36 results about "Salicylhydroxamic acid" patented technology

Biocompatible matrices or implants on which one or more specific cell-interactive molecules (“biomolecules”) can be immobilized have been developed. The matrices allow for the independent control of ligand concentration and matrix strength. In one embodiment, the matrix or implant is modified with one or more moieties capable of complexing bioconjugates prepared from one or more biomolecules. Suitable moieties include phenyl boronic acid complexing agents, such as salicylhydroxamic acid, which can complex to one or more biomolecules containing one or more phenyl boronic acid moieties. The biomolecules may be anchored to the matrix via a spacer molecule, which may allow for greater mobility of the biomolecules in aqueous solution. In one embodiment, the matrix is a hydrogel material which has been doubly-derivatized, wherein ligand concentration and matrix strength can be independently controlled. The matrices and implants can be used in vivo and in vitro applications including diagnostics, biosensors, bioprocess engineering, tissue engineering, regeneration and repair, and drug delivery.

The invention relates to an improved production method for salicylhydroxamic acid. The method is characterized in that a metered hydroxylamine solution is added into a reaction vessel; the PH value of a reaction system is adjusted around 12.0 by a strong alkali solution; the reaction system is heated to a temperature of between 33 and 38 DEG C, added with an emulsifier and dripped with a stock solution of menthyl salicylate and a strong alkali solution; the PH of the reaction system is always stabilized around 12.0; after solid in the solution is dissolved, the solution is kept at the temperature and performs arrest reaction; subsequently, the PH is adjusted to be between 4.0 and 5.0 by using acid; and the solution is aged at the temperature of between 20 and 30 DEG C and filtered to obtain salicylhydroxamic acid solid. As the method reduces the using level of hydroxylamine, alkali and the acid in the process of acidification simultaneously, the method improves the yield of the salicylhydroxamic acid and effectively reduces the discharge amount of methanol, thereby reducing environmental pollution.

The invention discloses a composition containing bactericidal active substances of SYP-1620 and tricyclazole, and a composition containing bactericidal active substances of SYP-1620 and tricyclazole and potentiator salicylic acid or salicylhydroxamic acid. SYP-1620 and tricyclazole and in a ratio of 1:50-50:1 by weight on the basis of the active components, and the proportion of potentiator salicylic acid or salicylhydroxamic acid to bactericidal active components is 0.1-20% by weight. The composition can be prepared to preparations, such as oil suspension agent, emulsifiable solution, suspending agent, wettable powder and water dispersible granules, and applied in farmlands, orchards or warehouses for controlling plant diseases of cereals, vegetables, fruit trees, Chinese medicinal plants, lawns and tropical crops, such as rice blast, colletotrichum lagenarium, cotton fusarium wilt and the like.

The invention discloses a collecting agent as well as a preparation method and application thereof. The collecting agent is composed of decyl salicylhydroxamic acid, methyl decyl salicylate and decylsalicylic acid, is in a brown yellow viscous state at the normal temperature, can be dispersed in an alkali solution, and has relatively strong collecting capacity on non-ferrous metal oxide ores. Thecollecting agent can be prepared by a one-pot method and is simple in process. The preparation method of the collecting agent comprises the following steps that the decyl salicylic acid and methanolare mixed, a catalyst is added, and the methyl decyl salicylate is generated under stirring through the reaction; the methyl decyl salicylate and the hydroxylamine hydrochloride are mixed with alkali,water, the methanol or ethanol is taken as a solvent, and the collecting agent being the mixture of the decyl salicylhydroxamic acid, the methyl decyl salicylate and the decyl salicylic acid is obtained through the reaction and acidifying. The collecting agent is applied to beneficiation of tungsten ores, rare earth ores and tin ores.

The invention discloses a method for flotation separation of iron oxide ore in cassiterite sulphide slime ore by using a combined inhibitor. The combined inhibitor is composed of sodium carbonate andsodium tripolyphosphate. The operation of flotation separation of the iron oxide ore in the cassiterite sulphide ore slime ore comprises the following steps: roughing, scavenging and concentrating thecassiterite sulphide ore in sequence; in the roughing process, a sodium carbonate solution is firstly used for adjusting the pH of ore pulp to be 6-8, then a sodium tripolyphosphate solution, a collecting agent salicylhydroxamic acid and an auxiliary collecting agent P86 are added, and cassiterite and iron oxide minerals are separated through roughing, scavenging and concentration. The combined inhibitor has the advantages of being high in selectivity, soluble at normal temperature, non-toxic, harmless, low in dosage, easy in concentrate treatment and the like and can realize effective separation of cassiterite and iron oxide minerals and further improves the quality of tin concentrate.

The invention specifically relates to a water-based environmentally-friendly antirust agent used before electrical steel decarburization and a preparation method thereof. The technical scheme of the preparation method is as follows: mixing 0-10wt % of salicylhydroxamic acid, 0-10wt % of ethanol, 0-20wt % of urea, 0-20wt % of ammonia water, 0-10wt % of methenamine, 0-10wt % of ammonium carbonate and 20-80wt % of deionized water, uniformly dispersing in a stirrer, and packaging. The components of the water-based environmentally-friendly antirust agent do not contain chromate, nitrite and toxic and harmful ingredients so that the water-based environmentally-friendly antirust agent is environmentally-friendly; the prepared antirust agent is coated on the surface of the electrical steel and forms a protective layer on the metallic surface after dried by cold air or aired, thus inhibiting the corrosion of metal; when decarburization is carried out at above 750 DEG C, the surface layer gradually sublimes or breaks up into volatile gas; and the decarburization of the electrical steel is not affected under the condition that surface treatment is omitted before decarburization.

The invention discloses a color-protecting and fresh-keeping method capable of restraining potatoes from sprouting and reducing solanine, and belongs to the field of fresh keeping of foods. According to the method disclosed by the invention, chlorine dioxide is used for cleaning, and salicylhydroxamic acid is used for soaking, so that the effect of sprouting inhibition is achieved. A crisp-keeping agent and a color fixative are used for treatment, a mixed solution of rice vinegar and sodium metabisulfite is used for suffocating, the acidity of the vinegar is used for decomposing the solanine, Na2S2O5 is used for reducing the activity of polyphenol oxidase (PPO) and peroxidase (POD), and finally, aluminum foil bags are used for vacuum packing, so that the purposes of color protection and fresh keeping are achieved. According to the method, potatoes can have long shelf life and good storage adaptability.

The invention discloses a mixed collector of cassiterite and a preparation method and application thereof. The mixed collector of the cassiterite is formed by mixing salicylhydroxamic acid, benzohydroxamic acid and styrene phosphonic acid. By means of the mixed collector, the agent cost is reduced, the viscosity of bubbles in the floatation process is reduced, the floatation indexes of tin are increased, low-grade tin tailings are classified in advance, coarse fraction products are fully disaggregated, recovery of the tin is facilitated, the classified products are deslimed, the influences offine silt on following tin floatation are reduced, the consumption of the fine silt on agents is reduced, and the tin grade and the tin recovery rate are increased while the production cost is reduced.

The invention discloses a heat-insulation heat-preservation noise-reduction coating and a preparation method thereof. The noise-reduction coating is prepared from epoxy modified acrylic emulsion, hydrogenated rosin resin, salicylhydroxamic acid, sulfonated bitumen, tire powder, glass flake, organic modified rectorite, hollow glass beads, sodium fluosilicate, carbitol hexyl acrylate, dioctyl sebacate, maleic anhydride, sodium dodecyl sulfate, simethicone, potassium tripolyphosphate, nonylphenol polyethylene ethoxy ether, dioctyl phthalate, diethyl suberate, 4,4'-dithiomorpholine, zinc methacrylate, polyvinyl alcohol, zinc stannate, toluenesulfonic acid and water. The heat-insulation heat-preservation noise-reduction coating is good in heat insulation and heat preservation, high in bonding strength, high in hardness, strong in adhesive force, good in ultraviolet aging resistance, excellent in comprehensive performance and good in market prospect, and well meets the application requirements for energy conservation and consumption reduction.

The invention relates to a unimolecular magnetic body and a preparation method thereof, in particular to a six-nuclear dysprosium cluster cyclic complex unimolecular magnetic body and a preparation method thereof, and aims to solve the problem that a rare earth complex unimolecular magnetic body prepared by using an existing method is complicated in synthesis method, low in controllability and poor in repeatability. The chemical formula of the six-nuclear dysprosium cluster cyclic complex unimolecular magnetic body is [Dy6(H2shi)6(2-pyca)6(2-pyca-)6], and the molecular formula is C114H90Dy6N18O42. The method comprises the steps that salicylhydroxamic acid, picolinic acid and Dy(NO3)3 6H2O are dissolved into a solvent, and a mixed solution is obtained through ultrasonic treatment; the mixedsolution is subjected to heating reflux, pyridine is added, and a preform is obtained; the preform is subjected to solvent evaporation, and the six-nuclear dysprosium cluster cyclic complex unimolecular magnetic body is obtained. By means of the preparation method, the six-nuclear dysprosium cluster cyclic complex unimolecular magnetic body can be obtained.

The invention relates to an improved production method for salicylhydroxamic acid. The method is characterized in that a metered hydroxylamine solution is added into a reaction vessel; the PH value ofThe invention relates to an improved production method for salicylhydroxamic acid. The method is characterized in that a metered hydroxylamine solution is added into a reaction vessel; the PH value of a reaction system is adjusted around 12.0 by a strong alkali solution; the reaction system is heated to a temperature of between 33 and 38 DEG C, added with an emulsifier and dripped with a stock sola reaction system is adjusted around 12.0 by a strong alkali solution; the reaction system is heated to a temperature of between 33 and 38 DEG C, added with an emulsifier and dripped with a stock solution of menthyl salicylate and a strong alkali solution; the PH of the reaction system is always stabilized around 12.0; after solid in the solution is dissolved, the solution is kept at the temperatution of menthyl salicylate and a strong alkali solution; the PH of the reaction system is always stabilized around 12.0; after solid in the solution is dissolved, the solution is kept at the temperature and performs arrest reaction; subsequently, the PH is adjusted to be between 4.0 and 5.0 by using acid; and the solution is aged at the temperature of between 20 and 30 DEG C and filtered to obtaiure and performs arrest reaction; subsequently, the PH is adjusted to be between 4.0 and 5.0 by using acid; and the solution is aged at the temperature of between 20 and 30 DEG C and filtered to obtain salicylhydroxamic acid solid. As the method reduces the using level of hydroxylamine, alkali and the acid in the process of acidification simultaneously, the method improves the yield of the salicyln salicylhydroxamic acid solid. As the method reduces the using level of hydroxylamine, alkali and the acid in the process of acidification simultaneously, the method improves the yield of the salicylhydroxamic acid and effectively reduces the discharge amount of methanol, thereby reducing environmental pollution.hydroxamic acid and effectively reduces the discharge amount of methanol, thereby reducing environmental pollution.

The invention relates to shear thickening liquid. The shear thickening liquid contains the following components in parts by weight: 50-70 parts of poly(N-2-hydroxypropyl)methacrylamide dispersion liquid and 10-20 parts of a cross-linking component solution, wherein the cross-linking component solution contains the following raw materials in parts by weight: 10-15 parts of phenylboronic acid, 3-5 parts of salicylhydroxamic acid and 20-30 parts of a solvent. A preparation method of the shear thickening liquid comprises the steps of uniformly mixing poly(N-2-hydroxypropyl)methacrylamide dispersion liquid with the cross-linking component solution, regulating the pH value of the system to 4.5-5.5, and removing bubbles in the system. The design, namely the shear thickening liquid has a remarkable shear thickening effect and is short in shear thickening time.

The invention provides application of salicylhydroxamic acid to detection of hypochlorite and specifically discloses a fluorescence detection method for hypochlorite. The detection method uses salicylhydroxamic acid for quantitative detection of the content of hypochloric acid in a HEPES solution with a pH value of 7.4. The detection method shows high sensitivity and selectivity to hypochlorite; a detection reagent is cheap; detection process is easy, sensitive and rapid; and detection results are accurate.

The invention discloses a tin concentrate separating system and a tin concentrate separating process. The tin concentrate separating system comprises a first floating tank, a second floating tank, a first rotary kiln, a second rotary kiln and an electric furnace; the electric furnace is provided with a material mixture inlet; the material mixture inlet is connected with a material mixing tank; a tin concentrate pulp inlet, and a styryl phosphonic acid, phenylprohydroxoxime acid and foaming agent No.2 oil inlet are formed in the first floating tank; a first floated concentrate outlet and a first floated tailing outlet are also formed in the first floating tank, and are respectively connected to the first rotary kiln and the material mixing tank; a first floated tailing pulp inlet and a salicylhydroxamic acid and foaming agent No.2 oil inlet are formed in the second floating tank; a second floated concentrated outlet and a second floated tailing outlet are also formed in the second floating tank, and are respectively connected to the second rotary kiln and the material mixing tank. The separating system disclosed by the invention is simple in structure; by utilizing the separating system, arsenic and sulphur can be effectively reduced; moreover, the tin loss in a separating process is reduced; the economic benefit is high.

The invention discloses a collecting agent for sorting zinc oxide ore. The collecting agent is mainly prepared by the following raw materials in parts by weight: 50 to 100 parts of isobutanol, 50 to 120 parts of sodium hydroxide, 60 to 120 parts of carbon disulfide, 10 to 200 parts of 1-amino-n-heptane, 50 to 100 parts of glycerol, 50 to 120 parts of salicylhydroxamic acid, 10 to 30 parts of sodium carbonate, 20 to 100 parts of sodium sulfide, 50 to 150 parts of water glass solution and 10 to 40 parts of kerosene. In addition, the invention also discloses a preparation method of the collecting agent. The collecting agent has collecting performance for both zinc sulfide and zinc oxide, the zinc sulfide and the zinc oxide can be simultaneously sorted, the process of sorting the zinc oxide after the zinc sulfide is sorted is not needed, the collecting agent is high in selectivity, the ore sorting process is simple in flow, the cost is low, the grade of the zinc concentrate obtained in a floatation manner is greater than 35%, and the grade and the recovery rate are obviously higher than those of conventional chemicals.

The invention provides a treatment agent and a treatment method of reducing a nicotine content of an upper tobacco leaf of a cured tobacco and belongs to the field of plant growth regulation. The treatment agent and the treatment method solves the problem of influence on the quality of the tobacco leaf due to quick increase of the nicotine content of the upper tobacco leaf after topping. The treatment agent is a mixture of salicylhydroxamic acid and glucose. The invention further provides the treatment method of reducing the nicotine content of the upper tobacco leaf after the topping. The method comprises the steps of dissolving salicylhydroxamic acid and glucose in agar gel to prepare an agar gel block, fixedly placing the agar gel block at a cutting surface of a topping stem of a tobacco plant, or spraying a mixed solution of salicylhydroxamic acid and glucose onto the upper tobacco leaf after the topping of the tobacco plant and harvesting of a lower tobacco leaf. The treatment agent of reducing the nicotine content of the upper tobacco leaf of the cured tobacco is simple in formula, significant in effect, and flexible in use method, can significantly reduce the nicotine content of the upper tobacco leaf after the topping and improves the quality of the tobacco leaf.

The invention relates to a preparation method of high-content liquid sodium salicylhydroxamic acid and belongs to the field of preparation of mineral smelting materials. The preparation method involved in the invention comprises the following steps: carrying out a hydroxyl oximation reaction on salicylate and hydroxylamine sulfate in a solution containing a macromolecular emulsifier and alkali, and then carrying out solid-liquid separation to obtain the liquid sodium salicylhydroxamic acid, wherein the macromolecular emulsifier is at least one of pesticide emulsifier 400#, pesticide emulsifier700#, APEP-108 and pesticide emulsifier 1602#. The invention further provides the liquid sodium salicylhydroxamic acid prepared by adopting the preparation method; based on salicylhydroxamic acid, the content of the salicylhydroxamic acid is 22.9 to 23.8 percent. The preparation method involved in the invention has the characteristics of no need of repeatedly adding acid and alkali, no wastewaterand high product utilization rate and content.

The invention discloses a collector for rutile flotation. A compound of salicylhydroxamic acid, linolenic acid and sodium dodecylsulphate is adopted as the collector. The collector comprises, by mass10-80% of the salicylhydroxamic acid, 10-80% of the linolenic acid and 10-40% of the sodium dodecylsulphate. According to a combined drug, the collecting capability and selectivity on rutile are improved through the synergistic action among drugs; compared with a single rutile collector, the rutile collector has the advantages of being less in drug consumption, less in price, soluble under room temperature, free of toxin, efficient and environmental friendly, and the rutile collector has significant meaning in improving the recycling of titanium resources.

The invention discloses a method for comprehensively recovering iron, sulfur and titanium from complex polymetallic ore. The method comprises the following steps that firstly the complex polymetallic ore is ground; then strong magnetic separation, weak magnetic separation and scavenging are carried out to obtain iron ore concentrate and final strong magnetic scavenging tailings; the final strong magnetic scavenging tailings are mixed with oxalic acid, butyl xanthate and terpenic oil to perform sulfur flotation, and final sulfur concentrate and final sulfur flotation tailings are obtained; the final sulfur flotation tailings are reground, obtained reground fine materials are mixed with sodium fluosilicate, sodium silicate, citric acid, sodium hexametaphosphate, lead nitrate, benzohydroxamic acid and salicylhydroxamic acid for titanium flotation, one-time roughing and more than one-time concentration are adopted, and titanium concentrate and concentration flotation tailings of corresponding sections are obtained; and the obtained flotation titanium concentrate is mixed with hydrochloric acid and hydrofluoric acid for at least one time of acid leaching to obtain a titanium product. In this way, high-quality titanium concentrate can be obtained, and meanwhile, valuable components of iron and sulfur are effectively recycled, so that resource utilization of titanium-containing polymetallic ore is achieved.

A method for improving ilmenite flotation through titanium dioxide waste liquid comprises the following steps that (1) after ilmenite is finely ground, desulfurization flotation is conducted, and sulfur concentrate and roughed ilmenite pulp are obtained; and (2) titanium white waste liquid and a collecting agent are added into the roughed ilmenite ore pulp for flotation, and titanium concentrate is obtained. The waste acid component in the titanium dioxide waste liquid is used for replacing sulfuric acid, bulk consumption of the titanium dioxide waste liquid is achieved, meanwhile, metal ions in the titanium dioxide waste liquid play a role in activating the ilmenite, the salicylhydroxamic acid iron / titanium complex collecting agent prepared through the titanium dioxide waste liquid can effectively improve the flotation index of the ilmenite, and the flotation efficiency of the ilmenite is improved. The titanium dioxide waste liquid is turned into wealth from waste; and the problems that the titanium dioxide waste liquid is difficult to treat and utilize and high in cost, the consumption of metal ions is large in the preparation process of the organic metal complex collecting agent, and the flotation efficiency of ilmenite is low are solved.

The invention belongs to the technical field of organic / inorganic functional compound adsorbents and provides a hydroximic acid functionalized polymer / inorganic compound adsorbent capable of efficiently adsorbing flavonoids substances and a preparation method thereof, aiming at overcoming the disadvantages of materials used by existing extraction and purification of the flavonoids substances that the extraction rate is low, the purity is not high and the reusability is poor and the like. The hydroximic acid functionalized polymer / inorganic compound adsorbent is composed of micron-grade silicon dioxide and a hydroximic acid functionalized polymer with a hydrogen bond mutual effect on a flavonoids compound. The hydroximic acid functionalized polymer is composed of two substances including a hydroximic acid functional group and polystyrene, and salicylhydroxamic acid forms the hydroximic acid functional group. The adsorbent has an ultrahigh adsorption property on the flavonoid compound, and the adsorption amount on quercetin reaches 452mg / g; the hydroximic acid functionalized polymer / inorganic compound adsorbent is insoluble, has micron-grade particles and is convenient to separate. In a utilization process, the adsorbent can be regenerated by an alkali solution with an electrolyte and can be repeatedly utilized. The adsorbent provided by the invention has the advantages that a preparation process is simple, performances are stable, the treatment speed is rapid, and purification operation of a flavonoid rough extracting solution in Chinese herbal medicines is simple, convenient and feasible.

The invention relates to a novel casting rust-preventing cover layer belonging to the field of packaging materials. The novel casting rust-preventing cover layer comprises 15-75 parts of polyethylene, 15-75 parts of polypropylene, 3-5 parts of dispersing agent, 2-5 parts of smoothing agent and 5-10 parts of rust preventing master batch, wherein the rust preventing master batch comprises at least one of sebacate, molybdate, carboxylate, phytate and salicylhydroxamic acid. The novel casting rust-preventing cover layer has high flexibility and strength, and can be well pasted on the surface of a metal product. The invention also relates to a preparation method of the novel casting rust-preventing cover layer. The preparation method comprises the following steps: uniformly mixing the polyethylene, polypropylene and rust preventing master batch to obtain a base material; adding the dispersing agent and smoothing agent in the base material, and uniformly stirring to obtain a mixture; and putting the mixture into an extruder, extruding, and cooling to obtain the novel casting rust-preventing cover layer, wherein the temperature in the extruder is 120-190 DEG C, and the temperature at an extrusion die head of the extruder is 190-280 DEG C.

The invention discloses a preparation method of a terbium organic composite nanoprobe for detecting fluorine ions in an aqueous solution. The preparation method comprises the steps of taking a coronal terbium-gallium dication complex as a detection signal source; and mixing and self-assembling the coronal terbium-gallium dication complex and a block copolymer F127 to prepare the terbium organic composite nanoprobe. The preparation method specifically comprises the steps of S1, mixing and coordinating terbium ions, gallium ions, salicylhydroxamic acid and sodium benzoate in methanol to prepare the coronal terbium-gallium dication complex; and S2, mixing the methanol solution of the coronal terbium-gallium dication complex prepared in the step S1 with a block copolymer F127, and stirring at room temperature to obtain a clear and transparent mixed solution; and S3, injecting deionized water into the mixed solution obtained in the step S2, and carrying out a rapid nano self-assembly reaction to obtain a terbium organic composite nano luminescent probe. The terbium organic composite nano luminescent material obtained by the invention is uniform in size, high in luminescent intensity and free of aggregation and precipitation phenomena, can realize rapid detection of fluorine ions in an aqueous solution, and has a response range of 0.19 ppm to 18.81 ppm.

The invention provides application of salicylhydroxamic acid to detection of hypochlorite and specifically discloses a fluorescence detection method for hypochlorite. The detection method uses salicylhydroxamic acid for quantitative detection of the content of hypochloric acid in a HEPES solution with a pH value of 7.4. The detection method shows high sensitivity and selectivity to hypochlorite; a detection reagent is cheap; detection process is easy, sensitive and rapid; and detection results are accurate.

The invention discloses an insecticidal composition containing chloropyridine, which is specially used for preventing and controlling rice planthoppers. The insecticidal composition contains active components and a synergist, wherein the ratio of the active components to the synergist is (95 to 99) to (1 to 5); the active components contain chloropyridine and rotenone in a mass ratio of (75 to 90)to (10 to 15); and the synergist is salicylhydroxamic acid. The insecticidal composition solves the problems of singular action mode, large dosage and easy generation of resistance of a single bactericide, and especially has a good prevent and control effect on the rice planthoppers.

The invention discloses a Paichongding-containing insecticidal composition for preventing and controlling rice planthoppers, which is prepared from active ingredients and a synergist, a ratio of the active ingredients to the synergist being (95 to 99):(1 to 5), wherein the active ingredients are Paichongding and rotenone, the mass ratio of which is (75 to 90):(10 to 15), and the synergist is salicylhydroxamic acid. The Paichongding-containing insecticidal composition not only solves the problems of single action modes, large dosage and easy resistance development existing in single fungicides,but also has a good prevention and control effect on the rice planthoppers in particular.

The invention relates to a preparation method of high-content liquid sodium salicylhydroxamic acid, which belongs to the field of preparation of mineral smelting materials. The preparation method of the present invention is that salicylate and hydroxylamine sulfate are subjected to a hydroximation reaction in a solution containing a polymer emulsifier and an alkali, followed by solid-liquid separation to obtain the liquid sodium salicylic hydroxamate; The polymer emulsifier described is phenylethylphenol formaldehyde resin polyoxyethylene ether, alkylphenol formaldehyde resin polyoxyethylene ether, alkylphenol polyoxyethylene polyoxypropylene ether, tristyrylphenol polyoxypropylene polyoxyethylene at least one of block polymers. The invention also provides the liquid sodium salicylhydroxamic acid prepared by the preparation method, the content of salicylic hydroxamic acid is 22.9%-23.8% based on salicylic hydroxamic acid. The invention has the characteristics of no need to add acid and alkali repeatedly, no waste water, high product utilization rate and high content.

The invention provides a preparation method of 1,2-benzisothiazole-3-ketone. The preparation method comprises the following steps of dissolving salicylhydroxamic acid into methanol; adding sodium hypochlorite with the concentration being 10 to 20 percent; taking a reaction for 20 to 40s at room temperature; performing dilution by distilled water; performing extraction by ethyl acetate; performing organic phase drying by distillation to obtain slight yellow solid; performing suction filtration to obtain a product of the 1,2-benzisothiazole-3-ketone. The method has the advantages that the synthesis process is simple; the cost is low; green and environment-friendly effects are achieved; the time is short; no byproduct is produced; the yield is as high as more than 82 percent.