Dehydrating agent for aluminum hydroxide and preparation method thereof

A technology of aluminum hydroxide and dehydrating agent, which is applied in chemical instruments and methods, separation methods, inorganic chemistry, etc., can solve the problems of large foam and affect production, and achieve the effect of wide application, strong effect and small amount of foam

Pending Publication Date: 2021-10-15
中铝中州铝业有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the interstitial water between the particles is the main component of the material and does not interact with the solid, it can be removed by simple concentration or using a small mechanical force, while there is a gap between other types of water and the aluminum hydroxide particles The effect of a certain "force", although it only occupies a small part in the slurry, its content is still far beyond the content of solid matter, especially capillary water, which seriously affects the moisture content of aluminum hydroxide, and a dehydrating agent is required Auxiliary separation, and separation with the help of large pressure difference negative pressure or high pressure or mechanical force field generated by external machinery
However, in the separation process, strong conveying equipment is required, resulting in a large amount of foam, which seriously affects production

Method used

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  • Dehydrating agent for aluminum hydroxide and preparation method thereof
  • Dehydrating agent for aluminum hydroxide and preparation method thereof
  • Dehydrating agent for aluminum hydroxide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of dehydrating agent for aluminum hydroxide, its composition comprises by weight percentage: nonionic surfactant: fatty alcohol polyoxyethylene ether (EO9) 7%, zwitterionic surfactant: dodecyl dimethyl betaine 4%, anionic surfactant: sodium lauryl sulfate, sodium dodecylbenzenesulfonate 11%, auxiliary agent: silicone defoamer 1%, organic amine salt active agent: dodecyl trimethyl Ammonium chloride 2%, water: 75%.

[0027] A kind of preparation method of aluminum hydroxide dehydrating agent is as follows:

[0028] According to the above ratio, heat the required water to 50°C, then add dodecyltrimethylammonium chloride, stir until the organic ammonium salt compound is completely dissolved, and then add fatty alcohol polyoxyethylene ether (EO9) in sequence , dodecyl dimethyl betaine, sodium lauryl sulfate, sodium dodecyl benzene sulfonate, organic silicon defoamer, etc., to obtain the dehydrating agent for aluminum hydroxide, called Take a certain amount of dehydr...

Embodiment 2

[0030] A kind of dehydrating agent for aluminum hydroxide, its composition comprises by weight percentage: nonionic surfactant: polyoxyethylene ether polyoxypropylene ether block polymer 14%, zwitterionic surfactant: hexadecylsulfonic acid Base betaine 2%, anionic surfactant: sodium fatty alcohol polyoxyethylene ether sulfonate 7%, auxiliary agent: silicone defoamer 1%, organic amine salt active agent: dodecyltrimethylammonium chloride 1%, water: 75%.

[0031] A kind of preparation method of aluminum hydroxide dehydrating agent is as follows:

[0032] According to the above ratio, heat the required water to 50°C, then add dodecyltrimethylammonium chloride, stir until the organic ammonium salt compound is completely dissolved, then add polyoxyethylene ether polyoxypropylene ether embedded Segment polymer, cetyl sulfonate betaine, sodium fatty alcohol polyoxyethylene ether sulfonate, organic silicon defoamer, etc., to obtain the dehydrating agent for aluminum hydroxide. Weighe...

Embodiment 3

[0034] A kind of dehydrating agent for aluminum hydroxide, its composition comprises by weight percent: nonionic surfactant: fatty alcohol polyoxyethylene ether (EO9) 10%, zwitterionic surfactant: dodecyl dimethyl betaine 2%, anionic surfactant: fatty alcohol polyoxyethylene ether sodium sulfate 11%, auxiliary agent: silicone defoamer 1%, organic amine salt active agent: dodecyltrimethylammonium chloride 1%, water : 75%.

[0035] A kind of preparation method of aluminum hydroxide dehydrating agent is as follows:

[0036] According to the above ratio, heat the required water to 50°C, then add dodecyltrimethylammonium chloride, stir until the organic ammonium salt compound is completely dissolved, and then add fatty alcohol polyoxyethylene ether (EO9) in sequence , lauryl dimethyl betaine, sodium fatty alcohol polyoxyethylene ether sulfate, silicone defoamer and other substances, that is, to obtain the dehydrating agent for aluminum hydroxide, combined with the above evaluation...

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Abstract

The invention discloses a dehydrating agent for filtration in an aluminum oxide production process and a preparation method thereof. The dehydrating agent comprises the following components in percentage by weight: 7-15% of a nonionic surfactant, 2-4% of a zwitterionic surfactant, 7-15% of an anionic surfactant, 1-2% of an auxiliary agent, 0.5-2% of an organic amine salt active agent and the balance of water. The dehydrating agent disclosed by the invention is strong in dehydrating effect, green, low in foam and low in cost. The dehydrating agent can change the physical property and chemical composition of the material surface, destroy the structure formed by aluminum hydroxide and water, and effectively reduce the surface tension of water, thereby improving the dehydration performance of aluminum hydroxide. Meanwhile, due to the addition of the auxiliary agent, the surface tension of the dehydrating agent during action is effectively reduced, and the foaming capacity of the surfactant in the dehydrating process is effectively inhibited, so that the dehydrating agent has low foam.

Description

technical field [0001] The invention relates to the technical field of alumina production, in particular to a dehydrating agent for aluminum hydroxide and a preparation method thereof. Background technique [0002] In alumina production, the water content of aluminum hydroxide is a technical index that must be strictly controlled in the filtration process, and it plays an important role in stabilizing the operation of the roasting kiln. Reducing the water attached to the finished aluminum hydroxide can not only reduce the oil consumption during roasting, but also reduce the alkali consumption and improve the product quality due to the improvement of the filtrate recovery rate. With the improvement of roasting process and equipment, such as the use of fluidized roaster, more stringent requirements are put forward for the water attached to aluminum hydroxide, and effective measures are taken in production to reduce the water attached to aluminum hydroxide. [0003] The litera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26C01F7/44B01D37/02
CPCB01J20/262B01J20/26C01F7/44B01D37/025
Inventor 张燕娜王永平莫进超王凯李烽克左林举刘占强黄春城印海芳周志恒陈洪德王庆玲张臻苏路路
Owner 中铝中州铝业有限公司
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