14 results about "Hexazinone" patented technology

The invention discloses a hexazinone preparation and a preparation method thereof, and belongs to the technical field of pesticide chemistry. The preparation method comprises the following steps: S1, preparing BC: adding BC, mixing and grinding with copper sulfate pentahydrate, putting into a tubular furnace, calcining, and cooling to obtain Cu-BC; s2, adding a modified silane coupling agent into an ethanol water solution, then adding the Cu-BC obtained in S1, stirring for 6-8 hours at 25-35 DEG C, filtering, washing and drying to obtain modified Cu-BC; s3, hexazinone is dissolved in absolute ethyl alcohol, then the modified Cu-BC is added, ultrasonic dispersion is conducted for 6-8 h, filtering, centrifugal washing and freeze-drying are conducted, and the hexazinone preparation is obtained. According to the preparation method of the hexazinone preparation, the slow release capacity of the preparation can be improved, the hexazinone utilization rate is increased, meanwhile, the preparation can be endowed with the sterilization effect, and the hexazinone preparation has wide application prospects.

This invention belongs to the field of cycloazinone preparation technology, and provides a high-yield cycloazinone synthesis process, including the following steps: Step 1: N-ethoxycarbonyl-N,N,N-trimethylguanidine and a solid-phase catalyst are added to toluene and stirred evenly. Under nitrogen protection, the temperature is raised to 40-60°C, and a cyclohexyl isocyanate toluene solution is added dropwise. Stirring is continued for 2-4 hours. The solid-phase catalyst is recovered by filtration, and the mixture is concentrated under reduced pressure to obtain N-cyclohexylcarbamoyl-N-ethoxycarbonyl-N,N,N-trimethylguanidine; Step 2: Under nitrogen protection, the temperature is raised to 50-60°C, and the N-cyclohexylcarbamoyl-N-ethoxycarbonyl-N,N,N-trimethylguanidine toluene solution is added dropwise to a sodium methoxide toluene solution and stirred for 1-2 hours. The temperature is lowered to room temperature, and glacial acetic acid is added for neutralization. After washing, the mixture is concentrated under reduced pressure, and a crystallizing agent is added. The temperature is lowered to 0-5°C, and the mixture is stirred for crystallization for 2-4 hours. After filtration and washing, the mixture is dried under vacuum to obtain the finished cycloazinone.

The invention discloses a purification process of hexazinone production wastewater, and relates to the technical field of wastewater treatment. The process comprises the following steps: introducing wastewater of a hexazinone production process into an enamel microfiltration reactor for reaction, and filtering out pretreated wastewater; the pretreated wastewater is pumped into a graphite condensation type oxidation tower, a composite catalyst composed of a sodium methoxide methanol solution and methyl chloroformate is added for a reaction, and oxygenated wastewater is obtained; adjusting the pH value of the wastewater subjected to oxygen catalysis to 7.0-7.5, introducing the wastewater into a biological denitrification reaction tank, and adding a microbial agent compounded by nitrifying bacteria and denitrifying bacteria for reaction to obtain purified wastewater; refluxing 80% of the purified wastewater to a raw material preparation process for hexazinone production for reuse, and discharging the remaining 20% of the purified wastewater after being detected to be qualified; according to the invention, a grading process of pretreatment, catalytic oxidation, biological denitrification and reclaimed water reuse is designed, so that deep purification of high-ammonia-nitrogen COD wastewater is realized.

The invention discloses a herbicide for saccharum arundinaceum as well as a preparation method and application thereof. The herbicide for saccharum arundinaceum is prepared from a glyphosate isopropylamine salt aqueous solution and hexazinone granules, wherein the mass ratio of the effective components of the glyphosate isopropylamine salt aqueous solution to the effective components of the hexazinone granules is 1: (0.09-23.39). The herbicide for saccharum arundinaceum is prepared from glyphosate and hexazinone, and the nano-scale biochar, ferulic acid, dopamine hydrochloride, sodium alginate and calcium chloride are used for preparing the nano-auxiliary agent with adhesion, so that scientific and effective prevention and removal of saccharum arundinaceum in a dam region are guaranteed; and the labor intensity and the safety risk of workers in the dam region saccharum arundinaceum prevention and control area of the hydro-junction project with steep gradient and large height difference can be reduced. The herbicide provided by the invention fills up the blank of the herbicide for preventing and controlling malignant weeds such as saccharum arundinaceum in the hydro-junction project dam area, and has important significance for ensuring scientific and effective prevention and removal of saccharum arundinaceum in the hydro-junction project dam area.

The invention relates to a railway herbicide composition and application thereof, and the railway herbicide composition is prepared from the following components in parts by weight: 60 to 120 parts of ammonium glyphosate or isopropylamine salt, 15 to 60 parts of hexazinone, and 15 to 45 parts of 4-amino-3, 5-dichloro-6-fluoro-pyridine-2-oxyacetic acid derivative or quaternary ammonium salt of the 4-amino-3, 5-dichloro-6-fluoro-pyridine-2-oxyacetic acid derivative. All the components of the railway herbicide disclosed by the invention are combined in a certain ratio range to show a remarkable synergistic interaction effect, so that the pesticide cost is greatly reduced on the whole.

The invention discloses a hexazinone-containing herbicide and a preparation method thereof, and belongs to the technical field of pesticides. The preparation method comprises the following steps: S1, preparing PEI / CS; and S2, uniformly mixing Tween-80 with a PEI / CS solution, dispersing hexazinone in DMF for ultrasonic dissolution, slowly dropwise adding the hexazinone solution into the PEI / CS solution under a magnetic stirring condition, carrying out a reaction for 30 min to obtain PEI / CS / hexazinone, dropwise adding a 2-hydroxy-4-methoxybenzophenone-5-sodium sulfonate solution into the PEI / CS / hexazinone, carrying out a stirring reaction for 30 min, and carrying out centrifugation, washing and drying to obtain the hexazinone-containing herbicide. The final product obtained by the method has high load rate, slow release stability and photodegradation resistance, the preparation efficiency is high, and the process is simple and controllable.

The invention relates to a railway herbicide composition as well as a preparation method and application thereof. The railway herbicide composition comprises a herbicide preparation and a synergistic auxiliary agent, and the railway herbicide preparation comprises the following active ingredients in parts by weight: 20-80 parts of hexazinone, 5-15 parts of aminocyclopyrachlor and 80-160 parts of carbamate components. The railway herbicide composition disclosed by the invention is a sterilant herbicide which is low in toxicity, broad in spectrum, high in efficiency and capable of preventing and removing resistant railway weeds.

The invention relates to the technical field of organic synthesis, and discloses a production process for synthesizing hexazinone. The process comprises the following steps: S1, mixing a dimethylamine solution with deionized water, dropwise adding a cyano formamide aqueous solution, carrying out heating reaction, and carrying out reduced pressure distillation and recrystallization to obtain an intermediate I; s2, dissolving the intermediate I in N-methyl pyrrolidone, dropwise adding cyclohexyl isocyanate for reaction, adding a solid-phase catalyst and potassium carbonate for cyclization reaction, and performing post-treatment on reaction liquid to obtain hexazinone; the solid-phase catalyst is prepared by bonding a quaternary ammonium salt reagent on a silanization modified mesoporous silica carrier, can be simply and conveniently recycled after reaction, and has good reusability. No side reaction is generated, high-purity hexazinone can be obtained, the reaction efficiency can be effectively improved, the process stability is excellent, and the method is suitable for industrial production.

The invention belongs to the technical field of organic synthesis, and particularly relates to a high-purity hexazinone cyclization process method. Gradient hydrolysis and chloroform directional extraction are adopted in the guanidine synthesis stage, the cyano conversion path is accurately controlled, carboxylic acid impurities are prevented from being generated through excessive hydrolysis, and the purity of the intermediate is ensured; in the cyclization step, a Fe / Co / Zn composite catalyst is used, the dispersity of active sites is improved by a supported structure, only reaction sites are directionally activated, and generation of by-products is effectively avoided; impurity wrapping is reduced through gradient cooling crystallization and precooled ethanol washing, and the purity of the product is remarkably improved; meanwhile, a phase transfer catalyst is introduced in methylation to break a mass transfer barrier, and cyclization is combined with reduced pressure distillation to remove ethanol in time to push forward movement of balance, so that the total yield of the product is improved, and the problems of difficulty in impurity removal and incomplete conversion in the traditional process are solved.

The invention discloses a hexazinone-containing efficient forest weed killer and a preparation method thereof, and belongs to the technical field of pesticides. The preparation method of the hexazinone-containing efficient forest weed killer comprises the following steps: S1, preparing a modified metal organic framework; s2, in a nitrogen atmosphere, dissolving the modified metal organic framework in deionized water, heating to 40-80 DEG C, then adding sodium lignin sulfonate to react with acrylic acid for 10-20 minutes, then adding an initiator, heating to 80-100 DEG C, reacting for 1-2 hours, cooling to room temperature, washing and drying to obtain a modified carrier; s3, dissolving hexazinone technical and the modified carrier in DMF, stirring at room temperature, centrifuging, washing and drying to obtain the herbicide. The finally obtained herbicide can realize slow release of hexazinone by virtue of a carrier, and the weeding long-term effect and the environmental safety are improved.

The present invention belongs to the technical field of chemical herbicides, and in particular to a forest herbicide comprising terbuthylazine and hexazinone. The present invention provides a forest herbicide comprising terbuthylazine and hexazinone, wherein the raw material composition comprises terbuthylazine powder and hexazinone-gelatin powder, wherein the particle size of the terbuthylazine powder is 0.8-1.2 mm, and the particle size of the hexazinone-gelatin powder is 2.0-2.5 mm, so that: 1. when the forest herbicide is first sprayed on herbs and vine weeds, the gelatin is heated and melted relatively slightly, and the hexazinone is released, thereby ensuring that the herbs and vine weeds obtain the forest herbicide active ingredient with a suitable ratio and a relatively low viscosity, allowing the weed roots to fully absorb the herbicide; 2. when the forest herbicide is later sprayed on non-target trees, the gelatin is heated and melted relatively significantly, and the hexazinone is released, thereby ensuring that the target trees obtain the forest herbicide active ingredient with a relatively high viscosity, allowing the tree stems and leaves to fully absorb the herbicide.

The application belongs to the technical field of herbicides, and provides a preparation method of the herbicide cycloxaprid, which comprises the following steps: 1, mixing and stirring monocyanamide and ethyl chloroformate, cooling to 0-2 DEG C, adding liquid alkali dropwise, controlling pH and temperature, and carrying out incubation reaction to obtain a product GH520-1; 2, adding dimethyl sulfate and benzyl triethylammonium chloride to the product GH520-1, carrying out warming reaction, and after the reaction is completed, standing and layering to obtain a product GH520-2; 3, adding dimethylamine hydrochloride and liquid alkali to the product GH520-2, supplementing toluene, carrying out warming reaction, cooling to room temperature, standing and layering to obtain a product GH520-3; 4, dissolving the product GH520-3 in toluene, adding cyclohexyl isocyanate, and controlling the reaction temperature to obtain a product GH520-4; and 5, adding sodium methoxide and dimethylamine aqueous solution to the product GH520-4, controlling the reaction temperature, and obtaining a product GH520.

The invention relates to the technical field of organic synthesis, and discloses a production method for continuously synthesizing hexazinone. The method comprises the following steps: preparing dimethylamine, a catalyst and toluene into a solution A, and continuously introducing the solution A and a toluene solution of cyanoformamide into a first micro-channel reactor through a peristaltic pump for reaction; premixing the obtained reaction liquid with a toluene solution of cyclohexyl isocyanate by a static mixer, and then pumping the mixture and a methanol solution of sodium methoxide into a second micro-channel reactor together for a cyclization reaction; and washing and separating the reaction effluent, performing reduced pressure concentration on the organic phase through a falling film evaporator to recover the solvent, and performing post-treatment on the concentrate to obtain the high-purity hexazinone. The continuous microchannel reaction technology is adopted, the reaction efficiency is high, side reactions are few, the product purity is high, highly toxic phosgene does not need to be used in the production process, meanwhile, raw materials are low in price, easy to obtain and environmentally friendly, and the method is suitable for industrial production.

The invention relates to the field of herbicides, in particular to a weeding composition containing hexazinone and flumioxazin, which is used for solving the problems of large dosage and poor control effect when the hexazinone and the flumioxazin are independently used in the prior art. The weeding composition prepared by reasonably compounding the hexazinone and the flumioxazin is applied to weeds, the weeding composition is absorbed by the weeds after being applied, and the hexazinone and the flumioxazin can treat the weeds under the single action, so that the prevention and removal effect is achieved, the prevention and removal of the weeds can be promoted under the synergistic effect of the hexazinone and the flumioxazin, and the weeding effect is good. According to the weeding composition, hexazinone and flumioxazin are compounded, the control effect of a single action is poor, the other action can be supplemented, the weed control spectrum is expanded, the generation of drug resistance of weeds is delayed, and hexazinone and flumioxazin are easy to degrade and environment-friendly.