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Recycling method of waste catalysts

A waste catalyst and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the waste of alumina carrier and the inability of waste catalyst replacement devices to meet the needs of waste catalysts. Catalyst reuse and other issues, to achieve the effect of improving environmental conditions, good economic benefits, and improving recovery efficiency

Active Publication Date: 2018-05-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing recycling of spent catalysts mainly considers the recovery of metals or the reuse of replacement devices. The simple recycling of metals leads to a large amount of waste of alumina carriers, and the replacement devices of spent catalysts cannot meet the requirements of recycling all used catalysts.

Method used

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  • Recycling method of waste catalysts

Examples

Experimental program
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Effect test

example 1

[0024] Take the molybdenum-nickel series catalyst after industrial operation for extraction and deoiling, dry, microwave treatment, and the treatment time is 5h; weigh 100g of the catalyst, crush it to 300 mesh; weigh 166g of sodium carbonate, mix it with the spent catalyst, and roast at 850°C for 4h Carry out leaching with 500g hot water of 90 ℃, filter, remaining filter residue 1. After filtering, the solution and the acidic solution (aluminum sulfate) were prepared at a temperature of 60°C and a pH value of 7 to prepare pseudo-boehmite, and filtered to obtain filtrate 1; the pseudo-boehmite was mixed with an adhesive, formed, and then Roast at 700°C for 3 hours to obtain 86g of carrier; slowly add hydrochloric acid to the filtrate 1 to adjust to acidity, raise the temperature to 60°C, add 300g of activated carbon of 200 meshes for activated carbon adsorption; after adsorption for 3 hours, desorb with ammonia water and prepare a concentration of 0.55 Ammonium molybdate solut...

example 2

[0026] Take the molybdenum-nickel series catalyst after industrial operation for extraction and deoiling, dry, and microwave treatment for 8 hours; weigh 100g of the catalyst, crush it to 300 mesh; weigh 166g of sodium carbonate, mix it with the spent catalyst, and roast at 850°C for 4 hours Carry out leaching with 500g hot water of 90 ℃, filter, remaining filter residue 1. After filtering, the solution and the acidic solution (aluminum sulfate) were prepared at a temperature of 60°C and a pH value of 7 to prepare pseudo-boehmite, and filtered to obtain filtrate 1; the pseudo-boehmite was mixed with an adhesive, formed, and then Roast at 700°C for 3 hours to obtain 86g of carrier; slowly add hydrochloric acid to the filtrate 1 to adjust it to acidity, raise the temperature to 60°C, add 300g of activated carbon of 100 meshes for activated carbon adsorption; after 3 hours of adsorption, desorb with ammonia water and prepare a concentration of 0.55 Ammonium molybdate solution of ...

example 3

[0028] Take the molybdenum-nickel series catalyst after industrial operation for extraction and deoiling, dry, microwave treatment, and the treatment time is 5h; weigh 100g of the catalyst, crush it to 300 mesh; weigh 166g of sodium carbonate, mix it with the spent catalyst, and roast at 850°C for 4h Carry out leaching with 500g hot water of 90 ℃, filter, remaining filter residue 1. After filtering, the solution and the acidic solution (aluminum sulfate) were prepared at a temperature of 60°C and a pH value of 7 to prepare pseudo-boehmite, and filtered to obtain filtrate 1; the pseudo-boehmite was mixed with an adhesive, formed, and then Roast at 700°C for 3 hours to obtain 86g carrier; slowly add hydrochloric acid to the filtrate 1 to adjust it to acidity, raise the temperature to 60°C, add 200 meshes of 300g activated carbon for activated carbon adsorption, add complexing agent octahydroxyquinoline during activated carbon adsorption; adsorb 2 After 1 hour, use ammonia water ...

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Abstract

The invention discloses a recycling method of waste catalysts. The recycling method comprises the following contents: (1) carrying out extraction on molybdenum-nickel waste catalysts, and carrying outdrying, microwave treatment and crushing; (2) mixing the crushed catalysts with alkali, and then carrying out high-temperature roasting; (3) carrying out hot-water impregnation and filtering on the roasted catalysts to prepare meta-aluminate filtrate and nickle oxide solid; (4) reacting the filtrate in step (3) with aluminium-salt acid solution, filtering, preparing pseudoboehmite, mixing and kneading the pseudoboehmite, forming and roasting to prepare carriers; (5) adopting active carbon to absorb molybdenum in solution filtered out in step (4) by using active carbon, and absorb ammonia water for desorption after absorption to prepare ammonium molybdate solution; (6) adding acid into solid filtered in step (3), then absorb alkaline solution to regulate the pH value to remove Fe and Al inthe solution, and concentrating to prepare nickle-salt solution; (7) adding nickel-nitrate solution in step (6) into the solution in step (5) to prepare molybdenum-nickel-ammonia solution; (8) carrying out impregnation on the carriers in step (4) and the solution in step (7), and carrying out drying and roasting to prepare catalysts. The recycling method disclosed by the invention has the characteristics of simple process and low treatment cost and the like.

Description

technical field [0001] This article relates to a method for recycling waste catalysts, in particular to a method for preparing hydrogenation catalysts using molybdenum-nickel series waste catalysts, especially for distillate oil molybdenum-nickel series hydrogenation catalysts. technical background [0002] In the modern oil refining and chemical industry, more than 90% of the chemical reactions are realized through catalytic processes, and catalysts become the key to the development of new processes and products for oil refining and chemical industry. However, when the catalyst is converted into a spent catalyst, it will inevitably cause certain harm to the environment. At present, the basic service life of residual oil hydrogenation catalysts is 8000 hours, and each set of residual oil hydrogenation equipment produces hundreds of tons of waste catalysts every year. tens of thousands of tons. The active metal content of molybdenum and nickel on residual oil hydrogenation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/883C22B7/00
CPCB01J23/883C22B7/009Y02P10/20
Inventor 隋宝宽吕振辉刘文洁彭冲彭绍忠
Owner CHINA PETROLEUM & CHEM CORP