Method and application for preparing titanium polysilicate flocculating agent by utilizing pickling waste liquor of cold-rolled titanium plates

A technology for pickling waste liquid and titanium polysilicate, which is applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water pollutants, etc., and can solve the problems of poor flocculation effect of flocculants, difficult treatment, and toxicity. , to achieve the effect of high turbidity removal rate, lower preparation cost and obvious effect

Active Publication Date: 2018-07-31
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the problems that the existing cold-rolled titanium plate pickling waste liquid is not easy to handle and the existing flocculant has poor flocculation effect and is toxic, the present invention provides a method for preparing polysilicate titanium flocculant by using the cold-rolled titanium plate pickling waste liquid Method and application, the synthesis method of the polysilicate titanium flocculant of the present invention is simple and fast, does not need to add additional pure substances such as titanium salt to introduce Ti 4+ , and it can be prepared at normal temperature, and the preparation conditions are mild; and the present invention utilizes the Ti in the pickling waste liquid of cold-rolled titanium plate to the greatest extent 4+ At the same time, the acidity of titanium-containing waste liquid also improves the stability of activated silicic acid. The polysilicate titanium flocculant prepared by the invention is non-toxic, the flocs formed are large, and the sweeping effect is strong, and the turbidity removal effect when treating simulated river water Good and does not increase the color of the water

Method used

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  • Method and application for preparing titanium polysilicate flocculating agent by utilizing pickling waste liquor of cold-rolled titanium plates
  • Method and application for preparing titanium polysilicate flocculating agent by utilizing pickling waste liquor of cold-rolled titanium plates
  • Method and application for preparing titanium polysilicate flocculating agent by utilizing pickling waste liquor of cold-rolled titanium plates

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Embodiment 1

[0024] Embodiment 1: A kind of method that utilizes cold-rolled titanium plate pickling waste liquor to prepare polysilicate titanium flocculant, concrete steps are as follows:

[0025] (1) Na 2 SiO 3 Dissolved in deionized water to make Na 2 SiO 3 solution; where Na 2 SiO 3 The mass fraction of silicon dioxide in the solution is 5.35%;

[0026] (2) Add the stabilizer (the stabilizer is acetic acid) to the dilute sulfuric acid solution and mix evenly to obtain the stabilizer-sulfuric acid solution; the mass percentage concentration of the dilute sulfuric acid solution is 15.0%, and the stabilizer (acetic acid) in the stabilizer-sulfuric acid solution The mass percentage concentration is 3.3%;

[0027] (3) Add the stabilizer-sulfuric acid solution obtained in step (2) dropwise to the Na obtained in step (1) 2 SiO 3 Solution, activated at room temperature and a stirring speed of 400 r / min for 4 hours to obtain a polysilicic acid solution; wherein the stabilizer-sulfuric ...

Embodiment 2

[0032] Embodiment 2: A kind of method that utilizes cold-rolled titanium plate pickling waste liquor to prepare polysilicate titanium flocculant, concrete steps are as follows:

[0033] (1) Na 2 SiO 3 Dissolved in deionized water to make Na 2 SiO 3 solution; where Na 2 SiO 3 The mass fraction of silicon dioxide in the solution is 1.95%;

[0034] (2) Add the stabilizer (the stabilizer is acetic acid) to the dilute sulfuric acid solution and mix evenly to obtain the stabilizer-sulfuric acid solution; the mass percentage concentration of the dilute sulfuric acid solution is 30.0%, and the stabilizer (acetic acid) in the stabilizer-sulfuric acid solution The mass percentage concentration is 1.3%;

[0035] (3) Add the stabilizer-sulfuric acid solution obtained in step (2) dropwise to the Na obtained in step (1) 2 SiO 3 Solution, activated at room temperature and a stirring speed of 200 r / min for 1 h to obtain a polysilicate solution; wherein the stabilizer-sulfuric acid sol...

Embodiment 3

[0040] Embodiment 3: A kind of method that utilizes cold-rolled titanium plate pickling waste liquor to prepare polysilicate titanium flocculant, concrete steps are as follows:

[0041] (1) Na 2 SiO 3 Dissolved in deionized water to make Na 2 SiO 3 solution; where Na 2 SiO 3 The mass fraction of silicon dioxide in the solution is 3.95%;

[0042] (2) Add the stabilizer (the stabilizer is acetic acid) to the dilute sulfuric acid solution and mix evenly to obtain the stabilizer-sulfuric acid solution; the mass percentage concentration of the dilute sulfuric acid solution is 20.0%, and the stabilizer (acetic acid) in the stabilizer-sulfuric acid solution The mass percentage concentration is 4.6%;

[0043] (3) Add the stabilizer-sulfuric acid solution obtained in step (2) dropwise to the Na obtained in step (1) 2 SiO 3 solution, at room temperature, the stirring speed is 300 r / min under the conditions of activation reaction 2h to obtain polysilicic acid solution; wherein th...

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Abstract

The invention discloses a method and an application for preparing a titanium polysilicate flocculating agent by utilizing a pickling waste liquor of cold-rolled titanium plates, and belongs to the fields of environmental science and safety science. The method comprises the following steps: dissolving Na2SiO3 in deionized water to prepare a Na2SiO3 solution; adding a stabilizer into a dilute sulfuric acid solution, uniformly carrying out mixing to obtain a stabilizer-sulfuric acid solution; dropwise adding the Na2SiO3 solution to the stabilizer-sulfuric acid solution, carrying out a reaction for 1-5 hours during stirring at a room temperature to obtain a polysilicic acid solution; adding the polysilicic acid solution into a pickling waste liquor of cold-rolled titanium plates, carrying outa reaction for 0.1 -3 hours during stirring at a room temperature to obtain the titanium polysilicate flocculating agent. The titanium polysilicate flocculating agent prepared by the method can effectively trap and settle suspended matter in a simulative river, can quickly and efficiently purify a water body, and can also be used for removing chromium of electroplating wastewater and removing nitrogen, phosphorus and chemical oxygen demand (COD) of organic wastewater.

Description

technical field [0001] The invention relates to a method and application for preparing a polysilicate titanium flocculant by using waste pickling liquid of a cold-rolled titanium plate, and belongs to the technical field of material synthesis and energy. Background technique [0002] Flocculation and sedimentation is a pretreatment method widely used in water treatment. The flocculant used in the early stage is activated silicic acid, which can produce adsorption bridging and net trapping and sweeping effects to adsorb destabilized micro colloidal particles, and finally gather into a net-like floc. The colloidal particles in a part of the water are swept by the coil to settle together, thereby purifying the water. But it has disadvantages such as easy to freeze and difficult to add. [0003] Cold-rolled titanium plate pickling waste liquid is highly acidic, Ti 4+ If the content is high, if it is discharged directly without treatment, it will pollute the environment and ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F101/16C02F101/22C02F101/30
CPCC02F1/5236C02F2101/16C02F2101/22C02F2101/30
Inventor 李雪张英杰许斌黄雪松王少鹏董鹏徐明丽林艳
Owner KUNMING UNIV OF SCI & TECH
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