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Graded extraction method of FCC slurry solids

A technology of fractional extraction and solid content, which is applied in the petroleum industry, cracking, catalytic cracking, etc., and can solve the problem of not being able to comprehensively and accurately reflect the original state of the solid content in the oil slurry.

Active Publication Date: 2020-07-14
GUANGDONG UNIV OF PETROCHEMICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problem that the existing commonly used FCC oil slurry solid content extraction method cannot comprehensively and accurately reflect the original state of the solid content in the oil slurry, the present invention provides a graded extraction method for FCC oil slurry solid content

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: the fractional extraction method of FCC oil slurry solid content, concrete extraction method is as follows:

[0026] (1) Heat the catalytic cracking oil slurry to 50°C and stir at constant temperature for 20 min;

[0027] (2) Take the pretreated FCC oil slurry, dilute it with dual solvent n-heptane-ethanol (volume ratio 1:2), and ultrasonically vibrate the diluted FCC oil slurry for later use;

[0028] (3) Filter the diluted oil slurry with a filter membrane with a pore size of 0.22 μm;

[0029] (4) Extract the solid content obtained after filtration with the dual solvent described in step (2), until the liquid in the extractor is colorless and transparent, take out the solid content after extraction, dry it, and set aside;

[0030] (5) Extract part of the solid content obtained in step (4) with the solvent cyclohexane until the liquid in the extractor is colorless and transparent, take out the extracted solid content and dry it for later use;

[0031] (...

Embodiment 2

[0032] Embodiment 2: the fractional extraction method of FCC oil slurry solid content, concrete extraction method is as follows:

[0033] (1) Heat the FCC oil slurry to 55°C and stir at constant temperature for 20 min;

[0034] (2) Take the pretreated FCC oil slurry, dilute it with dual-solvent petroleum ether (60-90)-toluene (volume ratio 1:2), and ultrasonically vibrate the diluted FCC oil slurry for later use;

[0035] (3) Filter the diluted oil slurry with a filter membrane with a pore size of 0.22 μm;

[0036] (4) Extract the solid content obtained after filtration with the dual-solvent petroleum ether (60-90)-toluene (volume ratio 1:2) described in step (2) until the liquid in the extractor is colorless Transparent, take out the extracted solids and dry them for later use;

[0037] (5) Extract part of the solid content obtained in step (4) with the solvent benzene until the liquid in the extractor is colorless and transparent, take out the extracted solid content and d...

Embodiment 3

[0039] Embodiment 3: the graded extraction method of FCC oil slurry solid content, concrete extraction method is as follows:

[0040] (1) Heat the FCC oil slurry to 60°C and stir at constant temperature for 20 min;

[0041] (2) Take the pretreated FCC oil slurry, dilute it with dual solvent n-heptane-dichloroethane (volume ratio 1:2), and ultrasonically vibrate the diluted FCC oil slurry for later use;

[0042] (3) Filter the diluted oil slurry with a filter membrane with a pore size of 0.22 μm;

[0043] (4) Extract the solid content obtained after filtration with the dual solvent n-heptane-dichloroethane (volume ratio 1:2) described in step (2) until the liquid in the extractor is colorless and transparent shape, take out the extracted solids and dry them for later use;

[0044] (5) Extract part of the solid content obtained in step (4) with the solvent xylene until the liquid in the extractor is colorless and transparent, take out the extracted solid content and dry it for...

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Abstract

The invention discloses a graded extraction method of FCC slurry solids. The graded extraction method comprises the following steps: (1) pretreating FCC slurry; (2) taking the pretreated FCC oil slurry, diluting the FCC oil slurry with a double solvent A-B, and then carrying out ultrasonic oscillation; (3) filtering the diluted oil slurry by a filter membrane; (4) extracting the solid content obtained after filtering by using the double solvents in the step (2) until the liquid in the extractor is colorless and transparent, and performing drying; (5) extracting part of the solid content obtained in the step (4) with a solvent C until the solid content is colorless and transparent, and performing drying; and (6) extracting part of the solid content obtained in the step (5) by using a solvent D until the solid content is colorless and transparent, taking out the extracted solid content, and drying. According to the method, the problem of incomplete solid content enrichment or impurity increase in a conventional extraction method is effectively avoided, the real situation of the solid content in the FCC oil slurry can be more comprehensively reflected, and the solid content with different wrapping degrees can be obtained.

Description

technical field [0001] The invention relates to a method for extracting solid content, in particular to a method for fractional extraction of solid content in FCC oil slurry. Background technique [0002] FCC oil slurry is a by-product of the catalytic cracking process. Because it contains a large amount of short-chain polycyclic aromatic hydrocarbons, it has become a potential raw material for the production of high value-added chemical products such as activated carbon, needle coke and carbon fiber. However, FCC oil slurry generally contains more catalyst particles and coke powder, and these solids seriously limit its efficient utilization, so it is necessary to remove the solids in FCC oil slurry. Before removing the solids, it needs to be extracted and separated from the FCC oil slurry for detailed characterization, and then an appropriate method for removing solids should be selected according to its properties. Accurate solid content extraction method is an important ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G11/18
CPCC10G11/182
Inventor 林存辉周如金吴世逵段林海张尤华曾兴业王丽单书峰张战军
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH
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