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MCM-41/ferrotitanium-based composite coagulant and preparation method thereof

A MCM-41, coagulant technology, applied in chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem that the practical effect of coagulant is not very ideal, coagulant transportation And the storage is not very convenient, the shelf life is not fixed and other problems, to reduce the residual amount of metal ions, prolong the shelf life, reduce the difficulty of the effect.

Active Publication Date: 2020-10-23
日照远明化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The coagulants produced and used in the prior art, due to their own structural limitations such as the fast hydrolysis of titanium salts, coupled with the complex water environment, the practical effect of the coagulants is often not very ideal
At the same time, the transportation and storage of the existing coagulant is not very convenient; and the shelf life is not fixed, the effect of the coagulant will be weakened after a period of time, and it must be used immediately in order to achieve the best coagulation effect

Method used

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  • MCM-41/ferrotitanium-based composite coagulant and preparation method thereof
  • MCM-41/ferrotitanium-based composite coagulant and preparation method thereof
  • MCM-41/ferrotitanium-based composite coagulant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Step 1: Weigh 10g CTAB and dissolve it in 1300mL deionized water, add 450mL absolute ethanol, mix well, add 135mL ammonia water and stir for 30min; then quickly add 35mL TEOS, stir for 50min and then age statically at 25℃ for 18h; suction filter The precipitate was washed with deionized water until neutral. After drying at 75°C, place it in a muffle furnace at 540°C for calcination for 4 hours, and grind to obtain MCM-41.

[0028] Step 2: 50mL of absolute ethanol and 5ml of acetylacetone are mixed, then 8.1g of anhydrous ferric chloride (FeCl 3 ) was slowly added into it and continuously ultrasonically stirred for 1 h to obtain a mixed solution A. Mix 12g of pure MCM-41, 40ml of absolute ethanol and 15ml of deionized water to obtain solution B.

[0029] Step 3: Put the mixed solution A in a magnetic stirring water bath and stir continuously at a high speed at 60°C, and at the same time add 5.5ml of TiCl 4 Add it dropwise into the mixed solution A at a rate of 2ml / min...

Embodiment 2

[0032] Step 1: Same as Step 1 of Example 1.

[0033] Step 2: 30mL of absolute ethanol and 2.6ml of acetylacetone are mixed, then 4.9g of anhydrous ferric chloride (FeCl 3 ) was slowly added into it and continuously ultrasonically stirred for 1.5h to obtain a mixed solution A. Mix 12g of pure MCM-41, 40ml of absolute ethanol and 15ml of deionized water to obtain solution B.

[0034] Step 3: Put the mixed solution A in a magnetic stirring water bath and stir continuously at a high speed at 60°C, and at the same time add 6.6ml of TiCl 4 Add it dropwise into the mixed solution A at a rate of 2ml / min, and keep stirring for 60 minutes after the dropwise addition to obtain the mixed solution C.

[0035] Step 4: Adjust the temperature of the water bath to 70°C and continue to stir the mixed solution C at high speed, add 1.8g Na to the mixed solution C 2 HPO 4 , continue to stir for 1 h at the same temperature; then lower the temperature of the water bath to 40°C, add solution B drop...

Embodiment 3

[0037] Step 1: Same as Step 1 of Example 1.

[0038] Step 2: 45mL of absolute ethanol and 6ml of acetylacetone are mixed, then 5.3g of anhydrous ferric chloride (FeCl 3 ) was slowly added into it and continuously ultrasonically stirred for 1 h to obtain a mixed solution A. Mix 12g of pure MCM-41, 40ml of absolute ethanol and 15ml of deionized water to obtain solution B.

[0039] Step 3: Put the mixed solution A in a magnetic stirring water bath and stir continuously at a high speed at 60°C, and at the same time add 11ml of TiCl 4 Add it dropwise into the mixed solution A at a rate of 2ml / min, and keep stirring for 40min after the dropwise addition to obtain the mixed solution C.

[0040] Step 4: Adjust the temperature of the water bath to 70°C and continue to stir the mixed solution C at high speed, add 3.2g Na to the mixed solution C 2 HPO 4 , continue to stir for 2 hours at the same temperature; then lower the temperature of the water bath to 43°C, add solution B dropwis...

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Abstract

The invention relates to the technical field of composite material preparation, and especially relates to an MCM-41 / ferrotitanium-based composite coagulant and a preparation method thereof. The preparation method comprises the steps that firstly, ethyl orthosilicate and hexadecyl trimethyl ammonium bromide are used for synthesizing MCM-41; the MCM-41, absolute ethyl alcohol and deionized water aremixed; then TiCl4, Na2HPO4 and the MCM-41-absolute ethyl alcohol-deionized water mixed solution are sequentially added into the absolute ethyl alcohol, acetylacetone and FeCl3 mixed solution to obtain a sol-state substance; and the sol-state substance is aged and ground to obtain the MCM-41 / ferrotitanium-based composite coagulant. The prepared composite coagulant is good in coagulation effect, high in precipitation speed and high in stability in water treatment, and has an excellent actual use effect.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and in particular relates to an MCM-41 / iron-titanium composite coagulant and a preparation method thereof. Background technique [0002] Due to the crisis of water shortage and environmental pollution, sewage treatment is particularly important. Coagulants are water-soluble polymers with low molecular weight and high positive charge density, mostly in liquid state. They are divided into two categories, inorganic and organic. Inorganic coagulants are mainly aluminum, iron salts and their polymers. It is known that when the particle size of suspended particles in water is small to a certain extent, the energy of Brownian motion is enough to prevent the action of gravity, so that the particles do not settle. This suspension can remain stable for a long time. Moreover, the surface of suspended particles is often charged, and it is often the repulsion of the same charge betw...

Claims

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Application Information

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IPC IPC(8): C02F1/52
CPCC02F1/5236Y02W10/37
Inventor 蔡营龙
Owner 日照远明化工有限公司