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A method for recovering nickel and vanadium from molten chlorination volatilization in waste FCC catalyst

A chlorination volatilization and catalyst technology, applied in the field of harmless treatment of waste FCC catalysts, can solve the problems of difficult and low-cost effective recycling, difficult iron solution treatment, high Si leaching rate, and achieves low environmental impact and high regeneration utilization rate. , the effect of strong regional adaptability

Active Publication Date: 2018-08-14
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mixed acid leaching method has problems such as large acid consumption, high leaching rate of Al and Si, and difficulty in handling the obtained solution containing nickel, vanadium and iron.
[0008] In summary, the waste FCC catalyst contains nickel with a mass percentage of generally 0.3-6%, but part of the nickel in the waste FCC catalyst has been embedded in the molecular sieve lattice, and it is difficult to achieve low-cost, Efficient recycling without pollution

Method used

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  • A method for recovering nickel and vanadium from molten chlorination volatilization in waste FCC catalyst
  • A method for recovering nickel and vanadium from molten chlorination volatilization in waste FCC catalyst
  • A method for recovering nickel and vanadium from molten chlorination volatilization in waste FCC catalyst

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Experimental program
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Effect test

Embodiment 1

[0046] A method for recovering nickel and vanadium from molten chlorination and volatilization from waste FCC catalysts, using waste FCC catalysts discharged from a petroleum cracking plant in Shandong as raw material, the main elemental components of the waste FCC catalysts are shown in Table 1 below:

[0047] Table 1:

[0048]

[0049]

[0050] The method comprises: taking 100g of the spent FCC catalyst (wherein, the spent FCC catalyst with a particle size less than 0.075mm accounts for 40% of the total spent FCC catalyst), and adding 7g of anhydrous calcium chloride, 1g of anthracite, and 20g of calcium oxide, and mixing uniformly , so as to obtain the mixed material to be smelted. Put the mixed material to be smelted into the corundum crucible, cover the crucible lid, put the crucible containing the mixed material to be smelted into a closed tubular heating furnace, cover the sealing end cover of the tubular furnace tightly, and connect the air inlet and the gas out...

Embodiment 2

[0053] A method for recovering nickel and vanadium by reducing smelting from waste FCC catalysts, using waste FCC catalysts discharged from a certain petroleum cracking plant in Hebei as raw material, the main elemental components of the waste FCC catalysts are shown in Table 2 below:

[0054] Table 2:

[0055] element

Ni

V

Al 2 o 3

SiO 2

Fe

Sb

Ca

content / %

2.80

0.46

45.10

50.20

0.57

0.21

0.26

[0056] The method comprises: taking 100g of the spent FCC catalyst (wherein, the spent FCC catalyst with a particle size less than 0.075mm accounts for 45% of the spent FCC catalyst), and adding 10g of anhydrous magnesium chloride, 1g of coke powder, and 20g of quartz sand, and mixing evenly, Thus, the mixed material to be smelted is obtained. Put the mixed material to be smelted into the corundum crucible, cover the crucible lid, put the crucible containing the mixed material to be smelted into a closed tubula...

Embodiment 3

[0059]A method for recovering nickel and vanadium by reduction smelting from waste FCC catalysts, using waste FCC catalysts discharged from a certain petroleum cracking plant in Gansu as raw material, the main elemental components of the waste FCC catalysts are shown in Table 3 below:

[0060] table 3:

[0061] element

Ni

V

Al 2 o 3

SiO 2

Fe

Sb

Ca

content / %

2.16

0.36

45.47

51.05

0.43

0.18

0.23

[0062] The method comprises: taking 100g of the spent FCC catalyst (wherein, the spent FCC catalyst with a particle size less than 0.075mm accounts for 50% of the spent FCC catalyst), and adding 9g of anhydrous calcium chloride, 1g of charcoal, and 25g of limestone, and mixing evenly, Thus, the mixed material to be smelted is obtained. Put the mixed material to be smelted into the corundum crucible, cover the crucible lid, put the crucible containing the mixed material to be smelted into a closed tubular heatin...

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Abstract

The invention discloses a method for recovering nickel and vanadium from a waste FCC (Fluid Catalytic Cracking) catalyst through molten chlorination volatilizing. The method comprises the following steps: adding a chlorinating agent, a reducing agent and a slag forming constituent to the waste FCC catalyst, and uniformly mixing to obtain a mixture to be molten; performing molten chlorination on the mixture to be molten through a melting furnace for 30 to 300 minutes at the temperature of 1250 to 1700 DEG C so as to obtain smoke containing nickel and vanadium chloride; charging the smoke containing the nickel and vanadium chloride into a smoke washing system to wash and defog the smoke so as to obtain a solution rich in nickel and vanadium; and then separating nickel and vanadium from the solution rich in nickel and vanadium by a solvent extraction method so as to obtain vanadium pentoxide and nickel chloride. With the adoption of the method, the recovery rate of nickel and vanadium can be greatly increased; in addition, the method is simple in technology, short in process, flexible to operate, high in recycling rate, and high in geographical adaptability; the produced wastewater, waste gas and slag are nontoxic and harmless, so that the environment is influenced a little.

Description

technical field [0001] The invention relates to the technical field of harmless treatment of waste FCC (Fluid Catalytic Cracking, fluidized catalytic cracking) catalysts in the petrochemical industry, in particular to a method for recovering nickel and vanadium from waste FCC catalysts by molten chlorination and volatilization. Background technique [0002] FCC catalyst is the most used catalyst in petroleum refining process, and its main component is zeolite molecular sieve. During the catalytic cracking process of crude oil containing metals, the metal compounds in the crude oil will be completely decomposed and accumulated on the FCC catalyst; with the continuous recycling of the FCC catalyst, the metals deposited on the FCC catalyst will gradually increase, which will affect the oil quality. Therefore, it is necessary to regularly and quantitatively discharge the FCC catalyst with excess metal deposits (that is, spent FCC catalyst) and replenish fresh FCC catalyst. Thes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B23/02C22B23/00C22B34/22
CPCC22B7/001C22B7/006C22B23/026C22B23/0453C22B34/225
Inventor 王云常耀超阮书锋李云徐晓辉王为振黄海辉
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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