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Special defoamer for alumina plant and preparation method thereof

A kind of technology of alumina plant and defoamer, which is applied in the direction of chemical instruments and methods, separation methods, foam dispersion/prevention, etc., can solve the problems of inability to achieve defoaming effect, high price, increase production cost, etc., and achieve defoaming performance The effects of stability, reduced dosing amount, and improved defoaming effect

Active Publication Date: 2020-12-18
邢国艾
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above defoaming agents are all suitable for specific production processes, and cannot achieve the ideal defoaming effect when used for defoaming aluminum hydroxide semen at high temperature and high alkalinity
At present, most alumina factories in China use foreign defoamer products, such as Nalco's defoamer series. The defoamer effect of foreign products is good, but the price is very high, which greatly increases the production cost.

Method used

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  • Special defoamer for alumina plant and preparation method thereof
  • Special defoamer for alumina plant and preparation method thereof
  • Special defoamer for alumina plant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The raw materials and mass parts thereof of defoamer are as follows:

[0025]

[0026] First add isomeric tridecyl alcohol polyoxyethylene ether, lauryl alcohol polyoxyethylene ether, and polypropylene glycol into the reaction kettle in proportion, start stirring, raise the temperature to 45°C, and add sorbitan monooleate polyoxyethylene ether in proportion And paraffin-based neutral oil 150SN, stirring for 30min. Add 10wt% sodium hydroxide aqueous solution dropwise into the reaction kettle at a rate of 100L / h. After the dropwise addition, stir for another 30 minutes and cool down to room temperature to obtain the special defoamer for alumina plants.

Embodiment 2

[0028] The raw materials and mass parts thereof of defoamer are as follows:

[0029]

[0030] First add isomeric tridecyl alcohol polyoxyethylene ether, lauryl alcohol polyoxyethylene ether, and polypropylene glycol into the reaction kettle in proportion, start stirring, raise the temperature to 50°C, and add sorbitan monooleate polyoxyethylene ether in proportion And paraffin-based neutral oil 60SN, stirring for 40min. Add 12wt% sodium hydroxide aqueous solution to the reactor dropwise at a rate of 80 L / h. After the dropwise addition, stir for another 20 minutes and cool down to room temperature to obtain the special defoamer for alumina plants.

Embodiment 3

[0032] The raw materials and mass parts thereof of defoamer are as follows:

[0033]

[0034] First add isomeric tridecyl alcohol polyoxyethylene ether, lauryl alcohol polyoxyethylene ether, and polypropylene glycol into the reaction kettle in proportion, start stirring, raise the temperature to 50°C, and add sorbitan monooleate polyoxyethylene ether in proportion And paraffin-based neutral oil 60SN, paraffin-based neutral oil 150SN, stirred for 40min. Add 12wt% sodium hydroxide aqueous solution dropwise to the reactor at a rate of 90 L / h. After the dropwise addition, stir for another 30 minutes and cool down to room temperature to obtain the special defoamer for alumina plants.

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Abstract

The invention relates to the technical field of aluminum oxide production, in particular to an anti-foaming agent special for an aluminum oxide plant and a preparation method of the anti-foaming agent. The anti-foaming agent special for the aluminum oxide plant is prepared from, by mass, 25-30 parts of base oil, 30-35 parts of polypropylene glycol, 20-25 parts of iso-tridecanol polyoxyethylene ether, 15-20 parts of polyoxyethylene lauryl ether, 5-10 parts of Tween 80 and 2-3 parts of sodium hydroxide. The anti-foaming agent has an excellent eliminating effect on foam generated by aluminum hydroxide refined liquid, and has a good foam inhibition effect, the stability of the product is high, the agent adding amount is low, the performance of the anti-foaming agent is similar to that of the foreign Nalco similar products, but the price is lower than that of the similar products, and the cost performance is more outstanding. The invention further provides a preparation method of the anti-foaming agent.

Description

technical field [0001] The invention relates to the technical field of alumina production, in particular to a special defoamer for alumina plants and a preparation method thereof. Background technique [0002] In the alumina production process, the decomposition process is one of the most important links. In the decomposition process, due to the presence of organic matter in bauxite and external additives, as the organic matter is enriched in the system, a large amount of foam is caused. The existence of a large number of foams can easily produce false liquid levels, which directly affect production. Therefore, defoamers must be added in this process to eliminate the impact of foam. At the same time, aluminum hydroxide semen has high temperature and strong alkalinity. Antifoaming agents are less effective and cannot meet production needs well. [0003] Patent CN 201810676773.X discloses a defoamer for wastewater treatment and its preparation method. Modified silicone oil, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D19/04
CPCB01D19/0404
Inventor 翟金义
Owner 邢国艾
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