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Method for removing powder of catalyst from catalytic cracking oil slurry

A catalytic cracking oil slurry and catalyst technology, applied in the direction of electricity/magnetic dehydration/emulsification, etc., can solve the problems affecting the processing capacity and processing cost

Active Publication Date: 2007-05-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Auxiliary settling can greatly improve the settling effect and shorten the settling time, but even so, the settling time is about 24 hours, or even a few days, and the catalyst powder is enriched in the oil slurry at the bottom of the container, and it has to be filtered and centrifuged Separation and other means to remove catalyst powder and recover oil slurry, all of which affect the treatment capacity and treatment cost

Method used

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  • Method for removing powder of catalyst from catalytic cracking oil slurry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The properties of the treated oil slurry are shown in Table 1.

[0018] project

value

Density (g / cm 3 ), (20°C)

1.0490

Viscosity (mm 2 / s)

80℃

170.9

100℃

53.53

saturated hydrocarbon

29.4％

Aromatics

46.0％

colloid

18.8％

asphaltenes

5.8％

Ash

0.336％

Solidifying point

+12℃

Charcoal residue

14.6％

[0019] Preparation of mixed oil: Take 64g of kerosene and 96g of FCC oil slurry to make mixed oil, take 1 wt% flocculant (polyacrylamide) and 0.8g demulsifier (FC9301) and 15.2g water to make an aqueous solution, take this aqueous solution Preheat with the mixed oil to 95°C, click and mix 50 times in the juice extractor, place in the demulsifier, and apply an electric field of 2000v / cm. Stand still for 1 hour to separate the water, pump out the lower layer of water, take the oil after removal and stir evenly t...

Embodiment 2

[0022] The properties of the oil slurry are shown in Table 1. Use heptane as solvent oil and FCC oil slurry to prepare mixed oil. Take 42g of heptane and 118g of FCC slurry to make mixed oil, take 6.4g of flocculant (polyacrylamide, concentration 1% by weight) and 0.8g of demulsifier (FC9301, concentration of 2% by weight) and 24.8g of water to make an aqueous solution , take this aqueous solution and mixed oil, preheat to 95°C, click and mix 50 times in a juice extractor, put it in a demulsifier, and apply an electric field of 2000v / cm. Stand still for 1 hour to separate the water, pump out the lower layer of water, take the oil after removal and stir evenly to measure the ash content. The test results are shown in Table 3. It can be seen from the test results that heptane has a better removal effect as solvent oil, and the removal rate reaches 97.3%.

[0023] Ash content (weight%)

Embodiment 3

[0025] The properties of the oil slurry are shown in Table 1. Use toluene as solvent oil and FCC oil slurry to prepare mixed oil. Mix 77.7g of toluene with 82.2g of FCC oil slurry to make mixed oil, take 6.4g of flocculant (polyacrylamide, concentration 1% by weight) and 0.8g of demulsifier (FC9301, concentration of 2% by weight) and 24.8g of water to make Aqueous solution, preheat the aqueous solution and mixed oil to 95°C, click and mix 50 times in a juicer, place in a demulsifier, and apply an electric field of 2000v / cm. Stand still for 1 hour to separate the water, pump out the lower layer of water, take the oil after removal and stir evenly to measure the ash content. The test results are shown in Table 4. From the results, the removal rate of toluene as solvent oil is 98.6%.

[0026] Ash content (weight%)

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Abstract

This invention discloses a method for removing catalyst powder from catalytically cracked oil slurry. The method comprises: mixing lightweight solvent oil and catalytically cracked oil slurry to obtain mixed oil with the density lower than water, preheating the mixed oil and water containing demulsifier and flocculant respectively, mixing, demulsifying, and separating the lower layer of water enriched with catalyst powder. The lightweight solvent oil is solvent oil (boiling point is 100-200 deg.C) that is miscible with catalytically cracked oil slurry. The amounts of water, demulsifier and flocculant are 5-30 wt. %, 10-500 ppm and 10-1000 ppm of catalytically cracked oil slurry, respectively. The method has such advantages as short removing time and high removing rate.

Description

technical field [0001] The invention relates to a method for refining hydrocarbon oil, specifically, a method for removing catalyst powder in catalytic cracking oil slurry. Background technique [0002] Catalytic cracking oil slurry (hereinafter referred to as FCC oil slurry) is an unconverted hydrocarbon with a boiling point > 350 ° C during the catalytic cracking process, which is rich in colloids and asphaltenes, and has the characteristics of high viscosity and high density. FCC oil slurry is mainly used as a blending component of heavy fuel oil, raw material for hydrocracking, production of carbon black, needle coke, and rubber and plastic processing aids. FCC oil slurry is rich in solid catalyst powder, and the ash content is relatively high, generally (0.2-0.9wt%). Catalyst powder will affect the quality of downstream products. For example, when used as carbon black and needle coke raw materials, the ash content must be <0.05wt%, and the premium product must be...

Claims

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Application Information

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IPC IPC(8): C10G33/02
Inventor 王振宇于丽徐振洪李本高吴晓东
Owner CHINA PETROLEUM & CHEM CORP
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