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Method for preparing iron-titanium-vanadium ternary inorganic polymeric flocculant based on sulfuric acid acidolysis vanadium titano-magnetite two-step method

A technology of vanadium-titanium magnetite and inorganic polymers, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water treatment parameter control, etc., can solve problems such as high temperature and insufficient stability

Active Publication Date: 2021-07-06
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the relevant process of directly preparing flocculant with vanadium-titanium magnetite as raw material is relatively complicated, requires high temperature and is not stable enough (as the existing patent document with publication number CN105217755A), so a kind of vanadium-titanium magnetite is developed as raw material. , the preparation process of flocculant with stable reaction, simple and fast, easy to control and no high temperature is necessary

Method used

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  • Method for preparing iron-titanium-vanadium ternary inorganic polymeric flocculant based on sulfuric acid acidolysis vanadium titano-magnetite two-step method
  • Method for preparing iron-titanium-vanadium ternary inorganic polymeric flocculant based on sulfuric acid acidolysis vanadium titano-magnetite two-step method
  • Method for preparing iron-titanium-vanadium ternary inorganic polymeric flocculant based on sulfuric acid acidolysis vanadium titano-magnetite two-step method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0035] As a preferred embodiment of the present invention, the preparation steps of the iron-titanium-vanadium ternary inorganic polymer flocculant are as follows:

[0036] (1) Dry the vanadium-titanium-magnetite concentrate, grind it into powder, and dry it in an oven at 60°C until it reaches a constant weight.

[0037] (2) The first step reactor is placed in a constant temperature oil bath, and the temperature is controlled under magnetic stirring to carry out the acidolysis reaction. The initial concentration of sulfuric acid is set to 80%, the liquid-solid ratio is 10:1, and the acidolysis temperature is 80 ° C. Stir Rotate at 100 rpm, react until the liquid is completely volatilized, and the remaining solid is off-white.

[0038] (3) In the second step, water is added to the reactor for leaching, the liquid-solid ratio is 2:1, the leaching temperature is 80°C, and the leaching is continued for 1.5h under magnetic stirring at a speed of 100rpm.

[0039] (4) After the leac...

Embodiment 3

[0051] Applications:

[0052] In the first step, weigh 1g of tetracycline and dissolve it in deionized water, dissolve it with ultrasonic stirring, and dilute to 1L to obtain a 1g / L tetracycline standard stock solution; dilute the 1g / L tetracycline standard stock solution to 50mg / L as a tetracycline simulation Sewage samples: by accurately pipetting a series of 1g / L tetracycline standard stock solutions and diluting them into tetracycline sewage samples with different concentration gradients.

[0053] Add 200mL of tetracycline simulated sewage samples to six beakers respectively, stir rapidly at 200r / min for 30s, add the coagulant prepared in Example 1, continue to stir rapidly for 1min, change the stirring speed to 40r / min, and after 15min, let stand After 30 minutes, water samples were taken at 2cm below the liquid surface to measure relevant water quality indicators.

[0054] The effect of iron-titanium-vanadium ternary inorganic polymer flocculant to treat tetracycline si...

Embodiment 4

[0059] Applications:

[0060] Weigh 1.0 g of waste lubricating oil into a beaker and add corresponding water, add 100 μL of surfactant, stir with magnetic force for 2 hours, and set the volume to 1 L to obtain 1000 mg / L simulated oily wastewater.

[0061] Add 200mL of simulated oily waste water to six beakers respectively, stir rapidly at 200r / min for 30s, add the coagulant prepared in Example 1, continue to stir rapidly for 1min, change the stirring speed to 40r / min, and let it stand for 30min after continuing for 15min. Water samples were taken 2cm below the liquid surface to determine relevant water quality indicators.

[0062] The effect of iron-titanium-vanadium ternary inorganic polymer flocculant to treat simulated oily wastewater is as follows:

[0063] Table 3. Simulated oily wastewater treatment effect

[0064]

[0065] As shown by the above application examples, the iron-titanium-vanadium ternary inorganic polymer flocculant prepared by the present invention ha...

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Abstract

The invention discloses a method for preparing an iron-titanium-vanadium ternary inorganic polymeric flocculant based on a sulfuric acid acidolysis vanadium titano-magnetite two-step method, and belongs to the technical field of inorganic flocculant preparation. The method comprises the following steps: drying the vanadium titano-magnetite serving as a raw material, conducting grinding to form powder, putting the powder into a three-neck flask reactor, adding sulfuric acid to carry out acidolysis reaction, controlling the reaction temperature, the concentration of the sulfuric acid and the liquid-solid ratio, conducting reacting until liquid is completely volatilized, after the residual solid is off-white, and adding pure water with different volumes to carry out leaching under conditions of controlled leaching temperature and controlled leaching time, wherein the whole extraction process is carried out under normal pressure under magnetic stirring; and after the extraction reaction is completed, taking out the leachate in the reactor, carrying out suction filtration, adding sodium hydroxide with different volumes and specific concentrations for alkalization, further conducting aging, conducting storing in a glass container, and conducting storing at normal temperature. The method is stable in reaction, simple, rapid, easy to control and free of high temperature, the obtained inorganic polymeric flocculant is good in stability, the removal effect on organic matter is better than that of conventional aluminum and iron flocculants, cost is low, and the method has a certain application prospect in the area where vanadium titano-magnetite is convenient to transport.

Description

technical field [0001] The invention belongs to the technical field of inorganic flocculants, and in particular relates to a method for preparing an iron-titanium-vanadium ternary inorganic macromolecular flocculant based on a two-step method of acidolysis of vanadium-titanium magnetite with sulfuric acid. Background technique [0002] Vanadium-titanium magnetite is a typical metal-associated iron ore resource, not only an important source of iron, but also associated with various components such as vanadium and titanium. my country's reserves of vanadium-titanium magnetite resources exceed 10 billion tons, ranking third in the world, and are mainly distributed in Sichuan and Hebei. Among them, Sichuan's proven reserves are 9.3933 billion tons, accounting for 1% of the world's vanadium-titanium magnetite reserves. / 4. Based on the abundant reserves of vanadium-titanium magnetite in Sichuan and the convenient transportation conditions nearby, the cost of mining and surroundin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F101/30
CPCC02F1/5236C02F1/5245C02F2101/30C02F2209/20C02F2209/11C02F2209/06
Inventor 聂煜东耿媛媛张贤明颜海燕李金申粤
Owner CHONGQING UNIV OF TECH
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