CN104492472B - A kind of fluid catalytic cracking catalyst aid with low coke yield and preparation method - Google Patents
A kind of fluid catalytic cracking catalyst aid with low coke yield and preparation method Download PDFInfo
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Abstract
The invention discloses a kind of catalytic cracking catalyst aid that can reduce coke yield and preparation method thereof, its catalytic cracking catalyst aid is by introducing the former powder of SBA 15 containing template of magnesium salt or individually preparing through spray drying forming and roasting containing after the former powder of SBA 15 of template, substrate, binding agent and water making beating.After roasting, the catalyst aid of gained contains 62～30 wt% substrate and 35～25 wt% binding agents, the magnesium oxide of 3 30 wt%SBA 15 and 0 ~ 15 wt%.The catalytic cracking catalyst aid that the present invention provides, has the heavy oil conversion performance of excellence, and while the yield of gasoline and diesel oil significantly improves, the yield of coke and dry gas the most substantially reduces.
Description
Technical field
The present invention relates to catalyst, a kind of catalytic cracking catalyst aid that can reduce coke yield and preparation method and application, this is urged
Change cracking additive and be applicable to the catalyzed cracking processing containing heavy distillate raw material, reduce coke yield and promote the yield of petrol and diesel oil component simultaneously.
Background technology
Increasingly exhausted along with world wide light petroleum resource, the trend of world's crude oil heaviness make refinery to heavy oil residue is converted into lightweight,
The hope of high priced line grows to even greater heights.Fluid catalytic cracking (FCC) is to make one of most effective, most economical method of heavy charge lighting.To catalysis
For cracking process, along with the ratio of FCC apparatus raw material incorporation residual oil increases day by day, raw material carbon residue raises, and easily forms Jiao in course of reaction
Charcoal；A large amount of generations of coke, produce serious influence to catalytic cracking reaction, and first, coke covers catalyst active center, makes catalyst fast
Speed inactivation；Secondly, coke yield improves, and improves catalytic cracking unit regeneration load, on the one hand, regenerate at higher temperature, cause catalyst
More serious destruction, on the other hand, is limited by device thermal balance, is reduced unit capacity；Finally, due to a large amount of generations of coke, cause height
It is worth purpose product yield to decrease, hence it is evident that have impact on the economic benefit of device.Reduce the coke yield during FCC, be that oil refining industry is universal
One of key problem paid close attention to.
Reducing CO2 emission is the common recognition that countries in the world government reaches, and the Chinese government promises to undertake that the year two thousand twenty per GDP carbon emission reduces by 40%.
The CO2 emission of petroleum refining industry of U.S. generation in 2002 accounts for American industry in the same year and produces the 20% of CO2 emission total amount according to statistics, and is catalyzed
The CO2 emission that cracking produces occupies the first place of petroleum refining industry, accounts for the 15～20% of refinery's CO2 emission, up to 30%.Therefore,
Reduce refinery's CO2 emission it is first necessary to reduce catalytic cracking CO2 emission.Catalytic cracking CO2 emission mainly regenerates at catalyst
Burning process produces, therefore, reduces catalytic cracking CO2 emission and must reduce the coke yield of catalytic cracking.
In sum, reduce catalytic cracking coke yield and do not only have huge economic benefit, and there is great social benefit.
For solving problems, due to economic dispatch reason, the catalyst technology that can reduce coke yield is used to become primary study direction.Fall at present
The research contents of low coke yield is concentrated mainly on semi-synthetic catalyst as main study subject, processes NaY molecular sieve and preparation tool by super stabilizing
The most acid and pore size distribution carrier technique is had to realize.
Summary of the invention
It is an object of the invention to provide a kind of catalytic cracking catalyst aid that can effectively reduce coke yield and preparation method and application, this catalytic cracking
Catalyst aid is applicable to the catalyzed cracking processing containing heavy distillate raw material, reduces coke yield and promotes the yield of petrol and diesel oil component simultaneously.
The concrete technical scheme realizing the object of the invention is:
A kind of fluid catalytic cracking catalyst aid with low coke yield, feature is: this catalyst aid is by the former powder of the SBA-15 containing template or draws
Entering the former powder of the SBA-15 containing template of magnesium salt, binding agent and substrate composition, preparation process includes former for the SBA-15 containing template powder or introduces magnesium
The former powder of SBA-15 containing template of salt, binding agent and substrate mixing, ageing, spray shaping and roasting, finally give described microspheroidal fluidisation and urge
Change cracking catalysis auxiliary agent.
The composition of described catalyst aid is following (on the basis of catalyst aid gross weight): the former powder of SBA-15 containing template is (with contained SiO2Meter)
Being 3～30wt%, catalyst aid substrate is 30～62wt%, and binding agent is 25～35wt%, and magnesium oxide is 0～15wt%.
A kind of preparation method of above-mentioned catalyst aid, the method includes step in detail below:
The first step: the former powder of SBA-15 containing template according to document preparation is directly used in second step, or magnesium salt is introduced the SBA-15 containing template
Being applied to second step after in duct, wherein, magnesium salt consumption (in terms of magnesium oxide) accounts for the 0 or 1～15wt% of catalyst aid gross weight；Magnesium salt draws
Entering method is infusion process or solid-phase sequencing, and magnesium salt is magnesium acetate, magnesium chloride, magnesium nitrate or their mixture；
Second step: by the former powder of the SBA-15 containing template introducing magnesium salt prepared by the first step or individually the former powder of SBA-15 containing template and
Water is mixed to get serosity A；Wherein, the former powder of SBA-15 containing template is (with contained SiO2Meter) consumption accounts for the 3～30wt% of catalyst aid gross weight；
3rd step: after substrate and water mix homogeneously, obtains serosity B, and wherein substrates quantity accounts for the 62～30wt% of catalyst aid gross weight；
4th step: mixed by serosity A and serosity B, adds boehmite, adds appropriate phosphoric acid, by boehmite and phosphatase reaction
Generating binding agent aluminum phosphate, both consumptions that adds measure ratio close to chemical reaction, and binding agent accounts for the 35～25wt% of catalyst aid gross weight, dropping
Dilute acid for adjusting pH value is to 2～3 more aged, after spray shaping, roasting 2～6h at 450～600 DEG C in air atmosphere, then 750～900 DEG C
Hydrothermal aging 10～17h, is dried, roasting, obtains the fluid catalytic cracking catalyst aid with low coke yield.
Wherein diluted acid is [H+] it is not more than the dust technology of 0.5mol/L, dilute hydrochloric acid or dilute sulfuric acid.
During catalyst aid spray shaping, SBA-15 template serves the mesopore orbit of protection SBA-15 and is not occupied by binding agent, and catalysis helps
After agent molding, after removing template agent removing by roasting, make catalyst aid retain more mesopore orbit, improve the mass-transfer efficiency in catalytic process, have
It is beneficial to the generation of secondary response in suppression catalytic cracking process, thus is conducive to improving the products distribution of catalytic cracking.
Catalyst aid substrate used in the present invention is clay, aluminium oxide or their mixture, and these raw materials can the most commercially.
Fluid catalytic cracking catalyst aid prepared by the present invention add addition is catalyst host weight 5 to FCC catalyst host～
15%.
Fluid catalytic cracking catalyst aid prepared by the present invention can be used for the catalytic cracking reaction of petroleum heavy oil, the i.e. petroleum distillate of boiling point ＞ 350 DEG C,
The such as catalytic cracking of vacuum distillate, wax tailings, reduced crude and decompression residuum.
The present invention provide catalytic cracking catalyst aid, have excellence heavy oil conversion performance, the yield of gasoline and diesel oil significantly improve while coke
The most substantially reduce with the yield of dry gas.
Detailed description of the invention
The realization of the present invention it is discussed in detail below by way of specific embodiment and is had the advantage that, to help reader to be more fully understood that the present invention's
Novelty essence place, but do not constitute can the restriction of practical range to the present invention.
The evaluation methodology of catalyst aid: select Jinan Refinery FCC apparatus raw oil and poising agent thereof；Auxiliary agent prepared by the present invention is through 800 DEG C
100% steam is aging and mixes by a certain percentage with Jinan Refinery poising agent after drying, then in the design of Kayser company of the U.S.
The activity rating of catalyst aid is carried out on ACE-MODEL R+MM compact catalytic cracking unit.Prevailing operating conditions is as follows: reaction temperature 520
DEG C, oil ratio 5, total consumption of poising agent and catalyst aid is 9g, and catalyst aid accounts for the 10～15wt% of total consumption.Raw material oil properties such as table 1
Shown in.
The physical property of table 1 Jinan FCC feedstock oil
The method of synthesis SBA-15: weigh 20.0g surfactant P123 and be dissolved in 150g H2O, adds 600g, 2mol/L HCl, room
Temperature stirring is completely dissolved to P123.Add 42.5g TEOS, 35-40 DEG C of stirring in water bath 24h.Reactant mixture is transferred to from pressing in reactor,
Crystallization 24h at 80-130 DEG C, is then cooled to room temperature, and sucking filtration, washes and is dried, and i.e. can obtain the former powder of SBA-15 containing template.Close
The method becoming SBA-15 is not limited, and the method for document report all can use.
Embodiment 1
The first step: take the 3.0g former powder of SBA-15 containing template (with contained SiO2Weight meter) and 10mL water be mixed to get serosity A；
Second step: after Kaolin 67.0g and water 150mL mix homogeneously, obtain serosity B；
3rd step: under stirring, serosity A is added mix homogeneously in serosity B, be subsequently added into 12.5g boehmite (with Al2O3Meter)
With 28.4g phosphoric acid (85wt%), then dripping dilute nitric acid solution regulation pH value to 3, room temperature is aged, after spray shaping, and in air atmosphere 550 DEG C
Lower roasting 6h, then 800 DEG C of hydrothermal aging 17h, be dried, and final sizing takes the granule of 60～400 mesh, obtains fluid catalytic cracking catalyst aid
It is designated as S-1.
Embodiment 2
The first step: take the 10.0g former powder of SBA-15 containing template (with contained SiO2Weight meter) and 30mL water be mixed to get serosity A；
Second step: after Kaolin 55.0g and water 130mL mix homogeneously, obtain serosity B；
3rd step: under stirring, serosity A is added mix homogeneously in serosity B, be subsequently added into 12.0g boehmite (with Al2O3Meter)
With 28.0g phosphoric acid (85wt%), then dripping dilute nitric acid solution regulation pH value to 3, room temperature is aged, after spray shaping, and in air atmosphere 550 DEG C
Lower roasting 6h, then 800 DEG C of hydrothermal aging 17h, be dried, and final sizing takes the granule of 60～400 mesh, obtains fluid catalytic cracking catalyst aid
It is designated as S-2.
Comparative example 1
The former powder of SBA-15 containing template in embodiment 2 all spends the replacement of the SBA-15 after template agent removing, and remaining condition keeps constant,
Obtain contrasting auxiliary agent and be designated as R-1.
Comparative example 2
All being replaced with Kaolin by SBA-15 in embodiment 2, remaining condition keeps constant, obtains reference auxiliary agent and is designated as D-1.
Embodiment 3
The first step: take the 15.0g former powder of SBA-15 containing template (with contained SiO2Weight meter) and 40mL water be mixed to get serosity A；
Second step: after Kaolin 55.0g and water 120mL mix homogeneously, obtain serosity B；
3rd step: under stirring, serosity A is added mix homogeneously in serosity B, be subsequently added into 11.8g boehmite (with Al2O3Meter)
With 27.5g phosphoric acid (85wt%), then dripping dilution heat of sulfuric acid regulation pH value to 3, room temperature is aged, after spray shaping, and in air atmosphere 550 DEG C
Lower roasting 6h, then 800 DEG C of hydrothermal aging 17h, be dried, and final sizing takes the granule of 60～400 mesh, obtains fluid catalytic cracking catalyst aid
It is designated as S-3.
Embodiment 4
The first step: take the 30.0g former powder of SBA-15 containing template (with contained SiO2Weight meter) and 70mL water be mixed to get serosity A；
Second step: after Kaolin 40.0g and water 90mL mix homogeneously, obtain serosity B；
3rd step: under stirring, serosity A is added mix homogeneously in serosity B, be subsequently added into 13.0g boehmite (with Al2O3Meter)
With 29.0g phosphoric acid (85wt%), then dripping dilute nitric acid solution regulation pH value to 3, room temperature is aged, after spray shaping, and in air atmosphere 550 DEG C
Lower roasting 6h, then 800 DEG C of hydrothermal aging 17h, be dried, and final sizing takes the granule of 60～400 mesh, obtains the fluidisation with low coke yield
Catalytic cracking catalyst aid is designated as S-4.
Table 2
Performance evaluation condition: reaction temperature is 520 DEG C, oil ratio is 5, and the total consumption of catalyst is 9g, and catalyst aid addition proportion is
10%, remaining 90% is poising agent.D-1 is the reference auxiliary agent without SBA-15, and R-1 is contrast auxiliary agent, and S-1, S-2, S-3, S-4 are and contain
The catalyst aid of SBA-15, and the content of SBA-15 increases successively.
From table 2 result, under identical reaction conditions, after adding reference auxiliary agent D-1, contrast auxiliary agent R-1, catalyst aid, coke yield
All it is decreased obviously.Compared with poising agent, add reference auxiliary agent D-1 conversion ratio and decline 2.45wt%, dry gas, liquefied gas, gasoline, diesel oil, coke
Productivity is all remarkably decreased, and mink cell focus productivity significantly raises, and this is owing to addition reference auxiliary agent D-1 inactive ingredients dilutes whole catalyst system,
The cracking performance causing catalyst overall is deteriorated, conversion ratio declines, and yield of cracked product declines.
Compared with poising agent, consistent with adding reference auxiliary agent D-1 Changing Pattern after adding contrast auxiliary agent R-1, illustrate to contrast SBA-15 in adjuvant component
Do not play a role.With add catalyst aid S-2 Comparative result, analyzing reason should be after in contrast auxiliary agent, SBA-15 removes template agent removing, spraying
During molding, duct is by binding agent and substrate clogging, fails to obtain the auxiliary agent containing open mesopore orbit, and the contrast auxiliary agent R-1 therefore obtained reacts
Performance is the best.
Adding catalyst aid S-1, S-2, S-3, S-4, the conversion ratio of reaction all has and declines by a small margin, crackate dry gas, liquefied gas, coke
Productivity declines, and in crackate, high value added product gasoline, diesel yield all significantly improve, and mink cell focus productivity is held essentially constant.
Add catalyst aid prepared by the present invention, keep FCC conversion ratio to be basically unchanged, improve the products distribution of catalytic cracking, reduce coke and produce
Rate, improves high value added product gasoline, diesel yield in crackate simultaneously.
Embodiment 5
The first step: take the 3.0g former powder of SBA-15 containing template (with contained SiO2Weight meter) add in glass mortar, add 5.1g
MgCl2·6H2O (generating MgO mass after roasting is 1g), is fully ground, obtains in duct containing MgCl2The former powder sample of the SBA-15 containing template
Product.
Second step: SBA-15 and the 10mL water with template containing magnesium salt step one prepared is mixed to get serosity A；
3rd step: after Kaolin 66.0g and water 150mL mix homogeneously, obtain serosity B；
4th step: under stirring, serosity A is added mix homogeneously in serosity B, be subsequently added into 13.5g boehmite (with Al2O3Meter)
With 29.5g phosphoric acid (85wt%), then dripping dilute hydrochloric acid solution regulation pH value to 3, room temperature is aged, after spray shaping, and in air atmosphere 550 DEG C
Lower roasting 6h, then 800 DEG C of hydrothermal aging 17h, be dried, and final sizing takes the granule of 60～400 mesh, obtains fluid catalytic cracking catalyst aid
It is designated as S-5.
Embodiment 6
The first step: take the 10.0g former powder of SBA-15 containing template (with contained SiO2Weight meter) add in glass mortar, add 15.2g
MgCl2·6H2O (generating MgO mass after roasting is 3g), is fully ground, obtains in duct containing MgCl2The former powder sample of the SBA-15 containing template
Product.
Second step: SBA-15 and the 30mL water with template containing magnesium salt step one prepared is mixed to get serosity A；
3rd step: after Kaolin 57.0g and water 130mL mix homogeneously, obtain serosity B；
4th step: under stirring, serosity A is added mix homogeneously in serosity B, be subsequently added into 11.0g boehmite (with Al2O3Meter)
With 27.0g phosphoric acid (85wt%), then dripping dilute nitric acid solution regulation pH value to 3, room temperature is aged, after spray shaping, and in air atmosphere 550 DEG C
Lower roasting 6h, then 800 DEG C of hydrothermal aging 17h, be dried, and final sizing takes the granule of 60～400 mesh, obtains fluid catalytic cracking catalyst aid
It is designated as S-6.
Embodiment 7,8
By the magnesium salt MgCl in embodiment 62·6H2O (generating MgO mass after roasting is 3g) is respectively with 19.2g Mg (NO3)2·6H2O and 16.1g
Mg(CH3COO)2·4H2O replaces, and other condition is constant, and the fluid catalytic cracking catalyst aid obtaining correspondence is designated as S-7 and S-8.
Embodiment 9
Change the method introducing magnesium salt in first step SBA-15 duct in embodiment 6 into infusion process.Specific implementation method is: take 15.2g
MgCl2·6H2O (generating MgO mass after roasting is 3g) dissolves in 20mLH2In O, under stirring condition, add the 10.0g SBA-15 containing template
Former powder is (with contained SiO2Weight meter), room temperature solvent flashing water, 100 DEG C dry samples, obtain containing MgCl2The SBA-15 containing template former
Powder sample.Keeping the amount of each raw material in embodiment 6 constant, remaining step is the most constant, obtains fluid catalytic cracking catalyst aid and is designated as S-9.
Comparative example 3
All being replaced with Kaolin by SBA-15 in embodiment 6, remaining condition keeps constant, obtains reference auxiliary agent note D-2.
Embodiment 10
The first step: 15.0g is contained the former powder of SBA-15 of template (with contained SiO2Weight meter) with 25.4g MgCl2·6H2O (generates after roasting
MgO mass is 5g) it is fully ground, obtain containing MgCl2The former powder sample of the SBA-15 containing template.
Second step: SBA-15 and the 40mL water with template containing magnesium salt step one prepared is mixed to get serosity A；
3rd step: after Kaolin 50.0g and water 120mL mix homogeneously, obtain serosity B；
4th step: under stirring, serosity A is added mix homogeneously in serosity B, be subsequently added into 13.0g boehmite (with Al2O3Meter)
With 29.0g phosphoric acid (85wt%), then dripping dilute nitric acid solution regulation pH value to 3, room temperature is aged, after spray shaping, and in air atmosphere 550 DEG C
Lower roasting 6h, then 800 DEG C of hydrothermal aging 17h, be dried, and final sizing takes the granule of 60～400 mesh, obtains the fluidisation with low coke yield
Catalytic cracking catalyst aid is designated as S-10.
Embodiment 11
The first step: take the 30.0g former powder of SBA-15 containing template (with contained SiO2Weight meter) with 76.1g MgCl2·6H2O (generates after roasting
MgO mass is 15g), it is fully ground, obtains containing MgCl2The former powder sample of the SBA-15 containing template.
Second step: SBA-15 and the 90mL water with template containing magnesium salt step one prepared is mixed to get serosity A；
3rd step: after Kaolin 25.0g and water 60mL mix homogeneously, obtain serosity B；
4th step: under stirring, serosity A is added mix homogeneously in serosity B, be subsequently added into 14.0g boehmite (with Al2O3Meter)
With 29.8g phosphoric acid (85wt%), then dripping dilute nitric acid solution regulation pH value to 3, room temperature is aged, after spray shaping, and in air atmosphere 550 DEG C
Lower roasting 6h, then 800 DEG C of hydrothermal aging 17h, be dried, and final sizing takes the granule of 60～400 mesh, obtains the fluidisation with low coke yield
Catalytic cracking catalyst aid is designated as S-11.
Table 3 performance evaluation condition: reaction temperature is 520 DEG C, oil ratio is 5, and the total consumption of catalyst is 9g, catalyst aid addition institute accounting
Example is 10%, and remaining 90% is poising agent.D-1 is the reference auxiliary agent without MgO and SBA-15, and D-2 is containing MgO but without SBA-15
Reference auxiliary agent, S-5, S-6, S-10, S-11 are the catalyst aid containing MgO/SBA-15, and the content of SBA-15 and MgO increases successively.
Table 3
From table 3 result, under identical reaction conditions, after adding reference auxiliary agent and catalyst aid, coke yield is all decreased obviously.With balance
Agent is compared, and adds reference auxiliary agent D-1, D-2 conversion ratio and declines notable, and dry gas in pyrolysis product, liquefied gas, gasoline, diesel oil, coke yield are equal
Being remarkably decreased, mink cell focus productivity significantly raises, and this is owing to addition reference auxiliary agent D-1, D-2 inactive ingredients dilutes whole catalyst system,
The cracking performance causing catalyst overall is deteriorated, conversion ratio declines, and yield of cracked product declines.D-1, D-2 group is compared it can be seen that contain MgO
D-2 group coke yield lower, illustrate in auxiliary agent add MgO contribute to reduce coke yield.
Compared with poising agent, adding catalyst aid S-5, S-6, S-10, the conversion ratio of reaction declines successively, dry gas in crackate, liquefied gas,
Coke yield declines successively；In crackate, high value added product yield of gasoline declines successively, but compared with poising agent, all increases；Cracking is produced
In thing, high value added product diesel yield increases successively；Mink cell focus productivity increases the most successively.When adding catalyst aid S-11, due to alkalescence oxygen
U content is high, and reaction conversion ratio declines further, and in crackate, high value added product diesel yield improves, yield of gasoline declines, but both
Total recovery is compared poising agent and is still increased.
From table 3 it can be seen that add the catalyst aid containing MgO/SBA-15 prepared by the present invention, improve the products distribution of catalytic cracking, reduce
Coke yield, improves high value added product gasoline, diesel yield in crackate simultaneously.
Table 4
Table 4 performance evaluation condition: reaction temperature is 520 DEG C, oil ratio is 5, and the total consumption of catalyst is 9g, catalyst aid addition institute accounting
Example is 10%, and remaining 90% is poising agent.
D-1 is the reference auxiliary agent without MgO and SBA-15, and D-2 is containing MgO but not contain the reference auxiliary agent of SBA-15, and S-2 is containing only SBA-15
Catalyst aid, S-6, S-7, S-8 be the catalyst aid containing MgO/SBA-15, and content of MgO is the most equal, and difference is the magnesium salt of correspondence not
With, correspond respectively to magnesium chloride, magnesium nitrate, magnesium acetate.
S-2 Yu S-6, S-7, S-8 contrast from table 4, the catalyst aid containing MgO/SBA-15 drops than the catalyst aid containing only SBA-15
Low coke effect becomes apparent from.S-6, S-7, S-8 contrast discovery, and catalyst aid reactivity worth better than poising agent and reference prepared by different magnesium salts help
Agent, is compared to each other difference little.
Table 5
Table 5 performance evaluation condition: reaction temperature is 520 DEG C, oil ratio is 5, and the total consumption of catalyst is 9g, catalyst aid addition institute accounting
Example is 10%, and remaining 90% is poising agent.S-6 is the catalyst aid containing MgO/SBA-15 prepared by polishing, and S-9 is containing of preparing of infusion process
The catalyst aid of MgO/SBA-15.
Compared with poising agent, after adding the catalyst aid containing MgO/SBA-15 prepared by two kinds of methods introducing magnesium salt, the conversion ratio of reaction is the most
Declining, in crackate, dry gas, liquefied gas, coke yield decline, and in crackate, high value added product gasoline, diesel yield all significantly improve,
Mink cell focus productivity has risen.Catalyst aid containing MgO/SBA-15 prepared by the method for two kinds of introducing magnesium salts all can improve the product of catalytic cracking
Distribution, reduces coke yield, improves high value added product gasoline, diesel yield in crackate simultaneously.
Claims (5)
1. the preparation method of a fluid catalytic cracking catalyst aid with low coke yield, it is characterised in that the method includes step in detail below:
The first step: the preparation former powder of SBA-15 containing template is directly used in second step, or will be used further to second step in the magnesium salt introducing SBA-15 duct containing template, and wherein, magnesium salt consumption in terms of content of magnesia accounts for 0 or 1 ~ 15 wt % of catalyst aid gross weight；
Second step: the former powder of the SBA-15 containing template the introducing magnesium salt first step prepared or the former powder of the SBA-15 containing template being directly synthesized are mixed to get serosity A with water；Wherein the former powder of SBA-15 containing template is with contained SiO2Meter consumption accounts for 3 ~ 30 wt % of catalyst aid gross weight；
3rd step: after substrate and water mix homogeneously, obtains serosity B, and wherein substrates quantity accounts for 62～30 wt % of catalyst aid gross weight；
4th step: serosity A and serosity B is mixed, add binding agent, drip dilute acid for adjusting pH value to 2 ~ 3, after the most aged, spray shaping, roasting 2～6 h at 450～600 DEG C in air atmosphere, then 750～900 DEG C of hydrothermal aging 10～17 h, are dried, obtain the fluid catalytic cracking catalyst aid with low coke yield；Wherein, binding agent is the aluminum phosphate that boehmite generates with phosphatase reaction, and its boehmite is that chemical reaction measures ratio with the consumption that adds of phosphoric acid, and binding agent accounts for 35～25 wt % of catalyst aid gross weight；Each composition by weight percent sum of catalyst aid is 100%.
Preparation method the most according to claim 1, it is characterised in that the method introducing magnesium salt is infusion process or solid-phase sequencing, and magnesium salt is magnesium acetate, magnesium nitrate, magnesium chloride or their mixture.
Preparation method the most according to claim 1, it is characterised in that described substrate is clay, aluminium oxide or their mixture.
Preparation method the most according to claim 1, it is characterised in that described diluted acid is [H+] it is not more than the dust technology of 0.5mol/L, dilute hydrochloric acid or dilute sulfuric acid.
5. the fluid catalytic cracking catalyst aid with low coke yield obtained by claim 1 preparation method.
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| CN108067287B (en) * | 2016-11-17 | 2021-04-06 | 中国石油化工股份有限公司 | Carrier containing SBA-15 molecular sieve, preparation method and application thereof |
| CN108067290B (en) * | 2016-11-17 | 2021-05-04 | 中国石油化工股份有限公司 | Carrier and catalyst containing bimolecular sieve, and preparation method and application thereof |
| CN106925342B (en) * | 2017-04-21 | 2020-02-07 | 武汉凯迪工程技术研究总院有限公司 | Improved diesel hydrocracking catalyst and preparation method thereof |
| CN107008509B (en) * | 2017-04-21 | 2020-02-07 | 武汉凯迪工程技术研究总院有限公司 | Improved diesel hydrocracking catalyst carrier and preparation method thereof |
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| CN102600826B (en) * | 2011-01-25 | 2015-11-18 | 北京化工大学 | A kind of assistant for calalytic cracking composition and assistant for calalytic cracking |
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