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Glyphosate mother liquor comprehensive treatment and resource recycling method

A technology for comprehensive treatment of glyphosate mother liquor, which is applied in chemical instruments and methods, combustion methods, purification/separation of amino compounds, etc., and can solve problems such as difficult separation and purification, high processing costs, and complex components of glyphosate mother liquor

Pending Publication Date: 2020-06-26
陈兴华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] In summary, glyphosate mother liquor has complex components, difficult separation and purification, difficult resource utilization, high processing costs, and large environmental pollution, which are industry-specific problems

Method used

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  • Glyphosate mother liquor comprehensive treatment and resource recycling method
  • Glyphosate mother liquor comprehensive treatment and resource recycling method
  • Glyphosate mother liquor comprehensive treatment and resource recycling method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0116] refer to Figure 1-4 Shown, the method for comprehensive treatment of mother liquor of glyphosate and recycling of resources comprises the following steps:

[0117] S1: Pretreatment of acidic glyphosate mother liquor:

[0118]Specifically, S11: Take 30kg of glyphosate mother liquor M0, the specific gravity of said glyphosate mother liquor M0 is 1.09, the measured content of triethylamine hydrochloride in glyphosate mother liquor M0 is 28%, and the measured glyphosate The pH value of the mother liquor M0 is -0.1; 3.8kg of sodium hydroxide liquid alkali with a content of 32% is added to the glyphosate mother liquor M0 to obtain 33.8kg of the mother liquor M1, and the measured pH value of the mother liquor M1 is 1.2;

[0119] S12: Add 0.6kg of ammonia gas to the mother liquor M1 to obtain 34.4kg of mother liquor M2. The measured pH of mother liquor M2 is 6.2; add 90g of triethylamine to mother liquor M2 to obtain 34.5kg of mother liquor M3. The measured pH of mother liquo...

Embodiment 2

[0163] The difference between embodiment 2 and embodiment 1 lies in the treatment of the concentrate M5-2 in step S33, and the rest are the same.

[0164] Specifically, take 620g of the concentrated solution M5-2 obtained in Example 1, first heat it to a temperature range of 60-88°C to evaporate, and distill 6.5g of solvent (its main components are acetone and methanol in the extractant B, which can be combined into Distilled mother liquor M5-1 obtained in extractant B), the remaining 613g concentrated solution is recorded as concentrated solution M5-3; sampling inspection shows that the content of glyphosate in concentrated solution M5-3 is 6.2%, glyphosate content is 31.1%, chlorine Root Cl - 1.8%, water content 42%; the main components of the concentrate M5-3 are glyphosate ammonium salt and sodium salt, glyphosate ammonium salt and sodium salt, so it can be called glyphosate and glyphosate mixed solution Product; Concentrate M5-3 can be directly sold as glyphosate pestici...

Embodiment 3

[0166] The difference between embodiment 3 and embodiment 2 lies in the treatment of concentrated solution M5-3, and the rest are the same.

[0167] Specifically, use concentrated solution M5-3 to prepare low-salt, high-content pyrophosphate or orthophosphate;

[0168] Specifically, take 50g of the concentrated solution M5-3 in Example 2, add sodium hydroxide liquid caustic soda to adjust the pH value to 10.5, and burn at a high temperature in a muffle furnace at 800°C for 1.2h to obtain 19g of sodium pyrophosphate product, which The surface color is gray and white, the inner color is white, the main content is 91.48%, and the sodium chloride content is 7.0%.

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Abstract

The invention discloses a glyphosate mother liquor comprehensive treatment and resource recycling method which comprises the following steps: adding a pH value regulator into acidic mother liquor M0,standing for layering, and separating the solution to obtain mother liquor M4 at the upper layer and mother liquor M5 at the lower layer; the mother liquor M4 and the mother liquor M5 are treated andapplied, triethylamine hydrochloride, triethylamine, chloride salt, methyltriethylammonium chloride, phosphorous acid or salt thereof, hydroxymethylphosphonic acid or salt thereof, glyphosate or saltthereof, glyphosate or salt thereof and glyphosate or salt thereof are recovered from the mother liquor M4 and the mother liquor M5, and are respectively and correspondingly converted into products with higher additional values for utilization. The glyphosate mother liquor comprehensive treatment and resource recycling method has the advantages that the emission is reduced from the source; the method reduces the total amount and treatment load of the glyphosate mother liquor, reduces environmental pollution, realizes reasonable recycling and appreciation of resources, improves economic benefits, is environment-friendly, outstanding in economic benefits and good in technical implementation effect, and is suitable for large-scale industrial application.

Description

technical field [0001] The invention belongs to the technical field of glyphosate production, and specifically relates to a method for comprehensive treatment of glyphosate mother liquor and resource recycling. Background technique [0002] Glyphosate has the characteristics of high efficiency, broad spectrum, low toxicity, and economy. It has been prosperous for more than 40 years and is one of the largest monomeric pesticides. There are two production methods for glyphosate, one is the IDA method, which is widely used by foreign companies, and about 25% of my country’s production capacity also adopts this method; the other is the glycine method, which is adopted by most domestic enterprises and most of the production capacity, with a production capacity of about 500,000 tons / year. The glycine method is used to prepare glyphosate, which uses glycine, paraformaldehyde or formaldehyde and alkyl phosphite as raw materials, and uses triethylamine as a catalyst to obtain glyphos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C209/86C07C211/63C07C211/05C07F9/38C01B25/42C01B25/163F23G7/04
CPCC07C209/86C07F9/3813C07F9/3808C01B25/425C01B25/163F23G7/04C01P2006/80F23G2209/101C07C211/63C07C211/05
Inventor 陈兴华李勇林治华
Owner 陈兴华
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