Method of preparing aluminum citrate by clay mine

A technology of aluminum citrate and clay ore, applied in carboxylate preparation, organic chemistry, etc., can solve the problems of low income, large environmental pollution, high cost of alumina, etc., and achieve the effect of promoting dissolution and increasing hydrolysis rate

Inactive Publication Date: 2007-10-24
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the Bayer process requires the A / S of the raw material to be greater than 8
The sintering method does not require high aluminum-silicon ratio, but the sintering process is relatively complicated and energy consumption is high
Most of the clay ore is high in silicon, high in aluminum, and low in aluminum-silicon ratio. Using Bayer method or sintering method or combined method or physical and chemical mineral processing method to process alumina production has high cost, long cycle, low income, difficult to handle residue, and environmental pollution. Big

Method used

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  • Method of preparing aluminum citrate by clay mine
  • Method of preparing aluminum citrate by clay mine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] After crushing and ball milling, the 1# ore sample has a particle size of less than 74 μm. It is placed in a muffle furnace and roasted at 625°C for 3 hours. It is leached with a citric acid solution with a mass concentration of 6%. 10%, the treatment time is 6 hours, four stages of continuous leaching, and the leaching slag of the previous stage is used as the leaching ore sample of the latter stage. After each stage of leaching is completed, filter while hot. The slag after four stages of leaching was taken to analyze the content of Al2O3, SiO2 and Fe2O3. The crude filtrate was placed at room temperature for 12 hours, a large amount of white precipitate was formed, and microfiltration was performed to purify the precipitate. The microfiltrate is returned to the leaching section for recycling.

[0026] chemical composition

Embodiment 2

[0028]Will 2 # After crushing and ball milling, the ore sample has a particle size of less than 165 μm. It is placed in a muffle furnace and roasted at 575°C for 2.5 hours. The time is 4 hours, and three stages are continuously leached, and the leached slag of the former stage is used as the leached ore sample of the latter stage. After each stage of leaching is completed, filter while hot. The slag after two stages of leaching was taken to analyze the content of Al2O3, SiO2 and Fe2O3. The crude filtrate was placed at room temperature for 12 hours, a large amount of white precipitate was formed, and microfiltration was performed to purify the precipitate. The microfiltrate is returned to the leaching section for recycling.

[0029] chemical composition

Embodiment 3

[0031] Will 3 # After crushing and ball milling, the ore sample has a particle size of less than 110 μm. It is placed in a muffle furnace and roasted at 675°C for 3.5 hours. It is leached with a citric acid solution with a mass concentration of 4%. The stirring intensity is 300r / min, the pulp concentration is 10%, and the processing time is For 5 hours, three sections were continuously leached, and the leaching slag of the previous section was used as the leaching ore sample of the latter section. After each stage of leaching is completed, filter while hot. The slag after three stages of leaching was taken to analyze the content of Al2O3, SiO2 and Fe2O3. The crude filtrate was placed at room temperature for 12 hours, a large amount of white precipitate was formed, and microfiltration was performed to purify the precipitate. The microfiltrate is returned to the leaching section for recycling.

[0032] chemical composition

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Abstract

The invention discloses a manufacturing method of aluminium citrate through clay ore, which comprises the following steps: grinding the clay ore; balling; sintering; immersing through citrate; removing slag; stewing; sedimenting; evolving; filtering; obtaining the product.

Description

technical field [0001] The method for producing aluminum citrate by utilizing clay ore relates to an aluminum citrate production method, in particular to a method for directly utilizing low-grade aluminum-containing non-bauxite resource clay ore to produce aluminum citrate. Background technique [0002] In addition to being used as a pretreatment agent for chrysotile and a specific drug for treating silicosis, aluminum citrate is mainly used as an oilfield additive. With the end of the era of primary and secondary oil recovery, the plugging performance of oilfield formations continues to decline, resulting in lower and lower oil production rates. It is difficult to achieve high recovery rates with pure water flooding and polymer flooding. Therefore, in tertiary oil recovery, an additive is added to make it gel with the polymer to increase the residual resistance coefficient. The most widely used polymer is partially hydrolyzed polyacrylamide, and the main additive is alumin...

Claims

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Application Information

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IPC IPC(8): C07C59/265C07C51/41
Inventor 曹慧君周吉奎李旺兴李军亮
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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