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Preparation method and application of PCAMT (polymeric aluminium magnesium titanium chloride)

A technology of polyaluminum magnesium chloride and aluminum chloride, which is applied in chemical instruments and methods, water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. The problem of large dosage and other problems can achieve the effect of good turbidity removal and decolorization, good coagulation effect and fast floc settling speed.

Inactive Publication Date: 2018-06-19
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The present invention aims at that when the existing aluminum coagulant is used as a sewage treatment agent, the dosage of the agent is large, the effect of sewage treatment is not obvious, the flocs produced are relatively fragile, and are easily broken when the water body is disturbed, and the sedimentation velocity is small, Residual aluminum poses a great threat to human health. Provide a polyaluminum chloride magnesium titanium (PCAMT) inorganic composite polymer coagulant and its preparation and application, and obtain an inorganic composite polymer coagulation with good coagulation effect agent

Method used

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  • Preparation method and application of PCAMT (polymeric aluminium magnesium titanium chloride)
  • Preparation method and application of PCAMT (polymeric aluminium magnesium titanium chloride)
  • Preparation method and application of PCAMT (polymeric aluminium magnesium titanium chloride)

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preparation example Construction

[0025] A preparation method of polyaluminium-magnesium-titanium chloride, which comprises the following steps:

[0026] (1) Take aluminum chloride hexahydrate and add deionized water to fully stir and dissolve to obtain a colorless transparent solution, prepare an aluminum chloride solution with a concentration of 0.1 to 0.3mol / L, take magnesium chloride hexahydrate and add deionized water to fully stir and dissolve to obtain Colorless and transparent solution, prepared as a magnesium chloride solution with a concentration of 0.05-0.2mol / L;

[0027] (2) According to the molar ratio of Mg / Al being 0.1-0.6:1, mix the aluminum chloride and magnesium chloride solution obtained in step (1) to obtain the aluminum-magnesium chloride solution, which is placed in a refrigerator at a temperature of -20 to 5 Place it at ℃ for 20-30min and take it out. According to the Ti / Al molar ratio of 0.1-0.6:1, pipette 0.11-0.66mL of titanium tetrachloride liquid into the aluminum-magnesium chloride...

Embodiment 1

[0035] (1) Take by weighing 2.4163g aluminum chloride hexahydrate white crystals and 0.6099g magnesium chloride hexahydrate white crystals and dissolve them in 60mL of deionized water, fully stir it to dissolve to obtain a colorless and transparent aluminum magnesium chloride solution;

[0036] (2) Place the obtained colorless and transparent aluminum-magnesium chloride solution in a refrigerator at -10°C for 20 minutes and take it out;

[0037] (3) According to the molar ratio of Ti / Al being 0.3, pipette 0.33 mL of titanium tetrachloride liquid into the aluminum-magnesium chloride solution obtained in step (2) to obtain an aluminum-magnesium-titanium chloride solution.

[0038] (4) According to the molar ratio of n(OH) / n(Al+Mg+Ti) is 0.4, add the sodium hydroxide (NaOH) solution that concentration is 2mol / L to the mixed solution in (3) dropwise, add dropwise After completion, stirring was continued in a constant temperature water bath at 60 °C for 2 h.

[0039] (5) Place the...

Embodiment 2

[0045] (1) Weigh 2.4163g aluminum chloride hexahydrate white crystal and 1.0165g magnesium chloride hexahydrate

[0046] Dissolve the white crystals in 60mL of deionized water, stir well to dissolve to obtain a colorless and transparent aluminum-magnesium chloride solution;

[0047] (2) Place the obtained colorless and transparent aluminum-magnesium chloride solution in a refrigerator at -15°C for 25 minutes and take it out;

[0048] (3) According to the molar ratio of Ti / Al being 0.5, pipette 0.55 mL of titanium tetrachloride liquid into the aluminum-magnesium chloride solution obtained in step (2) to obtain an aluminum-magnesium-titanium chloride solution.

[0049] (4) According to the molar ratio of n(OH) / n(Al+Mg+Ti) is 0.6, add the sodium hydroxide (NaOH) solution that concentration is 2mol / L to the mixed solution in (3) dropwise, add dropwise After completion, stirring was continued in a constant temperature water bath at 60 °C for 2 h.

[0050] (5) Place the aluminum-m...

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Abstract

The invention relates to a preparation method and an application of PCAMT (polymeric aluminium magnesium titanium chloride). The preparation method comprises the following steps: an aluminium chloridesolution and a magnesium chloride solution are prepared and mixed in the mole ratio of Mg / Al being 0.1-0.6:1, an aluminium magnesium chloride solution is obtained, placed in a refrigerator for 20-30min and taken out, 0.11-0.66 mL of a titanium tetrachloride liquid is pipetted to the aluminium magnesium chloride solution in the mole ratio of Ti / Al being 0.1-0.6:1, the mixed solution is sufficiently stirred and uniformly mixed, an aluminium magnesium titanium chloride solution is obtained, a sodium hydroxide solution with concentration being 2 mol / L is added dropwise to the aluminium magnesiumtitanium chloride solution, the mixed solution is stirred and mixed uniformly during addition, thermostatic water bath and continuous stirring are performed after addition, curing is performed in a light avoiding manner at room temperature, and PCAMT is obtained. The process is simple, the cost is low, an obtained composite polymeric coagulant has better charge neutralizing and adsorption bridging effects on pollutants, and the coagulation effect is better.

Description

technical field [0001] The invention relates to a preparation method and application of polyaluminium-magnesium-titanium chloride, belonging to the technical field of water treatment. Background technique [0002] With the rapid development of industry and agriculture and the rapid increase of population, the water resources that human beings depend on for survival are becoming increasingly scarce, and the water resource crisis is becoming more and more serious. At present, water pollution and water shortage are becoming more and more important factors restricting economic development. In order to save water resources, improve water utilization, reduce and eliminate the harm caused by water pollution to human beings and the environment, water treatment must be strengthened. Coagulation technology is the most commonly used treatment technology unit in water pollution control, water purification treatment, sewage (waste) water advanced treatment and reuse, and sludge dehydrat...

Claims

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Application Information

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IPC IPC(8): C02F1/52
CPCC02F1/5236
Inventor 张鹏赵冬琴张艳君
Owner HUNAN UNIV OF SCI & TECH
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