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Method for removing powder of catalyst in catalytic cracking oil slurry

A technology for catalytic cracking oil slurry and catalyst, which is applied in the direction of electricity/magnetic dehydration/demulsification, water treatment and refining, etc. Effect

Active Publication Date: 2007-05-09
CHINA PETROLEUM & CHEM CORP
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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 needs to be filtered and centrifuged. means to remove catalyst fines and recover oil slurry, all of which affect the treatment capacity and treatment cost

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

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Comparison scheme
Effect test

Embodiment 1

[0021] The properties of the treated oil slurry A are shown in Table 1. The amount of flocculant added is 1000ppm, and the amount of demulsifier (FC9301) added is 100ppm. The specific method is as follows: add 0.8g of demulsifier (concentration: 2% by weight) to 15.2g of water, and mix it with 16g of flocculant (concentration: 1% by weight) to prepare After the solution is preheated to 95°C, mix it with 160g oil slurry preheated to 100°C, click and mix it 50 times with a juicer, pour it into a test tube, apply an electric field in the demulsifier, let it stand still to break the emulsion and separate the water. The electric field strength is 2000v / cm, take it out after 1 hour, pump out the lower layer of water, take the oil slurry and stir it evenly to measure the ash content. The test results are shown in Table 2. The removal effect of polyacrylamide is the best. The ash content of the oil slurry after removal is 0.01%, and the removal rate is 95.2%.

[0022] projec...

Embodiment 2

[0025] The properties of the treated oil slurry A are shown in Table 1. Adopt the method of thermal demulsification without electric field, polyacrylamide is selected as the flocculant, and the addition amount is 1000ppm, and the addition amount of demulsifier (FC9301) is 100ppm. The specific method is as follows: add 0.8g demulsifier (concentration: 2 wt.%) , and mixed with 16g flocculant (polyacrylamide, 1% concentration by weight) to form a solution, preheated to 95°C, mixed with 160g oil slurry preheated to 100°C, and clicked and mixed 50 times with a juice extractor, Put it in a pressure vessel and heat it to break the emulsion, take it out after 2 hours, pump out the water in the lower layer, take the oil slurry and stir it evenly to measure the ash content. The test results are shown in Table 3. Under the same temperature conditions, the effect of removing catalyst powder by thermal demulsification is worse than that of applying an electric field, and the removal rate a...

Embodiment 3

[0028] The properties of the treated oil slurry B are shown in Table 4. Use sucrose to increase the specific gravity of water, add 1000ppm of flocculant, and add 100ppm of demulsifier (FC9301), the specific method is as follows: get 6.4g sucrose and add 15.2g of water, add 0.8g demulsifier (concentration 2% by weight), and Mix 16g flocculant (concentration 1% by weight) to form a solution, preheat to 95°C, mix with 160g oil slurry preheated to 100°C, click and mix 50 times with a juicer, pour it into a test tube for demulsification Add an electric field to the instrument, stand still to break the emulsion and separate the water, the electric field strength is 2000v / cm, take it out after 1 hour, pump out the lower layer of water, take the oil slurry and stir it evenly to measure the ash content. The test results are shown in Table 5. It can be seen from the data in the table that polyacrylamide has the best effect, the removal rate reaches 87.4%, and the ash content of the oil ...

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Abstract

This invention provides two methods for removing catalyst powder from catalytic cracking oil slurry. The first method is suitable for light oil slurry whose specific gravity is lower than water, and comprises: mixing water containing demulsifier and flocculant with catalytic cracking oil slurry, demulsifying and removing the lower layer of water enriched in catalyst powder. The second method is suitable for heavy oil slurry whose specific gravity is higher than water, and comprises: adding weak electrolyte or non-electrolyte that can be dissolved in water and has higher specific gravity into water, such as ammonium acetate, ammonium citrate, fructose, glucose, sucrose, sorbitol or xylitol. The two methods have such advantages as short removing time and high 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 (FCC oil slurry for short) 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 <0.02wt%. In a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G31/08C10G33/02
Inventor 王振宇于丽徐振洪李本高吴晓东
Owner CHINA PETROLEUM & CHEM CORP
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