CN1169915C - Preparation method of rare earth contained hydrocracking catalyst - Google Patents
Preparation method of rare earth contained hydrocracking catalyst Download PDFInfo
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- CN1169915C CN1169915C CNB01123766XA CN01123766A CN1169915C CN 1169915 C CN1169915 C CN 1169915C CN B01123766X A CNB01123766X A CN B01123766XA CN 01123766 A CN01123766 A CN 01123766A CN 1169915 C CN1169915 C CN 1169915C
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Abstract
The present invention provides a preparation method of a rare earth containing hydrocracking catalyst, which is characterized in that the method comprises: an alumina precursor and/or amorphous silicon-aluminum and a water solution of rare earth salt are mixed and then dried so that 1 to 15 wt% of rare earth measured by RE2O3 is contained in the alumina precursor and/or the amorphous silicon-aluminum; the obtained rare earth containing alumina precursor and/or the obtained rare earth containing amorphous silicon-aluminum are mixed with a molecular sieve, and a peptizing agent is added, kneaded or extruded to form strips, shaped, dried and calcined to obtain a shaped catalyst carrier; required quantities of hydrogenated active metal constituents are loaded on the obtained catalyst carrier with the conventional method. The rare earth content of the catalyst can reach the required level with the method of the present invention, and simultaneously, the present invention has the advantage of simple operation method.
Description
Technical field
The present invention relates to a kind of preparation method of petroleum hydrocarbon hydrocracking catalyst.
Technical background
Hydrocracking is to depress at higher hydrogen branch, and hydrocarbon molecules and hydrogen carry out cracking and hydrogenation reaction at catalyst surface, generates the conversion process than small molecules.The main raw material that hydrocracking is processed is a heavy distillate, comprises catalytic cracking turning oil and coker distillate etc., and product mainly is the high-quality oil product, particularly production high-quality aviation kerosene and low freezing point diesel fuel.Hydrocracking has the strong characteristics of adaptability to raw material, can adopt various inferior raw materials, as coker distillate, catalytic cracking circulation wet goods, and light-end products yield height, quality are good, flexibility of operation is big, different operational conditions be can adopt, kerosene, diesel oil, gasoline direct produced as required to iso-pentane and isohexane etc.Therefore, the shared proportion in petroleum refining process of hydrocracking in recent years is increasing, particularly because to the attention of environmental protection, the requirement of oil fuel is improved gradually, hydrocracking technology is owing to can provide high-quality, low-sulfur, low nitrogen fuel to be subjected to people's favor more day by day.
The key of hydrocracking technology is exploitation and the various types of catalyzer of application.Hydrocracking catalyst is typical dual-function catalyst, is made up of cracking function constituent element (acid carrier) and hydrogenating function constituent element (metal component), and acid carrier mainly contains SiO
2-Al
2O
3, SiO
2Amorphous component and molecular sieves such as-MgO; Metal component is mainly elementary composition by VIII family and VI-B family, can be divided into precious metal (Pt, Pd) and base metal (Ni, Co, Mo, W) two classes, has ancillary components such as tamanori, auxiliary agent in addition.
Although on raising activity of such catalysts, selectivity, bigger progress is arranged for many years, obtained bigger success from improving acidity of catalyst component aspect, have numerous catalyzer to drop into industrial application, but the performance of further improving acidic components is still the direction of further research.
For activity and the selectivity of improving hydrocracking catalyst, more is to the modification in addition of its used zeolite.Known method of modifying comprises: change the positively charged ion of zeolite and improve the silica alumina ratio of zeolite by the framework modification of zeolite by ion-exchange, the former mainly is exchanged rare earth element and alkaline-earth metal; Low, the lattice constant of aluminium content reduces in the zeolite of a kind of method of modifying gained in back, and the zeolite framework silica alumina ratio improves, thereby has reduced sour density, has improved strength of acid, has improved thermostability and hydrothermal stability.Compare with preceding a kind of method technology simple mutually.
Rare-earth-containing molecular sieve is widely used in petroleum refining catalyst, and the adding of rare earth component can improve the performance of catalyzer effectively, and wherein using maximum is rare earth Y type molecular sieve and the ZSM-5 that contains rare earth.
Because the Y zeolite of rare earth exchanged is wideer than the strength of acid distribution of corresponding HY, stronger acid site occurred, thereby improved activity of such catalysts, so rare earth Y type molecular sieve (REY) is widely used in the catalytic cracking catalyst.The such method of general employing is introduced rare earth element in the catalyzer: prepare suitable NaY molecular sieve earlier; With the aqueous solution exchange that contains rare earth; High-temperature roasting gained molecular sieve; Rare earth exchanged and high-temperature roasting again is till the rare earth content of exchange reaches requirement.
United States Patent (USP) 5,464,527 have described a kind of preparation method who contains the hydrocracking catalyst of rare earth, wherein with molecular sieve elder generation decationized Y sieve, be prepared into Rare Earth Y with rare earth ion exchanged again, the method for preparing catalyst according to routine is prepared into hydrocracking catalyst then.
USP4,309,277 have described a kind of preparation method of rare earth contained hydrocracking catalyst, adopt the molecular sieve of high oxidation sodium content and the support of the catalyst that aluminum oxide is prepared moulding, fall sodium then and carry out rare earth exchanged and roasting, make hydrocracking catalyst in conjunction with last hydrogenation metal constituent element again.
Comprehensive prior art, the introducing that contains the hydrocracking catalyst middle-weight rare earths of rare earth generally all is by the skeleton positively charged ion (as sodium ion) of molecular sieve is realized with rare earth ion exchanged, the problem of its existence mainly is the restriction that the exchange of rare earth ion is subjected to the zeolite ionic equilibrium, often needs the above rare earth ion exchanged step of secondary just can make catalyzer obtain desirable higher content of rare earth.
Summary of the invention
The preparation method who the purpose of this invention is to provide a kind of rare earth contained hydrocracking catalyst.
The preparation method of rare earth contained hydrocracking catalyst provided by the present invention comprises: the aqueous solution of alumina precursor and/or amorphous aluminum silicide and rare-earth salts is dry then, and make described alumina precursor and/or amorphous aluminum silicide with RE
2O
3Meter contains the rare earth of 1～15 weight %; The alumina precursor and/or the amorphous aluminum silicide that gained are contained rare earth mix with molecular sieve, and add peptizing agent and mix according to a conventional method and pinch or extruded moulding, and drying and roasting, obtain the support of the catalyst of moulding; With the support of the catalyst of gained moulding hydrogenation metal active ingredient according to requirement in the ordinary method load.
Preparation method according to rare earth contained hydrocracking catalyst of the present invention can once make the content of rare earth of catalyzer reach needed level, simultaneously working method is simple, the performance of gained catalyzer with through the catalyzer of molecular sieve rare earth exchanged approach gained quite or better.
Embodiment
The preparation method of rare earth contained hydrocracking catalyst provided by the present invention comprises:
(1) aqueous solution of alumina precursor and/or amorphous aluminum silicide and rare-earth salts is dry then, make described alumina precursor and/or amorphous aluminum silicide with RE
2O
3Meter contains the rare earth of 1～15 weight %;
(2) alumina precursor and/or the amorphous aluminum silicide that (1) gained is contained rare earth mixes with molecular sieve, and adds peptizing agent and mix according to a conventional method and pinch or extruded moulding, and drying and roasting, obtains the support of the catalyst of moulding;
(3) with the hydrogenation metal active ingredient of (2) gained support of the catalyst according to requirement in the ordinary method load.
In the specific embodiment of the present invention, the described alumina precursor of step (1) is meant boehmite, pseudo-boehmite, single diaspore, gibbsite or visits aluminium stone.The SiO of described amorphous aluminum silicide
2/ Al
2O
3Mol ratio is 2-10.
The described rare earth of step in the method provided by the invention (1) is that those of ordinary skills know, comprises, for example, lanthanum, cerium, praseodymium, neodymium, samarium, yttrium etc., or their mixture.Generally in industrial practical application use based on La and/or Ce and contain the lucium of a small amount of other rare earth (as yttrium, neodymium, praseodymium, samarium etc.), wherein the content of La is 5-90 weight %, is preferably 10-50 weight %; The content of Ce is 10-95 weight %, is preferably 50-90 weight %; Other content of rare earth is preferably less than 10 weight % less than 20 weight %.The aqueous solution of described rare-earth salts can be the aqueous solution of muriate, nitrate, oxalate etc., and its concentration has no particular limits, but preferred concentration range is that 50～200 grams per liters are (with RE
2O
3Meter).
The condition of the employed raw material of moulding, each proportion of raw materials, moulding and the shape of carrier etc. described in the step in the method provided by the invention (2) decide according to state of the art and actual industrial needs fully, and the present invention has no particular limits it.For example, described molecular sieve is generally Y zeolite, also can be the mixture of Y zeolite and β zeolite, mordenite, MCM-41 etc.; Described Y zeolite can be the Y zeolite that has exchanged processing and/or super stabilizing processing through preliminary ammonium, and its lattice constant scope can be the 2.420-2.460 nanometer, and its sodium oxide content preferably is lower than 0.2 weight %, more preferably less than 0.1 weight %.Described peptizing agent can be mineral acid such as nitric acid, hydrochloric acid, also can be organic acid such as formic acid, acetate, citric acid, oxalic acid, propanedioic acid, tartrate etc.Described forming method can be compressed moulding, extrusion moulding, rotational forming, spray shaping etc.The cross-sectional shape of preformed catalyst can be round, tetragon, trilateral, cloverleaf pattern, Herba Galii Bungei shape etc.; It also can be the distortion of these shapes.When shaping of catalyst, can also add extrusion aid such as sesbania powder.In a kind of preferred embodiment of the present invention, the forming method of support of the catalyst can be: with molecular sieve and amorphous aluminum silicide and/or alumina precursor according to molecular sieve: amorphous aluminum silicide and/or alumina precursor=1: mixed (0.6-5) is even, add an amount of peptizing agent, mix the back molding machine, at roasting temperature 2-3 hour of 300-650 ℃, obtain the support of the catalyst of moulding after the oven dry.
According to raw materials used sodium content level as molecular sieve, amorphous aluminum silicide, alumina precursor etc., if the sodium content of the support of the catalyst after the moulding of step (2) is higher, can carry out the ammonium exchange afterwards again so that the sodium oxide content of support of the catalyst is reduced to below the 0.2 weight % in step (2), below the preferred 0.1 weight %.
Step in the method provided by the invention (3) is described will to need heavy hydrogenation metal active ingredient to carry out according to the method for prior art in the load of gained support of the catalyst, described hydrogenation metal active ingredient can be selected from one or more among Ni, Co, Mo, the W, its charge capacity is selected according to the actual industrial needs, and the present invention has no particular limits it.The load of reactive metal can be adopted saturated pickling process, also can adopt the supersaturation pickling process.All reactive metals on can single-steeping also can flood several times.When employing is repeatedly flooded, flood between two kinds of metal steps and can carry out roasting, also can not carry out roasting.But generally need be after all reactive metal dippings are finished with the roasting according to a conventional method of gained catalyzer.The charge capacity of described reactive metal has no particular limits, and is generally the 10-35 weight % of total catalyst weight.
The following examples will the present invention is described further, but can not be interpreted as it is limitation of the present invention.
Embodiment 1
The preparation of rare earth mixed solution: get RECl
3(weight percentage of each composition is in its total amount of rare earth: Ce
2O
363%, La
2O
325%, Pr
6O
112.1%, Nd
2O
35.0%, Sm
2O
30.5%, other 4.4%, down with) 5.1g, add water to 16ml, be prepared into RE
2O
3Content is the mixed rare earth solution of 70g/l.
Get SB aluminum oxide powder (German business men product, trade names are SB) 20g (dry basis), join in the above-mentioned mixed rare earth solution of 16ml, mix, flooded 3 hours, dried 2 hours down at 120 ℃, 350 ℃ of following roastings 3 hours in retort furnace then, obtain containing the aluminum oxide of rare earth, (the Lanzhou Oil Refinery catalyst plant is produced, SiO with itself and amorphous aluminum silicide then
2/ Al
2O
3Mol ratio is 4.5, down together) (the Lanzhou Oil Refinery catalyst plant is produced for 60g (dry basis) and molecular sieve, lattice constant is 2.439 nanometers, degree of crystallinity is 78.9%, down together) 20g (dry basis) mixes, adding concentration gradually and be 3% nitric acid sol solution and extruded moulding, to obtain diameter be 2.2 millimeters cylindrical bar, and the support of the catalyst of this moulding in 120 ℃ of oven dry 3 hours down, was obtained support of the catalyst in 2 hours 600 ℃ of following roastings again.Getting nickelous nitrate 34g adds to 30ml and contains WO
3In the ammonium metatungstate solution of 120g/ml, add water to 80ml, stir, become the metal mixed steeping fluid, the support of the catalyst of gained moulding is placed this steeping fluid, flooded 2 hours, the oven dry back obtains hydrocracking catalyst of the present invention in 400 ℃ of following roastings 4 hours, is designated as A.
Embodiment 2
The preparation of rare earth mixed solution: get RECl
33.5g, add water to 65ml, be prepared into RE
2O
3Content is the mixed rare earth solution of 40g/l.
Get SD aluminum oxide powder (Shandong Aluminum Plant produces, and trade names are SD) 80g (dry basis), add in the above-mentioned mixed rare earth solution of 65ml, mix, flooded 3 hours, dried 2 hours down at 120 ℃, 250 ℃ of following roastings 3 hours in retort furnace then obtain containing the aluminum oxide of rare earth; Then it is mixed with molecular sieve 20g (dry basis), adding concentration and be 3% nitric acid sol solution and extruded moulding, to obtain diameter be 2.2 millimeters cylindrical bar, the support of the catalyst of this moulding was dried 3 hours down in 120 ℃, obtained support of the catalyst in 2 hours 550 ℃ of following roastings again.According to hydrogenation metal active ingredient in the same procedure load of embodiment 1, the oven dry back obtains the hydrocracking catalyst of wood invention in 450 ℃ of following roastings 2 hours, is designated as B.
Embodiment 3
The preparation of rare earth mixed solution: get RECl
310.5g, add water to 70ml, be prepared into RE
2O
3Content is the mixed rare earth solution of 102g/l.
(China Petrochemical Corp.'s Chang Ling refinery catalyst plant produces to get the CL aluminum oxide powder, trade names are SB) 80g (dry basis), join in the above-mentioned mixed rare earth solution, mix, flooded 3 hours, dried 2 hours down at 120 ℃, 400 ℃ of following roastings 3 hours in retort furnace then, obtain containing the aluminum oxide of rare earth, then it is mixed with molecular sieve 20g (dry basis), adding concentration gradually and be 3% nitric acid sol solution and extruded moulding, to obtain diameter be 2.2 millimeters cylindrical bar, and the support of the catalyst of this moulding in 120 ℃ of oven dry 3 hours down, was obtained support of the catalyst in 2 hours 500 ℃ of following roastings again.Getting nickelous nitrate 17g adds to 30ml and contains WO
3In the ammonium metatungstate solution of 120g/ml, add water to 80ml, stir, become the metal mixed steeping fluid, support of the catalyst is placed this steeping fluid, flooded 2 hours, the oven dry back obtains hydrocracking catalyst of the present invention in 500 ℃ of following roastings 1 hour, is designated as C.
Embodiment 4
The preparation of rare earth mixed solution: get RECl
35.90g, add water 50ml, be prepared into RE
2O
3Content is the mixed rare earth solution of 81g/l.
Get amorphous aluminum silicide 60g (butt), get mixed rare earth solution 50ml, add in the amorphous aluminum silicide, stir, mix, flooded 1 hour, 120 ℃ of oven dry pulverizing in 2 hours down, oven dry was placed in 400 ℃ of retort furnaces roasting 1 hour, obtain the rare earth amorphous aluminum silicide, then itself and SB powder 20g (butt) and molecular sieve 20g (butt) are mixed, add 3% salpeter solution gradually, it is 2.2 millimeters cylindrical bar that extruded moulding obtains diameter, in 120 ℃ of oven dry 3 hours down, 550 ℃ of following roastings 2 hours.According to hydrogenation metal active ingredient in the same procedure load of embodiment 1, the oven dry back obtains hydrocracking catalyst in 450 ℃ of following roastings 2 hours, is designated as D then
Embodiment 5
The preparation of rare earth mixed solution: get RECl
310.8g, add water 100ml, be prepared into RE
2O
3Content is about the mixed rare earth solution of 71g/l.
To contain 5%SiO
2Sodium silicate solution 1850ml be heated to 80 ℃, under fierce the stirring, add 5N hydrochloric acid to PH＜3, standby, be designated as I liquid; The ammoniacal liquor of adding 10% in 170ml 10% aluminum nitrate solution under fierce the stirring is designated as II liquid to PH＞4.5 in the time of 80 ℃, and I liquid and II liquid are mixed, and stirs, and places 12 hours, and washing is to there not being Cl
-Dried 4 hours for 120 ℃, get filter cake (butt 100g) and in the above-mentioned mishmetal liquid of 14ml, flooded 10 hours, dried 3 hours down for 60 ℃, dried 2 hours down for 120 ℃, 500 ℃ of following roastings obtained the rare earth amorphous aluminum silicide in 4 hours in retort furnace, itself and SB powder 20g (butt) and molecular sieve 20g (butt) are mixed, add 3% nitric acid gradually, it is 2.2 millimeters cylindrical bar that extruded moulding obtains diameter, dried 3 hours down in 120 ℃, 600 ℃ of following roastings 2 hours.According to hydrogenation metal active ingredient in the same procedure load of embodiment 1, the oven dry back obtained hydrocracking catalyst in 2 hours in 450 ℃ of following roastings, was designated as E then.
Embodiment 6
Rare earth liquid preparation: get La (NO
3) .6H
2O (is produced from the Beijing Chemical Plant, analytical pure), 8.3g adds water 80ml, La
2O
3Content is 38.9g/l.
Get siliceous aluminum oxide Siral 40 (silica content 41.0 weight %, alumina content 58.9% weight, Germany Condea company product) 60g (butt) adds in the above-mentioned earth solution of 80ml, mix, flooded 3 hours, in 120 ℃ of oven dry 2 hours down, 300 roastings 2 hours, after the pulverizing, add SB powder 20g (butt) again and molecular sieve 20g (butt) mixes, add 3% salpeter solution gradually, it is 2.2 millimeters cylindrical bar that extruded moulding obtains diameter, in 120 ℃ of oven dry 3 hours down, 500 ℃ of following roastings 2 hours.According to hydrogenation metal active ingredient in the same procedure load of embodiment 1, the oven dry back obtained hydrocracking catalyst in 2 hours in 450 ℃ of following roastings, was designated as F then.
Embodiment 7
Rare earth liquid preparation: get (NH
4)
2Ce (NO
3)
6(is produced from the Beijing Chemical Plant, analytical pure), 7.4g adds water 80ml, Ce
2O
3Content is about 27.7g/l.Get siliceous aluminum oxide Siral 40 (silica content 41.0%, aluminum oxide 58.9%, Germany Condea company product) 60g (butt) adds in the above-mentioned earth solution of 80ml, mix, flooded 3 hours, dried 2 hours down at 120 ℃, then in 400 ℃ of following roastings 1 hour, pulverize, add SB powder 20g (butt) again and molecular sieve 20g (butt) mixes, add 3% salpeter solution, it is 2.2 millimeters cylindrical bar that extruded moulding obtains diameter, dried 5 hours down in 120 ℃, 550 ℃ of following roastings 2 hours.According to hydrogenation metal active ingredient in the same procedure load of embodiment 3, the oven dry back obtained hydrocracking catalyst in 3 hours in 450 ℃ of following roastings, was designated as G then.
Comparative Examples 1
Get molecular sieve 50g (butt), join RE
2O
3Content is in the mixed rare earth solution 500ml of 20g/l, stirs 2 hours down in 90 ℃, filters, and uses washed with de-ionized water; So repeated treatments is 3 times; 450 ℃ of following roastings 2 hours, obtain the REY molecular sieve, wherein RE again
2O
3Content is 5.5%.
Getting amorphous aluminum silicide 60g (butt), SB powder 20g (butt) and above-mentioned REY molecular sieve 21.2g (butt) mixes, add 3% aqueous nitric acid gradually, it is 2.2 millimeters cylindrical bar that extruded moulding obtains diameter, in 120 ℃ of oven dry 3 hours down, 600 ℃ of following roastings 2 hours.According to hydrogenation metal active ingredient in the same procedure load of embodiment 1, the oven dry back obtained hydrocracking catalyst in 2 hours in 450 ℃ of following roastings, was designated as H.
Comparative Examples 2
According to U.S. Pat 4,309, the embodiment 1 described method in 277 prepares hydrocracking catalyst as a comparison.
The preparation of rare earth mixed solution: get RECl
310.2g, add water to the 80ml dissolving and mix standby.
SB powder 50g (butt), molecular sieve 50g (butt) are mixed, add 3% aqueous nitric acid gradually, it is 2.2 millimeters cylindrical bar that extruded moulding obtains diameter, in 100 ℃ of oven dry 2 hours down, 593 ℃ of following roastings 1 hour; Place 1900ml to contain 5g NH in the carrier of gained moulding
4NO
3And in the aqueous solution of 2.5ml strong aqua, 95 ℃ are stirred ammonium exchange 16 hours, deionized water rinsing down; With gained carrier impregnation in 95 ℃ above-mentioned mixed solution of rare earth 1 hour, deionized water was washed till no Cl
-, 100 ℃ of down oven dry 1 hour, 500 ℃ of following roastings 1 hour, according to the method described above after the rare earth exchanged, 500 ℃ of roastings were taken out after 1 hour again.According to hydrogenation metal active ingredient in the same procedure load of embodiment 1, the oven dry back obtains hydrocracking catalyst in 450 ℃ of following roastings 2 hours, is designated as I then.
Embodiment 8
The hydrocracking reaction performance of present embodiment explanation catalyzer.
The evaluating catalyst condition:
The evaluating catalyst condition:
Catalyst levels, 0.15g (60-80 order), with the dilution of 0.3g quartz sand, beds is up and down all with quartz sand filling, tube inner diameter 8mm, long 320mm, constant temperature head of district 20mm (catalyzer practical application 10mm).
Reaction conditions: adopt 6%CS earlier
2/ normal hexane was in 300 ℃ of prevulcanizeds 2 hours.Being warming up to 360 ℃, is the model compound evaluate catalysts with n-decane (nC10), nC10 flow velocity 0.1ml/min, H
2Flow velocity 400ml/min represents catalyst activity with the n-decane transformation efficiency, represents the isomery performance of catalyzer with isomerized products yield under the same conversion, and product is through the gas-chromatography on-line analysis.Chromatographic condition: stationary liquid OV-101, carrier are silanization 201 red supporters, and stationary liquid is coated with stain amount 15%, stainless steel chromatogram post, internal diameter 2mm, external diameter 3mm, length 3.8m.Fid detector, N
2Flow velocity 30ml/min, 210 ℃ of vaporization temperatures, 210 ℃ of detector temperatures, quantity tube sampling, on-line analysis.Analysis condition: 40 ℃ of constant temperature 2min, 20 ℃/min temperature programming to 160 ℃, constant temperature 6min.
The evaluation result of each catalyzer is as shown in table 1:
The performance of table 1, different preparation method's gained hydrocracking catalysts
| Catalyzer | 360 ℃ of following transformation efficiencys | The amount of the isomerized products under 60% transformation efficiency | Carrier content of rare earth RE 2O 3％ |
| A | 72.2 | 2.68 | 3.4 |
| B | 71.0 | 2.73 | 2.3 |
| C | 71.5 | 2.60 | 7.0 |
| D | 65.6 | 2.90 | 4.0 |
| E | 71.7 | 2.6 | 1.0 |
| F | 70.8 | 2.81 | 3.1 |
| G | 73.8 | 2.69 | 2.2 |
| H | 68 | 2.53 | 1.1 |
| I | 69.8 | 2.75 | 6.5 |
Claims (8)
1, a kind of preparation method who contains the hydrocracking catalyst of rare earth is characterized in that this method comprises:
(1) aqueous solution of alumina precursor and/or amorphous aluminum silicide and rare-earth salts is dry then, make described alumina precursor and/or amorphous aluminum silicide with RE
2O
3Meter contains the rare earth of 1～15 weight %;
(2) (1) gained is contained the alumina precursor of rare earth and/or amorphous aluminum silicide and molecular sieve according to molecular sieve: amorphous aluminum silicide and/or alumina precursor=1: part by weight (0.6-5) mixes, and add peptizing agent and mix and pinch or extruded moulding, and drying and roasting, obtain the support of the catalyst of moulding;
(3) with (2) gained support of the catalyst according to the hydrogenation metal active ingredient that accounts for total catalyst weight 10-35 weight % in the ordinary method load.
2, according to the process of claim 1 wherein that the described alumina precursor of step (1) is boehmite, pseudo-boehmite, single diaspore, gibbsite or visits aluminium stone; The SiO of described amorphous aluminum silicide
2/ Al
2O
3Mol ratio is 2-10.
3, according to the process of claim 1 wherein that the described rare earth of step (1) is the lucium based on La and/or Ce; The aqueous solution of described rare-earth salts is the aqueous solution of muriate, nitrate or oxalate.
4, according to the process of claim 1 wherein that the described molecular sieve of step (2) is a Y zeolite, or the mixture of Y zeolite and β zeolite, mordenite or MCM-41.
5, according to the method for claim 1 or 4, wherein said molecular sieve is that lattice constant is the Y zeolite of 2.420-2.460 nanometer.
6, according to the process of claim 1 wherein that described peptizing agent is selected from nitric acid, hydrochloric acid, citric acid or oxalic acid.
7, according to the method for claim 1, this method also is included in step (2) and carries out the ammonium exchange afterwards again so that the sodium oxide content of support of the catalyst is reduced to below the 0.2 weight %.
8, according to the process of claim 1 wherein that the described hydrogenation metal active ingredient of step (3) is selected from one or more among Ni, Co, Mo, the W.
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20041006 |