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Method for recycling waste hydrogenation catalyst

A technology of spent hydrogenation catalysts and spent catalysts, applied in the direction of catalyst carriers, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as environmental hazards and waste of resources, and reduce environmental hazards, reduce pollution, reduce pollution effect

Active Publication Date: 2016-06-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hydrogenation catalysts adsorb and carry some toxic and harmful substances during use. If they are not treated, they will inevitably cause harm to the environment.
At the same time, the spent catalyst contains carrier materials and active metals. If it is not recycled, it will cause a lot of waste of resources.

Method used

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  • Method for recycling waste hydrogenation catalyst
  • Method for recycling waste hydrogenation catalyst
  • Method for recycling waste hydrogenation catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Under the action of ultrasonic waves, feed chlorine gas and air into the container containing the above-mentioned treated spent catalyst powder, the volume ratio of chlorine gas to air is 5:1, and the frequency of ultrasonic waves is 100kHz to react. The solid product obtained from the reaction was transferred into a container filled with nitrogen, and heated to 700°C to separate the gas-solid phase, and condense and recover the metal from the gas phase, with a metal recovery rate of 81%. The solid residue after separation was washed with distilled water, and dried at 100° C. for 12 hours after washing. Add 3wt% scallop powder and 2wt% nitric acid to the dried material, knead it, shape it, and dry it at 120°C for 2 hours. The dried carrier was calcined at 700° C. for 3 hours in a nitrogen atmosphere to obtain an alumina-carbon composite carrier A.

Embodiment 2

[0033] Under the action of ultrasonic waves, feed chlorine gas and air into the container containing the above-mentioned treated spent catalyst powder, the volume ratio of chlorine gas to air is 4:1, and the frequency of ultrasonic waves is 80kHz to react. The solid product obtained from the reaction was transferred into a container filled with nitrogen, and heated to 750°C to separate the gas-solid phase, and condense and recover the metal from the gas phase, with a metal recovery rate of 83%. The solid residue after separation was washed with distilled water, and dried at 100° C. for 12 hours after washing. The dried material is mixed with pseudo-boehmite at a mixing ratio of 2:1, 3wt% safflower powder and 2wt% nitric acid are added, kneaded and shaped, and dried at 120°C for 2 hours. The dried carrier was calcined at 700° C. for 3 hours in a nitrogen atmosphere to obtain an alumina-carbon composite carrier B.

Embodiment 3

[0035]Under the action of ultrasonic waves, feed chlorine gas and air into the container containing the above-mentioned treated spent catalyst powder, the volume ratio of chlorine gas to air is 5:1, and the frequency of ultrasonic waves is 100kHz to react. The solid product obtained from the reaction was moved into a container filled with nitrogen, and heated to 700°C to separate the gas-solid phase, and condense and recover the metal from the gas phase, with a metal recovery rate of 86%. The solid residue after separation was washed with distilled water, and dried at 100° C. for 12 hours after washing. The dried material is mixed with pseudo-boehmite in a mixing ratio of 3:1, 3wt% safflower powder and 2wt% acetic acid are added, kneaded and shaped, and dried at 120°C for 2 hours. The dried carrier was calcined at 700° C. for 3 hours in a nitrogen atmosphere to obtain an alumina-carbon composite carrier C.

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Abstract

The invention discloses a method for recycling a waste hydrogenation catalyst. The method comprises the following steps: (1) subjectintg the waste hydrogenation catalyst to deoiling and grinding successively so as to obtain powder; (2) washing the waste catalyst powder with hydrochloric acid and then successively carrying out filtering, washing and drying; (3) introducing chlorine and air into a container used in the step (2) under the action of supersonic waves and carrying out a reaction; (4) transferring a solid product obtained in the step (3) into a container filled with nitrogen, carrying out heating to allow metallic molybdenum and nickel or chloride or oxychloride of cobalt and vanadium to be volatilized, thereby separating a gas phase from a solid phase, carrying out condensation on the gas phase to recover metal, washing residual solids obtained after separation with water or an acidic solution and then carrying out drying; (5) subjecting a material obtained in the step (4) with an extrusion aid and a binder to kneading and compacting and then carrying out drying; and (6) roasting a molded carrier obtained in the step (5) in a nitrogen atmosphere so as to prepare an alumina-carbon composite carrier. The method not only can recover metallic active components and use waste alumina powder.

Description

technical field [0001] The invention relates to a method for recycling spent hydrogenation catalysts, belonging to the technical field of catalyst separation and recovery. Background technique [0002] At present, industrial hydrotreating catalysts usually use alumina or alumina containing a small amount of additives as the carrier, and the metal elements of Group VIII and Group VIB as active components. [0003] Hydrotreating catalysts, including hydrotreating and hydrocracking catalysts, are widely used on facilities worldwide. After being used for hydroprocessing, spent or deactivated spent catalyst forms a large amount of solid waste. [0004] Due to increasingly stringent environmental regulations, the impact of waste disposal from industry on the environment is subject to stricter scrutiny. The hydrogenation catalyst absorbs and carries some toxic and harmful substances during its use. If it is not treated, it will inevitably cause harm to the environment. At the sa...

Claims

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Application Information

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IPC IPC(8): B01J32/00C22B7/00C22B23/00C22B34/34C22B34/22
CPCY02P10/20
Inventor 刘文洁王刚隋宝宽王永林安晟吴国林
Owner CHINA PETROLEUM & CHEM CORP
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