CN104399518B - A kind of light FCC gasoline aromatized catalyst preparation method - Google Patents
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Abstract
The invention belongs to Petroleum Processing Technology field, is related to a kind of light FCC gasoline aromatized catalyst preparation method；The preparation method of the catalyst mainly includes nanometer ZSM 5 molecular sieve modified, preparation of carrier, preparation of catalyst etc., and the catalyst of preparation can reduce the low-carbon alkene in light FCC gasoline to greatest extent and ensure that octane number is not reduced or even improved.The present invention has considered the characteristics of aromatized catalyst for reducing the production of low-carbon alkene content rich in aromatic hydrocarbons, and the catalyst activity of preparation, selectivity, stability are distributed well, and experimental implementation is simple, can change process conditions in very large range.
Description
Technical field
The invention belongs to Petroleum Processing Technology field, is directed primarily to a kind of light FCC gasoline aromatized catalyst system
Preparation Method, more particularly to a kind of aromatized catalyst preparation method containing zeolite.
Background technology
Recently as the increasingly strict of environmental requirement, new gasoline standard has been promulgated in countries in the world in succession, and China is not yet
Exception.But China's gasoline compositing characteristic is that olefin(e) centent is higher and octane number is relatively low, therefore reduce olefin(e) centent in gasoline, again
It is the current urgent problem in China to ensure the original octane number of gasoline not reducing.Due to C in China's FCC gasoline6-C10Alkene and
Determination of Alkane Content is higher, and this some olefin and alkane are all fragrant materials of diving, available for producing aromatic hydrocarbons.At present will using catalytic aromatization
The method that alkane and alkene are converted into aromatic hydrocarbons mainly has Alphy, Aroforming, Cyclar, LAN, M2-ReforRlng and Z-
Forming etc..The catalytically cracked gasoline developed cooperatively by Fushun Petrochemical Research Institute and Dalian University of Technology is alkylated, aromatization
Change technology（OlefinToAromatics＆Alkyate, abbreviation OTA）, using catalytic gasoline of whole fraction as raw material, pass through hydro carbons
The hydrocarbon conversion reactions such as alkylation, aromatisation, isomerization and a small amount of cracking, are greatly lowered olefin(e) centent, while product
Loss of octane number is smaller, and yield of gasoline is high.
Guo Hongchen etc. uses modified Nano ZSM-5 zeolite catalyst, and FCC gasoline has been carried out on small fixed reactor
Aromatization, the Olefin decrease effect of catalyst is investigated.Continuous 300h small test running shows that the alkene in FCC gasoline exists
A kind of grain size is that aromatic hydrocarbons can be effectively converted on 20-50nm modified Nano ZSM-5 zeolite, and Olefin decrease amplitude is individual up to 20
More than product percentage point, the index such as the octane number of gasoline, composition and boiling range is satisfied by new national standard requirement after modification.
It is one of current common method to reduce alkene in gasoline using aromatization, and lighter hydrocarbons are converted into aromatic hydrocarbons it is crucial
It is research and development aromatized catalyst, ZSM-5 zeolite molecular sieve has unique three-dimensional central hole structure and received much attention, particularly
When zeolite molecular sieve crystal grain is reduced to 100 nanometers, due to its have specific surface area is big, surface energy is high, micropore diffusion passage is short,
The significant advantages such as superficial catalytic activation position is more, reaction condition relaxes, catalytic performance is excellent and is easily separated with product, in Industrial Catalysis
Field has wide research and development and application prospect.Low-carbon alkene is converted into aromatic hydrocarbons, key is that the development of catalyst
With exploitation.American and Britain, Deng states and Dalian Inst of Chemicophysics, Chinese Academy of Sciences of China, Shanxi coal research institute, Luoyang stone
Research of the units such as oily chemical engineering company all in terms of catalyst is carried out, it is especially more with catalyst HZSM-5 modified report,
It is but less to the report about nano-ZSM-5 catalyst.And the raw material studied in the past is mostly monomer alkane or alkene and its mixed
Compound, and coker gasoline is split for raw material progress aromatization modification raising octane number, the aromatisation of drippolene, catalysis in recent years
The aromatisation for changing gasoline is studied, and achieves better result.Especially because nano material has the physical of uniqueness
It can cause countries in the world material scholar in recent years with specific chemical property and be catalyzed the very big attention and concern of scholar,
As material science and the focus of novel cross discipline research, breakthrough is achieved, and broadness is presented in many fields
Application prospect.
CN98117812 X provide a kind of method of catalytic aromatization of gasoline fraction, be make the feedstock oil after preheating and
Water vapour contacts, in temperature 500-650 in fluidized-bed reactor with the microspherical catalyst of the silica-rich zeolite containing five-membered ring of heat
DEG C, pressure 0.15- 0.40MPa, weight (hourly) space velocity (WHSV) 1- 6h-1, oil ratio 5-15:1st, water-oil factor 0.05-0.5:1
Under the conditions of reacted；Reaction product, water vapour and catalyst to be regenerated carry out gas solid separation；Separation reaction product is rich in
The gaseous product of propylene and butylene and the product liquid rich in aromatic hydrocarbons；Reclaimable catalyst returns after water vapour stripping and coke burning regeneration
Reactor cycles are returned to use.The characteristics of this method be conveyed using fluidized-bed reactor and catalyst fluidization it is continuous anti-
Should-regeneration cycle mode of operation progress aromatization.Catalyst used in aromatisation modified-reaction device is that solid acid is urged
Agent and the solid acid catalyst of modification, specifically ZSM-5, ZSM-11, ZSM-12, ZSM-35, MCM-22, Y molecular sieve,
A kind of and several and these molecular sieves modified catalyst of beta molecular sieves.The modification of the catalyst is to add the VIIIth race
Element, halogens, Mo, Mg, Zn, P, Na one or more ions are modified, and the weight content of ion is 0.01-
20%.
CN103357430A provides a kind of aromatisation cocrystallized molecular sieve catalyst, preparation method and applications, should
Catalyst-ZSM-5/ZSM-11 the cocrystallization of fine grain rare earth containing 35-75wt% molecular sieve, 1.0-6.0wt% ZNO and 0.5-
5.0wt% P2O5, remaining is alchlor and kaolin；By rare earth-ZSM-5/ZSM-11, ZnO precursor, P2O5Precursor, three
Alumina precursor, kaolin and water are well mixed, spray shaping, roasting, and catalyst of the present invention is made.Catalyst of the present invention is used for
In the catalytic material conversion process such as lower carbon number hydrocarbons, coal base or bio-based oxygenatedchemicals and waste or used plastics, there is aromatic hydrocarbons or higher octane
It is worth gasoline component high income, the features such as catalyst hydrothermal stability and good regenerability.
Aromatized catalyst in above-mentioned patent uses the modified zsm-5 zeolite of different performance, and this is due to modification side
Method is different, therefore has also resulted in the difference on catalyst performance.But it is fast coking to be all present in above-mentioned catalyst, the cycle of operation
It is short, the shortcomings that arenes selectivity is low, and accessory substance is more.
The content of the invention
Goal of the invention：
Instant invention overcomes weak point of the prior art, there is provided a kind of light FCC gasoline aromatized catalyst system
Preparation Method, modified Nano HZSM-5 zeolite catalysts are obtained by being modified processing to nano-ZSM-5 molecular sieve, be adapted to processing
The high inferior raw material of olefin(e) centent, while catalyst has higher catalytic activity and arenes selectivity, can apply to more
The process conditions of mitigation, and the octane number of gasoline can be improved.Can effectively solve the technical barrier of existing aromatized catalyst,
For the research of technology of aromatization technology, implement to provide reliable guarantee.
Technical scheme：
A kind of light FCC gasoline aromatized catalyst preparation method, by being carried out to nano-sized ZSM-5 zeolite molecular sieve
Modification obtains modified Nano HZSM-5 zeolite molecular sieve catalysts, it is characterised in that：This method step is as follows：
（1）Ion exchange is carried out to sodium form ZSM-5 zeolite with ammonium salt solution 3 times, dried, roasting；With inorganic acid or have again
Machine acid carries out pickling processes to molecular sieve, is washed to neutrality, repeats dry, calcination stepses, obtains Nano-sized HZSM-5 zeolite molecules
Sieve；
（2）The high-temperature vapor processing of Nano-sized HZSM-5 zeolite molecular sieve：In fixed bed reactors, with measuring pump water flowing or
0.1-0.5mol/LNH3-H2O carries out High-temperature water heat treatment to Nano-sized HZSM-5 zeolite molecular sieve；
（3）Above-mentioned Nano-sized HZSM-5 zeolite molecular sieve is added to one kind in rare earth or metallic cobalt, molybdenum, nickel, gallium, zinc
Or room temperature immersion in two kinds of mixed solutions, then water is evaporated, dried, roasting obtains required modified Nano HZSM-5 zeolites point
Sub- sieve catalyst.
The modification method of zeolite molecular sieve is as follows：
（1）Nano-sized ZSM-5 zeolite molecular sieve is placed in ammonium salt solution, heated in 80-100 DEG C of water-bath, stirs lower ammonium
Salt exchanges 0.5-3h, filtering, is washed with 10 times of deionized water, is put into after 120 DEG C of drying 2h in crucible and journey is used in Muffle furnace
The method of sequence heating, is cooled to normal temperature after 550 DEG C of constant temperature 4h；
（2）Take step（1）The Nano-sized HZSM-5 zeolite molecular sieve of gained is put into fixed bed reactors, at 300-500 DEG C
At a temperature of, with measuring pump water flowing or 0.1-0.5mol/L NH3-H2O handles 3-6h；
（3）With the mixed aqueous solution processing step of inorganic acid or/and organic acid（2）The molecular sieve of gained, then filter, water
Wash and dry, obtain nano-HZSM-5 zeolite；Inorganic acid or organic acid are in hydrochloric acid, sulfuric acid, nitric acid, acetic acid, citric acid
It is one or more；
（4）By step（3）It is mixed that gained molecular sieve is added to one or both of rare earth or metallic cobalt, molybdenum, nickel, gallium, zinc
Room temperature immersion 6-10h in solution is closed, is then evaporated water, 2h is dried at 120 DEG C, 550 DEG C are warming up in Muffle furnace Program
10h is calcined, obtains required modified Nano HZSM-5 zeolite molecular sieve catalysts.
The preparation process of catalyst is：By 80% ZSM-5（Butt）With 20% boehmite（Butt）It is well mixed, add
Enter inorganic acid solution, with a diameter of 1mm column type orifice plate extruded moulding；12h is dried under the conditions of 100-120 DEG C, in 550 DEG C of bars
3h is calcined under part, obtains sodium form ZSM-5 zeolite.
The load of catalyst modification metal, in terms of oxide, metallic cobalt, molybdenum, nickel, the content of gallium or zinc are 10.0%-
20.0%, the content of rare earth metal is 5.0%-10.0%；With the solution impregnated catalyst carrier containing required modified component, dipping
Then carrier afterwards is calcined 2-6 h in 100-150 DEG C of dry l-12h at 450-600 DEG C, final catalyst is made.
The preferred infusion process of carrying method, impregnated using saturation, excessive dipping or complexing impregnate.
Advantage and effect：
The present invention proposes a kind of light FCC gasoline aromatized catalyst preparation method, and aromatized catalyst includes receiving
The preparation and modification of rice HZSM-5 zeolite catalysts, wherein described nano molecular sieve has advantages below：
（1）Bigger outer surface；
（2）Skeleton structure is more regular, and for the angle of crystallization, the order of more small range is easily controllable, therefore, shape
Into molecular sieve just show more regular angle and more complete crystal formation, show very regular crystalline structure；
（3）More exposed structure cell, under similarity condition, the structure cell number that nanometer superfine molecular sieves are exposed to surface increases rapidly
Add, about 10% or so, this just reduces the limitation of diffusion to a greater extent, has high reaction for the reaction of diffusion control
Speed；
（4）Transfer performance is more preferable, is advantageous to improve reaction selectivity；
（5）More easily accessible active sites, the reduction of nano molecular sieve granularity are exposed a batch of active sites
Come, or apart from surface be easier to diffuse into closer to, reactant and proximate to it, and then trigger catalytic reaction, improve molecule
The utilization rate of active sites on sieve；
（6）The structure being easily modified, nanometer superfine molecular sieves are because framework aluminum is evenly distributed, the outer exchangeable cations of skeleton
Distribution it is also more uniform, while duct is shorter, suitable for spreading and redistributing；Duct is short simultaneously, and surface area is big, metal component
It is easier to enter endoporus, can also carries more components；
（7）Duct is short and regular, it is easier to is contacted with reactant, is also beneficial to the removing of product, active sites utilize effect
Rate can be higher；Simultaneously as grain size reduces, the possibility for making lattice defect occurs in large scale reduces, and crystal structure is more
Tend to be complete, be also beneficial to diffusion and catalytic reaction.
Embodiment
With reference to specific embodiment, the present invention is described further, but protection scope of the present invention is not implemented
The limitation of example.
The present invention is a kind of light FCC gasoline aromatized catalyst preparation method, by nano-sized ZSM-5 zeolite point
Son sieve is modified processing and obtains modified Nano HZSM-5 zeolite molecular sieve catalysts, it is characterised in that：This method step is as follows：
（1）Ion exchange is carried out to sodium form ZSM-5 zeolite with ammonium salt solution 3 times, dried, roasting；With inorganic acid or have again
Machine acid carries out pickling processes to molecular sieve, is washed to neutrality, repeats dry, calcination stepses, obtains Nano-sized HZSM-5 zeolite molecules
Sieve；
（2）The high-temperature vapor processing of Nano-sized HZSM-5 zeolite molecular sieve：In fixed bed reactors, with measuring pump water flowing or
0.1-0.5mol/LNH3-H2O carries out High-temperature water heat treatment to Nano-sized HZSM-5 zeolite molecular sieve；
（3）Above-mentioned Nano-sized HZSM-5 zeolite molecular sieve is added to one kind in rare earth or metallic cobalt, molybdenum, nickel, gallium, zinc
Or room temperature immersion in two kinds of mixed solutions, then water is evaporated, dried, roasting obtains required modified Nano HZSM-5 zeolites point
Sub- sieve catalyst.
The method of modifying of above-mentioned zeolite molecular sieve comprises the following steps that：
（1）Nano-sized ZSM-5 zeolite molecular sieve is placed in ammonium salt solution, heated in 80-100 DEG C of water-bath, stirs lower ammonium
Salt exchanges 0.5-3h, filtering, is washed with 10 times of deionized water, is put into after 120 DEG C of drying 2h in crucible and journey is used in Muffle furnace
The method of sequence heating, is cooled to normal temperature after 550 DEG C of constant temperature 4h；
（2）Take step（1）The catalyst nano HZSM-5 zeolite molecular sieves of gained are put into fixed bed reactors, in 300-
At a temperature of 500 DEG C, with measuring pump water flowing or 0.1-0.5mol/L NH3-H2O handles 3-6h；
（3）With the mixed aqueous solution processing step of inorganic acid or/and organic acid（2）The molecular sieve of gained, then filter, water
Wash and dry, obtain nano-HZSM-5 zeolite；Inorganic acid or organic acid are in hydrochloric acid, sulfuric acid, nitric acid, acetic acid, citric acid
It is one or more；
（4）By step（3）It is mixed that gained molecular sieve is added to one or both of rare earth or metallic cobalt, molybdenum, nickel, gallium, zinc
Room temperature immersion 6-10h in solution is closed, is then evaporated water, 2h is dried at 120 DEG C, 550 DEG C are warming up in Muffle furnace Program
10h is calcined, obtains required modified Nano HZSM-5 zeolite molecular sieve catalysts.
Above-mentioned ammonium salt can be ammonium nitrate or ammonium chloride.
The preparation process of catalyst is：By 80% ZSM-5（Butt）With 20% boehmite（Butt）It is well mixed, add
Enter inorganic acid solution（Play a part of peptizing agent）, with a diameter of 1mm column type orifice plate extruded moulding；In 100-120 DEG C of condition
Lower dry 12h, 3h is calcined under the conditions of 550 DEG C, obtains sodium form ZSM-5 zeolite.
The load of catalyst modification metal, in terms of oxide, metallic cobalt, molybdenum, nickel, the content of gallium or zinc are 10.0%-
20.0%, the content of rare earth metal is 5.0%-10.0%；With the solution impregnated catalyst carrier containing required modified component, dipping
Then carrier afterwards is calcined 2-6 h in 100-150 DEG C of dry l-12h at 450-600 DEG C, final catalyst is made.
The preferred infusion process of carrying method, impregnated using saturation, excessive dipping or complexing impregnate.
Embodiment 1
A kind of preparation process of modified molecular screen is：
（1）Take NaZSM-5 molecular sieves 30g to be placed in 500mL beakers, it is molten to add the ammonium nitrate that 200mL mass fractions are 10%
Liquid, under agitation, 90 DEG C are warming up to, constant temperature backflow 2h, product is then placed in Muffle by filtering, washing, 120 DEG C of dry 2h
Stove Program is warming up to 550 DEG C, is calcined 4h, repeats operation above 2 times, modified molecular screen product, numbering A.
（2）Take 20 grams of A molecular sieves to be put into fixed bed reactors constant temperature zone, be warming up to 500 DEG C with 5 DEG C/min speed, treat
After temperature is constant, with measuring pump water flowing（0.1mL/min）3h is handled, the molecular sieve numbering after the processing is B.
（3）Take B molecular sieves 20g to be placed in 500mL beakers, add 200 milliliters of 0.6mol/L nitric acid and 0.2mol/L lemons
Lemon acid mixed solution, under agitation, 80 DEG C, the h of constant temperature 6 being warming up to, product passes through filtering, washing, 120 DEG C of 4 h of drying,
Then repeat operation above 1 time, obtain molecular sieve, numbering C.
（4）By kneadings such as appropriate molecular sieve C, boehmite, adhesive, extrusion aids, extruded moulding, 120 DEG C of dry 2h,
550 DEG C of constant temperature calcining 4h, are prepared into after carrier, after being impregnated 12 hours with the solution containing zinc nitrate and lanthanum nitrate, dry, roasting
Obtain aromatized catalyst.
Embodiment 2
Step（2）In water be changed to 0.1mol/L NH3-H2O, remaining preparation process is the same as embodiment 1.
Embodiment 3
Step（4）In zinc nitrate be changed to nickel nitrate dipping modification carried out to molecular sieve, the same embodiment of remaining preparation process
1。
Comparative example 1
With NaZSM-5 molecular sieves 10g：Ammonium sulfate 6.5g:The ratio of 50mL water is prepared, and is put into three-necked flask.
Ion-exchange temperature is 95 DEG C, time lh, then, is filtered, washing, then with 6.5g ammonium sulfate：The solution of 50mL water it is secondary from
Son exchanges last filtering, washs wet filter cake, 2h is calcined at 600 DEG C.
ZSM-5 molecular sieves after roasting, become fine powder by grinding, take 5g fine powders：6.5g ammonium sulfate：50mL water,
Process is same as above.
The above-mentioned molecular sieve 5g by the roasting of three friendship three are taken to be put into fixed bed reactors constant temperature zone, with 5 DEG C/min speed liter
Temperature is to 500 DEG C, after temperature is constant, with measuring pump water flowing（0.1ml/min）3 h are handled,
Molecular sieve after above-mentioned exchange and hydro-thermal process, grind into powder, is placed in three-necked flask；Then add
35mL 10% oxalic acid and ammonium oxalate solution, heating water bath stir lh to 100 DEG C, filtration drying after having reacted, roasting.
To modified HZSM-5 molecular sieve.
Embodiment 4
The method of modifying of zeolite molecular sieve, is comprised the following steps that：
（1）Nano-sized ZSM-5 zeolite molecular sieve is placed in ammonium nitrate solution, heated in 80 DEG C of water-baths, stirs lower ammonium salt
3h is exchanged, filtering, is washed with 10 times of deionized water, is put into after 120 DEG C of drying 2h in crucible and temperature programming is used in Muffle furnace
Method, be cooled to normal temperature after 550 DEG C of constant temperature 4h；
（2）Take step（1）The Nano-sized HZSM-5 zeolite molecular sieve of gained is put into fixed bed reactors, in 300 DEG C of temperature
Under degree, with measuring pump water flowing or 0.5mol/L NH3-H2O handles 4h；
（3）With the mixed aqueous solution processing step of inorganic acid or/and organic acid（2）The molecular sieve of gained, then filter, water
Wash and dry, obtain nano-HZSM-5 zeolite；Inorganic acid or organic acid are in hydrochloric acid, sulfuric acid, nitric acid, acetic acid, citric acid
It is a kind of；
（4）By step（3）Gained molecular sieve is added to room temperature immersion 6h in rare earth or metal cobalt liquor, then steams water
It is dry, 2h is dried at 120 DEG C, 550 DEG C of roasting 10h is warming up in Muffle furnace Program, obtains required modified Nano HZSM-5
Zeolite molecular sieve catalyst.
Embodiment 5
The method of modifying of zeolite molecular sieve, is comprised the following steps that：
（1）Nano-sized ZSM-5 zeolite molecular sieve is placed in ammonium nitrate solution, heated in 100 DEG C of water-baths, stirs lower ammonium salt
0.5h is exchanged, filtering, is washed with 10 times of deionized water, is put into after 120 DEG C of drying 2h in crucible in Muffle furnace with program liter
The method of temperature, normal temperature is cooled to after 550 DEG C of constant temperature 4h；
（2）Take step（1）The Nano-sized HZSM-5 zeolite molecular sieve of gained is put into fixed bed reactors, in 400 DEG C of temperature
Under degree, with measuring pump water flowing or 0.2mol/L NH3-H2O handles 6h；
（3）With the mixed aqueous solution processing step of inorganic acid or/and organic acid（2）The molecular sieve of gained, then filter, water
Wash and dry, obtain nano-HZSM-5 zeolite；Inorganic acid or organic acid are in hydrochloric acid, sulfuric acid, nitric acid, acetic acid, citric acid
It is one or more；
（4）By step（3）Gained molecular sieve is added to room temperature immersion 10h in rare earth or metal molybdenum solution, then steams water
It is dry, 2h is dried at 120 DEG C, 550 DEG C of roasting 10h is warming up in Muffle furnace Program, obtains required modified Nano HZSM-5
Zeolite molecular sieve catalyst.
Embodiment 6
Step（1）Ammonium salt solution is ammonium chloride solution, by step（3）Gained molecular sieve is added to room temperature in metal nickel solution
8h is impregnated, other steps are the same as embodiment 5.
Embodiment 7
Step（1）Ammonium salt solution is ammonium chloride solution, by step（3）Gained molecular sieve is added in metal Gallium solution, its
Its step is the same as embodiment 5.
Embodiment 8
Step（1）Ammonium salt solution is ammonium chloride solution, by step（3）Gained molecular sieve is added in metal zinc solution, its
Its step is the same as embodiment 5.
Embodiment 9
Step（1）Ammonium salt solution is ammonium nitrate solution, by step（3）Gained molecular sieve is added to rare earth or metallic zinc and nickel
In mixed solution, other steps are the same as embodiment 5.
Conclusion：The activator raw material of the present invention is cheaply easily bought, and preparation process is simple and easy and without poisonous and harmful substance
Generation, for the strong adaptability of material property change, it also is adapted for carrying out experimental study to existing technology of aromatization technology, can be effective
Solve laboratory research problem, for the research of light FCC gasoline technology of aromatization technology, implement to provide reliable guarantee.
Claims (3)
- A kind of 1. light FCC gasoline aromatized catalyst preparation method, by changing to nano-sized ZSM-5 zeolite molecular sieve Property handles to obtain modified Nano HZSM-5 zeolite molecular sieve catalysts, it is characterised in that：This method step is as follows：A, sodium form ZSM-5 zeolite molecular sieve is placed in ammonium salt solution, heated in 80-100 DEG C of water-bath, stirred lower ammonium salt and exchange 0.5-3h, filtering, is washed with 10 times of deionized water, is put into after 120 DEG C of drying 2h in crucible and temperature programming is used in Muffle furnace Method, normal temperature is cooled to after 550 DEG C of constant temperature 4h, repeats operation above 2 times；In step a, by 80% ZSM-5（Butt）With 20% boehmite（Butt）It is well mixed, inorganic acid solution is added, With a diameter of 1mm column type orifice plate extruded moulding；12h is dried under the conditions of 100-120 DEG C, 3h is calcined under the conditions of 550 DEG C, obtains To sodium form ZSM-5 zeolite molecular sieve；B, the Nano-sized HZSM-5 zeolite molecular sieve obtained by step a is taken to be put into fixed bed reactors, in 300-500 DEG C of temperature Under, with measuring pump water flowing or 0.1-0.5mol/L NH3-H2O carries out High-temperature water heat treatment 3-6h；C, with the Nano-sized HZSM-5 zeolite molecular sieve obtained by the mixed aqueous solution processing step b of inorganic acid or/and organic acid, then Filter, be washed to neutrality, dry, repeat operation above 1 time, obtain Nano-sized HZSM-5 zeolite molecular sieve；Inorganic acid is organic Acid is the one or more in hydrochloric acid, sulfuric acid, nitric acid, acetic acid, citric acid；D, the Nano-sized HZSM-5 zeolite molecular sieve obtained by step c is added to one kind in rare earth or metallic cobalt, molybdenum, nickel, gallium, zinc Or room temperature immersion 6-10h in two kinds of mixed solutions, then water is evaporated, 2h is dried at 120 DEG C, is heated up in Muffle furnace Program To 550 DEG C of roasting 10h, required modified Nano HZSM-5 zeolite molecular sieve catalysts are obtained.
- 2. light FCC gasoline aromatized catalyst preparation method according to claim 1, it is characterised in that：Catalyst The load of modified metal, in terms of oxide, metallic cobalt, molybdenum, nickel, the content of gallium or zinc are 10.0%-20.0%, and rare earth metal contains Measure as 5.0%-10.0%；With the solution impregnated catalyst carrier containing required modified component, the carrier after dipping is at 100-150 DEG C L-12h is dried, is then calcined 2-6 h at 450-600 DEG C, final catalyst is made.
- 3. light FCC gasoline aromatized catalyst preparation method according to claim 2, it is characterised in that：Load side Method is using saturation dipping, excessive dipping or complexing dipping.
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| CN106902885B (en) * | 2017-03-29 | 2019-08-13 | 中国矿业大学 | Ion-exchange prepares metal ni-loaded catalyst method and catalyst and application |
| US20220017829A1 (en) * | 2020-07-20 | 2022-01-20 | Saudi Arabian Oil Company | Systems and processes for direct converting distillate fractions of crude oil to olefins |
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