CN105435836A - Hydrocracking catalyst, and preparation method and application thereof - Google Patents
Hydrocracking catalyst, and preparation method and application thereof Download PDFInfo
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Abstract
The invention relates to a hydrocracking catalyst, and a preparation method and an application thereof. The catalyst contains a carrier containing a molecular sieve solid acid component, the molecular sieve solid acid component is a ZSM-5 molecular sieve and MoBeta molecular sieve mixture, and a weight ratio of ZSM-5 molecular sieve to MoBeta molecular sieve in the molecular sieve mixture is 9:1-1:9, wherein n of the MoBeta zeolite is greater than 0 and smaller than 1, n is I/alphaI0, and an FT-IR characterization result shows that I is the intensity of an absorption peak in 3610cm<-1> in the FT-IR spectrum of the MoBeta zeolite molecular sieve, I0 is the intensity of an absorption peak in 3610cm<-1> in the FT-IR spectrum of the parent Beta zeolite molecular sieve of the MoBeta zeolite molecular sieve, and alpha is a ratio of the intensity of an absorption peak in 3740cm<-1> in the FT-IR spectrum of the MoBeta zeolite molecular sieve to the intensity of an absorption peak in 3740cm<-1> in the FT-IR spectrum of the parent Beta zeolite molecular sieve. Compared with catalysts in the prior art, the catalyst provided by the invention has the advantages of obviously improved conversion rate of diaromatic and polycyclic aromatic hydrocarbons in a hydrocracking reaction, and obviously improved selectivity of ideal products.
Description
Technical field
The present invention is about a kind of hydrotreating catalyst and Synthesis and applications thereof.
Background technology
World's crude oil is heaviness, in poor quality increasingly, and sulfur content and arene content increase gradually, and the demand of clean fuel oil and high-quality industrial chemicals increases gradually.Hydrocracking, as one of the main technique of heavy oil lighting, is also the important technical uniquely directly producing clean fuel and high-quality industrial chemicals raw material lighting while.At present, how to realize aromatic hydrocarbons to maximize and change into fuel oil ideal composition or high-quality industrial chemicals and become one of difficult point that hydrocracking must capture.Such as:
20120352307.9 disclose a kind of hydrocracking catalyst containing multi-stage porous Beta molecular sieve, the carrier of this catalyst is made up of jointly multi-stage porous Beta molecular sieve, modified Y molecular sieve, aluminium oxide and amorphous aluminum silicide, hydrogenation active component is the oxide of W metal, W, and auxiliary agent is P or F.The feature of this catalyst has abundant meso-hole structure and all distributes with middle strong acid.
201110350783.2 disclose a kind of hydrocracking catalyst, the carrier that this catalyst is made up of modification Beta molecular sieve, Modified Zeolite Y, aluminium oxide and hydrogenation metal component, modification Beta molecular sieve be by crystallization after Beta molecular sieve pulp directly carry out ammonium exchange, de-template agent process after, first through hydrothermal treatment consists, by aluminum salt solution process, object is under the condition keeping Beta molecular sieve high-crystallinity, evenly remove part non-framework aluminum, optimize acid distribution and the pore size distribution of molecular sieve.
201110369112.0 disclose the catalyst that a kind of polycyclic aromatic hydrocarbon is converted into mononuclear aromatics, this catalyst comprises 34.5-60 % by weight FAU type zeolite and is selected from the mixture of at least one molecular sieve in MOR, BEA, MFI or MCM-22, and 39.5-65 % by weight at least one be selected from gama-alumina, η-aluminium oxide or boehmite is that binding agent and 0.05-0.9% are selected from least one metal in Pt, Pd or Ir.
The Efficient Conversion difficult point realizing aromatic hydrocarbons in hydrocracking process is to improve the selective and coke inhibiting of desired product, extending catalyst service life.The desired product of dicyclo and above aromatic conversion is the high added value such as benzene,toluene,xylene and BTX and the contour cetane value constituents of long side chain n-alkyl benzene.Raising desired product optionally key realizes hydrogenating function and working in coordination with and mating on cracking function high level.
Summary of the invention
The technical problem to be solved in the present invention is to provide hydrocracking catalyst that a kind of performance improved, the preparation method of this catalyst and application thereof.
The summary of the invention that the present invention relates to comprises:
1, a kind of hydrocracking catalyst, containing the carrier containing molecular sieve solid acid constituents, described molecular sieve solid acid constituents is the mixture comprising ZSM-5 molecular sieve and MoBeta molecular sieve, in described molecular sieve mixture, the ratio of the weight of ZSM-5 molecular sieve and Beta molecular sieve is 9:1 ~ 1:9, wherein, the n value of MoBeta molecular sieve is 0<n<1, n=I/ α I
0, characterize with FT-IR method, I is 3610cm in the FT-IR spectrogram of MoBeta type zeolite molecular sieve
-1absorption peak strength, I
0for 3610cm in the FT-IR spectrogram of the parent Beta type zeolite molecular sieve of MoBeta type zeolite molecular sieve
-1absorption peak strength, α is 3740cm in the FT-IR spectrogram of MoBeta type zeolite molecular sieve
-13740cm in the FT-IR spectrogram of absorption peak strength and parent Beta type zeolite molecular sieve
-1the ratio of absorption peak strength.
2, the catalyst according to 1, is characterized in that, in described molecular sieve mixture, the ratio of the weight of ZSM-5 molecular sieve and Beta molecular sieve is 4:1 ~ 1:1.
3, the catalyst according to 1, is characterized in that, the n value of described MoBeta molecular sieve is 0.3≤n≤0.8.
4, the catalyst according to 1, is characterized in that, with described MoBeta type zeolite molecular sieve for benchmark, in described MoBeta zeolite molecular sieve with the content of the molybdenum of oxide basis for 0.5-10 % by weight.
5, the catalyst according to 4, is characterized in that, with described MoBeta type zeolite molecular sieve for benchmark, in described MoBeta type zeolite molecular sieve with the content of the molybdenum of oxide basis for 1-9 % by weight.
6, the catalyst according to 1, it is characterized in that, hydrogenation active metals component in described catalyst is selected from least one VIII race's metal component and at least one VI B metal component, with oxide basis and with described catalyst for benchmark, the content of described VIII race's metal component is 1-10 % by weight, and the content of VI B race metal component is 5-50 % by weight.
7, the catalyst according to 6, it is characterized in that, described VIII race's metal component is selected from cobalt and/or nickel, VI B metal component is selected from molybdenum and/or tungsten, with oxide basis and with described catalyst for benchmark, the content of described VIII race's metal component is 1.5-6 % by weight, and the content of VI B race metal component is 10-40 % by weight.
8, the catalyst according to 1, is characterized in that, containing heat-resistant inorganic oxide matrix in described carrier, with described carrier for benchmark, the content of described heat-resistant inorganic oxide matrix is for being greater than 0 to being less than or equal to 99 % by weight.
9, the catalyst according to 8, it is characterized in that, described heat-resistant inorganic oxide matrix is selected from one or more in aluminium oxide, silica and silica-alumina, and with described carrier for benchmark, the content of described heat-resistant inorganic oxide matrix is 10-90 % by weight.
10, the catalyst according to 1 or 8, it is characterized in that, with described catalyst for benchmark, in described catalyst, the content of carrier is 45-90 % by weight, with the content of described VIII race's metal component of oxide basis for 1-10 % by weight, with the content of the described VI B race metal component of oxide basis for 5-50 % by weight.
11, the catalyst according to 10, it is characterized in that, with described catalyst for benchmark, in described catalyst, the content of carrier is 55-85 % by weight, with the content of described VIII race's metal component of oxide basis for 1.5-6 % by weight, with the content of the described VI B race metal component of oxide basis for 10-40 % by weight.
12, a kind of preparation method of hydrocracking catalyst, comprise preparation containing the carrier containing molecular sieve solid acid constituents, described molecular sieve solid acid constituents is the mixture comprising ZSM-5 molecular sieve and MoBeta molecular sieve, in described molecular sieve mixture, the ratio of the weight of ZSM-5 molecular sieve and Beta molecular sieve is 9:1 ~ 1:9, wherein, the n value of MoBeta molecular sieve is 0<n<1, n=I/ α I
0, characterize with FT-IR method, I is 3610cm in the FT-IR spectrogram of MoBeta type zeolite molecular sieve
-1absorption peak strength, I
0for 3610cm in the FT-IR spectrogram of the parent Beta type zeolite molecular sieve of MoBeta type zeolite molecular sieve
-1absorption peak strength, α is 3740cm in the FT-IR spectrogram of MoBeta type zeolite molecular sieve
-13740cm in the FT-IR spectrogram of absorption peak strength and parent Beta type zeolite molecular sieve
-1the ratio of absorption peak strength.
13, the method according to 12, is characterized in that, in described molecular sieve mixture, the ratio of the weight of ZSM-5 molecular sieve and Beta molecular sieve is 4:1 ~ 1:1; The n value of described MoBeta molecular sieve is 0.3≤n≤0.8.
14, the method according to 12, is characterized in that, with described MoBeta type zeolite molecular sieve for benchmark, in described MoBeta zeolite molecular sieve with the content of the molybdenum of oxide basis for 0.5-10 % by weight.
15, the method according to 14, is characterized in that, with described MoBeta type zeolite molecular sieve for benchmark, in described MoBeta type zeolite molecular sieve with the content of the molybdenum of oxide basis for 1-9 % by weight.
16, the method according to 12, it is characterized in that, the preparation method of described MoBeta type zeolite molecular sieve comprises: Beta type zeolite molecular sieve mixes with containing Mo compound by (1), obtain a kind of Beta type zeolite molecular sieve and the mixture containing Mo compound, with described MoBeta type zeolite molecular sieve for benchmark, the consumption of each component makes in final MoBeta type zeolite molecular sieve, with the molybdenum content of oxide basis for 0.5-10 % by weight; (2) mixture that step (1) obtains is enclosed lower high-temperature process in steam-laden atmosphere, it is 200-700 DEG C that the condition of described high-temperature process comprises sintering temperature, roasting time is 1-24 hour, steam-laden gas flow be 0.3-2 standard cubic meter/kilogram hour, obtain MoBeta type zeolite molecular sieve.
17, the method according to 16, is characterized in that, with described MoBeta type zeolite molecular sieve for benchmark, in described step (1), the consumption of each component makes in final MoBeta type zeolite molecular sieve, with the molybdenum content of oxide basis for 1-9 % by weight; It is 400-650 DEG C that the condition of the high-temperature process in described step (2) comprises sintering temperature, and roasting time is 2-12 hour, steam-laden gas flow be 0.6-1.5 standard cubic meter/kilogram hour.
18, the method according to 17, is characterized in that, containing diluent gas in described steam-laden atmosphere, wherein, the volume mixture ratio of described steam and diluent gas is 1:10-100.
19, the method according to 18, is characterized in that, described diluent gas is selected from hydrogen, nitrogen and gaseous mixture thereof, is preferably hydrogen, or is selected from the gaseous mixture of air and air and nitrogen; The volume mixture ratio of described steam and diluent gas is 1:20-80.
20, the method according to 12, it is characterized in that, described method comprises the step introducing hydrogenation active metals component in described carrier, hydrogenation active metals component in described hydrocracking catalyst is selected from least one VIII race's metal component and at least one VI B metal component, with oxide basis and with described catalyst for benchmark, the introduction volume of described VIII race's metal component makes the content of VIII race's metal component in final catalyst be 1-10 % by weight, and the introduction volume of described VI B race metal component makes the content of VI B race metal component in final catalyst be 5-50 % by weight.
21, the method according to 20, it is characterized in that, described VIII race's metal component is selected from cobalt and/or nickel, VI B metal component is selected from molybdenum and/or tungsten, with oxide basis and with described catalyst for benchmark, the introduction volume of described VIII race's metal component makes the content of VIII race's metal component in final catalyst be 1.5-6 % by weight, and the introduction volume of described VI B race metal component makes the content of VI B race metal component in final catalyst be 10-40 % by weight.
22, the method according to 12, it is characterized in that, described method comprises the step introducing heat-resistant inorganic oxide matrix in described carrier, with described carrier for benchmark, the introduction volume of described heat-resistant inorganic oxide matrix makes the content of heat-resistant inorganic oxide matrix in final carrier for being greater than 0 to being less than or equal to 99 % by weight.
23, the method according to 22, is characterized in that, with described carrier for benchmark, the introduction volume of described heat-resistant inorganic oxide matrix makes the content of heat-resistant inorganic oxide matrix in final carrier be 10-90 % by weight.
24, a method for hydrogen cracking, is included in by hydrocarbon ils and catalyst exposure under hydrocracking condition, wherein, and the catalyst that described catalyst provides for aforementioned 1-11.
The present invention is about in the description of molecular sieve, and the implication of described Beta (or MoBeta, ZSM-5 etc.) type zeolite molecular sieve, Beta (or MoBeta, ZSM-5 etc.) zeolite or Beta (or MoBeta, ZSM-5 etc.) molecular sieve is identical.
In the present invention, the 3610cm in the FT-IR spectrogram of described Beta zeolite
-1absworption peak refers to 3610 ± 10cm in FT-IR spectrogram
-1the absworption peak at place, this absworption peak belongs to the vibration absorption peak of Beta type zeolite acidity hydroxyl.3740cm in the FT-IR spectrogram of described Beta zeolite
-1absworption peak refers to the 3740cm in FT-IR spectrogram
-1± 10cm
-1the absworption peak at place, this absworption peak belongs to the vibration absorption peak of Beta type zeolite Si-OH.
Inventor finds, when with n=I/ α I
03610cm in FT-IR spectrogram before and after expression Beta type zeolite molecular sieve introducing Mo metal component
-1during the change of absorption peak strength, the intensity of the vibration performance absworption peak of this acid hydroxy group of the Mo-Beta type zeolite molecular sieve adopting method provided by the invention to prepare reduces.And the hydrogenation aromatic hydrocarbons of the catalyst adopting this Mo-Beta type zeolite molecular sieve to prepare is full and open loop, cracking performance significantly improve.
In the present invention, described Mo-Beta zeolite is a kind of 0<n<1, is preferably the Beta type zeolite of 0.3≤n≤0.8.Preferably, with described Mo-Beta type zeolite molecular sieve for benchmark (in the present invention, in Mo-Beta type zeolite molecular sieve molybdenum oxide content (mass fraction)=Mo-Beta type zeolite molecular sieve to be measured in measured value/(amount × butt of Mo-Beta type zeolite molecular sieve to be measured) of molybdenum oxide.Butt is testing sample ratio of weight before 600 DEG C of roastings weight after 4 hours and roasting under air atmosphere), in described Mo-Beta zeolite, the content of Mo is 0.5-10 % by weight, more preferably 1-9 % by weight.
Method to Beta type zeolite molecular sieve introducing Mo of the present invention comprises:
(1) Beta type zeolite molecular sieve is mixed with containing Mo compound, obtain a kind of Beta type zeolite molecular sieve and the mixture containing Mo compound;
(2) mixture that step (1) obtains is enclosed lower roasting in steam-laden atmosphere, obtain Mo-Beta type zeolite molecular sieve;
Wherein, in the described Mo-Beta type zeolite molecular sieve of butt for benchmark, in described step (1), the consumption of each component makes in final Mo-Beta type zeolite molecular sieve, preferably with the molybdenum content of oxide basis for 0.5-10 % by weight, further preferred with the molybdenum content of oxide basis for 1-6 % by weight; Described molybdate compound is preferably from oxide, the chloride or molybdate etc. of molybdenum; Roasting condition in described step (2) comprises: temperature is 200-700 DEG C, be preferably 400-650 DEG C, the time is 1-24 hour, is preferably 3-12 hour, steam-laden gas flow be 0.3-2 standard cubic meter/kilogram hour, be preferably 0.6-1.5 standard cubic meter/kilogram hour.
In preceding method, containing diluent gas in preferred described steam-laden atmosphere, the example that can select of described diluent gas as: be selected from hydrogen, nitrogen and gaseous mixture thereof, or be selected from the gaseous mixture of air and air and nitrogen, wherein be preferably hydrogen, wherein, the volume mixture ratio of described steam and diluent gas is preferably 1:10-100, more preferably 1:20-80.
In the present invention, described ZSM-5 is not particularly limited, can is commercially available commodity or is prepared by arbitrary prior art.
According to catalyst provided by the invention, wherein said carrier can be made into the various article shaped being easy to operate depending on different requirement, such as microballoon, spherical, tablet or bar shaped etc.This is shaping can method routinely carry out, such as, by the described composite molecular screen containing ZSM-5 zeolite molecular sieve and MoBeta type zeolite molecular sieve, containing or not containing heat-resistant inorganic oxide extruded moulding and the preparation of the method for roasting.When extrusion molding, appropriate extrusion aid and/or adhesive can be added in material to be formed, then extrusion molding.The kind of described extrusion aid, peptizing agent and consumption are conventionally known to one of skill in the art, such as common extrusion aid can be selected from one or more in sesbania powder, methylcellulose, starch, polyvinyl alcohol, PVOH, and described peptizing agent can be selected from one or more in inorganic acid, organic acid.
According to catalyst provided by the invention, hydrogenation active metals component is wherein that this type of catalyst routine is selected, and such as, comprises at least one and is selected from VIII race's metal component and at least one is selected from VI B race metal component.Preferred metal component of group VIII is cobalt and/or nickel, and metal component of group VIB is molybdenum and/or tungsten.With oxide basis and with described catalyst for benchmark, the content of described VIII race's metal component is preferably 1-10 % by weight, more preferably 1.5-6 % by weight, and the content of described VI B race metal component is preferably 5-50 % by weight, more preferably 10-40 % by weight.The present invention, when the content of calculating VI B race metal component, comprises and being counted by the Mo in MoBeta molecular sieve.
Be enough under the prerequisite that described hydrogenation active metals component is carried on described carrier, the present invention is not particularly limited described carrying method, preferred method is infusion process, comprises the dipping solution of preparation containing the compound of described metal, afterwards with the carrier described in this solution impregnation.Described dipping method is conventional method, such as, can be excessive immersion stain, hole saturation infusion process.Wherein, by the regulation and control of the concentration of the solution to metallic components, consumption or carrier consumption, can prepare the described catalyst of specifying content, this is those skilled in the art's institute's easy understand and realization.
According to the present invention, after described metal impregnation step completes, optionally the steps such as drying, roasting or not roasting can be carried out.The condition of described drying and roasting is all conventional, and such as, baking temperature is 100-300 DEG C, and be preferably 100-280 DEG C, drying time is 1-12 hour, is preferably 2-8 hour; Sintering temperature is 350-550 DEG C, and be preferably 400-500 DEG C, roasting time is 1-10 hour, is preferably 2-8 hour.
One or more in the described soluble compound be selected from containing the metal component compound being selected from VI B race in them, as one or more in molybdenum oxide, molybdate, paramolybdate, preferably molybdenum oxide, ammonium molybdate, ammonium paramolybdate wherein; One or more in tungstates, metatungstate, ethyl metatungstate, preferably ammonium metatungstate, ethyl ammonium metatungstate wherein.Described containing the compound being selected from VIII race's metal component be selected from their soluble compound one or more, as one or more in the soluble complexes of cobalt nitrate, cobalt acetate, basic cobaltous carbonate, cobalt chloride and cobalt, be preferably cobalt nitrate, basic cobaltous carbonate; One or more in the soluble complexes of nickel nitrate, nickel acetate, basic nickel carbonate, nickel chloride and nickel, are preferably nickel nitrate, basic nickel carbonate.
According to catalyst provided by the invention, can also not affect containing any the material that the material that the invention provides catalyst catalytic performance maybe can improve catalyst catalytic performance provided by the invention.One or both as introduced in the component such as phosphorus, titanium, be benchmark in element and with catalyst, the introduction volume of above-mentioned auxiliary agent is 0-10 % by weight, is preferably 0.5-5 % by weight.
When in described catalyst also containing one or both components be selected from the components such as phosphorus, titanium or silicon time, the described introducing method being selected from the component such as phosphorus, titanium is conventional method, as can be by containing as described in the compound of auxiliary agent directly mix with solid acid component, boehmite, shaping and roasting; Can be by the compound containing described auxiliary agent be mixed with containing the compound of hydrogenation active metals component after mixed solution with described carrier contact; Can also be by after independent for the compound containing auxiliary agent obtain solution with described carrier contact and roasting.When auxiliary agent and hydrogenation active metals introduce described carrier respectively, preferably first use containing auxiliary compound solution and described carrier contact and roasting, contact with the solution of the compound containing hydrogenation active metals component more afterwards, such as by the method for dipping, described sintering temperature is 250-600 DEG C, be preferably 350-500 DEG C, roasting time is 2-8 hour, is preferably 3-6 hour.
Can also containing the organic compound be selected from containing one or more in oxygen or organic compounds containing nitrogen in catalyst provided by the invention, preferred oxygen-containing organic compound is selected from one or more in Organic Alcohol and organic acid; Preferred organic compounds containing nitrogen is selected from one or more in organic amine.Such as, oxygen-containing organic compound can enumerate ethylene glycol, glycerine, polyethylene glycol (molecular weight is 200-1500), diethylene glycol, butanediol, acetic acid, maleic acid, oxalic acid, aminotriacetic acid, 1, one or more in 2-CDTA, citric acid, tartaric acid, malic acid, organic compounds containing nitrogen can be ethylenediamine, EDTA and ammonium salt thereof.Described organic compound with the mol ratio of the group VIII of oxide basis and group vib metal component sum for 0.03-2, be preferably 0.08-1.5.
According to the conventional method in this area, described hydrotreating catalyst before the use, usually can be in presence of hydrogen, presulfurization is carried out with sulphur, hydrogen sulfide or sulfur-bearing raw material at the temperature of 140-370 DEG C, this presulfurization can be carried out outside device also can be In-situ sulphiding in device, and the active metal component of its load is converted into metal sulfide component.
In process for hydrocracking of hydrocarbonaceous provided by the invention, to described hydrocracking reaction condition without any special restriction, common reaction condition can be adopted, such as can enumerate that reaction temperature is 200-420 DEG C, more preferably 220-400 DEG C, pressure is 2-18 MPa, more preferably 2-15 MPa, liquid hourly space velocity (LHSV) 0.3-10 hour
-1, more preferably 0.3-5 hour
-1, hydrogen to oil volume ratio is 50-5000, more preferably 50-4000.
The device of described hydrotreatment reaction can fill in device in any reaction being enough to make described feedstock oil react with described catalyst exposure at hydrotreating reaction conditions and carry out, such as, at described fixed bed reactors, carry out in moving-burden bed reactor or fluidized bed reactor.
Compared with prior art, when the invention provides catalyst for hydrocracking reaction process, in raw material, the conversion of dicyclo and above polycyclic aromatic hydrocarbon and the selective of desired product etc. significantly improve.The various different hydrocarbon oil crude material of processing can be directly used in, to carry out hydro-upgrading to it.It is oily that described hydrocarbon oil crude material comprises various heavy mineral oil or artificial oil or their mixed fraction, such as, one or more in crude oil, distillate, solvent-refined oil, slack wax, sweat oil, Fischer-Tropsch synthesis oil, liquefied coal coil, frivolous coal tar and heavy deasphalted oil are selected from.Be particularly suitable for being rich in the hydrocracking of aromatic hydrocarbons oil product or the hydro-upgrading of poor ignition quality fuel.
Detailed description of the invention
The present invention will be further described for example below.
Framework of molecular sieve hydroxyl is recorded by Fourier infrared (FT-IR), first by sample roasting 2h at 350 DEG C, keeps vacuum 10
-6pa, is then down to the hydroxyl INFRARED SPECTRUM of room temperature measuring molecular sieve.In MoY molecular sieve, Mo content is recorded by x ray fluorescence spectrometry (XRF), and experimental technique is sieve sample compression molding, rhodium target, laser voltage 50kV, laser current 50mA, adopts external standard method to carry out semi-quantitative analysis.
Embodiment 1
Get 200.0 grams of Beta molecular sieves (Chang Ling catalyst branch company product, silicon/aluminium 30, butt 0.81) to grind in mortar with 0.8 gram of molybdenum trioxide, mix.Then be placed in tube furnace flat-temperature zone, in 420 DEG C of roastings 24 hours under hydrogen and steam atmosphere, gas flow is wherein 0.5m
3the mixed proportion of/(kgh), steam and hydrogen is 1:40.Obtain Mo modification Beta type molecular sieve MoBeta1, MoO in Mo-Beta1
3content and n value list in table 1.
By 200.0 grams of boehmites (Chang Ling catalyst branch company product, butt 0.71) and 19.1 grams of ZSM-5 (Chang Ling catalyst branch company products, silicon/aluminium 60, butt 0.94), 159.1 grams of MoBeta1 sample mix, be extruded into the cloverleaf pattern bar that circumscribed circle diameter is 1.6 millimeters, wet bar, in 150 DEG C of dry 3h, 550 DEG C of roasting 3h, obtains carrier Z1.
Get 100.2 grams of carrier Z1, with 95 milliliters containing MoO
3the mixed solution of 182.1 grams per liters, NiO78.9 grams per liter ammonium heptamolybdate and nickel nitrate floods 4 hours, in 150 DEG C of dry 3h, 400 DEG C of roastings 3 hours, obtains catalyst C1.Take catalyst as benchmark, form after the roasting of C1 catalyst (active metal component adopts X-ray fluorescence spectra analysis (XRF) to measure, lower same) as shown in table 2.
Embodiment 2
Get 200.0 grams of Beta molecular sieves (Chang Ling catalyst branch company product, silicon/aluminium 30, butt 0.81) to grind in mortar with 8.5 grams of molybdenum trioxides, mix.Then be placed in tube furnace flat-temperature zone, in 450 DEG C of roastings 4 hours under hydrogen and steam atmosphere, gas flow is wherein 0.8m
3the mixed proportion of/(kgh), steam and hydrogen is 1:30.Obtain Mo modification Beta type molecular sieve MoBeta2, MoO in MoBeta2
3content and n value list in table 1.。
By 200.0 grams of boehmites (Chang Ling catalyst branch company product, butt 0.71) with 9.8 grams of BZSM-5 (with embodiment 1), 36.6 grams of MoBeta2 sample mix, be extruded into the cloverleaf pattern bar that circumscribed circle diameter is 1.6 millimeters, wet bar, in 150 DEG C of dry 3h, 550 DEG C of roasting 3h, obtains carrier Z2.
Get 101.0 grams of carrier Z2, with 78 milliliters containing MoO
3648.9 grams per liters, NiO128.2 grams per liter, P
2o
564.1 grams per liters, the nickel of 138.5 grams per liter citric acids, molybdenum complex solution flood 4 hours, in 150 DEG C of dryings 3 hours, obtain catalyst C2.Take catalyst as benchmark, form as shown in table 2 after the roasting of C2 catalyst.
Embodiment 3
By 200.0 grams of boehmites (Chang Ling catalyst branch company product, butt 0.71) with 52.6 grams of ZSM-5 (with embodiment 1), 49.2 grams of MoBeta2 sample mix, be extruded into the cloverleaf pattern bar that circumscribed circle diameter is 1.6 millimeters, wet bar, in 150 DEG C of dry 3h, 550 DEG C of roasting 3h, obtains carrier Z3.
Get 101.7 grams of carrier Z3, with 90 milliliters containing MoO
3277.4 grams per liters, NiO44.4 grams per liter, P
2o
529.7 grams per liters, the nickel of 48.0 grams per liter citric acids, molybdenum complex solution flood 4 hours, in 150 DEG C of dryings 3 hours, obtain catalyst C3.Take catalyst as benchmark, form as shown in table 2 after the roasting of C3 catalyst.
Embodiment 4
Get 200.0 grams of Beta molecular sieves (Chang Ling catalyst branch company product, silicon/aluminium 30, butt 0.81) to grind in mortar with 14.1 grams of molybdenum trioxides, mix.Then be placed in tube furnace flat-temperature zone, in 450 DEG C of roastings 8 hours under hydrogen and steam atmosphere, gas flow is wherein 0.8m
3the mixed proportion of/(kgh), steam and hydrogen is 1:30.Obtain Mo modification Beta type molecular sieve MoBeta3, MoO in MoBeta3
3content and n value list in table 1.
By 200.0 grams of boehmites (Chang Ling catalyst branch company product, butt 0.71) with 54.8 grams of ZSM-5 (with embodiment 1), 50.5 grams of MoBeta3 sample mix, be extruded into the cloverleaf pattern bar that circumscribed circle diameter is 1.6 millimeters, wet bar, in 150 DEG C of dry 3h, 550 DEG C of roasting 3h, obtains carrier Z3.
Get 103.3 grams of carrier Z4, with 88 milliliters containing MoO
3265.5 grams per liters, NiO45.5 grams per liter, P
2o
530.3 grams per liters, the nickel of 49.1 grams per liter citric acids, molybdenum complex solution flood 4 hours, in 150 DEG C of dryings 3 hours, obtain catalyst C4.Take catalyst as benchmark, form as shown in table 2 after the roasting of C4 catalyst.
Embodiment 5
By 200.0 grams of boehmites (Chang Ling catalyst branch company product, butt 0.71) and 69.7 grams of Beta (Chang Ling catalyst branch company products, silicon/aluminium 30, butt 0.81), 16.1 grams of MoBeta3 sample mix, be extruded into the cloverleaf pattern bar that circumscribed circle diameter is 1.6 millimeters, wet bar, in 150 DEG C of dry 3h, 550 DEG C of roasting 3h, obtains carrier Z5.
Get 102.9 grams of carrier Z5, with 90 milliliters containing MoO
3541.9 grams per liters, NiO101.0 grams per liter, P
2o
555.6 grams per liters, the nickel of 109.2 grams per liter citric acids, molybdenum complex solution flood 4 hours, in 150 DEG C of dryings 3 hours, obtain catalyst C5.Take catalyst as benchmark, form as shown in table 2 after the roasting of C5 catalyst.
Embodiment 6
Get 200.0 grams of Beta molecular sieves (Chang Ling catalyst branch company product, silicon/aluminium 30, butt 0.81) to grind in mortar with 14.1 grams of molybdenum trioxides, mix.Then be placed in tube furnace flat-temperature zone, in 450 DEG C of roastings 12 hours under air and steam atmosphere, gas flow is wherein 1.2m
3the mixed proportion of/(kgh), steam and air is 1:15.Obtain Mo modification Beta type molecular sieve MoBeta4, MoO in MoBeta4
3content and n value list in table 1.
By 200.0 grams of boehmites (Chang Ling catalyst branch company product, butt 0.71) with 73.0 grams of ZSM-5 (with embodiment 1), 33.7 grams of MoBeta4 sample mix, be extruded into the cloverleaf pattern bar that circumscribed circle diameter is 1.6 millimeters, wet bar, in 150 DEG C of dry 3h, 550 DEG C of roasting 3h, obtains carrier Z6.
Get 103.3 grams of carrier Z4, with 88 milliliters containing MoO
3265.5 grams per liters, NiO45.5 grams per liter, P
2o
530.3 grams per liters, the nickel of 49.1 grams per liter citric acids, molybdenum complex solution flood 4 hours, in 150 DEG C of dryings 3 hours, obtain catalyst C6.Take catalyst as benchmark, form as shown in table 2 after the roasting of C6 catalyst.
Embodiment 7
Get 200.0 grams of Beta molecular sieves (Chang Ling catalyst branch company product, silicon/aluminium 30, butt 0.81) to grind in mortar with 26.8 grams of molybdenum pentachlorides, mix.Then be placed in tube furnace flat-temperature zone, in 300 DEG C of roastings 24 hours under nitrogen and steam atmosphere, gas flow is wherein 1.2m
3the mixed proportion of/(kgh), steam and nitrogen is 1:15.Obtain Mo modification Beta type molecular sieve MoBeta5, MoO in MoBeta5
3content and n value list in table 1.
By 200.0 grams of boehmites (Chang Ling catalyst branch company product, butt 0.71), 46.7 grams of silica-alumina (Chang Ling catalyst branch company products, butt 76%) with 28.2 grams of ZSM-5 (with embodiment 1), 52.2 grams of MoBeta sample mix, be extruded into the cloverleaf pattern bar that circumscribed circle diameter is 1.6 millimeters, wet bar, in 150 DEG C of dry 3h, 550 DEG C of roasting 3h, obtains carrier Z7.
Get 102.3 grams of carrier Z7, with 95 milliliters containing MoO
3the mixed solution of 160.0 grams per liters, NiO78.9 grams per liter ammonium heptamolybdate and nickel nitrate floods 4 hours, in 150 DEG C of dry 3h, 400 DEG C of roastings 3 hours, obtains catalyst C7.Take catalyst as benchmark, form as shown in table 2 after the roasting of C7 catalyst.
Embodiment 8
Get 200.0 grams of Beta molecular sieves (Chang Ling catalyst branch company product, silicon/aluminium 30, butt 0.81) to grind in mortar with 14.1 grams of molybdenum trioxides, mix.Then be placed in tube furnace flat-temperature zone, in 300 DEG C of roastings 8 hours under steam atmosphere, gas flow is wherein 0.4m
3/ (kgh).Obtain Mo modification Beta type molecular sieve MoBeta6, MoO in MoBeta6
3content and n value list in table 1.
By 200.0 grams of boehmites (Chang Ling catalyst branch company product, butt 0.71), 122.0 grams of ZSM-5 (with embodiment 1) and 12.6 grams of MoBeta6 sample mix, be extruded into the shape cylindrical bar that diameter is 1.6 millimeters, wet bar, in 150 DEG C of dry 3h, 550 DEG C of roasting 3h, obtains carrier Z8.
Get 103.9 grams of carrier Z8, with 90 milliliters containing MoO
3the mixed solution of 151.1 grams per liters, NiO83.3 grams per liter ammonium heptamolybdate and nickel nitrate floods 4 hours, in 150 DEG C of dry 3h, 400 DEG C of roastings 3 hours, obtains catalyst C8.Take catalyst as benchmark, form as shown in table 2 after the roasting of C8 catalyst.
Embodiment 9
Get 150.0 grams of ZSM-5 (with embodiment 1) molecular sieve to mix with 93.0 grams of MoBeta1 molecular sieves, compression molding on DY-20 powder compressing machine, pressure is 10MPa, and 150 DEG C of dryings 3 hours, prepare carrier Z9.
Get 105.2 grams of Z9, with 75 milliliters containing MoO
3286.2 grams per liters, NiO53.3 grams per liter, P
2o
535.6 grams per liters, the nickel of 57.6 grams per liter citric acids, molybdenum complex solution flood 4 hours, in 150 DEG C of dryings 3 hours, obtain catalyst C9.Take catalyst as benchmark, form as shown in table 2 after the roasting of C9 catalyst.
Comparative example 1
Get 180.0 grams of Beta type molecular sieves (Chang Ling catalyst branch company product, butt 0.75) with the solution iso volumetric impregnation 4 hours containing 11.7 grams of ammonium heptamolybdates, 150 DEG C of dryings 3 hours, 450 DEG C of roastings 3 hours, obtain the Mo modification Beta type molecular sieve DMoBeta adopting infusion process to prepare.Obtain Mo modification Beta type molecular sieve DMoBeta, MoO in DMoBeta
3content and n value list in table 1.
By 200.0 grams of boehmites (Chang Ling catalyst branch company product, butt 0.71), 78.9 grams of ZSM-5 (with embodiment 1) and the mixing of 94.6 grams of DMoBeta molecular sieves, be extruded into the cloverleaf pattern bar that circumscribed circle diameter is 1.6 millimeters, wet bar, in 150 DEG C of dry 3h, 550 DEG C of roasting 3h, obtains carrier DZ1.
Get 100.0 grams of carrier DZ1, with 90 milliliters containing MoO
3287.3 grams per liters, NiO44.4 grams per liter, P
2o
529.7 grams per liters, the nickel of 48.0 grams per liter citric acids, molybdenum complex solution flood 4 hours, in 150 DEG C of dryings 3 hours, obtain catalyst DC1.Take catalyst as benchmark, form as shown in table 2 after the roasting of DC1 catalyst.
Table 1Mo modification Beta molecular sieve composition information
Table 2 carrier and catalyst composition information
Embodiment 10-12
The following examples illustrate the performance of catalyst provided by the invention.
With the naphthane of purity 99% for raw material (analyzing pure), miniature fixed bed is evaluated the naphthane reactivity worth of catalyst C3, C4, C6 provided by the invention, loaded catalyst is 1.2 grams, and reaction condition is 330 DEG C ~ 390 DEG C, pressure 4.0MPa.Provide following two performance indications (conversion ratio, BTX are selective) for carrying out contrast better and define.With the reaction result of reference catalyst DC1 for absolutely, calculate the relative conversion of different catalysts under same reaction temperature, and under same conversion the relative S of different catalysts
bTXvalue, the results are shown in Table 3.
Comparative example 2
Adopt and evaluate DC1 with embodiment 10-12 same procedure, the results are shown in Table 3.
The naphthane hydrocracking evaluation result of table 3 catalyst
Table 3 result shows, compared with comparative catalyst DC1: the relative conversion that the invention provides patent naphthane improves 12% ~ 23%; Under same conversion, the selective raising 37% ~ 48% of relative BTX.
Claims (24)
1. a hydrocracking catalyst, containing the carrier containing molecular sieve solid acid constituents, described molecular sieve solid acid constituents is the mixture comprising ZSM-5 molecular sieve and MoBeta molecular sieve, in described molecular sieve mixture, the ratio of the weight of ZSM-5 molecular sieve and MoBeta molecular sieve is 9:1 ~ 1:9, wherein, the n value of MoBeta molecular sieve is 0<n<1, n=I/ α I
0, characterize with FT-IR method, I is 3610cm in the FT-IR spectrogram of MoBeta type zeolite molecular sieve
-1absorption peak strength, I
0for 3610cm in the FT-IR spectrogram of the parent Beta type zeolite molecular sieve of MoBeta type zeolite molecular sieve
-1absorption peak strength, α is 3740cm in the FT-IR spectrogram of MoBeta type zeolite molecular sieve
-13740cm in the FT-IR spectrogram of absorption peak strength and parent Beta type zeolite molecular sieve
-1the ratio of absorption peak strength.
2. the catalyst according to 1, is characterized in that, in described molecular sieve mixture, the ratio of the weight of ZSM-5 molecular sieve and Beta molecular sieve is 4:1 ~ 1:1.
3. the catalyst according to 1, is characterized in that, the n value of described MoBeta molecular sieve is 0.3≤n≤0.8.
4. the catalyst according to 1, is characterized in that, with described MoBeta type zeolite molecular sieve for benchmark, in described MoBeta zeolite molecular sieve with the content of the molybdenum of oxide basis for 0.5-10 % by weight.
5. the catalyst according to 4, is characterized in that, with described MoBeta type zeolite molecular sieve for benchmark, in described MoBeta type zeolite molecular sieve with the content of the molybdenum of oxide basis for 1-9 % by weight.
6. the catalyst according to 1, it is characterized in that, hydrogenation active metals component in described catalyst is selected from least one VIII race's metal component and at least one VI B metal component, with oxide basis and with described catalyst for benchmark, the content of described VIII race's metal component is 1-10 % by weight, and the content of VI B race metal component is 5-50 % by weight.
7. the catalyst according to 6, it is characterized in that, described VIII race's metal component is selected from cobalt and/or nickel, VI B metal component is selected from molybdenum and/or tungsten, with oxide basis and with described catalyst for benchmark, the content of described VIII race's metal component is 1.5-6 % by weight, and the content of VI B race metal component is 10-40 % by weight.
8. the catalyst according to 1, is characterized in that, containing heat-resistant inorganic oxide matrix in described carrier, with described carrier for benchmark, the content of described heat-resistant inorganic oxide matrix is for being greater than 0 to being less than or equal to 99 % by weight.
9. the catalyst according to 8, it is characterized in that, described heat-resistant inorganic oxide matrix is selected from one or more in aluminium oxide, silica and silica-alumina, and with described carrier for benchmark, the content of described heat-resistant inorganic oxide matrix is 10-90 % by weight.
10. the catalyst according to 1 or 8, it is characterized in that, with described catalyst for benchmark, in described catalyst, the content of carrier is 45-90 % by weight, with the content of described VIII race's metal component of oxide basis for 1-10 % by weight, with the content of the described VI B race metal component of oxide basis for 5-50 % by weight.
11. catalyst according to 10, it is characterized in that, with described catalyst for benchmark, in described catalyst, the content of carrier is 55-85 % by weight, with the content of described VIII race's metal component of oxide basis for 1.5-6 % by weight, with the content of the described VI B race metal component of oxide basis for 10-40 % by weight.
The preparation method of 12. 1 kinds of hydrocracking catalysts, comprise preparation containing the carrier containing molecular sieve solid acid constituents, described molecular sieve solid acid constituents is the mixture comprising ZSM-5 molecular sieve and MoBeta molecular sieve, in described molecular sieve mixture, the ratio of the weight of ZSM-5 molecular sieve and Beta molecular sieve is 9:1 ~ 1:9, wherein, the n value of MoBeta molecular sieve is 0<n<1, n=I/ α I
0, characterize with FT-IR method, I is 3610cm in the FT-IR spectrogram of MoBeta type zeolite molecular sieve
-1absorption peak strength, I
0for 3610cm in the FT-IR spectrogram of the parent Beta type zeolite molecular sieve of MoBeta type zeolite molecular sieve
-1absorption peak strength, α is 3740cm in the FT-IR spectrogram of MoBeta type zeolite molecular sieve
-13740cm in the FT-IR spectrogram of absorption peak strength and parent Beta type zeolite molecular sieve
-1the ratio of absorption peak strength.
13. methods according to 12, it is characterized in that, in described molecular sieve mixture, the ratio of the weight of ZSM-5 molecular sieve and Beta molecular sieve is 4:1 ~ 1:1; The n value of described MoBeta molecular sieve is 0.3≤n≤0.8.
14. methods according to 12, is characterized in that, with described MoBeta type zeolite molecular sieve for benchmark, in described MoBeta zeolite molecular sieve with the content of the molybdenum of oxide basis for 0.5-10 % by weight.
15. methods according to 14, is characterized in that, with described MoBeta type zeolite molecular sieve for benchmark, in described MoBeta type zeolite molecular sieve with the content of the molybdenum of oxide basis for 1-9 % by weight.
16. methods according to 12, it is characterized in that, the preparation method of described MoBeta type zeolite molecular sieve comprises: Beta type zeolite molecular sieve mixes with containing Mo compound by (1), obtain a kind of Beta type zeolite molecular sieve and the mixture containing Mo compound, with described MoBeta type zeolite molecular sieve for benchmark, the consumption of each component makes in final MoBeta type zeolite molecular sieve, with the molybdenum content of oxide basis for 0.5-10 % by weight; (2) mixture that step (1) obtains is enclosed lower high-temperature process in steam-laden atmosphere, it is 200-700 DEG C that the condition of described high-temperature process comprises sintering temperature, roasting time is 1-24 hour, steam-laden gas flow be 0.3-2 standard cubic meter/kilogram hour, obtain MoBeta type zeolite molecular sieve.
17. methods according to 16, it is characterized in that, with described MoBeta type zeolite molecular sieve for benchmark, in described step (1), the consumption of each component makes in final MoBeta type zeolite molecular sieve, with the molybdenum content of oxide basis for 1-6 % by weight; It is 400-650 DEG C that the condition of the high-temperature process in described step (2) comprises sintering temperature, and roasting time is 2-12 hour, steam-laden gas flow be 0.6-1.5 standard cubic meter/kilogram hour.
18. methods according to 17, is characterized in that, containing diluent gas in described steam-laden atmosphere, wherein, the volume mixture ratio of described steam and diluent gas is 1:10-100.
19. methods according to 18, it is characterized in that, described diluent gas is selected from hydrogen, nitrogen and gaseous mixture thereof, is preferably hydrogen, or is selected from the gaseous mixture of air and air and nitrogen; The volume mixture ratio of described steam and diluent gas is 1:20-80.
20. methods according to 12, it is characterized in that, described method comprises the step introducing hydrogenation active metals component in described carrier, hydrogenation active metals component in described hydrocracking catalyst is selected from least one VIII race's metal component and at least one VI B metal component, with oxide basis and with described catalyst for benchmark, the introduction volume of described VIII race's metal component makes the content of VIII race's metal component in final catalyst be 1-10 % by weight, and the introduction volume of described VI B race metal component makes the content of VI B race metal component in final catalyst be 5-50 % by weight.
21. methods according to 20, it is characterized in that, described VIII race's metal component is selected from cobalt and/or nickel, VI B metal component is selected from molybdenum and/or tungsten, with oxide basis and with described catalyst for benchmark, the introduction volume of described VIII race's metal component makes the content of VIII race's metal component in final catalyst be 1.5-6 % by weight, and the introduction volume of described VI B race metal component makes the content of VI B race metal component in final catalyst be 10-40 % by weight.
22. methods according to 12, it is characterized in that, described method comprises the step introducing heat-resistant inorganic oxide matrix in described carrier, with described carrier for benchmark, the introduction volume of described heat-resistant inorganic oxide matrix makes the content of heat-resistant inorganic oxide matrix in final carrier for being greater than 0 to being less than or equal to 99 % by weight.
23. methods according to 22, it is characterized in that, with described carrier for benchmark, the introduction volume of described heat-resistant inorganic oxide matrix makes the content of heat-resistant inorganic oxide matrix in final carrier be 10-90 % by weight.
24. 1 kinds of method for hydrogen cracking, are included in by hydrocarbon ils and catalyst exposure under hydrocracking condition, wherein, and the catalyst that described catalyst provides for aforementioned 1-11.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022083526A1 (en) | 2020-10-19 | 2022-04-28 | 中国石油化工股份有限公司 | Chemical hydrocracking catalyst, preparation method therefor, and application thereof |
| CN116064132A (en) * | 2021-10-29 | 2023-05-05 | 中国石油化工股份有限公司 | Diesel catalytic separation method |
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| WO2022083526A1 (en) | 2020-10-19 | 2022-04-28 | 中国石油化工股份有限公司 | Chemical hydrocracking catalyst, preparation method therefor, and application thereof |
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| CN116064132B (en) * | 2021-10-29 | 2024-05-07 | 中国石油化工股份有限公司 | Diesel catalytic separation method |
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