Adsorption method for separating and extracting vanadium and chrome from solutions after vanadium precipitation

A technology of solid-liquid separation and vanadium precipitation, which is applied in chemical instruments and methods, adsorption water/sewage treatment, and process efficiency improvement, etc. Friendly, easy-to-prepare effect

Inactive Publication Date: 2019-11-08
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the existing research focuses on the removal of V and Cr in the solution, the effective separation, enrichment and recovery of V and Cr are difficult to achieve.

Method used

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  • Adsorption method for separating and extracting vanadium and chrome from solutions after vanadium precipitation
  • Adsorption method for separating and extracting vanadium and chrome from solutions after vanadium precipitation
  • Adsorption method for separating and extracting vanadium and chrome from solutions after vanadium precipitation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1- Embodiment 3

[0041] Preparation of embodiment 1-embodiment 3 zirconia adsorbent

[0042] Embodiment 1-Example 3 prepares zirconia adsorbent according to the preparation process conditions given in Table 1 through the following steps:

[0043] (S1) Concentrated sulfuric acid, the first organic solvent and zirconium n-butoxide are uniformly mixed according to the ratio given in Table 1 to prepare solution A;

[0044] (S2) Mix the second organic solvent and deionized water according to the ratio given in Table 1 to prepare solution B;

[0045] (S3) adding solution B dropwise to solution A to obtain a solid colloid, which is cured and dried at 80° C. to obtain a zirconia precursor;

[0046] (S4) Calcining the obtained zirconia precursor at 500-600°C for 3-6 hours under air ventilation conditions to obtain massive zirconia, which is ground and sieved (through 100-mesh and 200-mesh sieves in sequence) That is, the zirconia adsorbent is obtained.

[0047] Embodiment 1-Example 3 Zirconia adsorb...

Embodiment 4

[0069] Example 4 Separation and enrichment of vanadium and chromium in the liquid after vanadium precipitation

[0070] In this example, the zirconia prepared in Example 2 was used as the adsorbent.

[0071] (1) Adsorption of vanadium from the solution after vanadium precipitation

[0072] To the first container filled with the solution after vanadium precipitation (the concentration of vanadium is 100.7mg / L, and the concentration of chromium is 99.07mg / L), adding nitric acid with a concentration of 1M to adjust the pH value of the solution after vanadium precipitation to 3, and then according to the zirconia The ratio of the mass of the adsorbent to the volume of the vanadium-precipitated liquid is 0.8g / L. Put the zirconia adsorbent into the vanadium-precipitated liquid after adjusting the pH value for vanadium adsorption. Zirconia adsorbent with vanadium (V-ZrO 2 ) and the liquid after primary adsorption;

[0073] (2) Adsorption of chromium from the liquid after primary a...

Embodiment 5

[0077] Example 5 Separation and enrichment of vanadium and chromium in the solution after vanadium precipitation

[0078] In this example, the zirconia prepared in Example 2 was used as the adsorbent.

[0079] (1) Adsorption of vanadium from the solution after vanadium precipitation

[0080] In the first container filled with the vanadium-precipitated liquid (the vanadium concentration is 100.7mg / L, the chromium concentration is 99.07mg / L), adding the hydrochloric acid with a concentration of 1M to adjust the pH value of the vanadium-precipitated liquid to 3, and then according to the zirconia The ratio of the mass of the adsorbent to the volume of the vanadium-precipitated liquid is 0.8g / L. Put the zirconia adsorbent into the vanadium-precipitated liquid after adjusting the pH value for vanadium adsorption. Zirconia adsorbent with vanadium (V-ZrO 2 ) and the liquid after primary adsorption;

[0081] (2) Adsorption of chromium from the liquid after primary adsorption

[00...

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Abstract

The invention discloses an adsorption method for separating and extracting vanadium and chrome from solutions after vanadium precipitation. The vanadium and the chrome are separated and enriched fromthe solutions after vanadium precipitation by taking advantage of the difference between adsorbabilities of zirconia adsorbents for the vanadium and the chrome under different pH conditions; and the adsorption method has the characteristics of high operability, high separation efficiency and the like, and the technical problems that the vanadium and the chrome are hard to separate and extract through single adsorbents selectively are solved.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment and relates to a method for separating and extracting vanadium and chromium from liquid after vanadium precipitation. Background technique [0002] Vanadium and chromium have a wide range of applications in modern industry. However, vanadium (V) and chromium (Cr) usually exist in vanadium-containing titanomagnetite as associated ores, especially in the Panzhihua area of ​​my country, where they are often combined with metals such as titanium, iron, cobalt, nickel, and platinum. The current vanadium extraction methods include direct extraction from high-grade ores (such as vanadium-containing magnetite) and extraction from low-grade ores (such as vanadium slag). However, due to the similar chemical properties of vanadium and other metals, V (group V element) and Cr (group VI element) are always introduced into the extraction solution at the same time during the extraction process of vanad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B34/22C22B34/32C02F1/28C02F103/10
CPCC02F1/281C02F2103/10C22B7/006C22B34/22C22B34/32Y02P10/20
Inventor 蒋炜吴伯泱田文吴潘刘长军
Owner SICHUAN UNIV
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