CN103923690A - Method for extracting FCC oil slurry aromatic hydrocarbons - Google Patents
Method for extracting FCC oil slurry aromatic hydrocarbons Download PDFInfo
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- CN103923690A CN103923690A CN201310011028.0A CN201310011028A CN103923690A CN 103923690 A CN103923690 A CN 103923690A CN 201310011028 A CN201310011028 A CN 201310011028A CN 103923690 A CN103923690 A CN 103923690A
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Abstract
The present invention relates to a method for extracting FCC oil slurry aromatic hydrocarbons. The method comprises that: 90% by mass of furfural and 10% by mass of dimethyl sulfoxide are adopted as a continuous phase in a pulse filler extraction tower, a FCC oil slurry is adopted as a disperse phase, and extraction separation is performed at a temperature of 60 DEG C according to a catalyst/oil mass ratio of 2:1-3:1, wherein the extracted phase is obtained from the bottom of the tower, and the raffinate phase is obtained from the top of the tower; and the extracted phase and the raffinate phase respectively enter a pressure reduced rectification tower, solvent recovery is performed under a pressure of 26.66 KPa at a tower bottom temperature of 121.8 DEG C according to a reflux body mass ratio of 1:1, and the recovered two solvents return to the inlet of the extraction tower so as to be recycled. According to the present invention, the aromatic hydrocarbon content in the extracted oil (gum and asphaltene are removed) obtained after extraction is more than 90%, the saturated hydrocarbon content of the raffinate oil is less than 10%, and the characteristic indexes of the oil product of the present invention are superior to the characteristic indexes of the oil product extracted with pure furfural; and the method has characteristics of simple process, simple equipment, simple operation, mild process conditions, low power consumption, wide application rang and easy large-scale industrial production.
Description
Technical field
The present invention relates to a kind of method that extracts catalytic slurry aromatic hydrocarbons.
Background technology
Domestic catalytic slurry generally dispatches from the factory as cheap heavy fuel oil (HFO) at present.Because this series products belongs to nonstandard product, not further processing, just sells as coarse raw materials in addition.The one, sale economic benefit is low, and the 2nd, major part is full of in market as low grade products, and regular standard oil production marketing is had a negative impact.In recent years, to catalytic slurry character and rationally utilize technology to carry out large quantity research, relate generally to catalytic slurry and oil refining process are combined rationally to utilize catalytic slurry, or according to the feature on the composition of catalytic slurry, carry out the technical study that utilizes of production chemical product, to obtain catalytic slurry high value-added product, determine slurry oil deep processing scheme.Owing to containing the stable hydrocarbon of massfraction 30% ~ 50% in slurry oil, this part stable hydrocarbon is again the catalytically cracked material of high-quality; Simultaneously the aromatic hydrocarbons massfraction in slurry oil reaches more than 50%, and aromatic hydrocarbons is a kind of extremely valuable Chemicals, the further higher product of deep processing production added value, and end-use is extensive, and market outlook are wide.Therefore as cheap heavy fuel oil (HFO), to burn be very unfortunate to catalytic slurry, carry out the applied research of this class nonstandard product, formulate comprehensive processing and utilization process program, can improve the economic worth of this class resource, will bring good economic benefit to oil refining enterprise.
Stable hydrocarbon in catalytic cracking (FCC) externally extracting oil (the following naphthenic hydrocarbon of three rings accounts for the more than 70% of saturated hydrocarbon content) has good Catalytic Cracking Performance and can be used as the marine fuel oil that FCC raw material also can be used to production high added value; Aromatic hydrocarbon can be used as the raw material of chemical products with high added-value such as producing high aromatic rubber oil, needle coke, softening agent.At present, FCC slurry oil treatment technology mainly contains the isolation technique such as hydrotreatment, solvent deasphalting, delayed coking, solvent treatment both at home and abroad.From applicable cases both domestic and external, solvent treatment technology is the simplest, less investment, high efficiency.
Solvent treatment technology utilization solvent has stronger dissolving power to heavy arene, resin and asphalt, makes the alkane in slurry oil be able to separated with heavy condensed-nuclei aromatics.Solvent treatment technique solvent used mainly contains furfural, phenol, solvent pairs, N-Methyl pyrrolidone (NMP) etc. both at home and abroad at present.External solvent treatment technology is mainly used in the production of lubricating oil, and new device mostly adopts nmp solvent refining.At America & Canada, enter after the nineties, furfural treatment share drops to 30% by 40%, and phenol treating drops to by 28% that 10%, NMP is refining rises to 56%, has replaced furfural and phenol treating, occupies first place.In China, furfural treatment is solvent-refined major way, accounts for 75.8% of all solvent refining units, accounts for 80.3% of throughput.
But current solvent treatment technique often adopts single solvent to extract, after evidence single solvent extraction, obtain extracting oily aromaticity content out and can reach 80%, and the oily aromaticity content of the extraction that adopts complex solvent extraction to obtain can be up to 90%, therefore the effect of single solvent extraction is not as the effect of extracting of complex solvent, and complex solvent is more suitable for the refining of mink cell focus.The selectivity of complex solvent is high, better by the treated oil quality of the refining FCC slurry oil of complex solvent, yield is high, can be used as FCC raw material and marine fuel oil.Extract in oil enrichment out a large amount of condensed-nuclei aromaticss (>80%), can be used as the raw material of chemical products with high added-value such as producing high aromatic rubber oil, needle coke, softening agent, there is good economic benefit.
Summary of the invention
Object of the present invention is just to provide a kind of method that extracts catalytically cracked oil aromatic hydrocarbons; Under suitable temperature, agent-oil ratio, adopt the method for multi-stage counter current extraction, selection has strong dissolving power to heavy arene, resin and asphalt, the composite extraction agent refining catalytic slurry oil that selectivity coefficient is high, the extraction oil of production enrichment heavy arene, make its aromaticity content up to 90%, reach the requirement of high aromatic rubber oil.Solvent is carried out to recycle and reuse simultaneously.
A kind of method that extracts catalytically cracked oil aromatic hydrocarbons of the present invention; Comprise two parts:
First, the complex solvent (dimethyl sulfoxide (DMSO) of 90% furfural+10%) of take in Pulsed Packed Extraction Column is external phase, catalytic slurry is disperse phase in 60 ℃, agent oil quality than carrying out extracting and separating under 2:1～3:1 condition, obtains extract phase at the bottom of tower, and tower top obtains taking out remaining phase.
Secondly, extract phase, entering respectively mutually rectification under vacuum tower more than taking out, is 26.66KPa at pressure, and reflux mass ratio is 1:1, column bottom temperature is under the condition of 121.8 ℃, to carry out the recovery of solvent, and the entrance that two strands of solvents of recovery are all back to extraction tower recycles.Obtaining extracting out oil, to remove saturated minute quality after gum asphalt be that 7%(is lower than 10%), fragrance minute quality is up to 92%, and extracting oily yield out is 43.6%, and the character such as flash-point, density, viscosity require to meet the requirement of high aromatic rubber oil; The saturated minute quality of raffinating oil obtaining is 72%, and fragrance minute quality is 25%, and the yield of raffinating oil is 56.4%, and character meets the requirement of residual fuel oil peculiar to vessel.
Technical process of the present invention, equipment are simple, easy and simple to handle, and processing condition relax, and energy consumption is low, and subject range is wide, is easy to large-scale industrial production.Utilize technique of the present invention and device can make to extract out the aromaticity content >90% of oil (removing colloid, bituminous matter), the saturated hydrocarbon content <10% raffinating oil, oil property is better than pure furfural extraction, solvent consumption <1%.
Embodiment
Embodiment 1
1) heat pre-treatment: catalytically cracked oil and composite extraction agent are heated to 60 ℃ simultaneously;
2) composite extraction agent is squeezed in Pulsed Packed Extraction Column with impeller pump, when extraction agent liquid level is to after between tower top overflow port and opening for feed, adjust flux, now also discharging flow at the bottom of adjusting tower, makes liquid level stabilizing between overflow port and opening for feed.
3) open light phase pump, enter extraction tower at the bottom of making catalytic slurry by tower, regulate the flow of catalytic slurry, make to carry out multi-stage counter current extraction between the agent-oil ratio 2:1～3:1 of itself and extraction agent.
4) solvent recuperation: extract phase, enter respectively mutually rectification under vacuum tower more than taking out, at pressure, be 26.66KPa, reflux ratio is 1:1, and column bottom temperature is under the condition of 121.8 ℃, to carry out vacuum flashing to reclaim solvent, and two strands of solvents of recovery all return to extraction tower and recycle.
Claims (1)
1. a method that extracts catalytic slurry aromatic hydrocarbons, is characterized in that:
First, the dimethyl sulfoxide (DMSO) that the quality of take in Pulsed Packed Extraction Column is 90% furfural and 10% is external phase, and catalytic slurry is disperse phase in 60 ℃, agent oil quality than carrying out extracting and separating under 2:1～3:1 condition, obtains extract phase at the bottom of tower, and tower top obtains taking out remaining phase;
Secondly, extract phase, entering respectively mutually rectification under vacuum tower more than taking out, is 26.66KPa at pressure, and reflux mass ratio is 1:1, column bottom temperature is under the condition of 121.8 ℃, to carry out the recovery of solvent, and the entrance that two strands of solvents of recovery are all back to extraction tower recycles.
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| CN201310011028.0A CN103923690B (en) | 2013-01-11 | 2013-01-11 | A kind of method extracting catalytic slurry aromatic hydrocarbons |
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| CN201310011028.0A CN103923690B (en) | 2013-01-11 | 2013-01-11 | A kind of method extracting catalytic slurry aromatic hydrocarbons |
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| CN103923690A true CN103923690A (en) | 2014-07-16 |
| CN103923690B CN103923690B (en) | 2016-06-08 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109161378A (en) * | 2018-08-29 | 2019-01-08 | 中国海洋石油集团有限公司 | The method and the carbon adhesive of carbon adhesive are prepared using catalytic slurry |
| CN112011363A (en) * | 2020-08-23 | 2020-12-01 | 吴志学 | Method for producing high-quality mesophase pitch raw material by circularly extracting heavy oil product |
| CN112521973A (en) * | 2020-11-03 | 2021-03-19 | 中国石油化工股份有限公司 | Method for continuously extracting catalytic slurry oil from furfural |
| CN112521974A (en) * | 2020-11-03 | 2021-03-19 | 中国石油化工股份有限公司 | Method for intermittently extracting catalytic slurry oil from furfural |
| CN112812802A (en) * | 2021-01-13 | 2021-05-18 | 中国石油大学(华东) | Continuous process for preparing mesophase pitch by refining raw oil |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101870886A (en) * | 2010-06-07 | 2010-10-27 | 中国石油大学(华东) | Production method of environment-friendly rubber oil |
| CN101906317A (en) * | 2010-08-09 | 2010-12-08 | 华中科技大学 | Method for preparing environment-friendly aromatic oil from catalytic cracking slurry oil |
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2013
- 2013-01-11 CN CN201310011028.0A patent/CN103923690B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101870886A (en) * | 2010-06-07 | 2010-10-27 | 中国石油大学(华东) | Production method of environment-friendly rubber oil |
| CN101906317A (en) * | 2010-08-09 | 2010-12-08 | 华中科技大学 | Method for preparing environment-friendly aromatic oil from catalytic cracking slurry oil |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109161378A (en) * | 2018-08-29 | 2019-01-08 | 中国海洋石油集团有限公司 | The method and the carbon adhesive of carbon adhesive are prepared using catalytic slurry |
| CN112011363A (en) * | 2020-08-23 | 2020-12-01 | 吴志学 | Method for producing high-quality mesophase pitch raw material by circularly extracting heavy oil product |
| CN112521973A (en) * | 2020-11-03 | 2021-03-19 | 中国石油化工股份有限公司 | Method for continuously extracting catalytic slurry oil from furfural |
| CN112521974A (en) * | 2020-11-03 | 2021-03-19 | 中国石油化工股份有限公司 | Method for intermittently extracting catalytic slurry oil from furfural |
| CN112812802A (en) * | 2021-01-13 | 2021-05-18 | 中国石油大学(华东) | Continuous process for preparing mesophase pitch by refining raw oil |
| CN112812802B (en) * | 2021-01-13 | 2022-04-15 | 中国石油大学(华东) | Continuous process for preparing mesophase pitch by refining raw oil |
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| CN103923690B (en) | 2016-06-08 |
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