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A kind of powder product of high-performance hydroxamated polymer and preparation method thereof

A polymer, high-performance technology, applied in the field of powder products of high-performance hydroxamated polymers and their preparation, can solve the problems of unstable flocculation effect, limited storage time, and high transportation costs, and achieves increased storage stability and reduced Transportation cost, effect of improving catch ability

Active Publication Date: 2020-11-17
ANHUI TIANRUN CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the domestic alumina industry generally uses products such as copolymers of acrylamide and sodium acrylate in the separation of red mud, mainly hydrosol, dry powder and inverse emulsion. Due to process limitations, the product viscosity is low, and only There are two groups of carboxyl and amino groups, which lead to a large amount of addition, unstable flocculation effect, poor ability to capture some small particles in the red mud slurry, high content of floating matter in the supernatant, and unsatisfactory use effect. Hydroxamic acid on the market The modified products are basically inverse emulsion type, there is no powder type modified product, the storage time of the emulsion type product is very limited, generally only half a year can be stored, the transportation cost of the emulsion product is much higher than that of the powder product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of preparation method of the powder product of high-performance hydroxamated polymer, comprises the steps:

[0027] (1) Add 200 g of water-soluble polymerizable monomer acrylamide and 50 g of 3-acrylimido-3-methylbutanoic acid, 0.2 g of crosslinking agent dimethylol phenolic resin, and 150 g of deionized water into the water phase tank , 1 g of initiator ammonium persulfate, 0.5 g of 2,2-azobis(2-amidinopropane) dihydrochloride, 0.5 g of potassium permanganate cumene hydroperoxide, stir to make it uniform, and obtain a single aqueous phase body.

[0028] (2) in the reaction kettle, add the alkane paraffin and kerosene (paraffin alkane: the weight ratio of kerosene is 1:1) by total weight of 600g, nonionic surfactant sorbitan fatty acid ester 7.5g, stearin Acid fatty alcohol ester 7.5g, stabilizing agent methylcellulose 5g, the reaction system that 2,2-azobis(2,4-dimethylvaleronitrile) weight 0.06g forms, the reaction system is heated with water bath, with stirri...

Embodiment 2

[0034] A kind of preparation method of the powder product of high-performance hydroxamated polymer, comprises the steps:

[0035] (1) Add 300g of water-soluble polymeric monomer acrylamide, 50g of itaconic acid, 50g of 2-acrylamido-2-methylpropanesulfonic acid, 0.5g of cross-linking agent phthalic acid, and deionized 200 g of water, 1.5 g of initiator sodium peroxodisulfate, 0.2 g of 2,2-azobis(2-amidinopropane) dihydrochloride, and 0.3 g of potassium peroxodisulfate were stirred to make them uniform to obtain a water phase monomer.

[0036] (2) Adding in the reactor is 700g by the total weight of alkane cyclohexane, nonionic surfactant fatty acid fatty alcohol ester 8g, alkyl alcohol amide polyoxyethylene ether 7g, stabilizer hydroxypropyl methylcellulose 5g, 4,4-azobis (4 cyano valeric acid) reaction system composed of 0.1g, heat the reaction system with a water bath, stir with a stirrer, the stirring speed is 400r / min, make the reaction system mix evenly and form an oily ph...

Embodiment 3

[0042] A kind of preparation method of the powder product of high-performance hydroxamated polymer, comprises the steps:

[0043] (1) Add 350g of water-soluble polymerizable monomer acrylamide, 40g of methacrylic acid and 40g of vinylbenzenesulfonic acid, 0.8g of crosslinking agent hexamethylenetetramine, 220g of deionized water, and Potassium disulfate 4g, stirred to make it uniform, to obtain the aqueous phase monomer.

[0044] (2) In the reaction kettle, the total weight of alkane paraffin is 700g, non-ionic surfactant polyoxyethylene fatty acid ester 6.5g, fatty acid fatty alcohol ester 8.5g, stabilizer hydroxyethyl cellulose 5g, 2,2-even Nitrogen bis{2-(5-methyl-imidazoline-2-methyl)propane} dihydrochloride 0.15g, heat the reaction system with a water bath, stir with a stirrer, the stirring speed is 400r / min, and mix the reaction system Uniform and in the form of an oil phase, nitrogen is passed from the bottom of the reaction system to the reaction system.

[0045] (3)...

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Abstract

The invention provides a high-performance hydroxamated polymer powder product and a preparation method thereof, and belongs to the technical field of preparation of alumina red mud sedimentation and separation agents. The present invention adopts a highly efficient and stable system, and uses a two-step reverse-phase suspension polymerization process to prepare polymers with different hydroxamic acid content and network structure, and then deoil, dehydrate and dry through vacuum distillation, and finally obtain high-performance hydroxamic acid polymerization powder method. By adjusting the process, polymer powder products with different molecular weights and different hydroxamic acid contents can be prepared, and the molecular weight of the prepared product is 9.9-14 million. The product prepared by the method of the invention has a more extended network structure, enhances the capture performance, and can be used as a separating agent to improve the capture capacity of the suspended particles in the alumina slurry. This technology fills the technical gap that there is no powder-type hydroxamic acid polymer product at present, solves the problems of short storage time and high transportation cost of the original emulsion product, and has great practicability.

Description

technical field [0001] The invention relates to a high-performance hydroxamated polymer powder product and a preparation method thereof, and belongs to the technical field of preparation of alumina red mud sedimentation and separation agents. Background technique [0002] Red mud is an industrial waste formed during the production of alumina. It has high alkali content, poor fluidity, small particle size, easy scarring, and small density difference between liquid and solid particles. With the rapid development of the domestic alumina production industry, the separation of red mud has gradually become a bottleneck in the alumina production process, which greatly limits the development of my country's alumina production industry. In the alumina production process, in order to obtain pure sodium aluminate solution that can meet the production requirements, the sedimentation and separation of red mud is an indispensable process in the alumina production process. At present, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F220/52C08F8/32C08F222/02C08F220/38C08F220/06C08F212/14C08F220/20
CPCC08F8/32C08F220/56C08F222/02C08F220/382C08F220/06C08F212/14
Inventor 刘彭城汪艳陈建波陶阿晖李大强张传银王全飞胡琼
Owner ANHUI TIANRUN CHEM CO LTD