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High-content liquid sodium salicylhydroxamic acid as well as preparation method and application thereof

A technology of sodium salicylate hydroxamate and salicylate, applied in solid separation, organic chemistry, flotation and other directions, can solve problems such as increasing the difficulty of wastewater treatment, achieve high product utilization rate and effective content, save production costs, The effect of improving product utilization

Active Publication Date: 2019-05-28
湖南中科矿冶技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, in the process of alkali addition-acid addition-alkali addition, not only a large amount of acid and alkali are repeatedly consumed, but also a large amount of waste water treatment problems are caused, and the waste water contains a part of salicylic hydroxamic acid soluble in water, which further increases the quality of the waste water. The difficulty of handling has become a problem that plagues enterprises

Method used

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  • High-content liquid sodium salicylhydroxamic acid as well as preparation method and application thereof
  • High-content liquid sodium salicylhydroxamic acid as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Add 50 grams of methyl salicylate and 0.6 grams of phenylethylphenol formaldehyde resin polyoxyethylene ether (Xingtai Lantian Fine Chemical Co., Ltd., Nongru 400#) into a three-necked flask, stir evenly, add 55 grams of water, and stir emulsification. Add 29.6 grams of hydroxylamine sulfate, after dissolving, add 95 grams of 40% sodium hydroxide solution dropwise, control the temperature of the reaction solution at 28-29° C. during the dropwise addition, and the pH value is not more than 12, after the dropwise addition (1.5 hours), Insulate and react for 3 hours, then raise the temperature to 40° C., and react for 3 hours. After the reaction was completed, the precipitated salt was removed by filtration to obtain a clear and transparent solution of sodium salicylhydroxamic acid. In terms of salicylhydroxamic acid, the content of salicylhydroxamic acid was 23.5%. The product is tracked by gas chromatography, and the product has good stability within 6 months without de...

Embodiment 2

[0047] Add 50 grams of methyl salicylate and 0.7 grams of phenylethylphenol formaldehyde resin polyoxyethylene ether (Xingtai Lantian Fine Chemical Co., Ltd., Nongru 400#) into a three-necked flask, stir well, add 55 grams of water, and stir emulsification. Add 29.6 grams of hydroxylamine sulfate, after dissolving, add 95 grams of 40% sodium hydroxide solution dropwise, control the temperature of the reaction solution at 28-29° C. during the dropwise addition, and the pH value is not more than 12, after the dropwise addition (1.5 hours), Insulate and react for 3 hours, then raise the temperature to 40° C., and react for 3 hours. After the reaction was completed, the precipitated salt was removed by filtration to obtain a clear and transparent solution of sodium salicylhydroxamic acid. In terms of salicylhydroxamic acid, the content of salicylhydroxamic acid was 23.4%. The product is tracked by gas chromatography, and the product has good stability within 6 months without deco...

Embodiment 3

[0049] Add 50 grams of methyl salicylate and 0.6 grams of alkylphenol formaldehyde resin polyoxyethylene ether (Handan Xindia Chemical Co., Ltd., Nongru 700#) into a three-necked flask, stir evenly, add 55 grams of water, stir and emulsify . Add 29.6 grams of hydroxylamine sulfate, after dissolving, add 95 grams of 40% sodium hydroxide solution dropwise, control the temperature of the reaction solution at 28-29° C. during the dropwise addition, and the pH value is not more than 12, after the dropwise addition (1.5 hours), Insulate and react for 3 hours, then raise the temperature to 40° C., and react for 3 hours. After completion of the reaction, the precipitated salt was removed by filtration to obtain a clear and transparent solution of sodium salicylhydroxamic acid. In terms of salicylhydroxamic acid, the content of salicylhydroxamic acid was 22.9%. The product is tracked by gas chromatography, and the product has good stability within 6 months without decomposition by-pro...

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Abstract

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.

Description

technical field [0001] The invention belongs to the field of flotation agents, and relates to a liquid sodium salicylate hydroxamate. Background technique [0002] The hydroxime group of salicylic hydroxamic acid contains N atom and O atom, they all have lone pair electrons, belong to weak electron donor, it is easy to form a stable chelate with metal ion, plus the phenolic hydroxyl group on the benzene ring, can be combined with The hydroxime group plays the role of synergistically chelating metal ions. Therefore, salicylic hydroxamic acid is a kind of chelating collector with good selectivity, which is widely used in the flotation of various oxide ores and rare earths such as ilmenite, bastnaesite and niobium-tantalum ore. middle. [0003] At present, the production of salicylic hydroxamic acid is mainly obtained by hydroximating methyl salicylate with hydroxylamine hydrochloride. Hydroximation reaction has two kinds of methods, and a kind of is to be solvent with methy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C259/10B03D1/01B03D101/02
Inventor 孙昱符剑刚李春林蒋泽斌
Owner 湖南中科矿冶技术有限公司
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