CN1958738A - Method for removing powder of catalyst from catalytic cracking oil slurry - Google Patents
Method for removing powder of catalyst from catalytic cracking oil slurry Download PDFInfo
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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
The present invention relates to the process for purification of hydrocarbon ils, exactly, is the method that removes catalyst fines in the catalytically cracked oil.
Background technology
Catalytically cracked oil (hereinafter to be referred as the FCC slurry oil) is in the catalytic cracking process, and the unconverted hydro carbons of boiling point＞350 ℃ wherein is rich in colloid, and bituminous matter has the viscosity height, the characteristics that density is big.The FCC slurry oil is mainly used in the blend component of heavy fuel oil (HFO), and hydrocracking raw material is produced carbon black, needle coke, and rubber and plastic processing aid.Be rich in the solid catalyst powder in the FCC slurry oil, ash content is higher, generally at (0.2-0.9wt%).Catalyst fines can have influence on the quality of derived product, and during for example as carbon black and needle-shape coke raw material, ash content is necessary＜0.05wt%, the top grade product are then wanted＜0.02wt%.In addition, the slurry oil that is rich in catalyst fines can quicken the wearing and tearing of nozzles when making the oil fuel component, can the blocking catalyst duct when making hydrocracking raw material, increase pressure drop.So must take measures, remove the solid catalyst powder in the FCC slurry oil.
The existing technology that removes comprises: natural subsidence, electrostatic separation, centrifugal separation etc. are filtered in the auxiliary agent sedimentation.Natural subsidence is the method for using the earliest, because the particle size range of catalyst fines is at 0-80 μ m, wherein the following particle diameter of 20 μ m accounts for suitable proportion, settling velocity is slow, and slurry oil viscosity is big, and colloid, bituminous matter have hindered the sedimentation of catalyst fines, even so elevated temperature, effect of settling is also undesirable.Filter, electrostatic separation, centrifugation is all very high to the requirement of equipment.Filtration unit requires the small-sized of filter opening, thereby is easy to stop up back flushing continually; Electrostatic separating device is because solid surface is wrapped up by oil and can not reach the ideal effect, and centrifugation is owing to the large batch of slurry oil of intractable, so do not have examples of industrial applications.At the shortcoming of natural subsidence, many bibliographical informations the interpolation auxiliary agent quicken settled method.Auxiliary agent is some surfactants normally, as: the polyacrylic affixture of alkylphenol-formaldehyde resin and alkoxyl group, unsaturated carbonic acid, alkyl benzene sulphonate (ABS) etc.Usp5.481.059 introduces vinylformic acid and resol alkoxylate affixture is made settling aids, and usp, 5.593.572 introduce with containing N, S, and heteroatomic aliphatic polymer such as O is made settling aids (molecular weight 10
3-10
6), usp, 5.681.451 introduces and makes auxiliary agent with the alkoxylated alkylphenol urea formaldehyde of molecular weight 1500-5000, and usp.6.316.685 introduces with containing polyvalent alcohol, and the unitary unsaturated carboxylic acid polymer of alkoxide alkyl phenolic resin is made settling aids.The auxiliary agent sedimentation can improve settled effect greatly and shorten the settling time, even yet like this, settling time also will be about 24 hours, even several days, and catalyst fines is enriched in the slurry oil of container bottom, also will remove catalyst fines and reclaim slurry oil through means such as filtration and centrifugations, these all have influence on treatment capacity and processing cost.
Summary of the invention
The invention provides a kind of method that removes catalyst fines in the catalytically cracked oil, this method can the deep removal catalyst fines.
Method provided by the invention comprises: the lightweight solvent oil is mixed with catalytically cracked oil, be made into the mixing oil of density less than water, the water that will contain emulsion splitter and flocculation agent mixes breakdown of emulsion respectively with mixing oil after the preheating, with enrichment the lower layer of water of catalyst fines tell, get final product.
In order to guarantee mixed effect, mix after water and catalytic cracking mixing oil are preheating to 95-100 ℃ respectively, at 90-140 ℃ of following heating demulsification type, or under the 2000-5000v/cm electric field action breakdown of emulsion.
In order to improve removal effect, can adopt second-stage treatment, the slurry oil that is about to after one-level is handled is handled once according to the method described above again.The water of separate discharging, through sedimentation, remove by filter suspension catalyst powder last, reusable.
Said lightweight solvent oil, can be boiling point be 100-200 ℃ can be miscible with the FCC slurry oil solvent oil.The alkane that comprises straight or branched is as heptane, octane, octane-iso; Aromatic hydrocarbons is as benzene,toluene,xylene; Lightweight fraction oil is as gasoline, kerosene.The consumption of lightweight solvent oil should make the density＜1g/cm of the mixing oil that is made into
3, the 5-60 that is generally the catalytic cracking weight of oil weighs %.
The consumption of water is the heavy % of the 5-30 of catalytically cracked oil weight, preferably the heavy % of 10-20.
The effect of emulsion splitter is that the water sepn in the mixture is come out, emulsion splitter can be alkoxylated alkylphenol urea formaldehyde, polyvalent alcohol polyoxyethylene polyoxypropylene block copolymer, polyethylene polyamine polyoxyethylene polyoxypropylene block copolymer and compound thereof, and all are applicable to the commercially available emulsion splitter of slurry oil breakdown of emulsion.The emulsion splitter dosage is the 10-500ppm of catalytically cracked oil slurry oil weight, preferably 20-100ppm.
Flocculation agent is inorganic or organic polymer, as polymerization silicate, poly-ferric chloride, polymerize aluminum chloride, Poly Dimethyl Diallyl Ammonium Chloride and multipolymer thereof, polyacrylamide, sodium polyacrylate, poly acrylic acid-poly acrylamide copolymer etc., and all are applicable to the settled commercially available flocculation agent of catalyst fines.The consumption of flocculation agent is the 10-1000ppm of catalytically cracked oil slurry oil weight, preferably 200-1000ppm.
Method provided by the invention is to be made into mixing oil with lightweight solvent oil and slurry oil, with the water that contains emulsion splitter and flocculation agent, the catalyst fines in the slurry oil is washed in the water again.Add the lightweight solvent oil and reduce the density of slurry oil on the one hand, mixing oil viscosity also greatly reduces on the other hand, and these all help removing of catalyst fines, makes to take off the back ash content and reach requirement.
The catalyst fines that both can be used to remove proportion less than 1 slurry oil of the present invention also can be used for removing proportion greater than the catalyst fines in 1 the slurry oil, and added lightweight solvent oil can reclaim the back by the distillatory method and reuse.
Embodiment
Removal effect among the embodiment assigns to estimate with ash, and the measuring method of ash content is seen GB508-65, get at every turn take off before slurry oil contrast the calculating of decreasing ratio.
Embodiment 1:
The character of the slurry oil of handling sees Table 1.
The character of table 1 catalytically cracked oil
| Project | Numerical value | |
| Density (g/cm 3)，(20℃) | 1.0490 | |
| Viscosity (mm 2/s) | 80℃ | 170.9 |
| 100℃ | 53.53 | |
| Stable hydrocarbon | 29.4％ | |
| Aromatic hydrocarbons | 46.0％ | |
| Colloid | 18.8％ | |
| Bituminous matter | 5.8％ | |
| Ash content | 0.336％ | |
| Condensation point | +12℃ | |
| Carbon residue | 14.6％ | |
The preparation of mixing oil: get kerosene 64g and mix with FCC slurry oil 96g and be made into mixing oil, get 1 heavy % flocculation agent (polyacrylamide) and be made into the aqueous solution with 0.8g emulsion splitter (FC9301) and 15.2g water, get this kind aqueous solution and miscella preheating to 95 ℃, click mixing 50 times at juice extractor, place the breakdown of emulsion instrument, added electric field 2000v/cm.Left standstill branch water 1 hour, and extracted lower layer of water out, get and take off back oil and stir evenly the survey ash content.Test-results sees Table 2, and as can be seen from the test results, when making solvent oil with kerosene, the flocculation agent dosage is that the decreasing ratio of 400ppm reaches 98.1%, continues to increase flocculant concentration, and decreasing ratio increases not obvious.
The removal effect of the different flocculation agent dosages of table 2
| The amount of flocculation agent (ppm) | Ash content (heavy %) | Decreasing ratio (%) |
| 100 | 0.0061 | 95.1 |
| 400 | 0.0024 | 98.1 |
| 700 | 0.0028 | 97.7 |
| Before taking off | 0.1239 |
Embodiment 2:
The character of slurry oil sees Table 1.With the heptane is solvent oil and FCC slurry oil mixed configuration mixing oil.Getting heptane 42g mixes with FCC slurry oil 118g and is made into mixing oil, get 6.4g flocculation agent (polyacrylamide, concentration 1 heavy %) with 0.8g emulsion splitter (FC9301, concentration 2 heavy %) be made into the aqueous solution with 24.8g water, get this kind aqueous solution and miscella preheating to 95 ℃, click mixing 50 times at juice extractor, place the breakdown of emulsion instrument, added electric field 2000v/cm.Left standstill branch water 1 hour, and extracted lower layer of water out, get and take off back oil and stir evenly the survey ash content.Test-results sees Table 3, finds out from test-results, and heptane has removal effect preferably as solvent oil, and decreasing ratio reaches 97.3%.
Table 3 is the removal effect of solvent with the heptane
| Ash content (heavy %) | Decreasing ratio (%) | |
| Before taking off | 0.2832 | |
| After taking off | 0.0077 | 97.3 |
Embodiment 3:
The character of slurry oil sees Table 1.With toluene is solvent oil and FCC slurry oil mixed configuration mixing oil.Getting toluene 77.7g mixes with FCC slurry oil 82.2g and is made into mixing oil, get 6.4g flocculation agent (polyacrylamide, concentration 1 heavy %) with 0.8g emulsion splitter (FC9301, concentration 2 heavy %) be made into the aqueous solution with 24.8g water, get this kind aqueous solution and miscella preheating to 95 ℃, click mixing 50 times at juice extractor, place the breakdown of emulsion instrument, added electric field 2000v/cm.Left standstill branch water 1 hour, and extracted lower layer of water out, get and take off back oil and stir evenly the survey ash content.Test-results sees Table 4, finds out from the result, and toluene is that the decreasing ratio of solvent oil is 98.6%.
Table 4 is the removal effect of solvent with toluene
| Ash content (heavy %) | Decreasing ratio (%) | |
| Before taking off | 0.171 | |
| After taking off | 0.0024 | 98.6 |
Embodiment 4:
The character of slurry oil sees Table 1.Getting kerosene 64g mixes with FCC slurry oil 96g and is made into mixing oil.Get 6.4g flocculation agent (polyacrylamide, concentration 1 heavy %) and be made into the aqueous solution, flocculation agent dosage 400ppm with 24.8g water with 0.8g emulsion splitter (FC9301, concentration 2 heavy %).Get this kind aqueous solution and miscella preheating to 95 ℃, click at juice extractor and mix 50 times, place the pressurized vessel heating demulsification type, take out after 2 hours, extract lower layer of water out, get the slurry oil survey ash content that stirs.Test-results sees Table 5, finds out from test-results, and under same temperature, hot breakdown of emulsion is low than the decreasing ratio of added electric field breakdown of emulsion, and along with temperature raises, the effect of oily water separation improves, and decreasing ratio improves, and 125 ℃ decreasing ratio is 97.8%.
The removal effect of the different settling temperature of table 5
| The breakdown of emulsion temperature (℃) | Ash content (heavy %) | Decreasing ratio (%) |
| 95 | 0.0059 | 95.2 |
| 125 | 0.0027 | 97.8 |
| Before taking off | 0.1239 |
Comparative Examples:
Get the 100g slurry oil and place test tube, left standstill 24 hours in 95 ℃, get upper strata 50g and the 50g of lower floor slurry oil and survey ash content.Test-results sees Table 6, finds out from test-results, and the decreasing ratio of natural subsidence is lower, has only 18.4%.
The catalyst removal effect of table 6 standing sedimentation
| Ash content (heavy %) | Decreasing ratio (%) | |
| Upper strata (50%) | 0.2773 | 16.5 |
| Lower floor's (50%) | 0.2708 | 18.4 |
| Before taking off | 0.332 |
Claims (9)
1. method that removes catalyst fines in the catalytically cracked oil, comprise: the lightweight solvent oil is mixed with catalytically cracked oil, be made into the mixing oil of density less than water, the water that will contain emulsion splitter and flocculation agent mixes after the preheating respectively with mixing oil, breakdown of emulsion, with enrichment the lower layer of water of catalyst fines tell, said lightweight solvent oil be boiling point be 100-200 ℃ can be miscible with catalytically cracked oil solvent oil, the water yield is the heavy % of the 5-30 of catalytically cracked oil weight, the emulsion splitter consumption is the 10-500ppm of the weight of slurry oil, and the consumption of flocculation agent is the 10-1000ppm of slurry oil weight.
2. in accordance with the method for claim 1, it is characterized in that water and mixing oil are preheating to 95-100 ℃ respectively, mix the back at 90-140 ℃ of following heating demulsification type, or under the 2000-5000v/cm electric field breakdown of emulsion.
3. in accordance with the method for claim 1, it is characterized in that the alkane that said lightweight solvent oil is a straight or branched, aromatic hydrocarbons or lightweight fraction oil.
4. according to claim 1 or 3 described methods, it is characterized in that said lightweight solvent oil is selected from one or more in heptane, octane, octane-iso, benzene,toluene,xylene, gasoline, the kerosene.
5. in accordance with the method for claim 1, it is characterized in that the water yield is the heavy % of the 10-20 of catalytically cracked oil weight.
6. in accordance with the method for claim 1, it is characterized in that emulsion splitter is alkoxylated alkylphenol urea formaldehyde, polyvalent alcohol polyoxyethylene polyoxypropylene block copolymer, polyethylene polyamine polyoxyethylene polyoxypropylene block copolymer or its compound.
7. in accordance with the method for claim 1, it is characterized in that the emulsion splitter consumption is the 20-100ppm of catalytically cracked oil weight.
8. in accordance with the method for claim 1, it is characterized in that flocculation agent is polymerization silicate, poly-ferric chloride, polymerize aluminum chloride, Poly Dimethyl Diallyl Ammonium Chloride, polyacrylamide, sodium polyacrylate, or acrylic acid-acrylamide copolymer.
9. in accordance with the method for claim 1, it is characterized in that the consumption of flocculation agent is the 200-1000ppm of catalytically cracked oil weight.
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| CN102417825A (en) * | 2011-10-17 | 2012-04-18 | 中国石油天然气股份有限公司 | Ground crude oil treating agent and using method thereof |
| CN102585895A (en) * | 2012-03-14 | 2012-07-18 | 李志英 | Separation method for solid particles in catalytic slurry oil |
| WO2014140865A3 (en) * | 2013-03-15 | 2014-12-04 | Sundance Services International Limited | System and method for cleaning and recovery of hydrocarbons |
| CN106318440A (en) * | 2016-09-21 | 2017-01-11 | 连云港爱华能源科技发展有限公司 | Catalyzing and cracking slurry oil settling agent and preparation method and application thereof |
| CN107903940A (en) * | 2017-12-20 | 2018-04-13 | 中石油燃料油有限责任公司研究院 | A kind of catalytic cracked oil pulp removal method of catalyst and system |
| CN109207193A (en) * | 2018-10-30 | 2019-01-15 | 中国石油大学(华东) | A kind of catalytic cracked oil pulp purification method |
| CN109233902A (en) * | 2018-11-08 | 2019-01-18 | 黑龙江省能源环境研究院 | A kind of method of catalyst fines in removing catalytic slurry |
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| CN110093181A (en) * | 2018-01-29 | 2019-08-06 | 湖南长岭石化科技开发有限公司 | Catalytic cracked oil pulp takes off solid method |
| CN110747006A (en) * | 2019-11-27 | 2020-02-04 | 北京奥博斯工程技术有限公司 | Method for removing solid impurities in catalytic oil slurry |
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| CN102417825B (en) * | 2011-10-17 | 2013-12-04 | 中国石油天然气股份有限公司 | Ground crude oil treating agent and using method thereof |
| CN102585895A (en) * | 2012-03-14 | 2012-07-18 | 李志英 | Separation method for solid particles in catalytic slurry oil |
| CN102585895B (en) * | 2012-03-14 | 2014-06-18 | 李志英 | Separation method for solid particles in catalytic slurry oil |
| WO2014140865A3 (en) * | 2013-03-15 | 2014-12-04 | Sundance Services International Limited | System and method for cleaning and recovery of hydrocarbons |
| CN106318440A (en) * | 2016-09-21 | 2017-01-11 | 连云港爱华能源科技发展有限公司 | Catalyzing and cracking slurry oil settling agent and preparation method and application thereof |
| CN107903940A (en) * | 2017-12-20 | 2018-04-13 | 中石油燃料油有限责任公司研究院 | A kind of catalytic cracked oil pulp removal method of catalyst and system |
| CN110093187B (en) * | 2018-01-29 | 2021-04-09 | 中国石油化工股份有限公司 | Method for combined processing of catalytic cracking slurry oil |
| CN110093187A (en) * | 2018-01-29 | 2019-08-06 | 中国石油化工股份有限公司 | The method of catalytic cracked oil pulp Combined machining |
| CN110093186A (en) * | 2018-01-29 | 2019-08-06 | 中国石油化工股份有限公司 | The method of catalytic cracked oil pulp Combined machining |
| CN110093181A (en) * | 2018-01-29 | 2019-08-06 | 湖南长岭石化科技开发有限公司 | Catalytic cracked oil pulp takes off solid method |
| CN110093181B (en) * | 2018-01-29 | 2021-06-04 | 湖南长岭石化科技开发有限公司 | Method for removing solid from catalytic cracking oil slurry |
| CN110093186B (en) * | 2018-01-29 | 2021-04-09 | 中国石油化工股份有限公司 | Method for combined processing of catalytic cracking slurry oil |
| CN109207193A (en) * | 2018-10-30 | 2019-01-15 | 中国石油大学(华东) | A kind of catalytic cracked oil pulp purification method |
| CN109233902A (en) * | 2018-11-08 | 2019-01-18 | 黑龙江省能源环境研究院 | A kind of method of catalyst fines in removing catalytic slurry |
| CN110747006A (en) * | 2019-11-27 | 2020-02-04 | 北京奥博斯工程技术有限公司 | Method for removing solid impurities in catalytic oil slurry |
| CN111410984A (en) * | 2020-04-13 | 2020-07-14 | 广东石油化工学院 | Method for graded extraction of FCC (fluid catalytic cracking) oil slurry solid content |
| CN111621322A (en) * | 2020-06-19 | 2020-09-04 | 金浦新材料股份有限公司 | Oil slurry settling agent and preparation method and application thereof |
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