Recycling method of slurry-bed hydrocracking catalyst for heavy oil

A hydrocracking and suspension bed technology, applied in physical/chemical process catalysts, chemical instruments and methods, catalyst regeneration/reactivation, etc., can solve the problems of easily damaged catalyst structure, poor economic recovery of spent catalyst, long extraction process, etc. problems, to achieve significant economic benefits and environmental protection effects, cost reduction, and pollution reduction effects

Inactive Publication Date: 2016-10-12
FUZHOU UNIV ASSET MANAGEMENT CO LTD +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0008] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that the extraction process is long, the process is complicated, the catalyst structure is easily damaged, the recovery of spent catalysts with low precious metal content is economical, and secondary pollution, thereby providing a Recycling method of heavy oil suspension bed hydrocracking catalyst with high efficiency, simple process flow, low cost, no pollution, and no damage to catalyst structure

Method used

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  • Recycling method of slurry-bed hydrocracking catalyst for heavy oil

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Experimental program
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Effect test

Embodiment 1

[0041] In the suspension bed hydrocracking unit, after a certain amount of medium-temperature coal tar and catalyst are reacted at 440°C and 22MPa, the tail oil after the high-pressure separator is collected, and the solids in the lower part of the centrifuge tube are collected by centrifugal separation technology. The collected solid was then dissolved with toluene as a solvent, heated to boiling, and continuously extracted in a Soxhlet extractor until the upper solvent was clarified. The solvent-insoluble material was dried in a vacuum drying oven at 110° C. for 4 hours, then heated to 500° C. in a tube furnace and calcined for 2 hours to obtain recovered catalyst F1.

Embodiment 2

[0043] In the suspension bed hydrocracking unit, after a certain amount of high-temperature coal tar reacts with the catalyst at 440°C and 22MPa, the tail oil after the high-pressure separator is collected, and the solids in the lower part of the centrifuge tube are collected by cyclone separation technology. Then dissolve the collected solid with petroleum ether solvent, and heat it to boiling in a Soxhlet extractor to continuously extract until the upper solvent is clear. Then, the solvent-insoluble material was dried in a vacuum oven at 110° C. for 4 hours, and then heated to 550° C. in a tube furnace and calcined for 4 hours to obtain recovered catalyst F2.

Embodiment 3

[0045] In the suspension bed hydrocracking unit, after a certain amount of vacuum residue and catalyst are reacted at 440°C and 22MPa, the tail oil after the high-pressure separator is collected, and the solids in the lower part of the centrifuge tube are collected by centrifugal separation technology. Then dissolve the collected solid with V (toluene): V (ethanol) = 1:1 mixed solvent, and heat to boiling in a Soxhlet extractor to continuously extract until the upper solvent is clear. The solvent-insoluble material was then dried in a vacuum oven at 110° C. for 4 hours, and then heated to 550° C. in a tube furnace and calcined for 8 hours to obtain recovered catalyst F3.

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Abstract

The invention discloses a recycling method of a slurry-bed hydrocracking catalyst for heavy oil and belongs to the field of catalyst recycling. According to the recycling method of the slurry-bed hydrocracking catalyst for the heavy oil, soluble oil on solid-phase substances in tail oil is heated, extracted and removed by a solvent extractor. The method has the advantages that the technological process is simple, the catalyst structure is not damaged, the recycling cost is low, and pollution is avoided.

Description

technical field [0001] The invention belongs to the field of catalyst recovery and relates to a method for recovery and utilization of heavy oil suspended bed hydrocracking catalysts. Background technique [0002] With the gradual reduction of oil resources, crude oil is gradually showing a trend of inferior and heavy quality. At present, the heavy oil processing technologies used in refineries around the world include delayed coking, visbreaking, catalytic cracking, fixed bed and suspension bed hydrogenation, and solvent deasphalting, and the suspension bed hydrocracking technology can be processed to a certain extent. Inferior raw materials that other technologies are not capable of, the device is not easy to coke, and can be operated for a long period of time. At the same time, the yield and conversion rate of light oil are high, especially the high yield of diesel fractions, which is helpful for improving the gasoline-diesel ratio that is common in existing technology pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J38/56B01J38/52B01J38/02
CPCB01J38/56B01J38/02B01J38/52
Inventor 江莉龙马永德曹彦宁陈建军
Owner FUZHOU UNIV ASSET MANAGEMENT CO LTD
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