Preparation method of enhanced aluminum calcium chloride crystal

A calcium aluminum chloride, enhanced technology, used in chemical instruments and methods, water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. It can solve the problems of high property and other problems, so as to achieve the effects of non-toxicity in the preparation process, environmental protection in the preparation process, and improvement of the purification effect.

Active Publication Date: 2017-05-31
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] 1. The commonly used flocculant aluminum sulfate reacts with water to form flocs of aluminum hydroxide, but it may leave aluminum residues in the finished water, and aluminum may be toxic to humans at high concentrations
[0013] 2. Polyaluminum chloride is one of the most widely used flocculants at present. Although the flocculation effect is very good, its dehydration is not very good in the subsequent sludge treatment process due to the presence of aluminum hydroxide in the sludge.
[0014] 3. Ferric chloride is also used as another commonly used flocculant, which can function in a larger pH range than aluminum sulfate, but is not effective for many source waters, and this iron compound flocculation usually remains in the finished water. iron residues, which cause a slight odor to the water and possible brown stains on porcelain equipment; in addition, ferric chloride presents a risk of corrosion in water treatment systems
The weak point o

Method used

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  • Preparation method of enhanced aluminum calcium chloride crystal
  • Preparation method of enhanced aluminum calcium chloride crystal
  • Preparation method of enhanced aluminum calcium chloride crystal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Example 1, preparing reinforced aluminum calcium chloride crystals containing 23% of magnesium hydroxide, 7.3% of calcium carbonate and 69.7% of aluminum calcium chloride in the multiphase crystal.

[0059] The first step is to prepare magnesium ion aqueous solution.

[0060] 1.1) 3.8 grams of MgCl 2 Dissolve it in 500ml deionized water to prepare a magnesium ion aqueous solution with a concentration of 0.08mol / L, and use a stainless steel vessel to hold the solution;

[0061] 1.2) filter to remove impurities in the magnesium ion aqueous solution:

[0062] 1.21) Put the funnel on the instrument support, put the clean beaker under the funnel, and fold the filter paper on the funnel;

[0063] 1.22) Pour the magnesium ion aqueous solution on the filter paper at a speed of 55 ml / min to obtain the magnesium ion aqueous solution after removing impurities.

[0064] The second step is to prepare aluminum ion aqueous solution.

[0065] 2.1) 31.4 grams of AlCl 3 ·6H 2 Disso...

Embodiment 2

[0091] Example 2, preparing reinforced calcium aluminum chloride crystals containing 28.9% of magnesium hydroxide, 53.4% ​​of calcium aluminum chloride and 17.7% of calcium carbonate in the multi-phase crystal.

[0092] Step 1, preparing magnesium ion aqueous solution.

[0093] 1a) 10.7 grams of MgCl 2 Dissolve it in 500ml deionized water to prepare a magnesium ion aqueous solution with a concentration of 0.226mol / L, and use a stainless steel vessel to hold the solution;

[0094] 1b) filter to remove impurities in the magnesium ion aqueous solution:

[0095] The specific implementation of this step is the same as step 1.2) of Embodiment 1.

[0096] Step 2, prepare aluminum ion aqueous solution.

[0097] 2a) 49.13 grams of AlCl 3 ·6H 2 O was dissolved in 500ml deionized water to prepare an aluminum ion aqueous solution with a concentration of 0.407mol / L, and the solution was contained in a stainless steel vessel;

[0098] 2b) filter to remove impurities in the aluminum io...

Embodiment 3

[0121] Example 3, preparation of reinforced aluminum calcium chloride crystals containing 25.1% magnesium hydroxide, 60.8% aluminum calcium chloride and 14.1% calcium carbonate in the multiphase crystal.

[0122] Step A, preparing magnesium ion aqueous solution.

[0123] A1) 38.95 grams of MgCl 2 Dissolve it in 500ml deionized water to prepare a magnesium ion aqueous solution with a concentration of 0.82mol / L, and use a stainless steel container to hold the solution;

[0124] A2) filter to remove impurities in the magnesium ion aqueous solution:

[0125] The specific implementation of this step is the same as step 1.2) of Embodiment 1.

[0126] Step B, prepare aluminum ion aqueous solution.

[0127] B1) 67.62 grams of AlCl 3 ·6H 2 O was dissolved in 500ml deionized water to prepare an aluminum ion aqueous solution with a concentration of 0.56mol / L, and the solution was contained in a stainless steel container;

[0128] B2) filter to remove impurities in the aluminum ion ...

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Abstract

The invention provides a preparation method of an enhanced aluminum calcium chloride crystal, which mainly solves the problems of special raw material requirements, high possibility of radiation pollution and poor water purification effect in flocculant preparation in the prior art. The method comprises the steps of: 1) preparing a magnesium ion aqueous solution, an aluminum ion aqueous solution, a calcium ion aqueous solution, a hydroxide ion aqueous solution, a surfactant aqueous solution and a sodium carbonate suspension, 2) mixing, heating and stirring the aluminum ion aqueous solution, the calcium ion aqueous solution, the hydroxide ion aqueous solution and the surfactant aqueous solution to prepare a multiphase aluminum calcium chloride suspension, 3) controlling pH (potential of hydrogen) of a reaction solution, mixing, heating and stirring the magnesium ion aqueous solution, the sodium carbonate suspension and the multiphase aluminum calcium chloride suspension to prepare an enhanced multiphase aluminum calcium chloride suspension, performing room temperature standing on the suspension, obtaining a precipitate of the suspension, and drying the precipitate to form the enhanced aluminum calcium chloride crystal. The method is simple in technology, nontoxic, environmentally friendly and low in cost; and the prepared material contributes to improving purification quality of sewage and can be used for water purification treatment.

Description

technical field [0001] The invention belongs to the technical field of chemical materials, and particularly relates to calcium aluminum chloride crystals, which can be used for purification of sewage and sludge in environmental protection, as well as industrial waste water, drinking water, urban waste water, and waste water from breweries or other beverage industries. Purification treatment of waste water, or the removal of harmful substances before the discharge of waste water and sewage in the paper industry. Background technique [0002] "Water purification" treatment refers to the removal of harmful and other compounds that are not tolerated in water. [0003] "Water purification" is of great significance. Taking iron and steel enterprises as an example, blast furnace gas washing water is one of the main wastewater of iron and steel enterprises. It has the characteristics of large water volume, high water temperature, and high content of suspended solids. The water qual...

Claims

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Application Information

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IPC IPC(8): C02F1/52
CPCC02F1/5245
Inventor 任庆利罗强崔彬姜海青智艳陈华施建章
Owner XIDIAN UNIV
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