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Preparation method of phenylallyl hydroxamic acid/acrylamide/methyl methacrylate copolymer for ore flotation

A technology of methyl methacrylate and phenylpropenyl hydroxamic acid, which is applied in the field of polymer chemical polymerization, can solve the problems of inability to achieve maximum income and low product yield, and achieve low mineral processing cost, low dosage, The effect of mild conditions

Inactive Publication Date: 2020-08-07
蚌埠泰鑫材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Phenylpropenyl hydroxamic acid is a hydroxamic acid that has been widely used in metal ores such as tungsten ore, tin ore, ilmenite, niobium iron ore, and rare earth ore in the past two years, such as the patent application number CN201810255387.3 , discloses phenylpropenyl hydroxamic acid and its preparation method and its application in tungsten ore flotation; such as the patent of application number CN201810249255.X, discloses phenylpropenyl hydroxamic acid in ilmenite and bastnaesite flotation However, the use of hydroxylamine hydrochloride-methyl phenylacrylate reaction method to prepare phenylpropenyl hydroxamic acid has a low product yield and cannot achieve maximum benefit

Method used

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  • Preparation method of phenylallyl hydroxamic acid/acrylamide/methyl methacrylate copolymer for ore flotation
  • Preparation method of phenylallyl hydroxamic acid/acrylamide/methyl methacrylate copolymer for ore flotation
  • Preparation method of phenylallyl hydroxamic acid/acrylamide/methyl methacrylate copolymer for ore flotation

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Embodiment 1

[0023] A kind of preparation method of phenylpropenyl hydroxamic acid / acrylamide / methyl methacrylate copolymer for ore flotation, comprises the following steps:

[0024] S1: Preparation of phenylpropenyl hydroxamic acid by hydroxylamine method: Dissolve 3-phenylacryloyl chloride in absolute ethanol at 50°C, then add hydroxamic acid agent and 25% ammonia water, stir in a water bath at 45°C for 3 hours, 3- The mass ratio of phenylacryloyl chloride, absolute ethanol, hydroxylamine hydrochloride, and ammonia water is 1:2:0.5:3 to obtain a reaction solution containing phenylacryl hydroxamic acid;

[0025] S2: According to the mass ratio of 1:0.5:1:4, add acrylamide, methyl methacrylate, and distilled water to the reaction solution containing phenylpropenyl hydroxamic acid obtained in S1, stir evenly and ultrasonically disperse to obtain a mixed monomer Dispersions;

[0026] S3: Heat the mixed monomer dispersion to 50°C, and pass nitrogen gas with a purity ≥ 99.9% into it, adjust t...

Embodiment 2

[0028] A kind of preparation method of phenylpropenyl hydroxamic acid / acrylamide / methyl methacrylate copolymer for ore flotation, comprises the following steps:

[0029] S1: Preparation of phenylpropenyl hydroxamic acid by hydroxylamine method: Dissolve 3-phenylacryloyl chloride in absolute ethanol at 50°C, then add hydroxamic acid agent and ammonia water with a concentration of 28%. The hydroxamic acid agent is hydroxylamine sulfate, A mixture of equal masses of hydroxylamine hydrochloride was stirred and reacted in a water bath at 55°C for 4.5 hours. The mass ratio of 3-phenylacryloyl chloride, absolute ethanol, hydroxamic acid agent, and ammonia water was 1:2.5:0.6:4, and the mixture containing phenylpropenyl hydroxyl The reaction solution of oxamic acid;

[0030] S2: Add acrylamide, methyl methacrylate, and distilled water into the reaction solution containing phenylpropenylhydroxamic acid obtained in S1 at a mass ratio of 1:1:1.1:6, stir evenly and ultrasonically disperse...

Embodiment 3

[0033] A kind of preparation method of phenylpropenyl hydroxamic acid / acrylamide / methyl methacrylate copolymer for ore flotation, comprises the following steps:

[0034] S1: Preparation of phenylpropenylhydroxamic acid by the hydroxylamine method: Dissolve 3-phenylacryloyl chloride in absolute ethanol at 60°C, then add hydroxylamine sulfate and 30% ammonia water, stir in a water bath at 60°C for 6 hours, 3-phenyl The mass ratio of acryloyl chloride, absolute ethanol, hydroxylamine sulfate, and ammonia water is 1:3:0.7:5 to obtain a reaction solution containing phenylpropenyl hydroxamic acid;

[0035] S2: According to the mass ratio of 1:1.5:1.2:8, add acrylamide, methyl methacrylate, and distilled water to the reaction solution containing phenylpropenylhydroxamic acid obtained in S1, stir evenly and ultrasonically disperse to obtain a mixed monomer Dispersions;

[0036] S3: Heat the mixed monomer dispersion to 65°C, and pass nitrogen gas with a purity ≥99.9% into it, adjust t...

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Abstract

The invention discloses a preparation method of a phenylallyl hydroxamic acid / acrylamide / methyl methacrylate copolymer for ore flotation, which comprises the following steps: S1: dissolving 3-phenylacryloyl chloride in 50 DEG C absolute ethyl alcohol, adding a hydroxamic acid agent and ammonia water, and carrying out water bath stirring reaction at 45-60 DEG C for 3-6 hours to obtain a reaction solution; s2, adding acrylamide, methyl methacrylate and distilled water into the reaction solution obtained in the step S1, uniformly stirring, and carrying out ultrasonic dispersion to obtain a mixedmonomer dispersion solution; and S3, heating the mixed monomer dispersion liquid to 50-65 DEG C, introducing nitrogen with the purity of more than or equal to 99.9% into the mixed monomer dispersion liquid, adjusting the pH value to 7.5-8.0, adding an initiator for induction to polymerize the monomer, reacting for 3 hours, concentrating and drying to obtain the terpolymer. According to the method,the hydroxylamine-acyl chloride method is used for hydroximation of the 3-phenyl acryloyl chloride, the hydroximation rate is high, the product yield is high, the flotation effect is good, and the beneficiation cost is low.

Description

technical field [0001] The invention belongs to the field of macromolecule chemical polymerization, and in particular relates to a preparation method of phenylacryl hydroxamic acid / acrylamide / methyl methacrylate copolymer for ore flotation. Background technique [0002] Hydroxamic acid compounds are carboxylic acid derivatives in which the carboxyl divalent oxygen in a carboxylic acid molecule is replaced by an oxime group. Because its molecular structure has oxygen and nitrogen containing a lone pair of electrons and its positions are close to each other, it is sensitive to metal ions. It has high selectivity and generates stable chelates, and is widely used in the fields of flotation of metal oxide ores, metallurgy, solvent extraction, wastewater treatment, and medicine. Compared with conventional alkyl dithiocarbamate, xanthate, fatty alcohol and ether alcohol flotation agents, hydroxamic acid flotation agents have stronger capture ability, 2+ , Fe 3+ , Zn 2+ , Sn 4+ ...

Claims

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Application Information

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IPC IPC(8): C08F220/58C08F220/56C08F220/14B03D1/016B03D103/02
CPCB03D1/016B03D2203/02C08F220/58C08F220/56C08F220/14
Inventor 王文爽陈超
Owner 蚌埠泰鑫材料技术有限公司
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