36 results about "Salicylhydroxamic acid" patented technology

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 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.

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 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 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.