CN104258870A - Catalyst for hydrocracking polycyclic aromatic hydrocarbon compound as well as preparation method and application of catalyst - Google Patents
Catalyst for hydrocracking polycyclic aromatic hydrocarbon compound as well as preparation method and application of catalyst Download PDFInfo
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Abstract
A catalyst for hydrocracking polycyclic aromatic hydrocarbon compound is characterized by comprising components in percentage by weight as follows: 19%-25% of tungsten trioxide, 4%-7% of nickel oxide and the balance of carriers. The prepared catalyst has the advantages of high activity, good hydrogenation performance and high mechanical strength.
Description
Technical field
The invention belongs to a kind of Catalysts and its preparation method and application of hydrocracking polycyclic aromatic hydrocarbon compounds.
Background technology
Petroleum-based energy accounts for 30% of global energy, causes high-grade crude oil consumption totally to the growth of oil product consumption.For solving this difficult problem, petroleum industry is making great efforts to seek a kind of effective mode by low-grade fossil energy (coal tar, normal, decompression residuum, heavy oil, bitumen, sand oil) transform vapour, diesel oil (Fule, 2014,137,237-244).
Low-grade fossil energy (coal tar, normal, decompression residuum, heavy oil, bitumen, sand oil) density is high, and polycyclic aromatic hydrocarbon content is high.National environmental protection policy is more and more stricter, also more and more higher to the requirement of fuel clean-up performance, the fuel oil that low-grade fossil energy Hydrogenation obtains is general, and all polycyclic aromatic hydrocarbon content is high, Cetane number is low, can not reach the national standard of derv fuel, wherein national standard polycyclic aromatic hydrocarbon≤11wt%; National standard Cetane number >=45, and coal tar diesel oil distillate Cetane number is lower than 35.Hydrocracking becomes low-grade fossil energy makes it one of key technology transforming the clean fuel such as vapour, diesel oil.In low-grade fossil energy, polycyclic aromatic hydrocarbon content is more, and hydrocracking is more difficult, and cracking and hydrogenation cracking reaction need be carried out under catalyst action, and the research meeting hydrocracking requirement catalyst becomes most important.
CN 201210442999.6 gives aluminium oxide and Y molecular sieve mixing composition carrier, but supported active metals component is more, makes its Kaolinite Preparation of Catalyst specific area less; And Ni/W is not in best cracking ratio, book (hydrocracking process and engineering, Han Chongren, 154-159) mentions optimal proportion at Ni/W-USY-Al
2o
3catalyst n i/W is best about 0.4; Do not add expanding agent causing hole small volume; These factors cause hydrocracking catalyst effect undesirable.US 5,565,088 describes a kind of containing ZSM molecular sieve hydrocracking catalyst.ZSM molecular sieve cracking effect is not as USY molecular sieve, and ZSM molecular sieve is generally used for doing diesel oil pour point depression modified catalyst.CN 200910112036.8 gives phosphotungstic acid, cesium salt and nickel salt and prepares hydrocracking catalyst, and thus specific area is lower on carrier not have load.
Summary of the invention
The invention provides a kind of active high, Hydrogenation is good, the Catalysts and its preparation method of the hydrocracking polycyclic aromatic hydrocarbon compounds that mechanical strength is high and application.
In order to solve the problems of the technologies described above, hydrocracking catalyst of the present invention is made up of tungstic acid, nickel monoxide and carrier, it is characterized in that: tungstic acid content is 19-25wt%, and nickel monoxide content is 4-7wt%, and all the other are carrier.
Described carrier is made up of USY molecular sieve, HZSM-5, amorphous aluminum silicide, aluminium oxide and titanium dioxide, and its weight part ratio USY molecular sieve: HZSM-5: amorphous aluminum silicide: aluminium oxide: titanium dioxide=5-6:3-4:3-4:6-7:1.
USY molecular sieve Si/Al mol ratio (n/n)=10-42 as above.
HZSM-5Si/Al mol ratio (n/n)=25-8 as above.
Amorphous aluminum silicide Si/Al mol ratio (n/n)=0.3-0.6 as above.
The preparation method of hydrocracking catalyst of the present invention, comprises the following steps:
(1) carrier is prepared
USY molecular sieve, HZSM-5 molecular sieve, amorphous silicon aluminium, aluminum oxide precursor thing, expanding agent and extrusion aid are mixed in kneader, form mixture, again by deionized water: mixture weight, than being 0.5-0.7:1, adds deionized water, afterwards after kneading 90-120min in mixture, put into banded extruder extrusion molding, then dry 18-24h in room temperature, after 110 DEG C of dry 8-10h, be warming up to 550-650 DEG C with 1-4 DEG C/min heating rate, roasting 6-8h, obtains carrier.
Aluminum oxide precursor thing as above comprises boehmite and boehmite binding agent, boehmite: intend thin water al binder weight ratio (m/m)=0.5-1.3:1
Boehmite described above is specific area is 350-450m
2/ g, pore volume is 0.6-1.0cm
3the boehmite of/g.The thin water al binder of described plan is pore volume 0.2-0.4cm
3the boehmite of/g.
Expanding agent as above is polyacrylamide, the molecular weight 300-2100 ten thousand of polyacrylamide, and described expanding agent content is the 14-16wt% of aluminum oxide precursor thing.
Described extrusion aid is made up of sesbania gum and organic acid, its weight part ratio sesbania gum: organic acid=1:1-3, and described organic acid is the one in lactic acid, malonic acid, citric acid or tartaric acid, and described extrusion aid content is the 4-7wt% of mixture.
(2) dipping solution is prepared
By tungstic acid predecessor phosphotungstic acid H
3pO
4w
12o
36xH
2o joins in deionized water, then by nickel monoxide predecessor nickel acetate tetrahydrate Ni (CH
3cOO)
24H
2o joins in phosphotungstic acid aqueous solution, makes it dissolve completely, obtain dipping solution in stirring at room temperature.
(3) Kaolinite Preparation of Catalyst
Adopt equi-volume impregnating, by dipping solution impregnated carrier, dipping 1-2h, then in drying at room temperature 10-15h, 6 DEG C of dry 2-3h, 110 DEG C of dry 8-9h, be then warming up to 450-520 DEG C with 1-3 DEG C/min heating rate, roasting 4-6h, i.e. obtained catalyst.
Hydrocracking catalyst application of the present invention comprises the steps:
Catalyst adopts fixed bed reactors, is that the catalyst between 10-20 order adds in fixed bed reactors by catalyst particle size, and first to presulfiding of catalyst, the sulfuration liquid of presulfurization is the kerosene containing carbon disulfide 2.5-3.0wt%, and conditions of vulcanization is: H
2pressure 1.9-2.1MPa, volume space velocity 0.4-0.6h during liquid
-1, hydrogen/liquid volume ratio is 600/1-900/1, temperature 360-370 DEG C, cure time 25-30h; Then controlling reaction condition is H
2pressure 7.8-8.5Mpa, material liquid is the cyclohexane solution of naphthalene, and the content of naphthalene is the 8-13wt% of solution quality, volume space velocity 1.5-2.5h during liquid
-1, hydrogen/material liquid volume ratio is 1400/1-1600/1, and temperature is 329-331 DEG C and reacts.
The beneficial effect that the present invention compared with prior art has is: catalyst of the present invention has stronger hydrocracking polycyclic aromatic hydrocarbon performance, can adapt to this feature of low-grade fossil energy hydrocracking process preferably.
HZSM-5 is added to increase the acid content of carrier in common carrier aluminium oxide and USY molecular sieve in hydrocracking catalyst of the present invention, increase cracking performance, make polycyclic aromatic hydrocarbon cracking be mononuclear aromatics, reduce polycyclic aromatic hydrocarbon content, make catalyst have isomerization performance simultaneously, reduce the gold-plating journey of product.Add amorphous aluminum silicide, increase the hydrotreated lube base oil performance of aromatic hydrocarbons, make polycyclic aromatic hydrocarbon be transformed into cycloalkane, reduce polycyclic aromatic hydrocarbon content.Titanium oxide can improve active component state of cure (vulcanization) and mechanical strength, improves active component with carrier in conjunction with energy.Add expanding agent polyacrylamide, increase pore volume and average pore size.
Active component take phosphotungstic acid as tungstic acid forerunner ratio tradition is tungstic acid predecessor with ammonium metatungstate, increase catalyst acid content, improve catalyst hydrogenation cracking performance, phosphotungstic acid and nickel acetate are presoma, before dipping, reaction generates phosphotungstic acid nickel, and it is hydrogenation cracking activity the highest (J.Phys.Chem., B2002 in tungsten sulfide, nickel sulfide, sulfo-phosphotungstic acid nickel that the sulfuration of phosphotungstic acid nickel generates sulfo-phosphotungstic acid nickel, 106,5897-5906).Thus make catalyst have the performance of good hydrocracking, improve the performance of hydrocracking polycyclic aromatic hydrocarbon compounds.
Detailed description of the invention
Embodiment 1
Take the USY molecular sieve 150g of Si/Al (n/n)=10, the HZSM-5 molecular sieve 100g of Si/Al (n/n)=80, Si/Al (n/n)=0.3 amorphous aluminum silicide 75g, specific area 350m
2/ g, pore volume is 1.0cm
3the boehmite 63g of/g, pore volume is 0.4cm
3/ g intends thin water al binder 125g, molecular weight is the polyacrylamide 26g of 300-1200 ten thousand, butyl titanate 107g, sesbania gum 6.5g and lactic acid 19.5g, and mix, then in said mixture, add deionized water 378g, after kneading 90min presents starchiness in kneader, put into banded extruder extrusion molding.Then at drying at room temperature 20h, after 110 DEG C of dry 8h, be warming up to 550 DEG C with 1 DEG C/min heating rate, roasting 8h, obtain carrier finished product 402g, calculate with butt, USY molecular sieve accounts for total weight of carrier 30%, HZSM-5 molecular sieve and accounts for total weight of carrier 20%, and amorphous aluminum silicide accounts for total weight of carrier 15%, aluminium oxide accounts for total weight of carrier 30%, and titanium dioxide accounts for total weight of carrier 5%.
Adopt equi-volume impregnating, take tungstic acid predecessor phosphotungstic acid H
3pO
4w
12o
36xH
2o 26.8g adds in 78g deionized water, then takes nickel monoxide predecessor nickel acetate tetrahydrate Ni (CH
3cOO)
24H
2o17.7g, adds in Salkowski's solution, then stirring at room temperature 2h, it is made to dissolve completely, obtain dipping solution 122.4g, then flood described carrier 100g with described dipping solution, dipping 1h, again in drying at room temperature 10h, 60 DEG C of dry 2h, 110 DEG C of dry 8h, be then warming up to 450 DEG C with 1 DEG C/min heating rate, roasting 6h, i.e. obtained finished catalyst 129.2g.Be labeled as catalyst A, its composition and character are in table 1.
The A application of hydrocracking catalyst: first to catalyst A presulfurization, the sulfuration liquid of presulfurization is the kerosene containing carbon disulfide 3.0wt%, and conditions of vulcanization is: H
2pressure 1.9MPa, volume space velocity 0.4h during liquid
-1, hydrogen/oil volume ratio is 800/1, temperature 360 DEG C, cure time 30h; Then be the cyclohexane solution of 13wt% with naphthalene content be raw material; Continuous fixed-bed reactor reacts, and the hydrocracking experiment reaction tube of catalyst is stainless steel tube, and control reaction condition is H
2pressure 8.5Mpa, volume space velocity 1.5h during liquid
-1, hydrogen/oil volume ratio is 1400/1, and temperature is 331 DEG C and reacts.Under these conditions, investigate catalyst A to the hydrocracking performance of naphthalene, the each 12h of product receives a sample, is divided three classes by product by quality, the naphthane of unreacted naphthalene, non-complete hydrogenation and other (1,2-diethylbenzene, 1,2-dimethylbenzene, benzene, decahydronaphthalene etc.), its interpretation of result is as table 2.
Embodiment 2
Take the USY molecular sieve 150g of Si/Al (n/n)=15, the HZSM-5 molecular sieve 75g of Si/Al (n/n)=50, Si/Al (n/n)=0.5 amorphous aluminum silicide 100g, specific area 378m
2/ g, pore volume is 0.8cm
3the boehmite 94g of/g, pore volume is 0.4cm
3/ g intends thin water al binder 94g, molecular weight is the polyacrylamide 28g of 600-1600 ten thousand, butyl titanate 107g, sesbania gum 16g and citric acid 16g, and mix, then in said mixture, deionized water 342g is added, starchiness is presented after kneading 100min in kneader, put into banded extruder extrusion molding, then 20h is dried in room temperature, after 110 DEG C of dry 9h, 580 DEG C are warming up to 2 DEG C/min heating rate, roasting 7h, obtain carrier finished product 410g, calculate with butt, USY molecular sieve accounts for total weight of carrier 30%, HZSM-5 molecular sieve accounts for total weight of carrier 15%, amorphous aluminum silicide accounts for total weight of carrier 20%, , aluminium oxide accounts for total weight of carrier 30%, titanium dioxide accounts for total weight of carrier 5%.
Adopt equi-volume impregnating, take tungstic acid predecessor phosphotungstic acid H
3pO
4w
12o
36xH
2o 30.8g adds in 79g deionized water, then takes nickel monoxide predecessor nickel acetate tetrahydrate Ni (CH
3cOO)
24H
2o23.0g, adds in Salkowski's solution, then stirring at room temperature 2h, it is made to dissolve completely, obtain dipping solution 132.7g, then flood described carrier 100g with described dipping solution, dipping 1.5h, again in drying at room temperature 12h, 60 DEG C of dry 2h, 110 DEG C of dry 8.5h, be then warming up to 480 DEG C with 2 DEG C/min heating rate, roasting 5h, i.e. obtained finished catalyst 135.0g.Be labeled as catalyst B, its composition and character are in table 1.
The application of hydrocracking catalyst B: first to catalyst B presulfurization, the sulfuration liquid of presulfurization is the kerosene containing carbon disulfide 2.8wt%, and conditions of vulcanization is: H
2pressure 2.0MPa, volume space velocity 0.5h during liquid
-1, hydrogen/oil volume ratio is 1000/1, temperature 365 DEG C, cure time 28h; Then be the cyclohexane solution of 11wt% with naphthalene content be raw material; Continuous fixed-bed reactor reacts, and the hydrocracking experiment reaction tube of catalyst is stainless steel tube.Control reaction condition is H
2pressure 8.2Mpa, volume space velocity 2.0h during liquid
-1, hydrogen/oil volume ratio is 1500/1, and temperature is 330 DEG C and reacts.Under these conditions, investigate catalyst B to the hydrocracking performance of naphthalene, the each 12h of product receives a sample, is divided three classes by product by quality, the naphthane of unreacted naphthalene, non-complete hydrogenation and other (1,2-diethylbenzene, 1,2-dimethylbenzene, benzene, decahydronaphthalene etc.), its interpretation of result is as table 2.
Embodiment 3
Take the USY molecular sieve 125g of Si/Al (n/n)=31, the HZSM-5 molecular sieve 75g of Si/Al (n/n)=38, Si/Al (n/n)=0.5 amorphous aluminum silicide 100g, specific area 425m
2/ g, pore volume is 0.7cm
3the boehmite 125g of/g, pore volume is 0.3cm
3/ g intends thin water al binder 94g, molecular weight is the polyacrylamide 33g of 1600-2100 ten thousand, butyl titanate 107g, sesbania gum 15g and tartaric acid 30g, and mix, then in said mixture, deionized water 422g is added, after in kneader, kneading 120min presents starchiness, put into banded extruder extrusion molding, then 18h is dried in room temperature, after 110 DEG C of dry 9h, 620 DEG C are warming up to 3 DEG C/min heating rate, roasting 7h, obtain carrier 403g, calculate with butt, USY molecular sieve accounts for total weight of carrier 25%, HZSM-5 molecular sieve accounts for total weight of carrier 15%, amorphous aluminum silicide accounts for total weight of carrier 20%, aluminium oxide accounts for total weight of carrier 35%, titanium dioxide accounts for total weight of carrier 5%.
Adopt equi-volume impregnating, take tungstic acid predecessor phosphotungstic acid H
3pO
4w
12o
36xH
2o 35.2g adds in 78g deionized water, then takes nickel monoxide predecessor nickel acetate tetrahydrate Ni (CH
3cOO)
24H
2o28.7g, adds in Salkowski's solution, then stirring at room temperature 2h, it is made to dissolve completely, obtain dipping solution 141.9g, then flood described carrier 100g with described dipping solution, dipping 1.5h, again in drying at room temperature 12h, 60 DEG C of dry 2.5h, 110 DEG C of dry 8.5h, be then warming up to 500 DEG C with 2 DEG C/min heating rate, roasting 5h, i.e. obtained finished catalyst 140.8g.Be labeled as catalyst C, its composition and character are in table 1.
The application of hydrocracking catalyst C: first to catalyst C presulfurization, the sulfuration liquid of presulfurization is the kerosene containing carbon disulfide 2.8wt%, and conditions of vulcanization is: H
2pressure 2.0MPa, volume space velocity 0.5h during liquid
-1, hydrogen/oil volume ratio is 800/1, temperature 365 DEG C, cure time 28h; Then be the cyclohexane solution of 10wt% with naphthalene content be raw material; Continuous fixed-bed reactor reacts, and the hydrocracking experiment reaction tube of catalyst is stainless steel tube.Control reaction condition is H
2pressure 8.0Mpa, volume space velocity 2.0h during liquid
-1, hydrogen/oil volume ratio is 1500/1, and temperature is 330 DEG C and reacts.Under these conditions, investigate catalyst C to the hydrocracking performance of naphthalene, the each 12h of product receives a sample, is divided three classes by product by quality, the naphthane of unreacted naphthalene, non-complete hydrogenation and other (1,2-diethylbenzene, 1,2-dimethylbenzene, benzene, decahydronaphthalene etc.), its interpretation of result is as table 2.
Embodiment 4
Take the USY molecular sieve 125g of Si/Al (n/n)=42, the HZSM-5 molecular sieve 100g of Si/Al (n/n)=25, Si/Al (n/n)=0.6 amorphous aluminum silicide 75g, specific area 450m
2/ g, pore volume is 0.6cm
3the boehmite 125g of/g, pore volume is 0.2cm
3/ g intends thin water al binder 94g, and molecular weight is the polyacrylamide 35g of 500-2100 ten thousand, butyl titanate 107g, sesbania gum 15g and malonic acid 30g, and mix, then in said mixture, add deionized water 478g, in kneader after kneading 120min, put into banded extruder extrusion molding, then dry 24h in room temperature, after 110 DEG C of dry 10h, be warming up to 650 DEG C with 4 DEG C/min heating rate, roasting 6h, obtains carrier 401g.Calculate with butt, USY molecular sieve accounts for total weight of carrier 25%, HZSM-5 molecular sieve and accounts for total weight of carrier 20%, and amorphous aluminum silicide accounts for total weight of carrier 15%, and aluminium oxide accounts for total weight of carrier 35%, and titanium dioxide accounts for total weight of carrier 5%.
Adopt equi-volume impregnating, take tungstic acid predecessor phosphotungstic acid H
3pO
4w
12o
36xH
2o 39.9g adds in 78.5g deionized water, then takes nickel monoxide predecessor nickel acetate tetrahydrate Ni (CH
3cOO)
24H
2o35g, stirring at room temperature 2h, makes it dissolve completely, obtains dipping solution 153.4g, then described carrier 100g is flooded with described dipping solution, dipping 2h, then in drying at room temperature 15h, 60 DEG C of dry 3h, 110 DEG C of dry 9h, then be warming up to 520 DEG C with 3 DEG C/min heating rate, roasting 4h, i.e. obtained finished catalyst 146.5g.Be labeled as catalyst D, its composition and character are in table 1.
The application of hydrocracking catalyst D: first to catalyst D presulfurization, first to catalyst D presulfurization, the sulfuration liquid of presulfurization is the kerosene containing carbon disulfide 2.5wt%, and conditions of vulcanization is: H
2pressure 2.1MPa, volume space velocity 0.6h during liquid
-1, hydrogen/oil volume ratio is 900/1, temperature 370 DEG C, cure time 25h; Then be the cyclohexane solution of 8wt% with naphthalene content be raw material; Continuous fixed-bed reactor reacts, and the hydrocracking experiment reaction tube of catalyst is stainless steel tube.Control reaction condition is H
2pressure 7.8Mpa, volume space velocity 2.5h during liquid
-1, hydrogen/oil volume ratio is 1600/1, and temperature is 329 DEG C and reacts.Under these conditions, investigate catalyst D to the hydrocracking performance of naphthalene, the each 12h of product receives a sample, is divided three classes by product by quality, the naphthane of unreacted naphthalene, non-complete hydrogenation and other (1,2-diethylbenzene, 1,2-dimethylbenzene, benzene, decahydronaphthalene etc.), its interpretation of result is as table 2.
Table 1 catalyst composition and character
The isocrackate analysis of table 2 catalyst
Claims (12)
1. a catalyst for hydrocracking polycyclic aromatic hydrocarbon compounds, is characterized in that catalyst is made up of tungstic acid, nickel monoxide and carrier, it is characterized in that: tungstic acid content is 19-25wt%, and nickel monoxide content is 4-7wt%, and all the other are carrier.
2. the catalyst of a kind of hydrocracking polycyclic aromatic hydrocarbon compounds as claimed in claim 1, it is characterized in that described carrier is made up of USY molecular sieve, HZSM-5, amorphous aluminum silicide, aluminium oxide and titanium dioxide, its weight part ratio USY molecular sieve: HZSM-5: amorphous aluminum silicide: aluminium oxide: titanium dioxide=5-6:3-4:3-4:6-7:1.
3. the catalyst of a kind of hydrocracking polycyclic aromatic hydrocarbon compounds as claimed in claim 2, is characterized in that the Si/Al mol ratio=10-42 of described USY molecular sieve.
4. the catalyst of a kind of hydrocracking polycyclic aromatic hydrocarbon compounds as claimed in claim 2, is characterized in that the Si/Al mol ratio=25-80 of described HZSM-5.
5. the catalyst of a kind of hydrocracking polycyclic aromatic hydrocarbon compounds as claimed in claim 2, is characterized in that the Si/Al mol ratio=0.3-0.6 of described amorphous aluminum silicide.
6. the preparation method of the catalyst of a kind of hydrocracking polycyclic aromatic hydrocarbon compounds as described in any one of claim 1-5, is characterized in that comprising the following steps:
(1) carrier is prepared
USY molecular sieve, HZSM-5 molecular sieve, amorphous silicon aluminium, aluminum oxide precursor thing, expanding agent and extrusion aid are mixed in kneader, form mixture, again by deionized water: mixture weight, than being 0.5-0.7:1, adds deionized water, afterwards after kneading 90-120min in mixture, put into banded extruder extrusion molding, then dry 18-24h in room temperature, after 110 DEG C of dry 8-10h, be warming up to 550-650 DEG C with 1-4 DEG C/min heating rate, roasting 6-8h, obtains carrier;
(2) dipping solution is prepared
By tungstic acid predecessor phosphotungstic acid H
3pO
4w
12o
36xH
2o joins in deionized water, then by nickel monoxide predecessor nickel acetate tetrahydrate Ni (CH
3cOO)
24H
2o joins in phosphotungstic acid aqueous solution, makes it dissolve completely, obtain dipping solution in stirring at room temperature;
(3) Kaolinite Preparation of Catalyst
Adopt equi-volume impregnating, by dipping solution impregnated carrier, dipping 1-2h, then in drying at room temperature 10-15h, 6 DEG C of dry 2-3h, 110 DEG C of dry 8-9h, be then warming up to 450-520 DEG C with 1-3 DEG C/min heating rate, roasting 4-6h, i.e. obtained catalyst.
7. the preparation method of the catalyst of a kind of hydrocracking polycyclic aromatic hydrocarbon compounds as claimed in claim 6, it is characterized in that described aluminum oxide precursor thing comprises boehmite and boehmite binding agent, boehmite: intend thin water al binder weight ratio=0.5-1.3:1.
8. the preparation method of the catalyst of a kind of hydrocracking polycyclic aromatic hydrocarbon compounds as claimed in claim 7, is characterized in that described boehmite be specific area is 350-450m
2/ g, pore volume is 0.6-1.0cm
3the boehmite of/g.
9. the preparation method of the catalyst of a kind of hydrocracking polycyclic aromatic hydrocarbon compounds as claimed in claim 7, is characterized in that the thin water al binder of described plan is pore volume 0.2-0.4cm
3the boehmite of/g.
10. the preparation method of the catalyst of a kind of hydrocracking polycyclic aromatic hydrocarbon compounds as claimed in claim 6, it is characterized in that described expanding agent is polyacrylamide, the molecular weight 300-2100 ten thousand of polyacrylamide, expanding agent content is the 14-16wt% of aluminum oxide precursor thing.
The preparation method of the catalyst of 11. a kind of hydrocracking polycyclic aromatic hydrocarbon compounds as claimed in claim 6, it is characterized in that described extrusion aid is made up of sesbania gum and organic acid, its weight part ratio sesbania gum: organic acid=1:1-3, described organic acid is the one in lactic acid, malonic acid, citric acid or tartaric acid, and described extrusion aid content is the 4-7wt% of mixture.
The application of the catalyst of 12. a kind of hydrocracking polycyclic aromatic hydrocarbon compounds as described in any one of claim 1-5, is characterized in that comprising the steps:
Catalyst adopts fixed bed reactors, is that the catalyst between 10-20 order adds in fixed bed reactors by catalyst particle size, and first to presulfiding of catalyst, the sulfuration liquid of presulfurization is the kerosene containing carbon disulfide 2.5-3.0wt%, and conditions of vulcanization is: H
2pressure 1.9-2.1 MPa, volume space velocity 0.4-0.6h during liquid
-1, hydrogen/liquid volume ratio is 600/1-900/1, temperature 360-370 DEG C, cure time 25-30h; Then controlling reaction condition is H
2pressure 7.8-8.5Mpa, material liquid is the cyclohexane solution of naphthalene, and the content of naphthalene is the 8-13wt% of solution quality, volume space velocity 1.5-2.5h during liquid
-1, hydrogen/material liquid volume ratio is 1400/1-1600/1, and temperature is 329-331 DEG C and reacts.
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| CN109529926A (en) * | 2018-12-06 | 2019-03-29 | 中国科学院山西煤炭化学研究所 | A kind of naphthalene is hydrocracked the catalyst and preparation method and application of light aromatics processed |
| CN110694634A (en) * | 2019-10-18 | 2020-01-17 | 大同煤矿集团有限责任公司 | Preparation method and application of catalyst for preparing mixed alcohol ester from fusel oil |
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