Method for recovering vanadium from vanadium precipitation waste water

A vanadium precipitation wastewater and contact reaction technology, applied in the field of vanadium recovery, can solve the problems of long vanadium precipitation time, complicated process, low vanadium precipitation rate, etc., achieve energy saving and cost saving, simple operation, good social and economic benefits Effect

CN105016520AActive Publication Date: 2015-11-04PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2015-11-04

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Abstract

The invention discloses a method for recovering vanadium from vanadium precipitation waste water, which comprises the following steps: 1)adjusting pH value of vanadium precipitation waste water to be acidic; 2)adding C1-C4 alcohol to vanadium precipitation waste water in the step 1), performing a first contact reaction under stirring condition; and 3)adding a surfactant shown in a step 1) to the vanadium precipitation waste water in the step 2), performing a second contact reaction under stirring condition, then performing solid-liquid separation on the product. The method can be characterized in that the surfactant is added for changing the property of the vanadium precipitation waste water, and sediment can be formed by directly combining with vanadium, total vanadium content in vanadium precipitation waste water is reduced from 0.05-5g / L to 0.001-0.005g / L, vanadium precipitation rate can reach more than 99%, the method can be carried out at low temperature in short time, operation is simple, and the method has the advantages of energy consumption saving and cost saving, and has good social benefit and economic benefit. Wherein, R is C10-C18 long chain alkyl, R1-R3 is methyl or ethyl, and X is Cl, Br or I.
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Description

technical field

[0001] The invention relates to a method for recovering vanadium from vanadium precipitation wastewater. Background technique

[0002] As the country pays more and more attention to environmental protection issues, the requirements for pollution control of industrial enterprises are getting higher and higher, and the problem of substandard discharge of vanadium precipitation wastewater is also more and more concerned by the vanadium metallurgy industry. There are more than 10 methods for treating vanadium-chromium-containing wastewater in China, among which the ferrous sulfate reduction-lime neutralization method is widely used in production and has a better effect. The large amount of slag and the slow settling speed make the solid-liquid separation process have a large processing capacity, resulting in a low comprehensive ability of this method to treat vanadium precipitation wastewater. Therefore, how to further improve the treatment capacity of vanadium ...

Examples

Embodiment 1

[0033] This embodiment is used to illustrate the method for recovering vanadium from vanadium precipitation wastewater provided by the present invention.

[0034] In the clean beaker of 2000mL, add 1000mL pH shown in table 1 to be the vanadium deposition waste water of 3.0, be 0.5:1 to add ethanol according to the mol ratio of vanadium in ethanol and vanadium deposition waste water, stir at normal temperature and carry out the first contact reaction, reaction After 5 minutes, add the above solution according to the mass ratio of cetyltrimethylammonium chloride and vanadium in the vanadium precipitation wastewater of 0.05:1, stir at normal temperature to carry out the second contact reaction, after reacting for 5 minutes, filter to obtain low vanadium waste water.

[0035]After testing, the vanadium content in the obtained low-vanadium wastewater is 0.003g / L, and the vanadium deposition rate is 99.41%.

Embodiment 2

[0037] This embodiment is used to illustrate the method for recovering vanadium from vanadium precipitation wastewater provided by the present invention.

[0038] In the clean beaker of 2000mL, add 1000mL pH shown in table 1 to be the vanadium precipitation waste water of 3.0, be 0.05:1 to add ethanol according to the mol ratio of ethanol and vanadium in the vanadium precipitation waste water, stir at normal temperature and carry out the first contact reaction, reaction After 10min, add the above solution according to the mass ratio of dodecyltrimethylammonium chloride and vanadium in the vanadium precipitation wastewater of 0.5:1, stir at normal temperature to carry out the second contact reaction, react after 10min, filter to obtain low vanadium waste water.

[0039] After testing, the vanadium content in the obtained low-vanadium wastewater is 0.005g / L, and the vanadium deposition rate is 99.01%.

Embodiment 3

[0041] This embodiment is used to illustrate the method for recovering vanadium from vanadium precipitation wastewater provided by the present invention.

[0042] In the clean beaker of 2000mL, add the vanadium deposition waste water shown in 1000mL table 1, use sulfuric acid or sodium hydroxide to regulate the pH of vanadium deposition waste water to be 2.5, be 0.1:1 to add ethanol according to the mol ratio of vanadium in ethanol and vanadium deposition waste water, Stir at 20°C to carry out the first contact reaction. After 1 minute of reaction, add the above solution according to the mass ratio of octadecyltrimethylammonium chloride to vanadium in the vanadium precipitation wastewater is 0.5:1, and stir at room temperature to carry out the second contact reaction. Contact reaction, after 1 minute of reaction, filter to obtain low-vanadium wastewater.

[0043] After testing, the vanadium content in the obtained low-vanadium wastewater is 0.002g / L, and the vanadium depositio...