CN104549469B - Reproducible polycyclic aromatic hydrocarbon is converted into catalyst of mononuclear aromatics and preparation method thereof - Google Patents
Reproducible polycyclic aromatic hydrocarbon is converted into catalyst of mononuclear aromatics and preparation method thereof Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
Catalyst of mononuclear aromatics and preparation method thereof is converted into the present invention relates to a kind of reproducible polycyclic aromatic hydrocarbon.Mainly solve polycyclic aromatic hydrocarbon conversion level present in prior art low, mononuclear aromatics yield is low and selectivity is low, the problem of catalyst regenerability is poor.The present invention includes the mixture of 30~65% MOR types zeolites and the molecular sieves of ZSM 12 by weight percentage by using catalyst, 34.5~69.9% be binding agent and 0.1~0.5% technical scheme selected from least one of Pt, Pd or Ir metal selected from least one of gamma-alumina, η aluminum oxide or boehmite, preferably solve above mentioned problem, preferably, the catalyst is converted into the industrial production of mononuclear aromatics the catalyst regenerability available for heavy polycyclic aromatic hydrocarbon.
Description
Technical field
Catalyst of mononuclear aromatics and preparation method thereof is converted into the present invention relates to a kind of reproducible polycyclic aromatic hydrocarbon.
Background technology
Polycyclic aromatic hydrocarbon（Polycyclic Aromatic Hydrocarbons PAHs）, it is to contain two and two in molecule
The hydrocarbon of individual above phenyl ring, including naphthalene, anthracene, phenanthrene, pyrene etc. more than 150 plant compound, are important environment and food pollution
Thing.During oil refining, how to be turned into using the heavy aromatics development of raw materials high value added product containing a large amount of polycyclic aromatic hydrocarbons
The important topic that petrochemical industry worker faces.With the intensification of oil product degree of heaviness, in addition to small part is as solvent naphtha, more
Heavy aromatics raw material is used as fuel oil and used, but with the raising of environmental requirement, heavy aromatics market starts atrophy, in weight virtue
In the case of hydrocarbon yield is increased year by year, seek the new way that heavy aromatics rationally utilizes very urgent.In recent years, by developing weight virtue
Hydrocarbon deep conversion, the light-end products of volume increase high added value turn into the significant development strategy of 21 century oil refining industry.
By development for many years, as by the important technology hydrotreating of heavy aromatic hydrocarbon light, although having original at present
Expect the advantages of applicability is wide, conversion level is big, but there is also reaction temperature and pressure are high, air speed is low, consumption hydrogen is big, catalyst life
The weak point such as short, regenerability is poor, these also become the emphasis that domestic and international research institution breaks through.
US6683020B2 discloses a kind of catalyst of open loop, and the catalyst is by a certain proportion of aluminum oxide, aluminosilicate
Molecules of salt is sieved and metal iridium composition, and open loop activity is higher, with certain anti-coking performance.Open loop temperature scope 150~
400 DEG C, pressure 100~3000 psig, LHSV are 0.1~10h-1.Sulfur content no more than 10ppm, and thing in feed stream
Arene content is no more than 20wt% in addition to cycloalkane in stream.
US2007062848A1 discloses one kind first will carry out selective opening and de- alkane again after polycyclic aromatic hydrocarbon fractional saturation
Base is come the method that obtains light aromatics.This method can meet in feed stream polycyclic aromatic hydrocarbon content in more than 20wt%, saturation rank
Duan Wendu is in 300~500 DEG C, 2~10MPa of pressure；Open loop phase temperature is in 200~600 DEG C, 1~12MPa of pressure.Due to two
Section catalyst is mounted in same reactor, it requires that logistics needs to ensure that certain residence time could obtain preferable conversion
Rate, therefore air speed is relatively low.
CN200580009162 discloses a kind of method that polycyclic aromatic hydrocarbon is catalytically conveted to dimethylbenzene, and what this method was used urges
Agent carrier is selected from modenite, mazzite, β zeolites, the topological zeolite of ZSM-11, ZSM-12, ZSM-22, ZSM-23, MFI, NES
Topological zeolite, EU-1, MAPO-36, MAPSO-31, SAPO-11, SAPO-41 and silica-alumina and combinations thereof.Should
Catalyst can be used for raw material stream of the processing containing high boiling substance, and raw material can also be reduced to a certain degree while dimethylbenzene is generated
The 99.5wt% of stream terminal.
CN1270989A discloses one kind and contains C9 +Heavy arenes lightening catalyst and product separation method, it is described
Catalyst is by 0.05~0.3 weight % group VIII metal, 20~59 weight % zeolite with MOR structures, 20~50 again %
The aluminum oxide composition of the zeolite of MFI structure and 20~40 weight %.Described method be by heavy arene 350~450 DEG C, 0.5~
Contacted under the conditions of 3.5MPa with above-mentioned catalyst, gained lighting product can obtain BTX and mesitylene, inclined front three by fractionation
The Organic Ingredients such as benzene, durol.
The content of the invention
One of technical problems to be solved by the invention are deep in order to overcome polycyclic aromatic hydrocarbon present in prior art to convert
Degree is low, and mononuclear aromatics yield is low and selectivity is low, and the problem of catalyst regenerability is poor new is used for polycyclic aromatic hydrocarbon there is provided a kind of
It is converted into the catalyst of mononuclear aromatics.The catalyst is used for the reaction that polycyclic aromatic hydrocarbon is converted into mononuclear aromatics, with polycyclic aromatic hydrocarbon
Conversion level is high, and the yield and selectivity of mononuclear aromatics are high, the good advantage of catalyst regenerability.
The two of the technical problems to be solved by the invention be to provide it is a kind of it is corresponding with solving one of technical problem can be again
Raw polycyclic aromatic hydrocarbon is converted into the preparation method of the catalyst of mononuclear aromatics.
The three of the technical problems to be solved by the invention be to provide it is a kind of it is corresponding with solving one of technical problem can be again
Raw polycyclic aromatic hydrocarbon is converted into the purposes of the catalyst of mononuclear aromatics.
The four of the technical problems to be solved by the invention be to provide it is a kind of it is corresponding with solving one of technical problem can be again
Raw polycyclic aromatic hydrocarbon is converted into the renovation process of the catalyst of mononuclear aromatics.
To solve one of above-mentioned technical problem, the technical solution adopted by the present invention is as follows：A kind of reproducible polycyclic aromatic hydrocarbon
The catalyst of mononuclear aromatics is converted into, in terms of catalyst weight percent, including following components：
A) mixture of 30~65% MOR types zeolites and ZSM-12 molecular sieves；
B) 34.5~69.9% be bonding selected from gama-alumina, η-at least one of aluminum oxide or boehmite
Agent；
C) 0.1~0.5% selected from least one of Pt, Pd or Ir metal or its oxide.
In above-mentioned technical proposal, MOR types zeolite and ZSM-12 molecular sieves are Hydrogen or ammonium in used catalyst composition
Type, sodium weight content is less than 2%；In mixture by weight percentage, the amount of MOR types zeolite is 10~90%, ZSM-12 molecules
The amount of sieve is 10~90%.
To solve the two of above-mentioned technical problem, the technical solution adopted by the present invention is as follows：A kind of reproducible polycyclic aromatic hydrocarbon
The preparation method of the catalyst of mononuclear aromatics is converted into, is comprised the following steps：
1. by the mixture of the desired amount of MOR types zeolite and ZSM-12 molecular sieves with it is the desired amount of selected from gama-alumina,
The binding agent of at least one of η-aluminum oxide, boehmite is carried out after kneading, shaping, drying, in 450~650 DEG C of roastings
0.5~24h obtains catalyst carrier；
2. by the desired amount of precursor solution selected from least one of Pt, Pd or Ir metal or its oxide in 30
~50 DEG C are impregnated into 0.5~24h in catalyst carrier, and 0.5~24h is calcined at 300~450 DEG C after drying obtains finished product catalysis
Agent.
In above-mentioned technical proposal, preferred scheme is in catalyst carrier preparation process, and carrier dry basis 2 is pressed in addition
~5% extrusion aid, extrusion aid is at least one of sesbania powder or tung oil；Addition by carrier dry basis 3~6% into
Jelly, gelatinizing agent is selected from least one of hydrochloric acid, nitric acid, acetic acid, tartaric acid, citric acid or oxalic acid and water volume ratio 1：1~
1：5.
The precursor solution preferred scheme of Pt metal used is chloroplatinic acid in above-mentioned technical proposal；The predecessor of metal Pd
Solution preferred scheme is at least one of palladium nitrate or palladium bichloride；Metal Ir precursor solution preferred scheme is chloro-iridic acid.
To solve the three of above-mentioned technical problem, the technical solution adopted by the present invention is as follows：A kind of reproducible polycyclic aromatic hydrocarbon
The method of mononuclear aromatics is converted into, raw material Polycyclic Aromatic Hydrocarbon Mixture is mixed with hydrogen, beds is passed through, anti-
Answer 345 ~ 430 DEG C of temperature, the MPa of reaction pressure 4 ~ 7,1 ~ 5hr of weight (hourly) space velocity (WHSV) degree-1, hydrogen/hydrocarbon mol ratio 4.0 ~ 8.0
Contacted under part with above-mentioned catalyst described in any one, polycyclic aromatic hydrocarbon is converted into the monocyclic virtue comprising benzene,toluene,xylene
Hydrocarbon.
In above-mentioned technical proposal, technical scheme preferably is, reaction temperature is 350 ~ 390 DEG C, reaction pressure is 5 ~ 6
MPa, weight (hourly) space velocity (WHSV) degree are 1 ~ 2 hr-1, hydrogen/hydrocarbon mol ratio be 6.0 ~ 7.0.
To solve the four of above-mentioned technical problem, the technical solution adopted by the present invention is as follows：A kind of reproducible polycyclic aromatic hydrocarbon
The renovation process of the catalyst of mononuclear aromatics is converted into, the catalyst described in any one is laggard by described process conditions operation
During row regeneration, regeneration atmosphere be air or nitrogen that oxygen content is 1~5%, regeneration temperature be 400~500 DEG C, reaction pressure be
0.5~3MPa, recovery time are 6~48h.
In above-mentioned technical proposal, technical scheme preferably is, regeneration atmosphere be oxygen content be 2~3% nitrogen, regeneration temperature
Degree is 500 DEG C, reaction pressure be 0.5~1MPa, recovery time be 24~36h.
The catalyst that the present invention is provided is converted into the mononuclear aromatics such as benzene, toluene and dimethylbenzene available for heavy polycyclic aromatic hydrocarbon
In industrial production.
Because the MOR types zeolite that have selected the ZSM-12 molecular sieves containing macropore and good thermal stability is made in the present invention
For catalyst acid center, the acid site for being conducive to heavy arene macromolecular to enter in duct carries out ring-opening reaction, the production after conversion
Thing molecule can quickly be spread by duct, so as to delay the deactivation rate of catalyst, and be had good stability, and be conducive to fortune
Regeneration after the turn-week phase；By loading the precious metal element with hydrogenating function, its load capacity is controlled in a zone of reasonableness, can be with
The degree of unsaturation of Polycyclic Aromatic Hydrocarbon Mixture raw material is effectively improved, deep conversion polycyclic aromatic hydrocarbon is helped；Control the grain of metallic atom
Footpath and catalyst temperature in use, it helps the regenerability of catalyst is stable；Catalyst acid center and the conjunction of metallic element
Reason proportioning not only can be with the acid site of guard catalyst, and retains as far as possible during the course of the reaction original monocyclic in raw material stream
Aromatic component, so that the yield of mononuclear aromatics and selectivity are maximized, achieves preferable technique effect.
The present invention carries out the reactivity worth investigation that polycyclic aromatic hydrocarbon is converted into mononuclear aromatics using overcritical fixed bed reactors,
12 millimeters of reactor inside diameter Ф, 800 millimeters of length, stainless steel.Using electrical heating, temperature automatic control.Reactor bottom
It is 5 grams of catalyst filling in supporter, reactor to fill 2~3 millimeters of beades of Ф, and 2~3 millimeters of beades of Ф are filled on top,
It is made for raw material preheating and vaporization is used.Raw material Polycyclic Aromatic Hydrocarbon Mixture is mixed with hydrogen, passes through beds,
345 ~ 430 DEG C of reaction temperature, the MPa of reaction pressure 4 ~ 7, the hr of weight (hourly) space velocity (WHSV) degree 1 ~ 5-1, hydrogen/hydrocarbon mol ratio 4.0 ~ 8.0
Under conditions of contacted with catalyst, polycyclic aromatic hydrocarbon is converted into the mononuclear aromatics such as benzene,toluene,xylene.
Polycyclic Aromatic Hydrocarbon Mixture is autogamy raw material, and experimental data is calculated as follows.
Below by embodiment, the present invention is further elaborated.
Embodiment
【Embodiment 1】
It is 25 g MOR types zeolites (commercially available ammonium type), 25 g ZSM-12 molecular sieves (commercially available Hydrogen) and 50 g by butt
γ-Al2O3(industrial goods) add blender to uniform, and 3 g sesbania powders, 5 g volume ratios 1 are then added into mixture:1
HNO3Solution and 40 g deionized waters, the uniform dough being made suitable for extrusion of grinding.It is extruded by mould, shape is in elongated
Cylinder (mm of diameter 1.7), 120 DEG C drying after 550 DEG C be calcined 4 h, be then cut into the consistent carrier of size
Grain (1.7 × 4.0 mm), is designated as Z1.
Chloroplatinic acid wiring solution-forming is impregnated at 40 DEG C to carrier granular, the amount containing Pt is carrier butt in maceration extract
The 0.2% of weight, dipping 8h and after drying, in 450 DEG C of roastings 3 h, finished product catalyst A.
【Embodiment 2~10】
The preparation method and process provided according to embodiment 1, by changing metal front in carrier composition and maceration extract
The species and content of thing, are prepared for a series of finished catalysts, are shown in Table 1.
Table 1
【Embodiment 11~19】
With catalyst A~J (highest response pressure on overcritical fixed bed reactors made from embodiment 1~10
10MPa, temperature in use are room temperature~600 DEG C) investigate and Polycyclic Aromatic Hydrocarbon Mixture is converted into BTX (wherein B is benzene, and T is toluene, X
For dimethylbenzene) etc. mononuclear aromatics ability.Table 2 constitutes to evaluate raw material.The g of Catalyst packing 5, in 350 DEG C of reaction temperature, instead
Answer pressure 5.5MPa, weight (hourly) space velocity (WHSV) degree 2.0hr-1, contacted with catalyst under the conditions of hydrogen/hydrocarbon mol ratio 6.0, product is entered
Row is reclaimed and component detection, and conversion results are shown in Table 3.
Table 2
| Raw material is constituted | It is non-aromatic | Benzene | Toluene | Ethylbenzene | Dimethylbenzene | Decahydronaphthalene | Naphthane | Naphthalene |
| Content (wt%) | 0.02 | 24.54 | 24.61 | 5.00 | 0.02 | 14.81 | 15.25 | 15.75 |
Table 3
| Catalyst is numbered | Total conversion (wt%) | Mononuclear aromatics selectivity (wt%) | BTX selectivity (wt%) |
| A | 71.6 | 69.2 | 45.0 |
| B | 72.0 | 68.4 | 44.3 |
| C | 70.8 | 70.5 | 45.9 |
| D | 72.5 | 69.1 | 44.7 |
| E | 73.1 | 68.0 | 44.1 |
| F | 69.4 | 71.5 | 46.6 |
| G | 70.3 | 69.9 | 45.3 |
| H | 70.6 | 69.5 | 45.1 |
| I | 65.2 | 74.9 | 48.6 |
| J | 74.7 | 66.4 | 43.2 |
【Embodiment 20~24】
Investigated many cyclophanes with catalyst A~E made from embodiment 1~5 on overcritical fixed bed reactors after regeneration
Hydrocarbon mixture is converted into the ability of the mononuclear aromatics such as BTX.The g of Catalyst packing 5, in 360 DEG C of reaction temperature, reaction pressure
5.5MPa, the hr of weight (hourly) space velocity (WHSV) degree 2.0-1, contacted with catalyst under the conditions of hydrogen/hydrocarbon mol ratio 6.0, product is returned
Receive and component detection, conversion results are shown in Table 4.
Table 4
| Catalyst is numbered | Total conversion (wt%) | Mononuclear aromatics selectivity (wt%) | BTX selectivity (wt%) |
| A | 73.8 | 68.0 | 44.9 |
| B | 74.5 | 67.1 | 44.0 |
| C | 72.8 | 68.5 | 45.4 |
| D | 75.0 | 66.4 | 43.8 |
| E | 75.2 | 66.0 | 43.2 |
【Embodiment 25~29】
Investigated many cyclophanes with catalyst A~E made from embodiment 1~5 on overcritical fixed bed reactors after regeneration
Hydrocarbon mixture is converted into the ability of the mononuclear aromatics such as BTX.The g of Catalyst packing 5, in 350 DEG C of reaction temperature, reaction pressure
6.0MPa, the hr of weight (hourly) space velocity (WHSV) degree 2.0-1, contacted with catalyst under the conditions of hydrogen/hydrocarbon mol ratio 7.0, product is returned
Receive and component detection, conversion results are shown in Table 5.
Table 5
| Catalyst is numbered | Total conversion (wt%) | Mononuclear aromatics selectivity (wt%) | BTX selectivity (wt%) |
| A | 72.0 | 69.0 | 44.3 |
| B | 72.5 | 68.1 | 44.0 |
| C | 71.0 | 70.2 | 45.5 |
| D | 72.9 | 68.3 | 44.4 |
| E | 73.5 | 67.6 | 43.8 |
【Embodiment 30~34】
Investigated many cyclophanes with catalyst A~E made from embodiment 1~5 on overcritical fixed bed reactors after regeneration
Hydrocarbon mixture is converted into the ability of the mononuclear aromatics such as BTX.The g of Catalyst packing 5, in 350 DEG C of reaction temperature, reaction pressure
6.0MPa, the hr of weight (hourly) space velocity (WHSV) degree 1.0-1, contacted with catalyst under the conditions of hydrogen/hydrocarbon mol ratio 7.0, product is returned
Receive and component detection, conversion results are shown in Table 6.
Table 6
| Catalyst is numbered | Total conversion (wt%) | Mononuclear aromatics selectivity (wt%) | BTX selectivity (wt%) |
| A | 73.3 | 70.5 | 45.7 |
| B | 73.9 | 69.3 | 45.1 |
| C | 72.1 | 71.8 | 46.4 |
| D | 74.5 | 68.8 | 44.3 |
| E | 74.9 | 68.7 | 44.0 |
【Embodiment 35~39】
It is placed in after checking and rating 400hr with catalyst A made from embodiment 1~5~E in air atmosphere, 3hr liters under pressure 1MPa
Temperature to 500 DEG C of constant temperature, which regenerate after 8hr to load on overcritical fixed bed reactors, converts Polycyclic Aromatic Hydrocarbon Mixture after investigation regeneration
For the ability of the mononuclear aromatics such as BTX.The g of Catalyst packing 5, in 350 DEG C of reaction temperature, reaction pressure 5.5MPa, weight (hourly) space velocity (WHSV) degree
2.0 hr-1, contacted with catalyst under the conditions of hydrogen/hydrocarbon mol ratio 6.0, product is reclaimed and component detection, will be turned
Change result to be shown in Table 7.
Table 7
| Catalyst is numbered | Total conversion (wt%) | Mononuclear aromatics selectivity (wt%) | BTX selectivity (wt%) |
| A | 71.0 | 71.4 | 46.2 |
| B | 71.6 | 70.6 | 45.8 |
| C | 68.8 | 72.9 | 46.5 |
| D | 71.6 | 71.7 | 45.3 |
| E | 72.7 | 70.3 | 45.9 |
【Embodiment 40~44】
It is placed in after checking and rating 400hr with catalyst A made from embodiment 1~5~E in air atmosphere, 3hr under pressure 0.5MPa
It is warming up to load on overcritical fixed bed reactors after 500 DEG C of constant temperature regeneration 24hr and investigates Polycyclic Aromatic Hydrocarbon Mixture turn after regeneration
Turn to the ability of the mononuclear aromatics such as BTX.The g of Catalyst packing 5, in 350 DEG C of reaction temperature, reaction pressure 5.5MPa, weight (hourly) space velocity (WHSV)
Spend 2.0 hr-1, contacted with catalyst under the conditions of hydrogen/hydrocarbon mol ratio 6.0, product is reclaimed and component detection, will
Conversion results are shown in Table 8.
Table 8
| Catalyst is numbered | Total conversion (wt%) | Mononuclear aromatics selectivity (wt%) | BTX selectivity (wt%) |
| A | 71.3 | 72.0 | 46.8 |
| B | 72.0 | 71.0 | 46.0 |
| C | 69.3 | 73.1 | 47.1 |
| D | 72.1 | 72.4 | 45.9 |
| E | 72.5 | 70.7 | 46.2 |
Claims (10)
1. a kind of reproducible polycyclic aromatic hydrocarbon is converted into the catalyst of mononuclear aromatics, in terms of catalyst weight percent, by following
Component is constituted：
A) mixture of 30~65%MOR types zeolite and ZSM-12 molecular sieves；
B) 34.5~69.9% be binding agent selected from gama-alumina, η-at least one of aluminum oxide or boehmite；
C) 0.1~0.5% selected from least one of Pt, Pd or Ir metal or its oxide.
2. reproducible polycyclic aromatic hydrocarbon according to claim 1 is converted into the catalyst of mononuclear aromatics, it is characterised in that MOR
Type zeolite and ZSM-12 molecular sieves are Hydrogen or ammonium type, and sodium weight content is less than 2%；In mixture by weight percentage
The amount of MOR type zeolites is that the amount of 10~90%, ZSM-12 molecular sieves is 10~90%.
3. the reproducible polycyclic aromatic hydrocarbon described in claim 1 is converted into the preparation method of the catalyst of mononuclear aromatics, including with
Lower step：
1. the mixture of the desired amount of MOR types zeolite and the desired amount of ZSM-12 molecular sieves is selected from gamma oxidation with the desired amount of
Aluminium, the binding agent of η-at least one of aluminum oxide or boehmite are carried out after kneading, shaping, drying, at 450~650 DEG C
0.5~24h of roasting obtains catalyst carrier；
2. by the desired amount of precursor solution selected from least one of Pt, Pd or Ir metal or its oxide in 30~50 DEG C
0.5~24h in catalyst carrier is impregnated into, being calcined 0.5~24h at 300~450 DEG C after drying obtains finished catalyst.
4. reproducible polycyclic aromatic hydrocarbon according to claim 3 is converted into the preparation method of the catalyst of mononuclear aromatics, its
It is characterised by adding the extrusion aid by carrier dry basis 2~5% in catalyst carrier preparation process；It is prepared by catalyst carrier
During addition selected from least one of hydrochloric acid, nitric acid, acetic acid, tartaric acid, citric acid or oxalic acid acid solution be gelatinizing agent.
5. reproducible polycyclic aromatic hydrocarbon according to claim 4 is converted into the preparation method of the catalyst of mononuclear aromatics, its
It is at least one of sesbania powder or tung oil to be characterised by extrusion aid.
6. reproducible polycyclic aromatic hydrocarbon according to claim 4 is converted into the preparation method of the catalyst of mononuclear aromatics, its
It is characterised by with carrier dry basis, 3~6 weight % added in catalyst carrier preparation process gelatinizing agent, gelatinizing agent
In, the volume ratio selected from least one of hydrochloric acid, nitric acid, acetic acid, tartaric acid, citric acid or oxalic acid and water is 1：1~1：5.
7. reproducible polycyclic aromatic hydrocarbon according to claim 4 is converted into the preparation method of the catalyst of mononuclear aromatics, its
The precursor solution for being characterised by described Pt metal is chloroplatinic acid；The precursor solution of metal Pd is in palladium nitrate or palladium bichloride
At least one；Metal Ir precursor solution is chloro-iridic acid.
8. a kind of method that reproducible polycyclic aromatic hydrocarbon is converted into mononuclear aromatics, raw material Polycyclic Aromatic Hydrocarbon Mixture is mixed with hydrogen,
Beds are passed through, in 345~430 DEG C of reaction temperature, 4~7MPa of reaction pressure, 1~5hr of weight (hourly) space velocity (WHSV) degree-1, contacted with the catalyst described in any one in claim 1~2 under the conditions of hydrogen/hydrocarbon mol ratio 4.0~8.0, polycyclic aromatic hydrocarbon
It is converted into the mononuclear aromatics for including benzene,toluene,xylene.
9. the method that reproducible polycyclic aromatic hydrocarbon according to claim 8 is converted into mononuclear aromatics, it is characterised in that reaction
350~390 DEG C of temperature, 5~6MPa of reaction pressure, 1~2hr of weight (hourly) space velocity (WHSV) degree-1, under conditions of hydrogen/hydrocarbon mol ratio 6.0~7.0
Contacted with catalyst.
10. a kind of reproducible polycyclic aromatic hydrocarbon is converted into the renovation process of the catalyst of mononuclear aromatics, in claim 1~2
When catalyst described in any one after the process conditions operation of claim 8 or 9 by being regenerated, regeneration atmosphere for air or
Nitrogen that oxygen content is 1~5%, regeneration temperature are 400~500 DEG C, reaction pressure be 0.5~3MPa, recovery time be 6~
48h。
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|---|---|---|---|---|
| CN101045668A (en) * | 2006-03-27 | 2007-10-03 | 中国石油化工股份有限公司 | Method for high selection producing 8-C aromatic by 9C and its abover heavy aromatic |
| CN103120956A (en) * | 2011-11-18 | 2013-05-29 | 中国石油化工股份有限公司 | Catalyst for converting polycyclic aromatic hydrocarbons into monocyclic aromatic hydrocarbons to produce more dimethylbenzene and preparation method thereof |
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| CN104549469A (en) | 2015-04-29 |
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