Method for separating and extracting vanadium and nickel from waste catalysts

A waste catalyst, vanadium-nickel technology, applied in the field of separation and extraction of valuable metals from solid waste resources, can solve the problems of vanadium recovery rate of only 72-78.3%, high processing temperature, low vanadium recovery rate, etc. Low temperature, avoiding the effect of simultaneous leaching

Active Publication Date: 2020-06-05
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the recovery rate of nickel in this method is good, the treatment temperature is as high as 1500-1700°C, the energy consumption is high, the cost is high, and the recovery rate of vanadium can only reach 80-84%, which is low
Patent CN106498165A discloses a method for recovering nickel and vanadium from waste catalyst by melting chlorination and volatilization. The specific process is: add chlorination agent, reducing agent and slagging agent to the waste catalyst, and then melt chlorine at 1250-1700 °C 30-300min, so as to obtain flue gas containing nickel and vanadium chloride; this method also belongs to melting pool smelting, the smelting temperature is high, the recovery rate of nickel is greater than 92%, but the recovery rate of vanadium is only 72-78.3%

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Get nickel-containing 0.52%Ni, 0.3%V waste ultra-stable Y-type FCC catalyst 1000g, add 100g graphite, 50g calcium chloride and 100g vanadium-nickel collector (mol ratio is 1:1 iron powder and Composed of ferric oxide) mixed and ground to 200 mesh, then added 150g of water to make pellets with a diameter of 1cm, and then roasted at 1050°C (into nitrogen during the process) for 60min, and then continued to increase the temperature to 1200°C at Roasting (into nitrogen during the process) 90min. After roasting, the material is ground to 150 meshes, and then separated by magnetic separation to obtain a sponge iron alloy enriched in nickel and vanadium. The recovery rate of nickel was 93.2%, and the recovery rate of vanadium was 90.1%.

Embodiment 2

[0094] Get nickel-containing 5%Ni, 1000g of ultra-stable Y-type FCC spent catalyst of 1.5%V, add 400g coke, 300g calcium chloride and 200g vanadium-nickel collector (the mol ratio is 1.5:1 iron powder and ferric oxide Composition) Mix and grind to 150 mesh, add 100g of water to make pellets with a diameter of 3cm, then roast at 950°C for 120min, continue to raise the temperature to 1250°C for roasting (in the process, N 2 ) for 30 minutes, after roasting, the material was ground to 200 mesh, and then separated by magnetic separation to obtain sponge iron alloy A enriched in nickel and vanadium. The recovery rate of nickel was 99.2%, and the recovery rate of vanadium was 96.6%.

[0095]Sponge iron alloy A was oxidized and roasted at 500°C for 40 minutes, and then according to the theoretical amount of sodium metavanadate generated by the reaction of vanadium and sodium carbonate in sponge iron alloy A, sodium carbonate was added to the roasted material and mixed by ball milling...

Embodiment 3

[0106] Get nickel-containing 0.2%Ni, 2000g of the ultra-stable Y-type spent FCC catalyst of 0.1%V, add 400g petroleum coke, 100g calcium chloride and 300g vanadium-nickel collector (leaching in iron powder and embodiment 2) in spent catalyst Slag C; the molar ratio is 1:1) mixed and ground to 80 mesh, then added 300g of water to make pellets with a diameter of 2cm, and then roasted at 1000°C (introducing N2 during the process) for 90min, and continued to increase the temperature to Baking at 1210°C (in the process of feeding N2) for 50min. After roasting, the material is ground to 180 mesh and separated by magnetic separation to obtain sponge iron alloy A1 enriched in nickel and vanadium. The recovery rate of nickel was 92.4%, and the recovery rate of vanadium was 90.8%.

[0107] Sponge iron alloy A1 was oxidized and roasted at 400°C for 120 minutes, then 1.5 times the theoretical amount of sodium metavanadate produced by the reaction of vanadium and sodium bicarbonate in spo...

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Abstract

The invention discloses a method for separating and extracting vanadium and nickel from waste catalysts. The waste catalysts containing vanadium and nickel, carbonaceous reducing agents, calcium chlorides, vanadium and nickel collecting agents and water are mixed for pelletizing to obtain pellets, then first roasting and secondary roasting are carried out, magnetic separation is conducted after roasting to obtain sponge iron alloys rich in nickel and vanadium; secondary roasting and water leaching treatment are conducted on the sponge iron alloys rich in nickel and vanadium to obtain vanadiumleaching agents and nickel slag through separation; the nickel slag is mixed with sulfuric acid, and secondary roasting and water leaching are carried out to obtain nickel leaching agents and leachingresidues; and the leaching residues are circularly applied. The method has the advantages that the process is simple, the cost is low, the extraction ratio of nickel and vanadium is high, iron elements are recycled, and the method is suitable for industrialized application.

Description

technical field [0001] The invention belongs to the field of separation and extraction of valuable metals from solid waste resources, and in particular relates to a method for separating and extracting vanadium and nickel from waste catalysts. Background technique [0002] Fluid catalytic cracking (FCC) is an important part of modern refining petroleum production process, and FCC catalyst is usually used to promote the reaction. According to composition and structure, FCC catalysts can be classified into rare earth Y type, rare earth hydrogen Y type, and ultrastable Y type. In the petroleum refining process, as the processing time prolongs, the physical and chemical properties of the FCC catalyst will change, which will lead to the deactivation of the catalyst and the formation of spent catalyst. Rare earth Y type and rare earth hydrogen Y type have a variety of utilization technologies for comprehensive recovery and treatment because of their high content and high extracti...

Claims

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Application Information

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IPC IPC(8): C22B1/24C22B1/02C22B1/06C22B7/00C22B23/00C22B23/02C22B34/22
CPCC22B1/02C22B1/06C22B1/2406C22B7/001C22B7/006C22B23/023C22B23/026C22B23/0407C22B34/225Y02P10/20
Inventor 王明玉张长达胡斌廖志琴赵士杰王学文
Owner CENT SOUTH UNIV
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