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Environment-friendly aluminum hydroxide dehydration filter aid

A technology of aluminum hydroxide and filter aid, which is applied in the chemical field, can solve the problems of less industrial experiments, high price, and poor effect, and achieve the effect of low cost, less usage, and improved dehydration rate

Inactive Publication Date: 2011-11-30
JINAN YIYIN TECH & TRADE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the dehydration effect is good, the price is expensive (50,000-60,000 / ton)
There are many literature reports on dehydration and filter aids in China, but few industrial trials have been carried out, and they have not been popularized due to price problems or poor effects.

Method used

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  • Environment-friendly aluminum hydroxide dehydration filter aid
  • Environment-friendly aluminum hydroxide dehydration filter aid
  • Environment-friendly aluminum hydroxide dehydration filter aid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] 29.0 grams of deionized water were placed in a 200 ml beaker, and then 22.5 grams of natural carboxylate were weighed; AEO-9, 12.8 grams; Nonylphenol polyoxyethylene ether (TX-10) 17.0 grams; Tween-80, 5.2 grams; 3.8 grams of ethanol; 4.9 grams of oleic acid. Add water one by one, stir until completely dissolved, and obtain a transparent viscous aluminum hydroxide filter aid. The product is resistant to temperature -10°C.

[0054] Using the S-11R dehydration filter aid imported from Canada Norandar Company, a 70 mg / L solution was also prepared, and a comparative test was carried out according to the aforementioned method for determining the dehydration rate. The aluminum hydroxide filter aid that present embodiment makes is referred to as filter aid No. 1 in Table 1 and Table 2. The results are shown in Table 1 and Table 2:

[0055] Table 1 Dehydration rate of aluminum hydroxide of Shanxi Luneng Jinbei Aluminum Co., Ltd. (Bayer process)

[0056]

[0057] Table 2 ...

Embodiment 2

[0061] Weigh 30.4 grams of deionized water and place it in a 200 ml beaker, then weigh 36.1 grams of natural carboxylate; AEO-9, 13.1 grams; nonylphenol polyoxyethylene ether (TX-10) 14.0 grams; AEO-12 , 4.4 grams; Tween-60, 5.0 grams; Ethylene glycol 7.0 grams, add one by one in the water of beaker, stir until all dissolving, obtain transparent viscous aluminum hydroxide filter aid (hereinafter referred to as filter aid No. II). The product is temperature-resistant to -25°C.

[0062] Prepare a 70 mg / L solution with filter aid No. II, and carry out according to the aforementioned operation steps for measuring the dehydration rate.

[0063] The S-11R dehydration filter aid imported from Canada Norandar Company was also used to prepare a 70 mg / L solution for a comparative test. The results are shown in Table 3 and Table 4.

[0064] Table 3 Aluminum Hydroxide Dehydration Rate of Shandong Branch of Aluminum Corporation of China (Bayer Process)

[0065]

[0066] Table 4 Dehyd...

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Abstract

The invention relates to an environment-friendly aluminum hydroxide dehydration filter aid, which is obtained by compounding natural carboxylate as the main agent, non-surfactant and co-surfactant, wherein the parts by mass of each component are as follows : 20-35 parts of natural carboxylate, 20-40 parts of non-ionic surfactant, 5-15 parts of co-surfactant, 20-40 parts of water. The raw material of the dehydration filter aid of the present invention is reproducible, low in cost, pollution-free in the use process and low in dosage, and can obviously increase the dehydration rate of aluminum hydroxide.

Description

technical field [0001] The invention relates to an environment-friendly aluminum hydroxide dehydration filter aid, which belongs to the technical field of chemistry. Background technique [0002] Aluminum is indispensable in the national economy. The production process of aluminum is as follows: ① Aluminum comes from bauxite, which reacts with aqueous alkali solution to form aluminum hydroxide. ②Aluminum oxide is generated after burning aluminum hydroxide, and ③metal aluminum is obtained through electrolysis. [0003] Wherein the aluminum hydroxide obtained in the first step contains a lot of lye, so it needs to be cleaned with water. According to literature reports: the aluminum hydroxide obtained by the sintering method after cleaning contains more than 10% moisture; the aluminum hydroxide obtained by the Bayer method contains 6 % above moisture. This hydrated aluminum hydroxide needs to consume heat when burning, part of which is the decomposition of aluminum hydroxide ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22C01F7/44B01D37/02
Inventor 李干佐朱长德曹炳银李辉陈恕勇
Owner JINAN YIYIN TECH & TRADE