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Method for preparing iron-free aluminium sulfate and superfine active carbon white utilizing aluminium first-class ore

An iron-free aluminum sulfate and bauxite technology, applied in the direction of aluminum sulfate, aluminum sulfur compounds, silica, etc., can solve the problems of low silica content, large silica particles, high impurity content, etc., and achieve high activity , high functionality, and the effect of reducing production costs

Inactive Publication Date: 2006-10-25
杭州百事特实业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the invention patent of application number CN200510045102.6, aluminum sulfate waste residue is used to produce white carbon black. The white carbon black produced by this process has larger particles, smaller specific surface area, lower activity, lower silica content, and higher impurity content. Little added value

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Preparation of iron-free aluminum sulfate:

[0032] Crush the bauxite into 100g of 80-mesh ore powder, and use a permanent magnetic drum magnetic separator for about 20 minutes to remove the free iron source. 98% concentrated sulfuric acid 100g, the concentration of adding water to dilute sulfuric acid is 55%. Add bauxite powder and 55% sulfuric acid to the reaction kettle, under the pressure of 2.0kgf / cm 2 , and reacted for 6 hours under the condition that the temperature was 180°C. Reduce the pressure in the reactor to normal pressure, add multifunctional dithiocarbamate powder AP-CDS 2.0g at 60°C, perform solid phase reaction for 30 minutes, and filter to obtain 230g of liquid aluminum sulfate. The concentration of aluminum sulfate is 48.5%, the iron content is 12ppm, and the filter residue is 50g.

[0033] Preparation of ultrafine activated silica:

[0034] It was washed once with 50 g of aqueous sodium hydroxide solution with a concentration of 0.2%, 50 g of so...

Embodiment 2

[0036] Crush 100g of bauxite into 50 meshes, and prepare 67g of 98% concentrated sulfuric acid to make 30% sulfuric acid solution, and the reaction pressure is 1.5kgf / cm 2 , The temperature was 140° C. for 10 hours. Replace the polyfunctional dithiocarbamate powder with 1.0 g of NDA-CDS, lower the pressure to normal pressure, add functional dithiocarbamate powder at 0° C. for solid-state reaction for 100 minutes. The dosage of 20% sodium hydroxide aqueous solution is 100 g, and the temperature is 150° C. for 0.5 hour. Other technology prepares iron-free aluminum sulfate and superfine active white carbon black by the same condition of embodiment 1, and the iron content of aluminum sulfate is 11ppm, and the average particle diameter of white carbon black is 3.5um, and the weight of white carbon black is 31g, compares Surface area is 215m 2 / g, the content of silicon dioxide is 92.2%.

Embodiment 3

[0038] Crush 100g of bauxite into 200 meshes. To prepare iron-free aluminum sulfate, 80g of 98% concentrated sulfuric acid is needed to prepare a 75% sulfuric acid solution. The reaction pressure is 3.5kgf / cm 2 , The temperature was 210° C. for 4 hours. Replace the polyfunctional dithiocarbamate powder with 2.0 g of NPA-CDS, drop to normal pressure, add functional dithiocarbamate powder at 100°C for 10 minutes for solid-state reaction. Concentration is that the sodium hydroxide aqueous solution consumption of 30% is changed into 56g, and other technology prepares iron-free aluminum sulfate and superfine active white carbon black by the same condition of embodiment 1, and the iron content of aluminum sulfate is 11ppm, and the average particle size of white carbon black The diameter is 3.8um, the weight of white carbon black is 28g, and the specific surface area is 210m 2 / g, the content of silicon dioxide is 92.0%.

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Abstract

The invention discloses a method for preparing iron-free aluminum sulfate and superfine active white carbon black with bauxite, crushing the bauxite and removing dissociative iron source by magnetic separation, and then reacting with vitriol; adding in dithiocarbamate with medium and high molecular weights and multiple functionalities to remove iron ions by solid phase reaction, and filtering, where the filtrate is iron-free aluminum sulfate; washing filter residue with alkaline water solution, surface active agent water solution, and tap water, respectively, to neutralize it, then after reacting with alkali, filtering, making filtrate, inorganic acid and active particles react mutually, filtering, water-washing, and drying to obtain the superfine active white carbon black. And the method has simple process, and low cost, applied to industrialized production, where the iron content of the prepared aluminum sulfate is less than 15 ppm, and the grain size, specific surface area, tensile strength, added value of the superfine white carbon black are 0.5-5 mum, greater than 200 m2 / g, higher than 17.0 MPa, and high, respectively.

Description

technical field [0001] The invention belongs to the technical field of inorganic materials, and in particular relates to a method for preparing iron-free aluminum sulfate from bauxite and a method for superfine activated white carbon black. Background technique [0002] Aluminum sulfate is an important inorganic salt product. The largest use of aluminum sulfate is in the paper industry. It is mainly used for sizing, adjusting pH value, clarifying water during processing and as a mordant, accounting for about 10% of the total output of aluminum sulfate. 50% of. The second largest use of aluminum sulfate is as a flocculant in drinking water, industrial water and industrial wastewater treatment, accounting for about 40% of the total output of aluminum sulfate. Other uses of aluminum sulfate include mordant for dyeing, purification of fats and oils, cosmeceuticals, fire extinguishing agent, leather tanning, and production of various complex aluminum salts. [0003] Aluminum su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/74C01B33/18
Inventor 张道洪
Owner 杭州百事特实业股份有限公司
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