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Preparation method of polymerizing zirconium tetrachloride type inorganic macromolecular coagulant and application thereof

An inorganic polymer, zirconium tetrachloride technology, applied in chemical instruments and methods, zirconium halide, flocculation/sedimentation water/sewage treatment, etc., can solve the problems of low coagulation effluent, affecting effluent utilization and further treatment, etc.

Inactive Publication Date: 2017-09-12
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the zirconium tetrachloride solution itself is strongly acidic, and zirconium tetrachloride is used as a coagulant, and a large amount of H will be released due to hydrolysis during the hydrolysis process. + , these factors lead to the low pH of the coagulation effluent, which seriously affects the subsequent utilization and further treatment of the effluent

Method used

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  • Preparation method of polymerizing zirconium tetrachloride type inorganic macromolecular coagulant and application thereof
  • Preparation method of polymerizing zirconium tetrachloride type inorganic macromolecular coagulant and application thereof
  • Preparation method of polymerizing zirconium tetrachloride type inorganic macromolecular coagulant and application thereof

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preparation example Construction

[0020] First aspect of the present invention is to provide a kind of preparation method of polymerized zirconium tetrachloride inorganic polymer coagulant, described method comprises steps as follows:

[0021] (1) Use deionized water to prepare ZrCl with a concentration of 10%-20% (w / v) (corresponding to a concentration of 111.11-222.22g / L) 4 the solution

[0022] (2) ZrCl 4 Place the solution in an ice-water bath, and slowly add the concentrated alkali solution with a concentration of 80-200g / L to the ZrCl 4 In the solution, continue to stir for 3-5h after the dropwise addition; wherein the concentrated alkali solution and ZrCl 4 The dosage ratio range of the solution is greater than 0-2.5.

[0023] (3) The dripping process of the above-mentioned step (2) is according to the difference of alkalization degree, and the dripping time is controlled within 3h, and then continues to stir for 3-5h, and the solution obtained is all transparent and clear and there is no visible pre...

preparation Embodiment 1

[0045] Weigh ZrCl 4 Powder (Woke, XW100261161) 11.1111g was quickly added to 50mL ice deionized water under the stirring condition of 500rpm, and after it was dissolved, the ZrCl 4 The solution was transferred to a 100mL volumetric flask, and the ice deionized water was constant to obtain 10wt% ZrCl 4 solution; after that, measure 10wt% of ZrCl 4 Solution 10mL, in the case of vigorous stirring, add 100g / L NaOH solution dropwise through a basic burette, and the dropping volume is 0.3812mL, 0.953mL, 1.906mL, 2.859mL, 3.812mL, 4.765mL, 5.718mL . The dropping times were 10, 20, 40, 80, 120, and 150 minutes, respectively. Continue to stir for 3-5h after the dropwise addition, to obtain the polymerized zirconium tetrachloride inorganic polymer coagulant whose alkalization degree (expressed by B) is 0.2, 0.5, 1.0, 1.5, 2.0, 2.5 respectively, and the prepared product is listed as N1 , N2, N3, N4, N5, N6 said. Electrospray ionization ion-of-flight mass spectrometry (ESI-TOF-MS) wa...

preparation Embodiment 2

[0051] Weigh ZrCl 4 Powder (Wokai, XW100261161) 5.5556g, under the stirring condition of 500rpm, quickly add into 25mL ice deionized water, after it dissolves, ZrCl 4 The solution was transferred to a 50mL volumetric flask, and the ice deionized water was constant to obtain 10wt% ZrCl 4 solution; after that, measure 10wt% of ZrCl 4 Solution 5mL, in the case of vigorous stirring, dropwise add 100g / L KOH solution through the alkaline burette, the drop volume is 0.2669mL, 0.667mL, 1.334mL, 2.002mL, 2.669mL, 3.336mL, 4.003mL . The dropping times were 10, 20, 40, 80, 120, and 150 minutes, respectively. Continue to stir for 3-5h after the dropwise addition, to obtain the polymerized zirconium tetrachloride inorganic polymer coagulant whose alkalization degree (expressed by B) is 0.2, 0.5, 1.0, 1.5, 2.0, 2.5 respectively, and the prepared product is listed as N1 , N2, N3, N4, N5, N6 said.

[0052] The inorganic macromolecular polymerization coagulant provided by the invention ad...

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Abstract

The invention discloses an inorganic polymer coagulant for water treatment and a preparation method thereof. The inorganic macromolecule coagulant is polymerized zirconium tetrachloride, which uses zirconium tetrachloride and concentrated lye as raw materials, and slowly adds the concentrated lye to the zirconium tetrachloride solution to obtain different suitable alkalization degrees, concentrated alkali The dropwise addition process is controlled to be completed within 3 hours, and then the stirring is continued for 3-5 hours until the solution becomes a colorless and transparent liquid. The inorganic polymer coagulant provided by the invention has the advantages of good product stability, strong adsorption and bridging ability to colloidal substances, good coagulation effect, wide application range, etc., and can be widely used in water supply, wastewater treatment, papermaking, textile printing and dyeing , Daily chemicals and other fields, and has a good water treatment effect. The method of the invention has the characteristics of simple and convenient process, economy, speed and the like.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a preparation method of a polymerized zirconium tetrachloride inorganic polymer coagulant (PZC) and its use as a water treatment agent. Background technique [0002] Iron-based or aluminum-based coagulants are rich in a variety of highly positively charged hydrolysis products. In order to improve the coagulation effect, Al and Fe salts are often pre-hydrolyzed to obtain products such as polyaluminum chloride, polyferric chloride and polyferric sulfate. However, a large amount of aluminum-based coagulants will produce a certain amount of Al residues, which may cause potential harm to human health; the use of iron-based coagulants also has some problems, such as the residual Fe salts in the treated water are highly corrosive . Therefore, it is imperative to prepare new flocculants with high coagulation efficiency. The application of other alternative metal ions, such as ...

Claims

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Application Information

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IPC IPC(8): C01G25/04C02F1/52
CPCC01G25/04C02F1/5236
Inventor 盛国平李娜俞汉青胡怡
Owner UNIV OF SCI & TECH OF CHINA
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