MCPA (2-methyl-4-chlorophenoxyacetic acid)-glyphosate soluble concentrate and preparation method thereof

Abstract

The invention discloses a 2-methyl-4-chlorophenoxyacetic acid glyphosate soluble concentrate and a preparation method thereof. The 2-methyl-4-chlorophenoxyacetic acid glyphosate soluble concentrate is prepared from the following raw materials: 60.9%-67.4% of glyphosate isopropylamine salt, 3.2%-6.3% of 2-methyl-4-chlorophenoxyacetic acid, 8%-12% of an auxiliary agent and the balance of water, and the auxiliary agent is prepared from a cosolvent, a synergist and water. The preparation method comprises the following steps: firstly, mixing 2-methyl-4-chloro-phenoxyacetic acid with the auxiliary agent, then mixing with the glyphosate isopropylamine salt and water, and filtering to obtain the 2-methyl-4-chloro-phenoxyacetic acid glyphosate soluble concentrate. The 2-methyl-4-chloro-phenoxyacetic acid glyphosate soluble concentrate prepared by the invention has the advantages of low temperature resistance, thermal storage resistance, stable product quality, meeting of environmental protection requirements, fast weeding speed, thorough weeding and better weeding effect.

Description

Technical Field

[0001] The invention belongs to the technical field of herbicides, and particularly relates to a soluble solution of 2-methyl-4-chloro-glyphosate and a preparation method thereof. Background Art

[0002] 2-Methyl-4-chloro-glyphosate is a compound herbicide made of 2-Methyl-4-chloro-1-ol and glyphosate. 2-Methyl-4-chloro-1-ol is a phenoxyacetic acid selective systemic hormone-type herbicide. After being absorbed by weeds, it can destroy the conductive tissue of dicotyledonous plants, disrupting their growth and development, causing the stems and leaves to twist, and the stem base to swell and thicken or crack. This causes the weeds to die; glyphosate is an organophosphorus systemic herbicide. After spraying, it is absorbed by the stems and leaves, inhibiting the synthesis of various enzymes in the weeds, disrupting the synthesis of proteins and causing the weeds to die. After the two are compounded, they make up for the shortcomings of each single agent, with a wider weed control range, faster weed control speed, faster weed killing, and a cheaper price.

[0003] Chinese patent CN1685823A discloses a herbicidal composition, which is prepared by using glyphosate isopropylamine salt and 2-methyl-4-chloroisopropylamine salt as active ingredients and adding surfactants, wherein the weight ratio of glyphosate isopropylamine salt to 2-methyl-4-chloroisopropylamine salt is 3-15:1, and the surfactant can be an alkyl polysaccharide, ethoxylated tallow amine and other pesticide-acceptable surfactants, which can increase the spread and penetration of the pesticide, thereby better exerting the efficacy; the compound herbicide can not only expand the weed control spectrum and improve the weed control effect, but also effectively reduce the weed control cost.

[0004] Chinese patent CN101406202A discloses a compound herbicide and a herbicide composition, which is composed of glyphosate herbicides and dimethoate and its sodium salt, wherein the weight percentage of the glyphosate herbicides is 2-98%, and the glyphosate herbicides include glyphosate, glyphosate isopropylamine salt, glyphosate ammonium salt, glyphosate sodium salt and glyphosate potassium salt; the dimethoate salt is dimethoate sodium. The herbicide composition can effectively control annual weeds, perennial weeds, sedge weeds and dicotyledonous weeds. Compared with the use of glyphosate and dimethoate herbicides alone, the usage is reduced, and the control effect is significant, which can save about 25% of the usage.

[0005] In actual production, 2-Methyl-4-chloro-4-ylchlor and glyphosate are often processed into isopropylamine salts, which are further made into soluble solutions by adding auxiliary ingredients such as emulsifiers and isopropyl alcohol and water. However, this production method involves steps such as passing amine and heat preservation. The process is cumbersome and time-consuming, and requires a large amount of isopropylamine and isopropyl alcohol. The cost is high, and the quality of the products produced is unstable in a low-temperature environment, and is prone to quality problems such as crystallization and stratification. Summary of the invention

[0006] In view of the above technical problems, the present invention provides a 2-methyl-4-chloro-glyphosate soluble solution and a preparation method thereof. Glyphosate isopropylamine salt and 2-methyl-4-chloro-glyphosate are mixed and the soluble solution is prepared with the help of an auxiliary agent. The soluble solution does not require steps such as passing amine, and the prepared product is resistant to low temperature and heat storage, has stable product quality, meets environmental protection requirements, and has a fast and thorough weed killing speed and better weed killing effect.

[0007] In order to achieve the above object, the present invention provides a 2-methyl-4-chloro-glyphosate soluble solution, which is composed of the following raw materials, calculated by weight percentage: 60.9%-67.4% of glyphosate isopropylamine salt, 3.2%-6.3% of 2-methyl-4-chloro-glyphosate, 8%-12% of auxiliary agent, and 100% of water.

[0008] Preferably, the auxiliary agent consists of a co-solvent and a synergist.

[0009] Further preferably, the mass percentage of the co-solvent in the auxiliary agent is 80%, the mass percentage of the synergist is 0.5-2%, and the balance is water.

[0010] More preferably, the co-solvent is selected from a combination of palm kernel oleamide, sodium lauryl polyether sulfate, alkylphenol polyoxyethylene ether, polydimethylsiloxane, cocamidopropyl betaine, phenoxyethanol, polyethylene glycol, triethanolamine, ethylene glycol, sodium benzoate, coco-glucoside, and castor oil.

[0011] More preferably, the formula of the cosolvent is 4-8% palm kernel oleamide, 20-40% polyethylene glycol, 10-20% cocamidopropyl betaine, 5-8% polydimethylsiloxane, and 100% water.

[0012] More preferably, the formula of the cosolvent can also be 4-6% sodium laureth sulfate, 30-40% triethanolamine, 15-20% alkylphenol polyoxyethylene ether, 5-8% phenoxyethanol, and 100% water.

[0013] More preferably, the formula of the co-solvent can also be 5-7% alkylphenol polyoxyethylene ether, 10-15% ethylene glycol, 50-60% coconut glucoside, 5-8% castor oil, and 100% water.

[0014] More preferably, the synergist is any one of gibberellin, abscisic acid, polyglutamic acid, tryptophan, brassinolide, ethephon, uniconazole and humic acid.

[0015] Preferably, the mass fraction of the glyphosate isopropylamine salt is 62%.

[0016] Preferably, the mass fraction of glyphosate in the 2-methyl-4-chloro-glyphosate soluble solution is 28-31%, and the mass fraction of 2-methyl-4-chloro-glyphosate is 3-6%. The present invention also provides a method for preparing a soluble solution of 2-methyl-4-chloro-glyphosate, comprising the following steps: (1) Mixing the co-solvent and the synergist to obtain an additive; (2) Mix 2-methyl-4-chloro-4-nitropropene with the additive until the solution becomes transparent; (3) adding glyphosate isopropylamine salt parent drug and water, and mixing to obtain a solution; (4) The solution is filtered to obtain a soluble solution of 2-methyl-4-chloro-glyphosate.

[0017] Preferably, during the mixing in step (2), the solution is heated to 30-50°C.

[0018] The beneficial effects of the present invention are: 1. Directly mix glyphosate isopropylamine salt and 2-Methyl-4-chloro-1-yl ...

[0019] 2. The auxiliary agent composed of a solvent and a synergist is used to speed up the mixing speed of glyphosate isopropylamine salt and 2-Methyl-4-chloro-1-ylchloride. At the same time, the synergist can cooperate with 2-Methyl-4-chloro-1-ylchloride to carry out weed control, thereby enhancing the weed control effect, speeding up the weed control speed, and making the weed control more thorough.

[0020] 3. The soluble solution of 2-methyl-4-chloro-glyphosate prepared by the present invention is resistant to low temperature and heat storage, has stable product quality, meets environmental protection requirements, and has broad application prospects. DETAILED DESCRIPTION

[0021] The technical solution of the present invention is further explained below in conjunction with specific embodiments. It is worth noting that the following embodiments are only preferred embodiments of the present invention and should not be construed as limiting the present invention. The protection scope of the present invention shall be subject to the contents recorded in the claims. Any modification or replacement made by a person skilled in the art to the technical solution of the present invention without creative work shall fall within the protection scope of the present invention.

[0022] Example 1 A 2-methyl-4-chloro-1-nitropropene·glyphosate soluble solution, the formula of which is 5.9% of 2-methyl-4-chloro-1-nitropropene raw powder (purity of 95%), 8% of auxiliary agent, 66% of glyphosate isopropylamine salt mother drug (purity of 62%), and water supplemented to 100%, wherein the auxiliary agent is composed of 80% of auxiliary solvent, 0.5% of synergist and 19.5% of water; wherein the auxiliary solvent comprises 4% of palm kernel oil amide, 20% of polyethylene glycol, 10% of cocamidopropyl betaine, 5% of polydimethylsiloxane, and water supplemented to 100%; the synergist is gibberellin.

[0023] Preparation method: (1) Preparation of cosolvent: 4% palm kernel oleamide, 20% polyethylene glycol, 10% cocamidopropyl betaine, and 5% polydimethylsiloxane are placed in water, and the mixture is made up to 100% with water, and mixed evenly to obtain a cosolvent; (2) Preparation of additives: 80% of the cosolvent and 0.5% of gibberellin are placed in water, and then added with water to 100%, and mixed evenly to obtain the additive; (3) Place 5.9% of 2-methyl-4-chloro-1-nitropropene powder and 8% of the auxiliary agent in a reaction kettle, stir and mix at 30°C to obtain a transparent solution; (4) Add 66% glyphosate isopropylamine salt stock to the transparent solution in the reactor, add water to 100%, and stir for 30 minutes to obtain a mixed solution; (5) The mixed solution is filtered to obtain a soluble solution of 2-methyl-4-chloro-glyphosate.

[0024] Example 2 A 2-methyl-4-chloro-glyphosate soluble solution is provided, wherein the formula is 5.9% of 2-methyl-4-chloro-1-yl original powder (with a purity of 95%), 12% of an auxiliary agent (including 80% of a cosolvent and 0.5% of gibberellin), 66% of a glyphosate isopropylamine salt parent drug (with a purity of 62%), and water is added to 100%. The formula of the cosolvent is the same as that of Example 1, and the preparation method is the same as that of Example 1.

[0025] Example 3 A 2-methyl-4-chloro-glyphosate soluble solution, the formula of which is 5.9% of 2-methyl-4-chloro-1-yl original powder (purity is 95%), 8% of an auxiliary agent (including 80% of a solvent and 0.5% of abscisic acid), 66% of a glyphosate isopropylamine salt mother drug (purity is 62%), and water is added to 100%. The formula of the solvent is the same as that of Example 1, and the preparation method is the same as that of Example 1.

[0026] Example 4 A 2-methyl-4-chloro-glyphosate soluble solution, the formula of which is 5.9% of 2-methyl-4-chloro-1-yl original powder (purity is 95%), 12% of an auxiliary agent (including 80% of a cosolvent and 0.5% of abscisic acid), 66% of a glyphosate isopropylamine salt mother drug (purity is 62%), and water is added to 100%. The formula of the cosolvent is the same as that in Example 1, and the preparation method is the same as that in Example 1.

[0027] Example 5 A 2-methyl-4-chloro-glyphosate soluble solution, the formula of which is 5.9% of 2-methyl-4-chloro-1-yl original powder (purity is 95%), 8% of an auxiliary agent (including 80% of a cosolvent and 0.5% of polyglutamic acid), 66% of a glyphosate isopropylamine salt parent drug (purity is 62%), and water is added to 100%. The formula of the cosolvent is the same as that in Example 1, and the preparation method is the same as that in Example 1.

[0028] Example 6 A 2-methyl-4-chloro-glyphosate soluble solution, the formula of which is 5.9% of 2-methyl-4-chloro-1-yl original powder (purity is 95%), 12% of an auxiliary agent (including 80% of a cosolvent and 0.5% of polyglutamic acid), 66% of a glyphosate isopropylamine salt parent drug (purity is 62%), and water is added to 100%. The formula of the cosolvent is the same as that in Example 1, and the preparation method is the same as that in Example 1.

[0029] Example 7 A 2-methyl-4-chloro-glyphosate soluble solution, the formula of which is 5.9% of 2-methyl-4-chloro-1-yl original powder (purity is 95%), 8% of an auxiliary agent (including 80% of a cosolvent and 0.5% of tryptophan), 66% of a glyphosate isopropylamine salt mother drug (purity is 62%), and water is added to 100%. The formula of the cosolvent is the same as that in Example 1, and the preparation method is the same as that in Example 1.

[0030] Example 8 A 2-methyl-4-chloro-glyphosate soluble solution, the formula of which is 5.9% of 2-methyl-4-chloro-1-yl original powder (purity is 95%), 12% of an auxiliary agent (including 80% of a cosolvent and 0.5% of tryptophan), 66% of a glyphosate isopropylamine salt mother drug (purity is 62%), and water is added to 100%. The formula of the cosolvent is the same as that in Example 1, and the preparation method is the same as that in Example 1.

[0031] Example 9 A 2-methyl-4-chloro-glyphosate soluble solution, the formula of which is 5.9% of 2-methyl-4-chloro-1-yl original powder (purity is 95%), 8% of an auxiliary agent (including 80% of a cosolvent and 0.5% of brassinolide), 66% of a glyphosate isopropylamine salt mother drug (purity is 62%), and water is added to 100%. The formula of the cosolvent is the same as that in Example 1, and the preparation method is the same as that in Example 1.

[0032] Example 10 A 2-methyl-4-chloro-1-nitropropene·glyphosate soluble solution, the formula of which is 5.9% of 2-methyl-4-chloro-1-nitropropene raw powder (purity is 95%), 12% of auxiliary agent (including 80% of auxiliary solvent and 0.5% of brassinolide), 66% of glyphosate isopropylamine salt mother drug (purity is 62%), and water is added to 100%. The preparation method is the same as that of Example 1; wherein the auxiliary solvent formula is 4% of sodium lauryl polyether sulfate, 30% of triethanolamine, 15% of alkylphenol polyoxyethylene ether, 5% of phenoxyethanol, and water is added to 100%. The preparation method is the same as that of Example 1.

[0033] Embodiment 11 A 2-methyl-4-chloro-glyphosate soluble solution is prepared by 5.9% of 2-methyl-4-chloro-1-yl original powder (with a purity of 95%), 8% of an auxiliary agent (including 80% of a cosolvent and 0.5% of ethephon), 66% of a glyphosate isopropylamine salt parent drug (with a purity of 62%), and water is added to 100%. The cosolvent formula is the same as that in Example 10, and the preparation method is the same as that in Example 1.

[0034] Example 12 A 2-methyl-4-chloro-glyphosate soluble solution is provided, wherein the formula is 5.9% of 2-methyl-4-chloro-1-yl original powder (purity is 95%), 12% of an auxiliary agent (including 80% of a cosolvent and 0.5% of ethephon), 66% of a glyphosate isopropylamine salt parent drug (purity is 62%), and water is added to 100%. The formula of the cosolvent is the same as that of Example 10, and the preparation method is the same as that of Example 1.

[0035] Embodiment 13 A 2-methyl-4-chloro-glyphosate soluble solution is provided, wherein the formula is 5.9% of 2-methyl-4-chloro-1-yl original powder (with a purity of 95%), 8% of an auxiliary agent (including 80% of a cosolvent and 0.5% of oxathiocarbazole), 66% of a glyphosate isopropylamine salt parent drug (with a purity of 62%), and water is added to 100%. The formula of the cosolvent is the same as that of Example 10, and the preparation method is the same as that of Example 1.

[0036] Embodiment 14 A 2-methyl-4-chloro-glyphosate soluble solution is provided, wherein the formula is 5.9% of 2-methyl-4-chloro-1-yl original powder (with a purity of 95%), 12% of an auxiliary agent (including 80% of a cosolvent and 0.5% of oxathiocarbazole), 66% of a glyphosate isopropylamine salt parent drug (with a purity of 62%), and water is added to 100%. The formula of the cosolvent is the same as that of Example 10, and the preparation method is the same as that of Example 1.

[0037] Embodiment 15 A 2-methyl-4-chloro-glyphosate soluble solution, the formula of which is 5.9% of 2-methyl-4-chloro-1-yl original powder (purity is 95%), 8% of auxiliary agent (including 80% of auxiliary solvent and 0.5% of humic acid), 66% of glyphosate isopropylamine salt mother drug (purity is 62%), and water is added to 100%. The preparation method is the same as that of Example 1; wherein the auxiliary solvent formula is 5% of alkylphenol polyoxyethylene ether, 10% of ethylene glycol, 50% of coconut oil glucoside, 5% of castor oil, and water is added to 100%. The preparation method is the same as that of Example 1.

[0038] Example 16 A 2-methyl-4-chloro-glyphosate soluble solution, the formula of which is 5.9% of 2-methyl-4-chloro-1-yl original powder (purity is 95%), 12% of an auxiliary agent (including 80% of a cosolvent and 0.5% of humic acid), 66% of a glyphosate isopropylamine salt mother drug (purity is 62%), and water is added to 100%. The cosolvent formula is the same as that in Example 17, and the preparation method is the same as that in Example 1.

[0039] Comparative Example 1 A 2-methyl-4-chloro-glyphosate soluble solution is provided, wherein the formula is 5.9% of 2-methyl-4-chloro-1-yl original powder (with a purity of 95%), 8% of an auxiliary agent (including 80% of a co-solvent and excluding a synergist), 66% of a glyphosate isopropylamine salt mother drug (with a purity of 62%), and water is added to 100%. The formula of the co-solvent is the same as that in Example 1, and the preparation method is the same as that in Example 1.

[0040] Comparative Example 2 A 2-methyl-4-chloro-glyphosate soluble solution is provided, wherein the formula is 5.9% of 2-methyl-4-chloro-1-yl original powder (with a purity of 95%), 6% of an auxiliary agent (including 80% of a cosolvent and 0.5% of gibberellin), 66% of a glyphosate isopropylamine salt parent drug (with a purity of 62%), and water is added to 100%. The formula of the cosolvent is the same as that of Example 1, and the preparation method is the same as that of Example 1.

[0041] Comparative Example 3 A 2-methyl-4-chloro-glyphosate soluble solution is provided, wherein the formula is 5.9% of 2-methyl-4-chloro-1-yl original powder (with a purity of 95%), 14% of an auxiliary agent (including 80% of a cosolvent and 0.5% of gibberellin), 66% of a glyphosate isopropylamine salt parent drug (with a purity of 62%), and water is added to 100%. The formula of the cosolvent is the same as that of Example 1, and the preparation method is the same as that of Example 1.

[0042] Comparative Example 4 A 2-methyl-4-chloro-glyphosate soluble solution is provided, wherein the formula is 5.9% of 2-methyl-4-chloro-1-yl original powder (with a purity of 95%), 8% of an auxiliary agent (including 75% of a cosolvent and 0.5% of gibberellin), 66% of a glyphosate isopropylamine salt parent drug (with a purity of 62%), and water is added to 100%. The formula of the cosolvent is the same as that of Example 1, and the preparation method is the same as that of Example 1.

[0043] Comparative Example 5 A 2-methyl-4-chloro-glyphosate soluble solution is provided, wherein the formula is 5.9% of 2-methyl-4-chloro-1-yl original powder (with a purity of 95%), 8% of an auxiliary agent (including 85% of a cosolvent and 0.5% of gibberellin), 66% of a glyphosate isopropylamine salt parent drug (with a purity of 62%), and water is added to 100%. The formula of the cosolvent is the same as that of Example 1, and the preparation method is the same as that of Example 1.

[0044] Comparative Example 6 A 2-methyl-4-chloro-glyphosate soluble solution is provided, wherein the formula is 5.9% of 2-methyl-4-chloro-1-yl original powder (with a purity of 95%), 8% of an auxiliary agent (including 80% of a cosolvent and 5% of gibberellin), 66% of a glyphosate isopropylamine salt parent drug (with a purity of 62%), and water is added to 100%. The formula of the cosolvent is the same as that of Example 1, and the preparation method is the same as that of Example 1.

[0045] Comparative Example 7 A 2-methyl-4-chloro-glyphosate soluble solution, the formula of which is 5.9% of 2-methyl-4-chloro-1-yl original powder (purity of 95%), 4.8% of isopropylamine, 66% of glyphosate isopropylamine salt mother drug (purity of 62%), and water is added to 100%. The preparation method thereof is as follows: (1) Place 5.9% of 2-Methyl-4-chlorobenzene powder and an appropriate amount of water in a reaction kettle, add isopropylamine dropwise while stirring, and wait until the 2-Methyl-4-chlorobenzene is completely dissolved to obtain a transparent solution; (2) Add 66% glyphosate isopropylamine salt stock into the reactor, add water to 100%, and stir for 30 minutes to obtain a mixed solution; (3) The mixed solution is filtered to obtain a soluble solution of 2-methyl-4-chloro-glyphosate.

[0046] Comparative Example 8 A 2-methyl-4-chloro-glyphosate soluble solution, the formula of which is 5.9% of 2-methyl-4-chloro-1-yl original powder (purity of 95%), 8% of auxiliary agent (including 80% of auxiliary solvent and 20% of water), 0.04% of gibberellin, 66% of glyphosate isopropylamine salt parent drug (purity of 62%), and water is added to 100%. The preparation method thereof is as follows: (1) Obtain a cosolvent according to the preparation method of Example 1; (2) Take 80% of the solvent and 20% of water and mix them evenly to obtain the additive; (3) 8% of the auxiliary agent and 5.9% of the 2-methyl-4-chlorobenzene original powder were placed in a reaction kettle, and stirred at 30°C to obtain a transparent solution; (4) Add 66% glyphosate isopropylamine salt mother drug and 20.06% water to the transparent solution in the reactor, stir for 30 minutes, then add 0.04% gibberellin, stir for 30 minutes to obtain a mixed solution; (5) The mixed solution is filtered to obtain a soluble solution of 2-methyl-4-chloro-glyphosate.

[0047] Embodiment 17 The 2-methyl-4-chloro-glyphosate soluble concentrate prepared in the above examples and comparative examples was tested for relevant indicators according to the enterprise standard method of "Q / HTS 31-2023 36% 2-methyl-4-chloro-glyphosate soluble concentrate". The relevant performance data are shown in Table 1.

[0048] Table 1 Quality test results of 2-Methyl-4-chloro-glyphosate soluble solution

[0049] The results are shown in Table 1: Examples 1-22 and Comparative Examples 1 and 8 can obtain 2-methyl-4-chloro-glyphosate soluble solutions with stable quality, indicating that adding a synergist to the 2-methyl-4-chloro-glyphosate soluble solution has no effect on its quality stability. When the content of the adjuvant is too low, the product's heat storage stability and low-temperature storage stability are both poor, and stratification or crystallization occurs after storage for 3 months (Comparative Example 2); when the content of the adjuvant is further increased, there is no effect on the low-temperature storage stability, but stratification occurs after 3 months of hot storage, affecting its quality stability (Comparative Example 3).

[0050] Embodiment 18 The 2-methyl-4-chloro-glyphosate soluble solution prepared in the above examples and comparative examples and with stable quality was used for field efficacy experiments. The main weeds in the field were barnyard grass (late jointing stage), crabgrass (heading stage), chicory (5-6 leaf stage), Bidens pilosa (4-5 branch stage), etc. The application method was: each treatment was treated with 400 ml / mu of water and the stems and leaves of the weeds were sprayed. The weed control effect of each treatment on the weeds was evaluated by observing the weed damage symptoms in each treatment area 7 days, 15 days, and 30 days after the application.

[0051] Table 2 The control effect of 2-methyl-4-chloro-glyphosate soluble solution on weeds (7 days after application)

[0052] Note: The commercially available product is 36% 2-Methyl-4-chloro-glyphosate soluble concentrate (the same below) from Shandong Aokun Crop Science Co., Ltd. Table 32 The control effect of 4-chloro-1-methyl-glyphosate soluble solution on weeds (15 days after application)

[0053] Table 42 The control effect of 4-chloro-1-methyl-glyphosate soluble solution on weeds (30 days after application)

[0054] The results are shown in Table 2, Table 3 and Table 4: Under the same dosage, the 2-methyl-4-chloro-glyphosate soluble solution prepared in Example 1-22 has a good control effect on weeds 7 days after application, and has an overall control effect on various weeds 30 days after application, and the root system shows a dry or rotten state, while the weed control effect of the commercially available product is slow, and the control effect on the root system is poor. The weed root system remains fresh 30 days after application, and the thorough weed control effect is not achieved; no synergist is used in Comparative Example 1, and thorough weed control cannot be achieved 30 days after application. In Comparative Example 8, the synergist is added at the last link in the production process, and the product produced is also slow to take effect on weed control and the weed control is not thorough. In summary, the 2-methyl-4-chloro-soluble solution prepared in Example 1-22 has a faster weed control speed, a more thorough weed control, and a better control effect than the commercially available product.

Claims

1. A soluble solution of 2-methyl-4-chloro-glyphosate, characterized in that: Calculated by weight percentage, the composition is composed of the following raw materials: 60.9%-67.4% of glyphosate isopropylamine salt, 3.2%-6.3% of 2-methyl-4-chloro-1-yl, 8%-12% of auxiliary agent, and 100% of water.

2. A soluble solution of 2-methyl-4-chloro-glyphosate according to claim 1, characterized in that: The auxiliary agent consists of a co-solvent, a synergist and water.

3. A soluble solution of 2-methyl-4-chloro-glyphosate according to claim 2, characterized in that: The mass percentage of the cosolvent in the auxiliary agent is 80%, the mass percentage of the synergist is 0.5-2%, and the balance is water.

4. A soluble solution of 2-methyl-4-chloro-glyphosate according to claim 3, characterized in that: The cosolvent is selected from a combination of palm kernel oleamide, sodium laureth sulfate, alkylphenol polyoxyethylene ether, polydimethylsiloxane, cocamidopropyl betaine, phenoxyethanol, polyethylene glycol, triethanolamine, ethylene glycol, sodium benzoate, cocoyl glucoside, and castor oil.

5. A soluble solution of 2-methyl-4-chloro-glyphosate according to claim 3, characterized in that: The synergist is any one of gibberellins, abscisic acid, polyglutamic acid, tryptophan, brassinolide, ethephon, uniconazole and humic acid.

6. A soluble solution of 2-methyl-4-chloro-glyphosate according to claim 1, characterized in that: The mass fraction of the glyphosate isopropylamine salt is 62%.

7. A soluble solution of 2-methyl-4-chloro-glyphosate according to claim 1, characterized in that: The mass fraction of glyphosate in the 2-Methyl-4-chloro-glyphosate soluble solution is 28-31%, and the mass fraction of 2-Methyl-4-chloro-glyphosate is 3-6%.

8. A method for preparing a soluble solution of 2-methyl-4-chloro-glyphosate as claimed in any one of claims 1 to 7, characterized in that: The steps include: (1) Mixing the co-solvent and the synergist to obtain an additive; (2) Mix 2-methyl-4-chloro-4-nitropropene with the additive until the solution becomes transparent; (3) adding glyphosate isopropylamine salt and water, and mixing to obtain a solution; (4) The solution is filtered to obtain a soluble solution of 2-methyl-4-chloro-glyphosate.

9. The preparation method according to claim 8, characterized in that: During the mixing in step (2), the solution is heated to 30-50°C.

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