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Wet recovery method and device for oil-containing waste catalyst

A technology of waste catalyst and recovery method, which is applied in the direction of improvement of process efficiency, photographic process, instruments, etc., and can solve the problems of poor utilization of organic hydrocarbons, long deoiling or sodium roasting time, and harmful gas hazards Environmental problems, to avoid low current efficiency, simple liquid and solid phase components, and reduce extraction time

Pending Publication Date: 2020-08-18
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, CN185460A discloses a method for extracting vanadium, molybdenum, nickel and aluminum from waste aluminum-based catalysts, CN105274344A discloses a method for recovering vanadium and molybdenum from waste petroleum catalysts, and CN105274343A discloses a method for extracting vanadium and molybdenum from petroleum hydrogenation catalysts. In the method of tungsten and nickel, the waste catalyst is decarburized and deoiled by oxidative roasting, and then roasted at a high temperature to convert the metal mineral phase into a meltable phase and then extract the metal. When using this type of process to treat the spent catalyst , the phase transition between oil and metal minerals is carried out in two steps, not only the organic hydrocarbons have not been well utilized, but also the deoiling or sodium roasting takes a long time and consumes a lot of energy, and the process produces harmful gases and is easy to endanger the environment

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  • Wet recovery method and device for oil-containing waste catalyst

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Embodiment 1

[0050] The mass percentage of oil components in a spent catalyst for desulfurization and hydrogenation is 12%, and the contents of vanadium, nickel, molybdenum, cobalt, aluminum, and sulfur are 5.4%, 3.3%, 0.9%, 1.2%, 27.3%, and 8.3%, respectively. The content of other metals is less; the content of oil compounds and sulfur in the catalyst is more. Adopt the device in the embodiment of the present invention, use 5% sulfuric acid solution as the acidic electrolyte aqueous solution, input voltage, positive and negative potential difference is 3V, vanadium, nickel, cobalt can be soaked, after room temperature electrochemical reaction separation 120min, obtain 98% oil The molybdenum compounds are collected in the oil collection tank, and more than 90% of the molybdenum compounds and S are enriched in the hydrophobic inorganic particles in the form of simple substances, and the recovery rates of vanadium, nickel, cobalt, and aluminum deposited by the cathode are all above 98%.

Embodiment 2

[0052] Waste aluminum-based platinum palladium catalyst, which contains 2.5% oil. Using the device in the embodiment of the present invention, using 3.5% hydrochloric acid as the acidic electrolyte solution, the input voltage, the potential difference between the anode and the anode is 2V, electrochemically dissolving in the electrochemical reaction chamber, selectively removing oil and leaching the cathode to deposit platinum palladium, The extraction rate of platinum and palladium is more than 99%, while the leaching rate of aluminum is less than 20%. The remaining high-alumina products are discharged as leaching residue and used as high-purity alumina raw materials. The recovery rate of oil compounds reaches 95%.

Embodiment 3

[0054]For the spent SCR catalyst, the oil component is 4.5%. Adopt the device in the embodiment of the present invention, use 5% nitric acid as the acidic electrolyte aqueous solution, under 40 ℃, input voltage, the potential difference of cathode and anode is 1.5V, carry out electrochemical catalytic leaching, the recovery rate of vanadium and nickel reaches more than 97% , The recovery rate of oil compounds is above 96%.

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Abstract

The invention discloses a wet recovery method for an oil-containing waste catalyst. The wet recovery method for the oil-containing waste catalyst comprises the following steps: 1, filling an electrochemical reaction chamber between a cathode and a rotating anode of a rotating electrode electrolytic cell with oil-containing waste catalyst particles; 2, circularly charging an acidic electrolyte intothe electrolytic cell; 3, inputting voltage to the electrolytic cell, and carrying out electrochemical separation on the oil-containing waste catalyst to obtain an oil compound and leached metal components; 4, discharging the oil compound obtained in the step 3 into an oil-water separation device along with the electrolyte, carrying out separation to obtain the oil compound containing particles on the upper layer and the electrolyte solution on the lower layer, and returning the electrolyte solution on the lower layer to the electrolytic cell; and 5, transferring the metal components obtainedin the step 3 to the cathode under the action of electric field force, and carrying out electrodeposition enrichment to obtain a metal mixture. According to the method, the deoiling of the wet oil-containing waste catalyst and the separation and recovery of the inorganic metal components are synchronously achieved, the extraction time is short, and the working efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of electrochemical hydrometallurgy, and in particular relates to a wet recovery method for oil-containing waste catalysts, and in particular to a wet recovery device for oil-containing waste catalysts. Background technique [0002] Oil-containing waste catalysts are commonly found in petrochemical, coal chemical, material synthesis, metallurgy, pharmaceutical and other industries. Such waste catalysts are often inactivated due to surface adsorption or excessive deposition of oil compounds or metal compounds. There are many organic compounds adsorbed on the surface of spent catalysts, usually containing 5-20% oily substances, such as hydrocarbon oils, organic gels, etc. Due to the large surface area of ​​spent catalysts and the adsorption of deposited carbon on the surface, deoiling of spent catalysts is difficult. Waste catalyst is also an important secondary resource of metal elements. For example, the cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C25C1/24
CPCC22B7/009C22B7/006C25C1/24Y02P10/20
Inventor 康金星王亚运宋磊于传兵吕东郭素红刘志国王传龙王鑫仇云飞
Owner CHINA ENFI ENGINEERING CORPORATION