Application of titanium trichloride and treatment method of rhenium-containing wastewater

A technology of titanium trichloride and treatment method, applied in water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve problems such as unsatisfactory perrhenate removal effect and complicated process , to achieve the effect of good work, simple operation and large size

Active Publication Date: 2021-08-13
LOGISTICAL ENGINEERING UNIVERSITY OF PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a kind of application of titanium trichloride and the treatment method of rhenium-containing wastewater, one of the purposes is to provide a new kind of titanium trichloride Purpose, the second purpose is to solve the problem of unsatisfactory removal of perrhenate and complex process in the existing rhenium-containing wastewater

Method used

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  • Application of titanium trichloride and treatment method of rhenium-containing wastewater
  • Application of titanium trichloride and treatment method of rhenium-containing wastewater
  • Application of titanium trichloride and treatment method of rhenium-containing wastewater

Examples

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Embodiment 1

[0042] A treatment method for rhenium-containing wastewater, comprising the following steps:

[0043] S1. At room temperature, place a 250mL beaker on a programmable coagulation and stirring test machine, and add 200mL of waste water containing ammonium perrhenate, wherein, in the waste water, the concentration of ammonium perrhenate is about 54 μmol / L, high The concentration of rhenate ions is about 10mg / L, then directly add titanium trichloride solution, and add 0.1mol / L sodium hydroxide solution to adjust the pH value of the wastewater to 6.2;

[0044] S2. In the wastewater after pH adjustment, the molar ratio of titanium trichloride to perrhenate ions is 25:1, then start the coagulation test mixer, and stir in two stages, the first stage is at a rate of 250rpm / min Stir for 1min, and stir for 5min at a rate of 40rpm / min in the second stage. Stir in two stages, which can be directly preset on the coagulation test mixer, and then stir according to the preset coagulation progr...

Embodiment 2

[0046] In the present embodiment, the influence of the molar ratio of different titanium trichloride and perrhenate ions on the removal rate of perrhenate ions is studied, specifically including the following steps:

[0047] S1. At room temperature, take five 250mL beakers and place them on the programmable coagulation stirring tester in turn, and add 200mL of waste water containing ammonium perrhenate, wherein the concentration of ammonium perrhenate in the waste water is about 54μmol / L, the concentration of perrhenate ion is about 10mg / L, then directly add titanium trichloride solution, and add 0.1mol / L sodium hydroxide solution to adjust the pH value of wastewater to 6.2;

[0048] S2, in the wastewater after pH adjustment, the molar ratios of titanium trichloride and perrhenate ions are 30:1, 20:1, 15:1, 10:1 or 5:1 respectively, and then start the coagulation test mixer , stirred in two stages, the first stage was stirred at a rate of 250rpm / min for 1min, and the second st...

Embodiment 3

[0050] In this embodiment, in Example 1 and Example 2, under the condition of different molar ratios of titanium trichloride and perrhenate ions, the removal rate of perrhenate in the solution sample at 2 cm from the liquid surface increases with the second Phase changes in coagulation time.

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Abstract

The invention provides an application of titanium trichloride and a treatment method of rhenium-containing wastewater, and relates to the technical field of wastewater treatment. The invention relates to the application of titanium trichloride, in particular to the application of titanium trichloride as a coagulant in wastewater. The rhenium-containing wastewater treatment method comprises the following steps: taking wastewater containing perrhenate ions, adding a titanium trichloride solution, and adding a sodium hydroxide solution to adjust the pH value to 3.2-9.2; and S2, stirring the wastewater of which the pH value is adjusted in two stages, standing for layering after the stirring is finished, and filtering. In the wastewater after the pH value is adjusted, the molar ratio of titanium trichloride to perrhenate ions is (5-30): 1. The invention provides a new application of titanium trichloride, and solves the problems that in the existing rhenium-containing wastewater, the removal effect of perrhenate is not ideal, and the technological process is complex.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to an application of titanium trichloride and a treatment method for rhenium-containing wastewater. Background technique [0002] Titanium trichloride is a dark purple crystal, easy to deliquescence. Commonly used as analytical reagents and reducing agents, polypropylene catalysts, etc. Titanium trichloride is usually prepared by reducing titanium tetrachloride with hydrogen. It can be dissolved in cold water, hot water and HCl, easily soluble in ethanol, insoluble in ether, and can be oxidized to Ti(IV) in air. Moisture can accelerate the oxidation process, so it must be kept in CO 2 atmosphere. [0003] Rhenium is a sparse refractory metal with high melting point, wear resistance, corrosion resistance, stable mechanical properties and other excellent properties. It is widely used in national defense, aerospace, nuclear energy, electronics and chemical industries. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
CPCC02F1/5236C02F2101/006Y02P10/20
Inventor 刘杰周鑫范峻雨白昊川刘于颇
Owner LOGISTICAL ENGINEERING UNIVERSITY OF PLA
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