve the problem of treating a large amount of solid waste produced by sodium chloride in the prior art Disposal of the problems of increased production costs and environmental pollution, and recycling of sodium chloride in the mother liquor, recycling and recycling of glyphosate mother liquor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Calcium chloride is used as the pretreatment coagulation precipitant, and the adsorption resin is used as the adsorbent. After the pretreatment of the glyphosate alkaline mother liquor by the glycine method, it is filtered, separated and concentrated by the membrane combination system, and is recovered after high-efficiency adsorption treatment and high-efficiency catalytic oxidation treatment. Effective separation and recycling of glyphosate and sodium chloride.

[0032] The glycine method glyphosate alkaline mother liquor 100L, the pH value is 12, mainly contains 1.4% glyphosate, 2.2% phosphite, 15% sodium chloride, etc., and its resource recycling treatment process It mainly includes the following steps:

[0033] 1) preparation mass concentration is the calcium chloride solution of 65%; Regulate the pH value of mother liquor with nitric acid to be 8.0, and the control temperature is 25 ℃; The calcium chloride solution prepared is phosphite radical quality in the moth...

Embodiment 2

[0039] Aluminum chloride hexahydrate is used as the pretreatment coagulation precipitant, modified activated carbon is used as the adsorbent, the glyphosate alkaline mother liquor is pretreated by the glycine method, and then filtered, separated, concentrated and recovered by the membrane combination system, high-efficiency adsorption treatment, and high-efficiency catalytic oxidation After treatment, the effective separation and recycling of glyphosate and sodium chloride can be realized.

[0040] The glycine method glyphosate alkaline mother liquor 100L, the pH value is 12, mainly contains 1.4% glyphosate, 2.2% phosphite, 15% sodium chloride, etc., and its resource recycling treatment process It mainly includes the following steps:

[0041] 1) preparation mass concentration is the aluminum chloride solution of 60%; Regulate the pH value of mother liquor with hydrochloric acid and be 9.0, control temperature is 25 ℃; The aluminum chloride solution that configures is the phosp...

Embodiment 3

[0047] Aluminum chloride hexahydrate and polyaluminum chloride are used as pretreatment coagulation and sedimentation agents, activated alumina is used as adsorbent, glyphosate alkaline mother liquor is pretreated by glycine method, and then filtered, separated, concentrated and recovered by membrane combination system, and highly efficient adsorption After treatment and high-efficiency catalytic oxidation treatment, the effective separation and resource recovery of glyphosate and sodium chloride can be realized.

[0048] The glycine method glyphosate alkaline mother liquor 100L, the pH value is 12, mainly contains 1.4% glyphosate, 2.2% phosphite, 15% sodium chloride, etc., and its resource recycling treatment process It mainly includes the following steps:

[0049] 1) by aluminum chloride hexahydrate mass concentration is 55%, polyaluminum chloride concentration is 35% preparation coagulation precipitant solution; Regulate the pH value of mother liquor with hydrochloric acid ...

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Abstract

The invention relates to a processing technology for recovering and utilizing the mother solution of glyphosate as a resource, which comprises the following concrete steps: firstly, preprocessing themother solution of glyphosate, and then, separating, concentrating and recovering the glyphosate by a membrane combination technique; returning the concentrated solution to a crystallization working section in the production process of the glyphosate after membrane filtration, thereby effectively recovering and utilizing the glyphosate resource; adsorbing the diluted solution with high efficiency,and further recovering and utilizing the glyphosate; and processing the adsorbed solution by catalytic oxidation with high efficiency to recover the sodium chloride resource with higher purity. The invention achieves the purposes of recovering and utilizing the glyphosate in the mother solution as a resource to the maximum extent and efficiency separating, recovering and utilizing the sodium chloride as a resource, has the advantages of economical technology, high efficiency, good system stability, high safety, easy operation, convenient industrial amplification, and the like, solves the problems of the soil salinization caused by applying water agents with high content of sodium chloride, the processing and disposal of solid wastes of the sodium chloride and the environment pollution, and effectively recovers and utilizes the resources of the glyphosate and the sodium chloride in the mother solution of the glyphosate.

Description

Technical field: [0001] The invention relates to a treatment process for resource recovery and utilization of glyphosate mother liquor. Background technique: [0002] Glyphosate (N-(phosphonomethyl) glycine) is a high-efficiency, low-toxicity, broad-spectrum, and safe herbicide. It has good systemic and conductive properties, and it can control perennial deep-rooted weeds It is very effective and widely used in agriculture, forestry, animal husbandry, horticulture, etc. It is currently the largest pesticide variety in the world. In recent years, due to glyphosate-resistant transgenic crops and energy shortages, the large-scale promotion of biofuel crops has provided new opportunities for the production and application of glyphosate. [0003] There are two main production and synthesis processes of glyphosate: glycine route and IDA route. Most domestic enterprises use glycine-dimethyl phosphite method to synthesize glyphosate. The main raw materials of this method are glycin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F9/38C01D3/04C02F9/10C02F1/04C02F1/72C02F1/44C02F1/28
Inventor 徐炎华刘志英谢明赵浩
Owner NANJING UNIV OF TECH
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