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A scale inhibitor used in the production process of alumina

A production process and technology of scale inhibitor, applied in the field of scale inhibitor, can solve problems such as scarring on the surface of heat exchange, and achieve the effect of remarkable scale inhibition effect, high scale inhibition rate and less dosage

Active Publication Date: 2018-10-23
湖南诺兰蒂尔环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a scale inhibitor used in the production process of alumina, which can effectively solve the problem of scabbing on the heat exchange surface when the solid content in the sodium aluminate solution is high Anti-scaling problem

Method used

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  • A scale inhibitor used in the production process of alumina
  • A scale inhibitor used in the production process of alumina
  • A scale inhibitor used in the production process of alumina

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Inject 150ml of the above solution into one group of PP bottles respectively, among which no scale inhibitor is added to the three solutions as the blank group A1 to take the average value, and 300ppm of different polymethacrylic acid + 1-butyl-3 are added to other solutions -Methylimidazolium bromide forms different scale inhibitors (see Table 1 for details), test according to the above method, and the test results are as follows in Table 1:

[0044] Table 1

[0045]

[0046] The results in the table are the average of three parallel experiments.

Embodiment 2

[0048] Inject 150ml of the above-mentioned solutions into one group of PP bottles respectively, among which 3 solutions do not add scale inhibitors as the blank group B1 to take the average value, and add 300ppm of scale inhibitors composed of different anions and cations to other solutions (see table for details 2), the ratio is 1:1, according to the above method test, the test results are as follows in Table 2:

[0049] Table 2

[0050]

[0051]

[0052] The results in the table are the average of three parallel experiments.

Embodiment 3

[0054] Inject 150ml of the above-mentioned solutions into one group of PP bottles respectively, among which no scale inhibitor was added to the three solutions as the blank group C1 to take the average value, and other solutions were added with different dosages of scale inhibitors of the same composition (see Table 3 for details ), the ratio is 1:1, according to the above method test, the test results are as follows in Table 3:

[0055] table 3

[0056]

[0057] The results in the table are the average of three parallel experiments.

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Abstract

The invention discloses scale inhibitor used in an aluminum oxide production process.The scale inhibitor comprises a cationic surface active agent and an anionic surface active agent, the cationic surface active agent comprise one or more organic cationic compounds, and the anionic surface active agent comprises homopolymers or copolymers of one or more poly carboxylic acid anionic polymers.The scale inhibitor is a composition of anionic polymers and cationic polymers, less scale inhibitor is consumed, the scale inhibiting ratio is as high as 90% or above, the scale inhibiting effect is remarkable, and the scale inhibiting problem that a sodium aluminate solution high in solid content is scabbed in the heating process can be well solved.

Description

technical field [0001] The invention relates to a scale inhibitor used in the production process of alumina, which belongs to the technical field of chemical industry. Background technique [0002] The method of leaching alumina directly from bauxite or sintered bauxite is widely used in industry to produce alumina, which is usually divided into so-called Bayer method or sintering method. The sintering method was invented in 1858, which is to sinter the charge composed of soda ash and bauxite at high temperature to obtain the sintered product of solid sodium aluminate, then dissolve the sodium aluminate with soda ash, and pass CO2 after removing impurities. 2 The gas is decomposed to produce aluminum hydroxide, and the remaining sodium aluminate solution is evaporated to remove excess water and reused for processing the next batch of bauxite. The Bayer method was invented by Austrian engineer Karl Joseph Bayer in 1887. Its basic principle is to convert concentrated sodium h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F5/08
CPCC01F7/06C01F7/14
Inventor 罗春
Owner 湖南诺兰蒂尔环保科技有限公司