CN1680515A - Catalytic cracking micro-explosion activator - Google Patents
Catalytic cracking micro-explosion activator Download PDFInfo
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- CN1680515A CN1680515A CN 200410029976 CN200410029976A CN1680515A CN 1680515 A CN1680515 A CN 1680515A CN 200410029976 CN200410029976 CN 200410029976 CN 200410029976 A CN200410029976 A CN 200410029976A CN 1680515 A CN1680515 A CN 1680515A
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- catalytic cracking
- microexplosion
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- oil
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Abstract
A catalytic cracking microblasting activator is composed of surface activator, water, catalyst. The process is to mix the material in front of the lift pipe snoot, then to form the water-in-oil emulsion, next to initiate the microblasting with the catalyst. It can improve the yield of petrol + light diesel oil + liquid gas, the productive rate of propylene, ethane + propylene + butylenes and the content of the H2S. Also it can decrease the productive rate of charred coal, H2, hydrogen-methane and the content of the thiol.
Description
The present invention relates to a kind of catalytic cracking microexplosion activator, it belongs to the auxiliary agent that improves charging atomizing effect and deactivated catalyst in the refining of petroleum field in the catalytic cracking process.This auxiliary agent adds in the raw material before the catalytic cracking riser nozzle, water-in-oil microemulsion liquid with raw material formation nano level yardstick, after nozzle atomization, enter riser tube and contact the generation microexplosion with high temperature catalyst, reduce the size of atomizing droplet, improve atomizing effect, and generation has the hydrocarbon fragment of active hydrogen, improve catalyzed reaction, active element in the auxiliary agent is adsorbed onto on the catalyzer, play the effect of deactivated catalyst, reduce the coke productive rate to reach, improve the light liquid receipts, improve propene yield, reduce the purpose that gasoline flows pure content.
Catalytic cracking is the core process of refining of petroleum, and its benefit accounts for nearly 1/3rd of petrochemical complex total benefit.And riser reactor is the core of catalytic cracking process, and riser reactor charging atomizing effect directly influences product and distributes, and influenced by raw material heavy metal contamination, and catalyzer is poisoned easily, and catalyst selectivity is descended, and undesirable reaction increases.Bad and the catalyzer heavy metal contamination of charging atomizing effect is poisoned, and causes purpose product gasoline, diesel oil, yield of liquefied gas to descend, and coke productive rate, dry gas yied rise, and particularly hydrogen yield rises, and has a strong impact on quality product.Usually the way of improving riser reactor charging atomizing effect is to update nozzle, reduces the atomizing droplet diameter, but is subjected to material viscosity and mist steam rate, pressure influence, and the atomizing droplet diameter on average just reaches the limit of to 60 μ m.The common practices that reduces catalyzer heavy metal contamination is a filling passivator, but its passivation effect is limited, and different heavy metal contamination passivation effect difference is very big.
The purpose of this invention is to provide a kind of catalytic cracking microexplosion activator that improves the charging atomizing effect and reduce catalyzer heavy metal contamination.After this catalytic cracking microexplosion activator and catalytically cracked material mixed, under the effect of emulsifying agent and shearing force, water was evenly dispersed in the oil with the drop of 300～500 μ m, forms stable water-in-oil type emulsion.Emulsified feedstock is after topping-up pump carries out primary atomization by atomizing nozzle, contact with high temperature catalyst from revivifier, when oil droplet is heated, because the boiling point of water and oil differs bigger, therefore, water is vaporization earlier, and volume sharply expands, moment splits into the littler oil droplet of particle diameter wrapping in outside oil phase, and this process is referred to as " microexplosion ".The effect of " microexplosion " is to make more granular of oil droplet, has improved the surface active energy of oil droplet (500 μ m), thereby has quickened the volatilization of oil droplet.The surging force that explosion atomizing produces will produce positive influence to stock oil vaporization and gas phase, Liquid Phase by Catalytic cracking reaction.Molecule in gas and the liquid exists with the polymolecular state of aggregation, and this congregation has a negative impact to diffusion, the absorption of the vaporization of liquid and gas-liquid, and there are to a certain degree retardation in gas-solid, chemical reaction between liquid-solid.The surging force that explosion atomizing produces plays to a certain degree destruction to this state of aggregation, makes molecule aggregates generation depolymerization, reduces oil droplet size, improves the vaporization rate of stock oil, thereby improves the catalytic cracking reaction effect.Microexplosion is used for the catalytic cracking feed system, have following advantage: (1) can change atomizing type by " explosion ", improve the atomizing effect of charging greatly, promote the contact of raw material with catalyzer, (2) because the suitable rising agent oil ratio of the reduction of emulsified feedstock feeding temperature, both increased the contact frequency of reactant and catalyst activity component, and produced good product again and distributed.(3) heat-obtaining that can alleviate revivifier is loaded, and (4) reduce heat cracking reaction.The stock oil that has added this catalytic cracking microexplosion activator, when the oil gas temperature will be above the boiling point of microemulsified water-in-oil under that pressure, " microexplosion " that takes place rapidly made blob volume reduce by 2 orders of magnitude, and physical activity improves 2 orders of magnitude.
The stock oil that has added catalytic cracking microexplosion activator, under hot conditions, water molecules after the blast and red-hot raw material oil gas generation water-gas reaction generate the hydrocarbon fragment that contains a large amount of reactive hydrogens, increase carbonium ion and form speed, improve catalyzed reaction.
Added the stock oil of catalytic cracking microexplosion activator, activating element deposits on the catalyzer, plays the raising transformation efficiency, improves the effect of product selectivity, and reduces sulfur in gasoline alcohol content.The final catalytic cracking metal passivant that replaces.
Technical characterstic of the present invention is described as follows.
(1) uses state-of-the-art micro-emulsion technology, contain the aqueous solution of activating element with high-intensity high-molecular surface active material parcel, and make it to form the nanoscale water-in-oil, thoroughly solved the problem that the emulsified feedstock water droplet shifts to an earlier date the breakdown of emulsion explosion.
(2) the stock oil droplet that forms after the riser tube nozzle atomization contains the water-in-oil liquid particle of larger amt, and it is about 300 that average one 50 μ m droplet contains water-in-oil quantity.
(3) catalytic cracking microexplosion activator, itself is moisture, and can absorb institute moisture (about 200ppm) in the raw material.
(4) each particle is all surrounded by elasticity and all very high promoting agent film of intensity, and water in oil atmospheric boiling point＞100 ℃ are riser tube nozzle place boiling point＞200 ℃.
(5) according to the minisize liquid theory, the microexplosion process can increase the unstable of stock oil, makes its active raising.Follow " rapid phase transition " phenomenon, make more fierce that vapor explosion carries out, make particle water the moment of microsecond volume increase two orders of magnitude.This phenomenon will make the chemical stability of fuel oil change, and produce higher chemically reactive, and the association hydrogen production reaction.
(6) catalytic cracking microexplosion activator contains activating element and can be absorbed by catalyzer.
(7) after catalytic cracking microexplosion activator is filled in the stock oil, can stop the filling of passivator before the riser tube nozzle.
(8) this auxiliary agent is used for catalytic cracking unit, and normal temperature adds, and with using with adding, directly mixes with stock oil, and filling is convenient, and is nonflammable explosive, and device and equipment are not had corrosive nature.
(9) this auxiliary agent can directly be annotated, and also useable solvents is diluted afterwards to go in the fcc raw material oil pipeline with the metering infusion and mixed with raw material.Filling rate is 20-200ppm, can suitably adjust filling rate according to practical effect, and is best with the result of use of continuous this product of adding.
Experimental result of the present invention shows, after using catalytic cracking microexplosion activator, can improve 1 to 3 percentage point of gasoline+solar oil+yield of liquefied gas, reduce by 0.3 to 0.5 percentage point of coke productive rate, productivity of propylene increases by 1 percentage point, and hydrogen yield descends 0.1 to 0.2 percentage point, hydrogen methane is than obviously descending, ethene+propylene+total butylene productive rate rises 2 to 3 percentage points, and hydrogen sulfide content rises 35% in the dry gas, and sulfur in gasoline alcohol content descends 15%.
Claims (7)
1. catalytic cracking microexplosion activator, it is characterized in that this agent contains emulsifying agent, activating element and water, before the riser tube nozzle, inject stock oil, with the water-in-oil microemulsion liquid of raw material formation nanoscale, after high temperature catalyst contacts, produce microexplosion, improve atomizing effect, activating element is adsorbed onto on the catalyzer, has improved catalyst activity, reduces catalyst metal and pollutes.
2. catalytic cracking microexplosion activator according to claim 1, it is characterized in that adopting the high-performance tensio-active agent, the water-in-oil microemulsion liquid that forms with raw material is of a size of 300nm to 500nm, contain a large amount of water-in-oil microemulsion liquid in the droplet by nozzle atomization, it is about 300 that one 50 μ m droplet contains water-in-oil quantity.
3. catalytic cracking microexplosion activator according to claim 1, the moisture of the about 200ppm that it is characterized in that absorbing in the raw material and contained, and this part water formed water-in-oil microemulsion liquid.
4. catalytic cracking microexplosion activator according to claim 1 is characterized in that having produced the fragment that has reactive hydrogen in the microexplosion process, has quickened catalyzed reaction.
5. catalytic cracking microexplosion activator according to claim 1 is characterized in that the water-in-oil microemulsion liquid that forms boiling point＞100 ℃ under the pressure condition at nozzle place.
6. catalytic cracking microexplosion activator according to claim 1, it is characterized in that activating element can be adsorbed onto above the catalyzer, improved activity of such catalysts and selectivity, the cracking of olefins of gasoline fraction can have been become little alkene, and the sulphur in the raw material has been converted into hydrogen sulfide.
7. catalytic cracking microexplosion activator according to claim 1 is characterized in that replacing catalytic cracking passivator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410029976 CN1680515A (en) | 2004-04-08 | 2004-04-08 | Catalytic cracking micro-explosion activator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410029976 CN1680515A (en) | 2004-04-08 | 2004-04-08 | Catalytic cracking micro-explosion activator |
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| CN1680515A true CN1680515A (en) | 2005-10-12 |
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| CN 200410029976 Pending CN1680515A (en) | 2004-04-08 | 2004-04-08 | Catalytic cracking micro-explosion activator |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102453513A (en) * | 2010-10-22 | 2012-05-16 | 中国石油化工股份有限公司 | Method for reducing content of sulfur oxides in catalytic cracking flue gas |
| CN102453514A (en) * | 2010-10-22 | 2012-05-16 | 中国石油化工股份有限公司 | Method for reducing carbon dioxide emission in catalytic cracking flue gas |
| CN107557070A (en) * | 2016-06-30 | 2018-01-09 | 中国石油化工股份有限公司 | In a kind of reduction catalytic cracked dry gas hydrogen methane than method |
-
2004
- 2004-04-08 CN CN 200410029976 patent/CN1680515A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102453513A (en) * | 2010-10-22 | 2012-05-16 | 中国石油化工股份有限公司 | Method for reducing content of sulfur oxides in catalytic cracking flue gas |
| CN102453514A (en) * | 2010-10-22 | 2012-05-16 | 中国石油化工股份有限公司 | Method for reducing carbon dioxide emission in catalytic cracking flue gas |
| CN102453513B (en) * | 2010-10-22 | 2014-03-05 | 中国石油化工股份有限公司 | Method for reducing content of sulfur oxides in catalytic cracking smoke |
| CN102453514B (en) * | 2010-10-22 | 2014-03-05 | 中国石油化工股份有限公司 | Method for reducing emission of carbon dioxide in catalytic cracking flue gas |
| CN107557070A (en) * | 2016-06-30 | 2018-01-09 | 中国石油化工股份有限公司 | In a kind of reduction catalytic cracked dry gas hydrogen methane than method |
| CN107557070B (en) * | 2016-06-30 | 2020-05-12 | 中国石油化工股份有限公司 | Method for reducing hydrogen-methane ratio in catalytic cracking dry gas |
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