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PAH-containing composite inhibitor as well as preparation method and application thereof

A technology of compound inhibitor and mixed solution, which is applied in chemical instruments and methods, preparation of alkali metal aluminate/alumina/aluminum hydroxide, aluminum compound, etc. Ideal and other issues, to achieve significant economic benefits

Inactive Publication Date: 2020-05-15
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The first object of the present invention is to provide a kind of composite inhibitor containing high molecular weight acrylic acid-hydroxypropyl acrylate copolymer (abbreviated as PAH), which can effectively solve the problem of large amount of existing inhibitor added, unsatisfactory inhibitory effect and discoloration. Affect product quality and other issues;

Method used

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  • PAH-containing composite inhibitor as well as preparation method and application thereof
  • PAH-containing composite inhibitor as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1 (preparation of acrylic acid-hydroxypropyl acrylate copolymer PAH):

[0039] Weigh 0.13g of ammonium persulfate and put it in a 100ml four-neck flask, add 17ml of distilled water, heat the water bath at 30°C, stir and dissolve, add 9.5g of acrylic acid, stir evenly to obtain mixed liquid A; In a beaker, add 17ml of distilled water to dissolve, after dissolving, add 8.6g of hydroxypropyl acrylate and 0.12g of mercaptopropionic acid to the beaker, stir and mix to obtain mixed solution B, add mixed solution B to the constant pressure funnel, slowly Add dropwise (1 drop / s) into a four-necked flask, and stir while adding dropwise. After the dropwise addition, the stirring was continued for 4h to obtain light yellow viscous liquid C. Pour the viscous liquid C into a large beaker containing 200ml of absolute ethanol, stir to dissolve the unreacted monomer, remove the supernatant after standing, and obtain a colorless transparent solid precipitate after centrifuga...

Embodiment 2

[0040] Embodiment 2 (preparation and application of composite inhibitor):

[0041] Weigh 0.021 g of the PAH polymer prepared in Example 1 and 0.014 g of commercially available sodium polyacrylate, and mix the two to obtain a composite inhibitor. The composite inhibitor of 0.035g (being 0.07% of clinker amount) is dissolved in the 200ml adjustment liquid A that leaching clinker is used to obtain adjustment liquid B, and adjustment liquid B is added in the there-necked flask, is placed in constant temperature water bath and is heated to 80 ℃ and keep warm. Weigh 50g of sintered alumina sintered clinker and add it to the adjustment liquid B, stir and mix evenly at a stirring speed of 300r / min, start the leaching timer, and the leaching time is 70min. After leaching, dry filter, accurately weigh the volume of the filtrate, analyze at constant volume, and calculate the leaching rate of alumina. Comparing the calculation results with the leaching rate of blank alumina in the same ...

Embodiment 3

[0042] Embodiment 3 (comparative test of embodiment 2):

[0043] Weigh 0.035g of commercially available sodium polyacrylate (PAAS) (0.07% of the amount of clinker) and dissolve it in 200ml of adjusting solution A for leaching clinker to obtain adjusting solution B, add adjusting solution B in a three-necked flask, and place at constant temperature Heat to 80°C in a water bath and keep warm. Weigh 50g of sintered alumina sintered clinker and add it to the adjustment solution B, stir with a polytetrafluoroethylene stirring paddle at a stirring speed of 300r / min, start the leaching timer, and the leaching time is 70min. After leaching, dry filter, accurately weigh the volume of the filtrate, analyze at constant volume, and calculate the leaching rate of alumina. Comparing the calculation results with the leaching rate of blank alumina in the same leaching process without adding inhibitors, it is obtained that the inhibitor increases the leaching rate of alumina, and the leaching...

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Abstract

The invention relates to an alumina production technology, and relates to a novel composite inhibitor containing a high molecular weight acrylic acid-hydroxypropyl acrylate copolymer (PAH for short),and a preparation method and an application thereof. By adding the composite inhibitor in the leaching process of an alumina sintered clinker, the problems that an existing inhibitor is large in addition amount and not ideal in inhibition effect, and product quality is affected by colors are effectively solved. On the premise that the adding amount for industrial production is met and the productquality is not affected, the leaching rate of alumina is increased by 2%-4% compared with the yield when no inhibitor is added, the yield of alumina is increased by about 2.0% compared with the yieldwhen an existing sodium polyacrylate inhibitor with a good inhibition effect is added, and the economic benefits are remarkable.

Description

technical field [0001] The present invention relates to alumina production technology, to be precise, it is a novel composite inhibitor containing high molecular weight acrylic acid-hydroxypropyl acrylate copolymer (abbreviated as PAH) and its preparation method and application. Suppressing the secondary reaction in the dissolution process of sintered alumina clinker can increase the dissolution rate of clinker alumina. Background technique [0002] my country's high-grade bauxite resources are scarce, and the import of bauxite has accounted for more than 60% of the annual consumption for many years. Therefore, from the perspective of our country's existing resources, it is urgent to find alternative resources for bauxite and develop a process suitable for the production of alumina from low-grade bauxite and the extraction of alumina from aluminum-containing resources such as high-alumina fly ash. Soda lime sintering method is one of the more mature and effective methods fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/08C08F220/20C08F220/06
CPCC01F7/085C08F220/20C08F220/06C08F2500/01
Inventor 佟志芳林鑫李英杰张玉衡温皓
Owner JIANGXI UNIV OF SCI & TECH
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