64 results about "Isopropylamine" patented technology

The invention belongs to the technical field of 4-BMA mother liquor recycling, and relates to a method for recycling 4-BMA in mother liquor by adopting a membrane treatment technology, which comprises the following steps: dropwise adding isopropylamine into 4-BMA refining wastewater, adjusting the pH value to 8-9, selecting a proper filter membrane, and filtering by using membrane filtering equipment at a certain temperature to obtain concentrated liquor and permeate liquid; the maximum separation effect is achieved by controlling the volume ratio of the permeate to the concentrated solution, and the 4-BMA isopropylamine salt concentrated solution is obtained; ethyl acetate is added into the 4-BMA isopropylamine salt concentrated solution for extraction, then 13.5 wt% hydrochloric acid is dropwise added for crystallization, and a 4-BMA product is obtained. According to different solubility of 4-BMA, isomer and isopropylamine after salification in water, the isomer salt is dissolved in water to be removed, 4-BMA salt with high purity is obtained, qualified 4-BMA with the purity larger than or equal to 98.00% is obtained through acid adjustment, and the purity of 4-BMA is larger than or equal to 98.00%. The method is low in energy consumption, simple in process, simpler to operate and easier to convert.

The invention discloses alkoxy amine and application of the alkoxy amine in induction of NMP (N-Methyl Pyrrolidone) polymerization of methacrylate monomers and styrene monomers. The alkoxy amine is a novel compound which is synthesized by taking benzaldehyde and isopropylamine as raw materials through three-step reaction of Schiff base reduction, oxidizing agent oxidation and free radical coupling. The obtained alkoxyamine can be used as a monomolecular initiator to effectively regulate and control controllable polymerization of methacrylate and styrene monomers under anaerobic or aerobic conditions, and the peak pattern of a gel chromatography outflow curve is symmetrical and has no obvious tailing phenomenon, so that the alkoxyamine can expand the range of nitroxide free radical polymerization regulation and control monomers, and the preparation method is simple and easy to implement. The method has a good application prospect in the aspect of synthesis of functional polymer materials.

The application discloses a hydroxylamine hydrochloride detection method in azithromycin dry suspension, and relates to the trace detection field. The method uses isoamyl aldehyde as a derivatizing agent, generates isoamyl aldoxime by performing derivatization treatment on a sample to be measured, and then uses N-nitrosodiisopropylamine as an internal standard substance to quantitatively determine the isoamyl aldoxime by using liquid chromatography-tandem mass spectrometry. The detection method adopts an isoamyl aldehyde derivatizing agent-N-nitrosodiisopropylamine internal standard substance system, can correct detection errors caused by factors such as matrix effect, pretreatment loss and derivatization efficiency fluctuation, and improves the accuracy and sensitivity of the trace hydroxylamine hydrochloride detection result, thereby guaranteeing the safety of the medicine.

The invention discloses a glyphosate soluble concentrate and a preparation method, and the glyphosate soluble concentrate comprises the following raw material components in parts by weight: 30-40 parts of glyphosate, 10-15 parts of isopropylamine, 8-12 parts of a composite synergist, 2-3 parts of an anti-freezing agent, 0.05-0.1 part of a pH regulator, 2-3 parts of an additive, 0.1-0.5 part of a defoaming agent, 1-2 parts of a loading agent and 40-50 parts of water. Compared with the prior art, the glyphosate soluble concentrate prepared by the invention has the advantages that the propoxylated quaternary ammonium salt and the ethyoxyl alkyl phosphate are mixed according to a certain mass ratio to form the synergist, so that the pesticide effect of glyphosate is remarkably improved. Meanwhile, the aluminum pillared clay is introduced to load the glyphosate and is cooperatively used with the polydopamine-sodium alginate compound, so that the prepared glyphosate soluble concentrate has relatively high leaf deposition rate and rain wash resistance and also has excellent ultraviolet resistance.

The application belongs to the technical field of coordination complex catalysts, and particularly relates to a chromium-nickel bimetallic center complex catalyst and a preparation method and application thereof. Isopropylamine, a cyclohexyl benzyl chlorophosphine and an acid binding agent are added into a solvent to react, and a PNP ligand is obtained; the PNP ligand, acetylacetone chromium and acetylacetone nickel are respectively dissolved in a solvent to obtain a PNP ligand solution, an acetylacetone chromium solution and an acetylacetone nickel solution, and the PNP ligand solution, the acetylacetone chromium solution and the acetylacetone nickel solution are mixed and stirred to react, and a chromium-nickel bimetallic center complex catalyst is obtained. The chromium-nickel bimetallic center complex catalyst prepared by the application can be used for ethylene oligomerization reaction, can quickly activate ethylene molecules and accurately control the chain growth process, and meets the dual demands of high activity and high selectivity of the catalyst for industrial production.

The invention discloses a method for preparing magnesium borohydride by a solution method, and relates to the technical field of hydrogen storage materials. The method comprises the following steps: dissolving MgCl2 in tetrahydrofuran to form a magnesium source solution, dissolving NaBH4 in isopropylamine to form a boron-hydrogen source solution, mixing the two solutions, and stirring to react; carrying out centrifugation and microfiltration membrane suction filtration separation on the reacted mixture to remove solid impurities so as to obtain a clarified filtrate; and carrying out vacuum desolventizing treatment on the filtrate to finally obtain solid magnesium borohydride. The method is simple in process flow, can be completed under mild conditions, and has the advantages of low raw material cost and high operation safety; the prepared magnesium borohydride product has excellent performance of lower initial hydrogen desorption temperature, and the temperature is only 115.8 DEG C. The method is especially suitable for large-scale industrial production.

The invention belongs to the technical field of pharmacy, and relates to a method for recovering effective components from ampicillin sodium crystallization mother liquor, which comprises the steps of diisopropylamine recovery, ampicillin trihydrate acid recovery and sodium isooctanoate recovery. According to the method, the diisopropylamine, the ampicillin trihydrate and the sodium isooctanoate are effectively recovered from the solvent-method ampicillin sodium crystallization mother liquor, the recovery rates of the diisopropylamine, the ampicillin trihydrate and the sodium isooctanoate recovered by the method are all higher than 80%, and the quality of the recovered product is good. According to the method, various effective components of the ampicillin sodium crystallization mother liquor are effectively recovered, the production cost can be greatly reduced, meanwhile, the discharge amount of sewage is reduced, and the economic benefits and social benefits of enterprises are improved.

The invention discloses a bentazone intermediate sulfonation-chlorination two-step continuous preparation process which comprises the following steps: continuously metering and adding a solvent, chlorosulfonic acid, triethylamine, isopropylamine and a catalyst into a first-section tubular reactor, and carrying out sulfonation reaction to obtain a reaction material isopropylaminosulfonic acid; continuously introducing the reaction material isopropylamine sulfonic acid into a second section of tubular reactor, and simultaneously continuously metering and adding methyl anthranilate and phosphorus oxychloride for chlorination reaction; after the reaction is finished, quenching the reaction liquid with water, and carrying out layering and distillation treatment to obtain an intermediate o-isopropylamine sulfonamide methyl benzoate solid; and carrying out ring-closure reaction on the intermediate o-isopropylamino sulfonamido methyl benzoate solid and sodium methoxide in a methanol solution to prepare the bentazone active compound. According to the method, the defects of low bentazone product content and poor yield caused by high temperature of intermittent sulfonation and chlorination are effectively overcome, the operation time is shortened, and the productivity is improved.

The present invention discloses a method for efficiently catalyzing the preparation of isopropylamine from isopropyl alcohol. The catalyst used in this method is prepared by a preparation method including the following steps: 1) subjecting a support to acid treatment and / or alkali treatment to obtain a treated support, the support containing silicon and / or aluminum elements; 2) loading an oxide of an active metal component on the treated support to obtain a catalyst precursor; 3) performing hydrophobic modification on the catalyst precursor with a silane coupling agent, and obtaining the catalyst after reduction. By subjecting the support to acid treatment and / or alkali treatment, and performing hydrophobic modification treatment with a silane coupling agent after loading the active component, the present invention can form an anhydrous environment similar around the active component of the catalyst, which can significantly improve the conversion rate of isopropyl alcohol.

The invention relates to the technical field of silicon wafer polishing, in particular to a high-speed and low-defect silicon medium polishing liquid which comprises grinding particles, an alkaline compound, a surface protective agent and water. The content of the grinding particles is 4-10 wt%, the content of the alkaline compound is 0.05-1.5 wt%, the content of the surface protective agent is 0.1-3 wt%, and the balance is water; the alkali compound is at least one of tetramethylammonium hydroxide, piperazine, 1-(2-aminoethyl) piperazine, 1, 4-bis (3-aminopropyl) piperazine, 1, 4-bis (2-hydroxyethyl) piperazine, 1, 8-diazabicyclo (5, 4, 0) undec-7-ene, 4-aminopiperidine, monoethanolamine, 3-amino-1-propanol, n-propylamine, isopropylamine, diglycolamine, isopropanolamine, ethylenediamine, choline hydroxide and ammonia water. By adding the organic base with a special molecular structure and adjusting the concentration ratio of the organic base to the surface protecting agent, the high removal rate can be effectively achieved under the high dilution ratio, and the good surface quality without polishing marks / fog, with few particle defects and low roughness is obtained.

The invention belongs to the technical field of chemical synthesis, and discloses a method for synthesizing 3-hydroxy-3-alkyl propionate based on a continuous flow reaction technology. According to the method, a continuous flow reaction device is adopted for synthesis, acetate, lithium diisopropylamide and an aldehyde compound are taken as raw materials, and 3-hydroxy-3-alkyl propionate is synthesized through lithium-hydrogen exchange and alkyl aldehyde addition reaction. According to the method provided by the invention, the reaction process is easy to control, the danger coefficient of the reaction operation and process is greatly reduced, and the safety and reliability of the reaction are improved. Meanwhile, by the method, the reaction efficiency is remarkably improved, and the synthesis time is shortened from dozens of hours to dozens of minutes, even dozens of minutes; in addition, different 3-hydroxy-3-alkyl propionate products can be prepared by introducing different substrates and switching, the applicability is high, and the industrial application value is high.

The invention relates to a preparation method of diisopropylamine silane, which comprises the following steps: (1) reacting dichlorosilane with diisopropylamine to obtain diisopropylamine chlorosilane; and (2) carrying out a reaction on the diisopropylamine chlorosilane obtained in the step (1) and lithium hydride to obtain the diisopropylamine silane. The preparation method of diisopropylamine silane in the prior art is optimized, a complex catalyst does not need to be prepared in advance, raw materials are simple and easy to obtain, reaction steps are simple, high-temperature and high-pressure reaction conditions are avoided, the reaction conditions are mild, the obtained target product has high yield and purity, and industrial large-scale production is facilitated.

Present invention relates to a method for producing green fluorescent paint for use as a lighting for energy-efficient highway lane and park markings, characterized as comprising following production steps; adding 9,10-dibromoanthracene, CuI, Pd catalyst, diisopropylamine and toluene in a reaction flask under nitrogen atmosphere and stirring them on a magnetic stirrer, adding tetraphenylsilanacetylenyl to the mixture and performing reflux distillation by increasing the reaction temperature, after 24 hours bringing the temperature to room temperature, obtaining pure product from the mixture brought to room temperature using column chromatography, taking 0-1% by mass of the product and mixing it in resin and an aromatic solvent for 6-24 hours.

The invention discloses a closed type polyisocyanate composition with stable storage and a preparation method and application thereof, the closed type polyisocyanate composition comprises a structure I, a structure II, a structure III and a structure IV, A represents a gel chromatography (GPC) integral area percentage of the structure I; b represents the gel chromatography test GPC integral area percentage of the structure II, C represents the gel chromatography test GPC integral area percentage of the structure III, and D represents the gel chromatography test GPC integral area percentage of the structure IV; wherein A / (A + B + C + D) = 0.15-0.25, and B / (A + B + C + D) = 0.30-0.45. The water-based polyurethane adhesive contains terminated polyisocyanate which is obtained by carrying out a reaction on a hexamethylene diisocyanate polymer, diethyl malonate and diisopropylamine. The composition is clear and transparent after being stored for 12 months at normal temperature.

The invention discloses a membrane permeation-pressurized rectification coupling process of a diisopropylamine-isopropanol ternary water-containing system, which comprises the following steps: primarily separating by an azeotropic rectification tower to obtain a diisopropylamine-isopropanol-water homogeneous ternary mixture at the tower top, and cooling by a cooler to obtain a ternary mixture; conveying to a membrane dehydration assembly to selectively remove moisture; and the dehydrated diisopropylamine-isopropanol mixture enters a pressurized rectifying tower, so that high-purity recovery of diisopropylamine and isopropanol is realized. The process does not need to introduce a third component, equipment is simple, the recovery purity is high, meanwhile, chemical pollution is avoided, and the environmental protection requirement is met.

The invention belongs to the technical field of coordination complex catalysts, and particularly relates to a chromium-nickel bimetallic center complex catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: adding isopropylamine, cyclohexylphenylphosphonium chloride and an acid-binding agent into a solvent for reaction to obtain a PNP ligand; the preparation method comprises the following steps: respectively dissolving a PNP ligand, chromium acetylacetonate and nickel acetylacetonate in a solvent to obtain a PNP ligand solution, a chromium acetylacetonate solution and a nickel acetylacetonate solution, and mixing and stirring the PNP ligand solution, the chromium acetylacetonate solution and the nickel acetylacetonate solution for reaction to obtain the chromium-nickel bimetallic center complex catalyst. The prepared chromium-nickel bimetallic center complex catalyst can be used for ethylene oligomerization reaction, ethylene molecules can be rapidly activated, the chain growth process can be accurately controlled, and the dual requirements of industrial production for high activity and high selectivity of the catalyst are met.

The invention belongs to the field of oilfield chemical treatment agents, and particularly relates to a preparation method of a thickening agent for oil extraction fracturing, which comprises the following steps: 1, uniformly mixing 25 parts of acrylamide, 15 parts of acrylic acid, 4 parts of Tween-80, 1.5 parts of dodecyl benzene sulfonic acid isopropylamine salt, 90 parts of deionized water and 2.5 parts of azodiisobutylimidazoline hydrochloride to obtain a water phase; 2, uniformly mixing 45 parts of 0 # diesel oil, 14 parts of methyl methacrylate, 7 parts of butadiene, 7 parts of diacetone acrylamide and 6 parts of butanol polyoxypropylene ether to obtain an oil phase; and 3, putting the oil phase into a reaction kettle, adding the water phase into the oil phase, uniformly stirring at the rotating speed of a motor of 9000rpm for 30 minutes, adjusting the rotating speed to 700rpm, introducing nitrogen for 30 minutes, heating to 535 DEG C, stirring for reacting for 10 hours, and cooling to obtain the fracturing fluid thickening agent for oil extraction. The shearing resistance, the temperature resistance, the salt resistance and the sand suspending property of the thickening agent are superior to those of the existing thickening agent.

The present invention relates to the technical field of camptothecin derivative preparation, particularly to a camptothecin derivative synthesis method, which uses 2-nitroacetophenone and isopropylamine as raw materials, and the camptothecin derivative is obtained through a Mannich reaction, a methylsulfonylation reaction, a nitro reduction reaction and a ring closing reaction. According to the synthetic method of the camptothecin derivative, the complex camptothecin derivative is split into two segments 1-(2-aminophenyl)-3-(N-isopropyl-N-methylsulfonylamino) propan-1-one and a compound V which are easy to prepare, and finally, a plurality of rings and chemical bonds are constructed simultaneously through one-step efficient ring closing reaction. The yield attenuation caused by progressive multiplication of the yield in the traditional linear synthesis is avoided, and the total yield is improved.

The application discloses SAPO-18-MeR molecular sieve and a preparation method and application thereof. The anhydrous chemical composition of the molecular sieve is mMe*nR(Si x Al y P z )O2; Me is at least one selected from Li + , Na + , K + and NH4 + ; R is at least one selected from N, N-diisopropyl ethylamine, tetraethyl ammonium hydroxide, triethylamine, diisopropylamine, diethylamine and ethylenediamine; m is the mole number of Me, m=0.05-0.2; n is the mole number of R, n=0.05-0.2; x is the mole fraction of Si, x=0.05-0.35; y is the mole fraction of Al, y=0.35-0.55; z is the mole fraction of P, z=0.25-0.45, and x+y+z=1. The molecular sieve has excellent silicon distribution and strong acid property, and has excellent catalytic performance as a denitration catalyst after loading Cu ions.

The invention discloses a glyphosate-based composite herbicide capable of being rapidly degraded and a preparation method of the glyphosate-based composite herbicide. Comprising 30-40 parts of glyphosate isopropylamine salt, 12-18 parts of a humic acid nano titanium oxide composite carrier, 8-10 parts of sodium humate, 3-5 parts of a surfactant, 4-8 parts of a suspension stabilizer, 1-3 parts of a visible light response photosensitizer, 0.2-0.4 part of a degradation functional strain, 60-90 parts of a hydrogen peroxide solution with the mass fraction of 4-6% and 120-160 parts of deionized water. The invention also discloses a preparation method of the rapidly degraded glyphosate-based composite herbicide. The preparation method comprises the following steps: (1) pretreating the humic acid nano titanium oxide composite carrier with hydrogen peroxide; (2) adding glyphosate isopropylamine salt into deionized water for dissolving, then adding humic acid, and adjusting the pH value to obtain a mixed solution; (3) adding the pretreated composite carrier into the mixed solution, and carrying out high-speed shearing emulsification to obtain a suspension; and (4) adding a visible light response photosensitizer and a surfactant into the suspension, and then mixing with a degradation functional strain to obtain the rapidly degraded glyphosate-based composite herbicide.

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 relates to the technical field of fine chemical engineering, in particular to a continuous preparation process of N-methylisopropylamine, which comprises the following steps: dropwise adding a monomethylamine solution into acetone to obtain an imine solution, preserving heat, adding a platinum-carbon catalyst, and pulping to obtain a mixed solution; controlling the flow rate, and sequentially carrying out hydrogenation reaction on the mixed solution and hydrogen through a dynamic microreactor to obtain a mixture; the mixture is distilled, filtered and rectified to obtain the N-methylisopropylamine, monomethylamine and acetone are used as raw materials, continuous hydrogenation reaction is performed to prepare the N-methylisopropylamine, conditions are mild, operation is easy and convenient, safety is high, production efficiency is high, and the method is suitable for industrialization.

The present application relates to the technical field of enzyme engineering, and discloses an amino transferase mutant and application thereof.The present application provides a wild-type amino transferase mutant derived from Aspergillus avenaceus.The amino transferase mutant is obtained by carrying out single-point or multi-point combined mutation on the 20th, 60th, 92nd and 186th positions of the amino acid sequence shown in SEQ ID NO.2, and can directly take the sitagliptin intermediate precursor ketone as a substrate, take isopropylamine as an amino donor, take phosphopyridoxyl as a coenzyme, take dimethyl sulfoxide as a substrate solvent, catalyze the preparation of a sitagliptin intermediate with high optical purity, and the specific enzyme activity reaches 139.3 U / g in a reaction system with a final concentration of 50% DMSO, greatly improves the catalytic efficiency, and the product has high stereoselectivity (the e.e. value of the product reaches 99%), and has a wide industrial application prospect.

The invention discloses a preparation method and application of a low-silicon SAPO-34 molecular sieve. Comprising the following steps: mixing an aluminum source, a phosphorus source, a silicon source, a template agent R1, a template agent R2 and water to obtain initial gel, wherein the molar ratio of Al2O3 to P2O5 to SiO2 to R1 to R2 to H2O in the initial gel is 1.0: (0.5-3.0): (0.01-0.3): (0.5-8.0): (0.01-2.0): (20-200); r1 is at least one of diethylamine, triethylamine, di-n-propylamine, diisopropylamine, n-butylamine, morpholine, cyclohexylamine, piperazine and tetraethylammonium hydroxide; r2 is at least one of diethylenetriamine, triethylene tetramine, tetraethylenepentamine, pentaethylenehexamine and polyethylene polyamine; heating and crystallizing the initial gel under a closed condition to obtain a crystallized product; and separating and drying the crystallized product to obtain the molecular sieve. The method is simple in process, good in repeatability and beneficial to large-scale industrial production.

The invention provides a method for preparing N-methylisopropylamine through continuous hydrogenation. Loading the catalyst precursor into a fixed bed reactor, introducing nitrogen, introducing hydrogen, and heating for in-situ reduction to obtain a catalytic hydrogenation solid catalyst; the method comprises the following steps: uniformly stirring and mixing a methylamine aqueous solution with the concentration of 40%, acetone and a solvent, introducing the mixture into a fixed bed reactor at a certain flow rate, and introducing hydrogen; and cooling, rectifying and purifying the reaction liquid flowing out of the tail end of the fixed bed reactor to obtain the target product N-methyl isopropylamine. The method has the advantages of high product yield and stable quality; the method has the characteristics of simple operation process and small environmental pollution, and meets the requirements of industrial clean production.

The invention belongs to the technical field of petrochemical catalysis, and relates to a method for propylene liquid phase epoxidation on a zinc modified TS-1 zeolite catalyst. The zinc modified TS-1 zeolite catalyst is prepared by a combined modification method, and the method comprises the following steps: 1, carrying out hydrothermal modification treatment on a TS-1 zeolite matrix by using a tetrapropylammonium hydroxide aqueous solution containing isopropanolamine, adjusting the coordination state of TS-1 zeolite skeleton titanium, generating an open mononuclear hexa-coordination titanium catalytic active center, and improving the activity of the catalyst; in the second step, the microenvironment of the open type mononuclear hexa-coordinated titanium species is adjusted by using the fusible zinc salt, so that acidic silicon hydroxyl around the microenvironment is eliminated, and the selectivity of the catalyst is improved; the propylene liquid phase epoxidation method is technically characterized in that hydrogen peroxide with the concentration lower than 50 wt.% is used as an oxidizing agent on the catalyst to produce epoxypropane, and a gas-solid phase oxidation method is used for regenerating the deactivated catalyst.

The present application relates to oil and gas hydrogen sulfide absorption technical field, especially to a kind of for oil and gas exploitation, oil and gas environmental protection gathering and transportation hydrogen sulfide absorbent and preparation method thereof.Add 3-amino pentane and isopropylamine, 3-amino pentane and isopropylamine mixture and hydrogen sulfide reaction to form 3-sulfanyl pentane and 1-sulfanyl isopropylamine, reduce the content of hydrogen sulfide in oil and gas;In the reaction, appropriate solid catalyst is added, the reaction speed is improved, and the generation time is saved;And in the oil and gas of reaction kettle, bactericide propyl trimethyl ammonium chloride 2% to 4% and SAA are added, to avoid bacteria in oil and gas storage, sulfate and sulfur-containing organic compounds in sulfur are reduced to hydrogen sulfide;The use of precipitant adsorbs solid impurities in oil and gas and impurities generated after reaction, and the removal of impurities is facilitated;This scheme not only removes hydrogen sulfide in oil and gas, but also ensures that hydrogen sulfide is not generated again during oil and gas storage.

The present invention relates to a kind of herbicidal composition, herbicide and application thereof.The herbicidal composition includes component A, component B and component C, wherein component A is cashew nut shell liquid and / or tea tree essential oil, component B is tembotrione, component C is selected from at least one of S-isopropylamine, 2-methyl-4-chloro and its derivatives, clofopyralid and its derivatives, atrazine, nicosulfuron, and the mass ratio of component A, component B and component C is 1:(1 2.5):(1 10).The herbicidal composition of the present invention shows good synergistic effect, and in terms of preventing and treating grass weeds, broadleaf weeds and sedge, the herbicidal effect of the herbicidal composition is better than the herbicidal effect of a single component.

The invention belongs to the technical field of organic synthesis, and relates to a continuous synthesis method of 3-N-(1-ethoxyethyl)-5-methyl oxazolidine-2-ketone. Comprising the following steps: firstly, introducing isopropanolamine and dimethyl carbonate into a microchannel mixer for mixing, pumping the mixture and an ionic liquid catalyst into a primary tubular reactor for cyclization reaction, and separating to obtain 5-methyloxazolidine-2-ketone; and pumping an acetonitrile solution of 5-methyl oxazolidine-2-ketone, an acetonitrile solution of 1-bromoethyl ether and an acetonitrile solution of the composite ionic liquid catalyst into a diode reactor by using a feeding pump to carry out nucleophilic substitution reaction, and separating to obtain a high-purity product. The composite ionic liquid catalyst obtained by adopting an in-situ composite method shows a unique double-ion synergistic activation mechanism, the reaction rate can be remarkably increased, side reactions are reduced, safe and efficient continuous reactions are realized by adopting a tubular reactor, and the purity and yield of products are improved.