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Method for preparing solid polymeric aluminum ferric sulfate by use of bauxite oxide

A technology of solid polymerization and ferric aluminum sulfate, which is applied in the direction of ferric sulfate, etc., can solve the problems of increasing the complexity of the preparation process of solid polymer ferric aluminum sulfate, the inability to be widely used in industry, and the failure to meet the processing requirements, so as to facilitate industrial production and facilitate Transportation and storage, low cost effect

Active Publication Date: 2014-05-21
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional preparation process of polyaluminium-ferric sulfate mostly uses industrial-grade green vitriol or a combination of iron and aluminum-containing materials as raw materials, which has high requirements for raw materials and stricter process conditions. Secondly, most of the finished products are in liquid state, which is not easy to store and transport. It is very prominent that a small number of solid polyaluminum ferric sulfate is also made from liquid polyaluminum ferric sulfate after drying under specific conditions, which greatly increases the complexity of the solid state polyaluminum ferric sulfate preparation process
As aluminum ore, the aluminum content of high-iron and low-alumina bauxite is less than 40%, and the grade is low, which cannot meet the processing requirements of the current aluminum industry. Therefore, it cannot be widely used in industry at present.

Method used

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  • Method for preparing solid polymeric aluminum ferric sulfate by use of bauxite oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The method of utilizing alumina ore of the present invention to prepare solid polyaluminum ferric sulfate comprises the following steps:

[0029] Step 1, after crushing the alumina ore through a 200-mesh sieve;

[0030] Step 2, roasting in a muffle furnace at a temperature of 500°C for about 60 minutes, and then roasting at 800°C for 1 hour;

[0031] Step 3: Put 20 g of the calcined alumina into a reaction kettle with a temperature of 80°C and a pressure of 5 atm, and add 11 mol / L of sulfuric acid in a jet flow according to the solid-to-liquid ratio of 1.6:1. The atomized particle size is 5000μm; after stirring evenly, add 9mol / L sulfuric acid, the atomized particle size is 3000μm; after stirring evenly, add 8mol / L sulfuric acid, the atomized particle size is 2000μm; 60min;

[0032] Step 4: Add in sequence a stabilizer with a P / [Fe+Al] of 0.08 such as phosphoric acid, a small amount of an oxidant such as hydrogen peroxide, and an alkalizing agent with a [OH] / [Fe+Al] o...

Embodiment 2

[0035] Step 1, crushing alumina ore through a 120-mesh sieve;

[0036] Step 2: Baking in a muffle furnace at 400°C for about 30 minutes, and then firing at 800°C for about 1 hour,

[0037] Step 3: Put 20g of the calcined alumina into a reaction kettle with a temperature of 80°C and a pressure of 3atm, and add 10mol / L sulfuric acid in a jet flow according to the liquid-solid ratio of 1.4:1. The atomized particle size is 3000μm; after stirring evenly, add 8mol / L sulfuric acid, the atomized particle size is 2000μm; after stirring evenly, add 7mol / L sulfuric acid, the atomized particle size is 1500μm; fully stir and heat the acid solution 60min,

[0038] Step 4: Add in sequence a stabilizer with a P / [Fe+Al] of 0.1 such as phosphoric acid, a small amount of an oxidant such as hydrogen peroxide and an alkalizing agent with a [OH] / [Fe+Al] of 1.0 such as sodium hydroxide and stir for 40 minutes to hydrolyze and polymerize, then stop Heating out;

[0039] Step 5, aging for 36 hours ...

Embodiment 3

[0041] The method of utilizing alumina ore of the present invention to prepare solid polyaluminum ferric sulfate comprises the following steps:

[0042] Step 1, after crushing the alumina ore through a 100-mesh sieve;

[0043] Step 2, roasting in a muffle furnace at a temperature of 800°C for about 60 minutes;

[0044]Step 3. Put 20g of roasted alumina into a reaction kettle with a temperature of 120°C and a pressure of 2atm, and add 10mol / L sulfuric acid in a jet flow according to a solid-to-liquid ratio of 1.4:1; fully stir Then heat and dissolve in acid for 40 minutes;

[0045] Step 4: Add in sequence a stabilizer with a P / [Fe+Al] of 0.09, a small amount of oxidant and an alkalizing agent with a [OH] / [Fe+Al] of 1.6, stir for 30 minutes, stop heating and take out;

[0046] Step 5, aging for about 40 hours to obtain a light yellow viscous solid product.

[0047] The product performance table of the described solid polyaluminum ferric sulfate prepared by the method for prep...

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Abstract

The invention provides a method for preparing solid polymeric aluminum ferric sulfate by use of bauxite oxide, which comprises the steps of roasting the bauxite oxide; adding sulfuric acid for acid dissolution; adding a stabilizer, a small amount of oxidizing agent and an alkalizer for hydrolysis; curing for 36-48 hours to obtain a light yellow sticky solid product, wherein the roasting temperature is in gradient increase, the sulfuric acid is gradually added in a jet flow manner, and the acid dissolution, hydrolysis and curing are all performed under a pressure of 2-5atm. According to the method provided by the invention, the raw material is single and easily available, the cost is low, the preparation process is simple and easy to operate and facilitates industrial production, a finished product prepared by a one-step process is directly in a solid state, the product is convenient to transport and store, and the popularization and application are facilitated.

Description

technical field [0001] The invention relates to a preparation method of polyaluminum ferric sulfate, in particular to a method for directly preparing solid polyaluminum ferric sulfate by utilizing alumina ore. Background technique [0002] The traditional preparation process of polyaluminium-ferric sulfate mostly uses industrial-grade vitriol or a combination of iron and aluminum-containing materials as raw materials, which has high requirements for raw materials and stricter process conditions, and the second is that most of the finished products are in liquid state, which is not easy to store and transport. It is very prominent that a small number of solid polyaluminum ferric sulfates are also prepared by drying liquid polyaluminum ferric sulfates under specific conditions, which greatly increases the complexity of the solid state polyaluminum ferric sulfate preparation process. As aluminum ore, the aluminum content of high-iron and low-alumina bauxite is lower than 40%, a...

Claims

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Application Information

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IPC IPC(8): C01G49/14
Inventor 吴烈善伍敏莉苏翠翠吴蒙莫小荣
Owner GUANGXI UNIV
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