A kind of high-content liquid sodium salicylhydroxamate and its preparation method and application

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

Active Publication Date: 2022-02-08
湖南中科矿冶技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • A kind of high-content liquid sodium salicylhydroxamate and its preparation method and application
  • A kind of high-content liquid sodium salicylhydroxamate and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] 50 g of salicylic acid methyl ester and 0.6 g of a group of ethylphenol formaldehyde resin polyoxyethylene ether (Xingtai Blue Sky Fine Chemical Co., Ltd., 400 # Fragmata 400 #), stir well, 55 grams of water, stir emulsification. After 29.6 g of hydroxylamine sulfate, 95 grams of 40% sodium hydroxide solution were added dropwise, and the reaction liquid temperature was added dropwise at 28-29 ° C, and the pH was not more than 12, and the drop was added (1.5 hours). The insulation reaction was 3 hours and then warmed to 40 ° C, and the reaction was 3 hours. After the reaction was completed, the precipitated salt was filtered to give a solution of sodium hydroctyl hydroctamate, and the hydroxyhydroxamic acid content was 23.5%. Gas chromatography is tracked, and the product is stable in 6 months, no decomposition by-product.

Embodiment 2

[0047] Add 50 grams of salicylic acid methyl ester and 0.7 g of a group of ethylphenylphenylhydedehyde resin polyoxyethylene ether (Xingtai Blue Sky Fine Chemical Co., Ltd., 400 # Fragmata 400 #), stir well, 55 grams of water, stir emulsification. After 29.6 g of hydroxylamine sulfate, 95 grams of 40% sodium hydroxide solution were added dropwise, and the reaction liquid temperature was added dropwise at 28-29 ° C, and the pH was not more than 12, and the drop was added (1.5 hours). The insulation reaction was 3 hours and then warmed to 40 ° C, and the reaction was 3 hours. After the reaction was completed, the precipitated salt was removed, and the solution of clearing and clear hydroctamate was removed, with water pocarboxamic acid, the hydroxamic acid content was 23.4%. Gas chromatography is tracked, and the product is stable in 6 months, no decomposition by-product.

Embodiment 3

[0049] 50 g of salicylic acid methyl ester and 0.6 g of alkylphenol formaldehyde resin polyoxyethylene ether (Knot Didian Chemical Co., Ltd., 700 # 700 #), stirred well, add 55 grams of water, stir the emulsification . After 29.6 g of hydroxylamine sulfate, 95 grams of 40% sodium hydroxide solution were added dropwise, and the reaction liquid temperature was added dropwise at 28-29 ° C, and the pH was not more than 12, and the drop was added (1.5 hours). The insulation reaction was 3 hours and then warmed to 40 ° C, and the reaction was 3 hours. After the reaction was completed, the precipitated salt was removed, and the solution of clear and clear hydroctamate was obtained, and the water pork hydroxamic acid was 22.9%. Gas chromatography is tracked, and the product is stable in 6 months, no decomposition by-product.

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Abstract

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.

Description

Technical field [0001] The present invention belongs to the field of flotation pharmaceutical, and is related to sodium hydroctyl hydroxamate. Background technique [0002] The hydroxamic acid hydroximyl group contains N atoms and O atoms, and they are isolated to electrons, belonging to weak electric donors, and it is easy to form a stable chelate with metal ions, and then add phenolic hydroxyl groups on the benzene ring. Hydroxy oathyl plays to synergist of metal ions. Therefore, hydroxamic acid is a class of selective chelating capture agent, which is widely used in various oxidation and rare earth flotations such as flotation tin stone, titanium iron ore, fluorocarbon ore and niobium ore. middle. [0003] At present, hydroxamic acid production is mainly obtained by hydroxymethyl hydroxylamine hydroxylamine hydroxylamine. There are two methods in the hydroxyethylization reaction, one is to remove the solvent after the reaction is completed, and the solvent is removed after the...

Claims

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Application Information

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Patent Type & Authority Patents(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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