Impurity removal method for ammonium chloride flash water and preparation method of ammonium glyphosate aqueous solution

Abstract

The invention provides an impurity removal method for ammonium chloride flash water, which comprises the following steps of: removing ammonia nitrogen from the ammonium chloride flash water: adjusting the pH value of the ammonium chloride flash water to be alkaline by using alkali, adding magnesium salt and phosphate to generate magnesium ammonium phosphate precipitate, stirring, crystallizing, standing, filtering and separating to obtain magnesium ammonium phosphate and filtrate for later use; and acetate ion removal of the ammonium chloride flash water: enabling the filtrate to pass through a resin column, and removing acetate to obtain the ammonium chloride flash water after impurity removal. In order to solve the problem that the ammonium chloride flash water is difficult to effectively treat, residual chloroacetate ions in the ammonium chloride flash water are removed by adopting methods such as activated carbon adsorption and ion exchange resin adsorption, and the ammonium chloride flash water is applied to an ammonium glyphosate aqueous solution, so that the treatment cost of the ammonium chloride flash water is greatly reduced; and a new thought is provided for the treatment of the ammonium chloride flash water.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of herbicides, and particularly relates to an application method of ammonium chloride flash water on glyphosate ammonium salt aqueous agent. BACKGROUND

[0002] At present, the production method of glycine at home mainly adopts the traditional chloroacetic acid ammonolysis method. The waste liquid discharged in the production of glycine by the method contains a large amount of ammonium chloride, hexamethylene triamine, ammonia nitrogen and other substances. In order to recover ammonium chloride, the evaporation condensate water generated is a high-difficulty wastewater in the industry. The ammonium chloride flash water is the wastewater generated in the process of one-effect and two-effect evaporation and flash evaporation of the glycine rectification residue, which is clear and transparent, has high ammonia nitrogen content, high acetate ion content and amine smell. The treatment method of ammonium chloride flash water mainly has two kinds. One is used as secondary water for glycine synthesis reaction, but the consumption is limited. The other is mixed with liquid ammonia to produce ammonia water and sold externally, but the cost is high.

[0003] The invention patent with the publication number CN107573252A and the name "a method for recycling wastewater in the process of producing glycine by chloroacetic acid method" recovers the evaporation condensate water generated when recovering ammonium chloride, which has different components, and uses it in different processes of glycine synthesis. However, the reuse of evaporation condensate water will cause the process stability of glycine synthesis and extraction to be poor, and the yield and quality of glycine will also fluctuate with the process stability of ammonium chloride recovery.

[0004] The invention patent with the publication number CN111943321B and the name "a method for recycling glycine production wastewater" separates and concentrates the catalyst hexamethylene triamine by using a multi-stage nanofiltration system, and the effluent after deep removal of high-concentration ammonia nitrogen by using a deamination membrane system is subjected to biochemical treatment. However, the treatment cost is high.

[0005] The invention patent with the publication number CN109651182B and the name "a clean treatment method for ammonium chloride production wastewater" treats the water obtained from the one-effect evaporation system by using a vacuum low-temperature evaporation system, uses the low-ammonia-nitrogen condensate water obtained as an industrial-grade ammonia water production raw material, and directly recycles the residual liquid to the chloroacetic acid method glycine production process. The method is energy-saving and environmentally friendly, but a large amount of residual liquid is recycled to the glycine synthesis, which may affect the quality of glycine. SUMMARY

[0006] In order to overcome the shortcomings of the prior art, the application provides an application method of ammonium chloride flash water on glyphosate ammonium salt aqueous agent. The chloroacetate ions remaining in the ammonium chloride flash water are removed by using methods such as activated carbon adsorption and ion exchange resin adsorption, and the ammonium chloride flash water is applied on the glyphosate ammonium salt aqueous agent.

[0007] A method for removing impurities from ammonium chloride flash water, comprising the following steps: (1) Ammonium chloride flash water ammonia nitrogen removal: ammonium chloride flash water is adjusted to alkaline by alkali, and then magnesium salt and phosphate are added to generate ammonium magnesium phosphate precipitate. After stirring, crystallization, standing and filtration separation, ammonium magnesium phosphate is obtained, and the filtrate is reserved; (2) Ammonium chloride flash water acetate ion removal: the filtrate is passed through a resin column to remove acetate to obtain impurity-removed ammonium chloride flash water.

[0008] The alkali in step (1) is NaOH or KOH, the concentration of NaOH is in the range of 15% to 32%, and the concentration of KOH is in the range of 15% to 48%; the pH is adjusted to the appropriate range of 9.0 to 11.0.

[0009] The slow stirring time is 20 to 40 minutes, and the standing time is 1 to 3 hours.

[0010] The magnesium salt is one or more of magnesium chloride, magnesium sulfate, and magnesium carbonate, and the phosphate is one or more of disodium hydrogen phosphate, dipotassium hydrogen phosphate, and sodium tripolyphosphate; the magnesium salt and the phosphate are added in a molar ratio of Mg 2+ :NH4 + :PO4 3- = (1.0 to 1.3): 1.0: 1.0.

[0011] The resin in the resin column is selected from any one of strong basic anion exchange resins, including SA10ALLP, MARATHON™A, IRA458RF CI, and Amberlite IRA-400.

[0012] The strong basic anion exchange resin is soaked in NaOH solution for a period of time, and after the resin is converted to OH - , it is washed with deionized water to neutral, and then the resin is loaded into an ion exchange column.

[0013] The mass concentration of the NaOH solution is in the range of 4% to 10%; the resin soaking time is 2 to 4 hours; and the flow rate of the ammonium chloride flash water through the resin column is 1 to 2 BV / h.

[0014] The preparation method of the glyphosate ammonium salt aqueous agent comprises the method; Specifically, ammonium glyphosate mother liquor is obtained by adding glyphosate technical material and a certain amount of ammonia water to the impurity-removed ammonium chloride flash water prepared by the method to make glyphosate react into salt. The glyphosate ammonium salt aqueous agent is prepared by adding additives to the ammonium glyphosate mother liquor.

[0015] The molar ratio of the ammonia water to glyphosate is (1.1 to 2.0): 1.0.

[0016] The additive mass is in the range of 5% to 12%.

[0017] The additive is alkyl glycoside.

[0018] The present application aims at the problem that ammonium chloride flash water is difficult to be effectively treated, adopts activated carbon adsorption, ion exchange resin adsorption and other methods to remove residual chloroacetic ion in the ammonium chloride flash water, and applies the ammonium chloride flash water on glyphosate ammonium salt water agent, so that the treatment cost of the ammonium chloride flash water is greatly reduced, and a new idea is provided for the treatment of the ammonium chloride flash water.

[0019] Compared with the prior art, the present application has the beneficial effects that: (1) The present application effectively realizes the recycling of ammonium chloride flash water, applies the treated ammonium chloride flash water on glyphosate ammonium salt water agent, can reduce the treatment cost of the ammonium chloride flash water, can reduce the use of industrial soft water, is simple to operate, involves less materials, and is easy to be industrialized and popularized. (2) The operation steps of the present application are simple and easy to operate, do not involve complex reactions, and the activated carbon, ion exchange resin and the like can be recycled and reused, the recycling cost is low, and the present application has certain environmental protection benefits and economic benefits. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the state after heat storage for 14 days of Example 1.

[0021] Figure 2 It is the state after heat storage for 14 days of Comparative Example 1. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application is further described in detail below with reference to examples. It should be understood that the specific examples described herein are only used to explain the present application, and are not used to limit the present application.

[0023] Example 1 (1) 23% NaOH solution is added to the ammonium chloride flash water, the pH is adjusted to 9.0, magnesium sulfate and disodium hydrogen phosphate (molar ratio Mg 2+ : NH4 + : PO4 3- = (1.0:1.0:1.0) are added, and then fast stirring is carried out for 2 minutes, and slow stirring is carried out for 30 minutes. After standing for 2 hours, the precipitate is filtered, and the filtrate is reserved.

[0024] (2) Soak SA10ALLP type strong base anion exchange resin in 4% NaOH solution for 2 hours until the resin is converted to OH⁻ form, then rinse with deionized water until neutral. Pack the resin into the ion exchange column, avoiding air bubbles. Pass the above filtrate through the resin column at a flow rate of 1 BV / h. Acetate ions are adsorbed to obtain treated ammonium chloride flash water.

[0025] (3) Add 459.42g of treated ammonium chloride flash water to a 1000mL four-necked flask, add 315.79g of 95% glyphosate technical grade, start stirring, add ammonia water (so that the molar ratio of ammonia water to glyphosate is 1.2:1.0), so that glyphosate reacts to form salt.

[0026] (4) Add 80g of adjuvant to the glyphosate ammonium salt mother liquor to prepare a 33% glyphosate ammonium salt solution. The finished product is colorless and transparent with no odor. After being stored at 54℃ for 14 days, the finished product remains colorless and transparent with no odor. The glyphosate content, ammonium ion content and other physicochemical indicators are all qualified.

[0027] Example 2 (1) Add 23% NaOH solution to ammonium chloride flash water, adjust the pH to 10.0, and add magnesium sulfate and disodium hydrogen phosphate (molar ratio of Mg to Mg). 2+ NH4 + :PO4 3- = (1.0:1.0:1.0), first stir quickly for 2 minutes, then stir slowly for 30 minutes. After standing for 2 hours, filter the precipitate and keep the filtrate for later use.

[0028] (2) Soak SA10ALLP type strong base anion exchange resin in 6% NaOH solution for 2 hours until the resin is converted to OH⁻ form, then rinse with deionized water until neutral. Pack the resin into the ion exchange column, avoiding air bubbles. Pass the above filtrate through the resin column at a flow rate of 1.5 BV / h. Acetate ions are adsorbed to obtain treated ammonium chloride flash water.

[0029] (3) Add 447.35g of treated ammonium chloride flash distilled water to a 1000mL four-necked flask, add 315.79g of 95% glyphosate technical grade, start stirring, add ammonia water (so that the molar ratio of ammonia water to glyphosate is 1.3:1.0), so that glyphosate reacts to form salt.

[0030] (4) Add 80g of adjuvant to the glyphosate ammonium salt mother liquor to prepare a 33% glyphosate ammonium salt solution. The finished product is colorless and transparent with no odor. After being stored at 54℃ for 14 days, the finished product remains colorless and transparent with no odor. The glyphosate content, ammonium ion content and other physicochemical indicators are all qualified.

[0031] Example 3 (1) Add 30% NaOH solution to ammonium chloride flash water, adjust the pH to 11.0, and add magnesium sulfate and disodium hydrogen phosphate (molar ratio of Mg to Mg). 2+ NH4 + :PO4 3- = (1.1:1.0:1.0), first stir rapidly for 2 minutes, then stir slowly for 40 minutes. After standing for 3 hours, filter the precipitate and use the filtrate for later use.

[0032] (2) Soak SA10ALLP type strong base anion exchange resin in 8% NaOH solution for 3 hours until the resin is converted to OH⁻ form, then rinse with deionized water until neutral. Pack the resin into the ion exchange column, avoiding air bubbles. Pass the above filtrate through the resin column at a flow rate of 2.0 BV / h. Acetate ions are adsorbed to obtain treated ammonium chloride flash water.

[0033] (3) Add 435.29g of treated ammonium chloride flash water to a 1000mL four-necked flask, add 315.79g of 95% glyphosate technical grade, start stirring, add ammonia water (so that the molar ratio of ammonia water to glyphosate is 1.4:1.0), so that glyphosate reacts to form salt.

[0034] (4) Add 80g of adjuvant to the glyphosate ammonium salt mother liquor to prepare a 33% glyphosate ammonium salt solution. The finished product is colorless and transparent with no odor. After being stored at 54℃ for 14 days, the finished product remains colorless and transparent with no odor. The glyphosate content, ammonium ion content and other physicochemical indicators are all qualified.

[0035] Example 4 (1) Add 30% NaOH solution to ammonium chloride flash water, adjust the pH to 9.0, and add magnesium sulfate and dipotassium hydrogen phosphate (molar ratio of Mg to Mg). 2+ NH4 + :PO4 3- = (1.2:1.0:1.0), stir rapidly for 2 minutes, then stir slowly for 30 minutes. After standing for 3 hours, filter the precipitate and keep the filtrate for later use.

[0036] (2) Soak SA10ALLP type strong base anion exchange resin in 4% NaOH solution for 3 hours until the resin is converted to OH⁻ form, then rinse with deionized water until neutral. Pack the resin into an ion exchange column, avoiding air bubbles. Pass the above filtrate through the resin column at a flow rate of 2 BV / h. Acetate ions are adsorbed to obtain treated ammonium chloride flash water.

[0037] (3) Add 423.22g of treated ammonium chloride flash water to a 1000mL four-necked flask, add 315.79g of 95% glyphosate technical grade, start stirring, add ammonia water (so that the molar ratio of ammonia water to glyphosate is 1.5:1.0), so that glyphosate reacts to form salt.

[0038] (4) Add 80g of adjuvant to the glyphosate ammonium salt mother liquor to prepare a 33% glyphosate ammonium salt solution. The finished product is colorless and transparent with no odor. After being stored at 54℃ for 14 days, the finished product remains colorless and transparent with no odor. The glyphosate content, ammonium ion content and other physicochemical indicators are all qualified.

[0039] Example 5 (1) Add 15% KOH solution to ammonium chloride flash water, adjust pH to 9.0, and add magnesium sulfate and dipotassium hydrogen phosphate (molar ratio of Mg to Mg). 2+ NH4 + :PO4 3- = (1.3:1.0:1.0), stir rapidly for 2 minutes, then stir slowly for 30 minutes. After standing for 3 hours, filter the precipitate and keep the filtrate for later use.

[0040] (2) Soak the MARATHON™ A type strong base anion exchange resin in 5% NaOH solution for 3 hours until the resin is converted to OH⁻ form, then rinse with deionized water until neutral. Pack the resin into the ion exchange column, avoiding air bubbles. Pass the above filtrate through the resin column at a flow rate of 1 BV / h. Acetate ions are adsorbed to obtain treated ammonium chloride flash water.

[0041] (3) Add 411.15g of treated ammonium chloride flash water to a 1000mL four-necked flask, add 315.79g of 95% glyphosate technical grade, start stirring, add ammonia water (so that the molar ratio of ammonia water to glyphosate is 1.6:1.0), so that glyphosate reacts to form salt.

[0042] (4) Add 80g of adjuvant to the glyphosate ammonium salt mother liquor to prepare a 33% glyphosate ammonium salt solution. The finished product is colorless and transparent with no odor. After being stored at 54℃ for 14 days, the finished product remains colorless and transparent with no odor. The glyphosate content, ammonium ion content and other physicochemical indicators are all qualified.

[0043] Example 6 (1) Add 20% KOH solution to ammonium chloride flash water, adjust pH to 9.0, and add magnesium sulfate and dipotassium hydrogen phosphate (molar ratio of Mg to Mg). 2+ NH4 + :PO4 3- = (1.1:1.0:1.0), stir rapidly for 2 minutes, then stir slowly for 30 minutes. After standing for 3 hours, filter the precipitate and keep the filtrate for later use.

[0044] (2) Soak the IRA458RF CI type strong base anion exchange resin in 5% NaOH solution for 2 hours until the resin is converted to OH⁻ form, then rinse with deionized water until neutral. Pack the resin into the ion exchange column, avoiding air bubbles. Pass the above filtrate through the resin column at a flow rate of 1.5 BV / h. Acetate ions are adsorbed to obtain treated ammonium chloride flash water.

[0045] (3) Add 399.09g of treated ammonium chloride flash distilled water to a 1000mL four-necked flask, add 315.79g of 95% glyphosate technical grade, start stirring, add ammonia water (so that the molar ratio of ammonia water to glyphosate is 1.7:1.0), so that glyphosate reacts to form salt.

[0046] (4) Add 80g of adjuvant to the glyphosate ammonium salt mother liquor to prepare a 33% glyphosate ammonium salt solution. The finished product is colorless and transparent with no odor. After being stored at 54℃ for 14 days, the finished product remains colorless and transparent with no odor. The glyphosate content, ammonium ion content and other physicochemical indicators are all qualified.

[0047] Example 7 (1) Add 30% KOH solution to ammonium chloride flash water, adjust pH to 10.0, and add magnesium sulfate and dipotassium hydrogen phosphate (molar ratio of Mg to Mg). 2+ NH4 + :PO4 3- = (1.2:1.0:1.0), stir rapidly for 2 minutes, then stir slowly for 30 minutes. After standing for 3 hours, filter the precipitate and keep the filtrate for later use.

[0048] (2) Soak Amberlite IRA-400 strong base anion exchange resin in 5% NaOH solution for 2 hours until the resin is converted to OH⁻ form, then rinse with deionized water until neutral. Pack the resin into an ion exchange column, avoiding air bubbles. Pass the above filtrate through the resin column at a flow rate of 1.5 BV / h. Acetate ions are adsorbed, and treated ammonium chloride flash water is obtained.

[0049] (3) Add 387.02g of treated ammonium chloride flash water to a 1000mL four-necked flask, add 315.79g of 95% glyphosate technical grade, start stirring, add ammonia water (so that the molar ratio of ammonia water to glyphosate is 1.8:1.0), so that glyphosate reacts to form salt.

[0050] (4) Add 80g of adjuvant to the glyphosate ammonium salt mother liquor to prepare a 33% glyphosate ammonium salt solution. The finished product is colorless and transparent with no odor. After being stored at 54℃ for 14 days, the finished product remains colorless and transparent with no odor. The glyphosate content, ammonium ion content and other physicochemical indicators are all qualified.

[0051] Comparative Example 1 (1) Add 23% NaOH solution to the flash water of ammonium chloride, adjust the pH to 9.0, and add magnesium sulfate and dipotassium hydrogen phosphate (molar ratio of Mg to Mg). 2+ NH4 + :PO4 3- = (1.0:1.0:1.0), first stir quickly for 2 minutes, then stir slowly for 30 minutes. After standing for 2 hours, filter the precipitate and keep the filtrate for later use.

[0052] (2) Soak the Rohm and Haas IRA96 RF weak base anion exchange resin in 5% NaOH solution for 2 hours until the resin is converted to the OH⁻ form, then rinse with deionized water until neutral. Pack the resin into the ion exchange column, avoiding air bubbles. Pass the above filtrate through the resin column at a flow rate of 1.5 BV / h. Acetate ions are adsorbed, and the treated ammonium chloride flash water is obtained.

[0053] (3) Add 387.02g of treated ammonium chloride flash water to a 1000mL four-necked flask, add 315.79g of 95% glyphosate technical grade, start stirring, add ammonia water (so that the molar ratio of ammonia water to glyphosate is 1.8:1.0), so that glyphosate reacts to form salt.

[0054] (4) Add 80g of adjuvant to the glyphosate ammonium salt mother liquor to prepare 33% glyphosate ammonium salt solution. The finished product is colorless and transparent with a sour taste. The glyphosate content, ammonium ion content and other physicochemical indicators are all qualified. However, after the finished product is stored at 54℃ for 14 days, the appearance turns brown, a small amount of suspended matter is produced, and the sour taste intensifies.

[0055] Comparative Example 2 (1) Add 23% NaOH solution to ammonium chloride flash water, adjust the pH to 10.0, and add magnesium sulfate and disodium hydrogen phosphate (molar ratio of Mg to Mg). 2+ NH4 + :PO4 3- = (1.0:1.0:1.0), first stir quickly for 2 minutes, then stir slowly for 30 minutes. After standing for 2 hours, filter the precipitate and keep the filtrate for later use.

[0056] (2) Soak Mitsubishi WA30LL weak base anion exchange resin in 5% NaOH solution for 2 hours until the resin is converted to OH⁻ form, then rinse with deionized water until neutral. Pack the resin into the ion exchange column, avoiding air bubbles. Pass the above filtrate through the resin column at a flow rate of 1.5 BV / h. Acetate ions are adsorbed, and treated ammonium chloride flash water is obtained.

[0057] (3) Add 399.09g of treated ammonium chloride flash distilled water to a 1000mL four-necked flask, add 315.79g of 95% glyphosate technical grade, start stirring, add ammonia water (so that the molar ratio of ammonia water to glyphosate is 1.7:1.0), so that glyphosate reacts to form salt.

[0058] (4) Add 80g of adjuvant to the glyphosate ammonium salt mother liquor to prepare 33% glyphosate ammonium salt solution. The finished product is colorless and transparent with a sour taste. The glyphosate content, ammonium ion content and other physicochemical indicators are all qualified. However, after the finished product is stored at 54℃ for 14 days, the appearance turns brown, a small amount of suspended matter is produced, and the sour taste intensifies.

[0059] Comparative Example 3 (1) Add 23% NaOH solution to the flash water of ammonium chloride, adjust the pH to 9.0, and add magnesium sulfate and dipotassium hydrogen phosphate (molar ratio of Mg to Mg). 2+ NH4 + :PO4 3- = (1.3:1.0:1.0), stir rapidly for 2 minutes, then stir slowly for 30 minutes. After standing for 3 hours, filter the precipitate and keep the filtrate for later use.

[0060] (2) Lanxess MP62 weak base macroporous anion exchange resin was packed into an ion exchange column, and the above filtrate was passed through the resin column at a flow rate of 1 BV / h to obtain the treated ammonium chloride flash water.

[0061] (3) Add 435.29g of treated ammonium chloride flash water to a 1000mL four-necked flask, add 315.79g of 95% glyphosate technical grade, start stirring, add ammonia water (so that the molar ratio of ammonia water to glyphosate is 1.4:1.0), so that glyphosate reacts to form salt.

[0062] (4) Add 80g of adjuvant to the glyphosate ammonium salt mother liquor to prepare 33% glyphosate ammonium salt solution. The finished product is colorless and transparent with a sour taste. The glyphosate content, ammonium ion content and other physicochemical indicators are all qualified. However, after the finished product is stored at 54℃ for 14 days, the appearance turns brown, a small amount of suspended matter is produced, and the sour taste intensifies.

[0063] The test results of Examples 1 to Comparative Examples 3 are shown in the table below:

Claims

1. A method for removing impurities from ammonium chloride flash water, characterized in that, Includes the following steps: (1) Removal of ammonia nitrogen from ammonium chloride flash water: After adjusting the pH of ammonium chloride flash water to alkaline with alkali, magnesium salt and phosphate are added to generate magnesium ammonium phosphate precipitate. After stirring, crystallization, settling and filtration, magnesium ammonium phosphate is obtained and the filtrate is used for later use. (2) Removal of acetate ions from ammonium chloride flash water: The filtrate is passed through a resin column to remove acetate ions, resulting in purified ammonium chloride flash water.

2. The method for removing impurities from ammonium chloride flash water according to claim 1, characterized in that, The alkali mentioned in step (1) is NaOH or KOH, with the NaOH concentration ranging from 15% to 32% and the KOH concentration ranging from 15% to 48%; the pH range is 9.0 to 11.

0.

3. The method for removing impurities from ammonium chloride flash water according to claim 1, characterized in that, The magnesium salt is one or more of magnesium chloride, magnesium sulfate, and magnesium carbonate, and the phosphate is one or more of disodium hydrogen phosphate, dipotassium hydrogen phosphate, and sodium tripolyphosphate; Mg is present in a molar ratio of... 2+ :NH4 + :PO4 3- = (1.0~1.3):1.0:1.0 Add magnesium salt and phosphate.

4. The method for removing impurities from ammonium chloride flash water according to claim 1, characterized in that, The resin in the resin column is selected from strongly basic anion exchange resins, including any one of SA10ALLP, MARATHON™A, IRA458RF CI, and Amberlite IRA-400.

5. The method for removing impurities from ammonium chloride flash water according to claim 4, characterized in that, The strongly basic anion exchange resin is soaked in NaOH solution for a period of time until the resin is converted to OH-. - After rinsing with deionized water until neutral, the resin is then packed into an ion exchange column.

6. The method for removing impurities from ammonium chloride flash water according to claim 5, characterized in that, The mass concentration of the NaOH solution is in the range of 4% to 10%; the resin soaking time is 2 to 4 hours; and the flow rate of the ammonium chloride flash distillate through the resin column is 1-2 BV / h.

7. A method for preparing glyphosate ammonium salt solution, characterized in that, Includes the method described in any one of claims 1-6; Glyphosate technical material is added to the purified ammonium chloride flash water prepared by the above method, and a certain amount of ammonia water is added to react the glyphosate into salt to obtain glyphosate ammonium salt mother liquor; Adding adjuvants to glyphosate ammonium salt mother liquor yields glyphosate ammonium salt solution.

8. The method for preparing glyphosate ammonium salt solution according to claim 7, characterized in that, The molar ratio of ammonia to glyphosate is (1.1~2.0):1.

0.

9. The method for preparing glyphosate ammonium salt solution according to claim 7, characterized in that, The mass of the added additive is in the range of 5% to 12%.

10. The method for preparing glyphosate ammonium salt solution according to claim 9, characterized in that, The adjuvant is an alkyl glycoside.

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