CN108786905A - A kind of benzene, methanol alkylation preparing methylbenzene coproduction paraxylene catalyst in-situ preparation method - Google Patents

A kind of benzene, methanol alkylation preparing methylbenzene coproduction paraxylene catalyst in-situ preparation method Download PDF

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CN108786905A
CN108786905A CN201710289011.XA CN201710289011A CN108786905A CN 108786905 A CN108786905 A CN 108786905A CN 201710289011 A CN201710289011 A CN 201710289011A CN 108786905 A CN108786905 A CN 108786905A
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paraxylene
benzene
methanol
coproduction
catalyst
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CN108786905B (en
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于政锡
刘中民
朱书魁
杨越
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Dalian Institute of Chemical Physics of CAS
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Dalian Institute of Chemical Physics of CAS
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    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/40—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C1/00—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon
    • C07C1/20—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as heteroatoms
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2/00—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms
    • C07C2/86—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation between a hydrocarbon and a non-hydrocarbon
    • C07C2/862—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation between a hydrocarbon and a non-hydrocarbon the non-hydrocarbon contains only oxygen as hetero-atoms
    • C07C2/864—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation between a hydrocarbon and a non-hydrocarbon the non-hydrocarbon contains only oxygen as hetero-atoms the non-hydrocarbon is an alcohol
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2/00—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms
    • C07C2/86—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation between a hydrocarbon and a non-hydrocarbon
    • C07C2/862—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation between a hydrocarbon and a non-hydrocarbon the non-hydrocarbon contains only oxygen as hetero-atoms
    • C07C2/865—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation between a hydrocarbon and a non-hydrocarbon the non-hydrocarbon contains only oxygen as hetero-atoms the non-hydrocarbon is an ether
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
    • B01J2229/30—After treatment, characterised by the means used
    • B01J2229/32—Reaction with silicon compounds, e.g. TEOS, siliconfluoride
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
    • B01J2229/30—After treatment, characterised by the means used
    • B01J2229/34—Reaction with organic or organometallic compounds
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2529/00—Catalysts comprising molecular sieves
    • C07C2529/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites, pillared clays
    • C07C2529/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • C07C2529/40—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P30/00—Technologies relating to oil refining and petrochemical industry
    • Y02P30/20—Technologies relating to oil refining and petrochemical industry using bio-feedstock
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P30/00—Technologies relating to oil refining and petrochemical industry
    • Y02P30/40—Ethylene production

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Abstract

This application discloses the in-situ preparation methods of a kind of benzene, methanol alkylation preparing methylbenzene coproduction paraxylene catalyst, it is characterized in that, silylating reagent, vapor are contacted with the molecular sieve in reactor, the benzene, methanol alkylation preparing methylbenzene coproduction paraxylene catalyst is prepared in situ；The reactor is the reactor of benzene, methanol alkylation preparing methylbenzene coproduction paraxylene.The in-situ preparation method of the benzene, methanol alkylation preparing methylbenzene coproduction paraxylene catalyst simplifies the flow of entire Chemical Manufacture, saves catalyst preparation and transfer step by carrying out catalyst preparation directly in reaction system, easily operated.

Description

A kind of benzene, methanol alkylation preparing methylbenzene coproduction paraxylene catalyst system in situ Preparation Method
Technical field
This application involves the in-situ preparation method of a kind of benzene, the catalyst of methanol alkylation preparing methylbenzene coproduction paraxylene, Belong to field of chemical engineering.
Background technology
Toluene and paraxylene are the basic organic chemical industry raw materials of modern chemical industry.Currently, toluene is mainly by coal tar It is fractionated the aromatisation with oil and obtains, because containing the impurity such as alkane and micro methylthiophene, separating technology in production technology Complicated, production cost height.Paraxylene (PX) mainly for the production of p-phthalic acid (PTA), and then produce polyester resin and PBT resin etc..Extensive application of the polyester in fields such as textile garment, beverage packagings in recent years has driven PX yield and consumption figure Rapid growth.The production of PX mainly uses toluene, C9 aromatic hydrocarbons and mixed xylenes for raw material, passes through disproportionation, isomerization, absorption Separation or cryogenic separation and be made.Since the content of paraxylene in product is by balance controlled, paraxylene is different in dimethylbenzene 20% or so is only accounted in structure body, and the boiling point of three xylene isomers differs very little, cannot be obtained using common distillation technique To high-purity paraxylene, it is necessary to using expensive adsorptive separation technology.
Currently, China's benzene and methanol are excessive.Therefore, it is produced using the benzene of excess capacity and methanol direct alkylation The better toluene of industrial value and paraxylene, are conducive to the optimization of the conversion and aromatic hydrocarbon resource on the spot of benzene, and are opened up for methanol New utilization ways.Currently, actually rare in relation to the report that benzene is reacted with methanol direct alkylation.Patent CN102964201A discloses a kind of method of benzene and methanol alkylation high selectivity dimethylbenzene, catalyst ZSM-5, Molecular sieve carried metal oxide Mo, Ni or La modification gained of USY, MCM-22 or EU-1, wherein 8%La is loaded with ZSM-52O3 For catalyst when, benzene conversion ratio 42.5%, methanol conversion 93.7%, dimethylbenzene selective 76.5%.Patent It is to set that CN103418421A, which discloses a kind of coking benzene and methanol alkylation selectivity synthesis paraxylene catalyst, catalyst, In vapor heat after HZSM-5 molecular sieves or SAPO-11 molecular sieves be carrier supported metal oxide (iron, zinc, One or more of manganese, bismuth, copper and lead), when which is applied to coking benzene and methanol alkylation reaction, paraxylene Molar selectivity in aromatic product is up to 67%.Above-mentioned technology improves benzene first using transition metal modified method The overall selectivity of toluene and dimethylbenzene in alcohol alkylate, but paraxylene is in C8Aromatic hydrocarbons (including three dimethylbenzene and ethylbenzene) In selectivity low (or do not refer to paraxylene in C8Selectivity in aromatic hydrocarbons), the reason is that：(1) catalyst surface is acid It is not suitable for；(2) catalyst external surface still has a large amount of acid centre；(3) port size is larger.However, C8The boiling of aromatic hydrocarbons Point difference very little, the paraxylene of high-purity cannot be obtained using common distillation technique, it is necessary to using expensive adsorbing separation Technique causes increasing considerably for paraxylene production cost.
It is reacted with the highly selective paraxylene processed of methanol alkylation relative to toluene, benzene and the directly highly selective production of methanol Paraxylene is more difficult to realize, the reason is as follows that：(1) with methanol alkylated reaction production paraxylene occurs for benzene, must first pass through Benzene, the reaction of methanol alkylation preparing methylbenzene are crossed, reaction is more complicated；(2) in benzene, methanol alkylation reaction system, benzene feedstock can be with Alkylated reaction generation ethylbenzene occurs for the product ethylene in methanol itself conversion reaction, and (ethylbenzene is differed with the boiling point of three dimethylbenzene Very little), therefore not only need control port size and passivation outer surface acidity position different in three dimethylbenzene to improve paraxylene Para-selectivity in structure body, and need to modify inner surface Acidity to inhibit benzene alkylation with ethylene ethylbenzene to react.Phase Over the ground, toluene and benzene content in methanol alkylation reaction system are extremely low, therefore ethyl-benzene level is extremely low in product, only need to be passivated appearance Selectivity of the paraxylene in three xylene isomers can be improved in face acidic site and control port size, it is easier to realize Paraxylene is in C8It is highly selective in aromatic hydrocarbons.Currently, Chinese patent CN104710268A discloses a kind of benzyl alcohol alkylation The fluid catalyst and preparation method thereof for producing paraxylene, using silicone-based compound and alkali-earth metal modified ZSM- 5 molecular sieve catalysts, selectivity of the paraxylene in three xylene isomers>95wt%.The technology of above-mentioned report, although Higher PX selectivity is also obtained, but catalyst preparation process is complicated, needs repeatedly to be modified, roasting process, and need A series of Catalyst Plants are built, investment is huge；In addition, the technology does not refer to content of the toluene in aromatic hydrocarbon product And ethylbenzene is in C8Content in aromatic hydrocarbons.
Therefore, develop the benzene that a kind of process is simple, easily operated, methanol alkylation preparing methylbenzene coproduction paraxylene catalyst Online preparation method have very important significance and significant practical application.
Invention content
According to the one side of the application, the benzene that a kind of process is simple, easily operated, methanol alkylation preparing methylbenzene connection are provided Produce the in-situ preparation method of paraxylene catalyst.By carrying out catalyst preparation directly in reaction system, simplify entire The flow of Chemical Manufacture saves catalyst preparation and transfer step, easily operated, has broken in existing chemical field, first exists Catalyst production unit prepares finished catalyst, then transports to Chemical Manufacture unit, fill catalyst drive again production Traditional mode of production pattern overcomes the technology prejudice in heterogeneous catalysis field large-scale industrial production.
The in-situ preparation method of the benzene, methanol alkylation preparing methylbenzene coproduction paraxylene and light olefins catalyst, It is characterized in that, silylating reagent, vapor is contacted with the molecular sieve in reactor, the benzene, methanol alkylation is prepared in situ Preparing methylbenzene coproduction paraxylene catalyst；
The reactor is the reactor of benzene, methanol alkylation preparing methylbenzene coproduction paraxylene and low-carbon alkene.
In the application, benzene, methanol preparing methylbenzene coproduction paraxylene and low-carbon alkene, wherein raw material contain benzene and methanol, The case where middle methanol includes methanol and/or dimethyl ether.Unless otherwise instructed, the methanol in the application can be all or part of It is replaced by dimethyl ether, is related to the amount of methanol, the methanol that dimethyl ether can also be scaled to same carbon atoms number calculates.
The benzene feedstock and methanol of the application, wherein methanol include the form of methanol and/or dimethyl ether charging.Since methanol exists Dimethyl ether may be converted on catalyst, i.e. the effect of methanol and dimethyl ether in the feed communicates, so actual reaction What raw material was passed through is methanol and toluene, and methanol, dimethyl ether and toluene are often existed simultaneously on the catalyst of reactor.With Though lower raw material by taking methanol and toluene as an example, is not excluded for the case where containing dimethyl ether in raw material.The carbon of dimethyl ether is former in the calculation Sub- molal quantity that is, methanol molal quantity.
As an implementation, the silylating reagent is selected from least one of organo-silicon compound.Preferably, institute It states silylating reagent and is selected from least one of the compound with chemical formula shown in Formulas I：
R1, R2, R3, R4Independently selected from C1~C10Alkyl, C1~C10Alkoxy.
It is further preferred that R in the Formulas I1, R2, R3, R4Independently selected from C1~C5Alkyl, C1~C5Alkoxy.
Preferably, R in the Formulas I1, R2, R3, R4In at least one be selected from C1~C10Alkoxy.Further preferably Ground, the R1, R2, R3, R4In at least one be selected from C1~C5Alkoxy.It is further preferred that R in the Formulas I1, R2, R3, R4For identical alkoxy.
As an implementation, the silylating reagent be selected from quanmethyl silicate, tetraethyl orthosilicate, silicic acid orthocarbonate, At least one of tetrabutyl silicate.
As selectable embodiment, the reactor in fixed bed, fluid bed, moving-burden bed reactor at least It is a kind of.
As an implementation, the molecular sieve is according to type of reactor molded molecular sieve after molding；
The molded molecular sieve is made of molecular sieve；Or
Contain molecular sieve and binder in the molded molecular sieve.
As selectable embodiment, the molded molecular sieve by the broken molding of molecular sieve tabletting, by molecular sieve with it is viscous Broken strip is molded, molecular sieve and a kind of method in binder mixed atomizing drying and moulding is prepared after knot agent mixing extrusion.
Preferably, the molecular sieve is selected from the molecular sieve with MFI skeleton structures, the molecular sieve with MEL skeleton structures At least one of.It is further preferred that the molecular sieve is HZSM-5 molecular sieves and/or HZSM-11 molecular sieves.
Preferably, silica alumina ratio (atomic ratio) Si/Al=5~35 in the molecular sieve.
As an implementation, the benzene, methanol alkylation preparing methylbenzene coproduction paraxylene catalyst system in situ Preparation Method includes at least following steps：
(1) molded molecular sieve is placed in reactor；
(2) the material D containing silylating reagent is passed through into reactor；
(3) stop being passed through material D into reactor, temperature of reactor is risen to 500 DEG C or more and is passed through air roasting；
(4) after being passed through non-active gas purging, temperature of reactor is risen to 550 DEG C or more, is passed through the object containing vapor Expect after E carries out steam treatment to get to the catalyst of the benzene, methanol alkylation preparing methylbenzene coproduction paraxylene.
Material D contains silylating reagent and benzene in the step (2) as a preferred implementation manner,.
In material D, in addition to silylating reagent, however not excluded that can improve silylating reagent to molecular sieve modified effect containing other Rate and the reagent for not influencing catalyst reaction performance.
Preferably, under the conditions of step (2) is 130 DEG C~500 DEG C, the material containing silylating reagent is passed through into reactor D。
Those skilled in the art can be passed through in (2) into reactor according to the specific requirement in actual production, set-up procedure The air speed of material D and time.
Preferably, the weight space velocity of step (2) material D is 0.1h-1~1h-1, the time for being passed through material D is 0.1~5 small When.It is further preferred that the weight space velocity of step (2) material D is 0.2h-1~0.4h-1, the time for being passed through material D is 0.5~2 Hour.
Preferably, calcination temperature is 500 DEG C~700 DEG C in step (3), and roasting time is 1~6 hour.
Preferably, non-active gas described in step (4) is selected from least one of nitrogen, helium, argon gas.
Material E containing vapor can be 100% vapor, can also non-active gas and/or other can carry High (adjusting) vapor modification efficiency and the reagent for not influencing catalyst reaction performance.
Preferably, the temperature of steam treatment is 550 DEG C~800 DEG C in step (4), and processing time is 1~10 hour.
Preferably, the weight space velocity of vapor is 0.5h in step (4) material E-1~5h-1.It is further preferred that step (4) weight space velocity of vapor is 1h in material E-1~3h-1。
According to the another aspect of the application, a kind of method that benzene, methanol alkylation preparing methylbenzene coproduction paraxylene are provided, Be characterized in that, by the raw material containing methanol and benzene in the reactor be prepared in situ according to above-mentioned arbitrary the method The catalyst contact of benzene, methanol alkylation preparing methylbenzene coproduction paraxylene, prepares toluene coproduction paraxylene.That is, completing water Steam is modified, is directly down to reaction temperature from vapor modification temperature, proceeds by benzene, methanol alkylation preparing methylbenzene coproduction pair The reaction of dimethylbenzene.Compared with the intrinsic mode of production of chemical field, the washing separation process after catalyst modification, roasting are saved The catalyst cooling procedure of room temperature, transport catalyst step, Catalyst packing step, catalyst is down to after burning to be fitted into reactor After need preactivated step of high temperature etc., production efficiency greatly improved, avoid and be likely to occur in above-mentioned saved in step Safety problem；Importantly, reactor since calcination temperature be cooled to reaction temperature can react, thermal energy obtains fully It utilizes, substantially saves the energy consumption in production.
Preferably, the benzene, methanol alkylation preparing methylbenzene coproduction paraxylene reaction temperature be 350 DEG C~600 DEG C.Into One step preferably, the benzene, methanol alkylation preparing methylbenzene coproduction paraxylene reaction temperature be 400 DEG C~500 DEG C.
In the raw material containing methanol and benzene, the molar ratio of methanol and benzene is methanol：Benzene=0.5~2:1.Preferably, In the raw material containing methanol and benzene, the molar ratio of methanol and benzene is methanol：Benzene=1~1.5:1.
In the application, the C1~C10、C1~C5Etc. the carbon atom number for referring both to group and being included.
In the application, " alkyl " is to be formed by group by losing any one hydrogen atom on alkane compound molecule.Institute It includes linear paraffin, branched paraffin, cycloalkane, the cycloalkane with branch to state alkane compound.
In the application, " alkoxy " is formed by losing the hydrogen atom on hydroxyl on alkyl alcohols compound molecule Group.
In the application, " methanol and/or dimethyl ether " refers to that the methanol in charging can be all or part of by dimethyl ether generation It replaces, including three kinds of situations：Only methanol；Or only dimethyl ether；Or methanol and dimethyl ether have.Such as " containing methanol and/ Or dimethyl ether, benzene ", including three kinds of situations：Contain methanol and benzene；Or contain dimethyl ether and benzene；Or contain methanol, dimethyl ether And benzene.
The advantageous effect of the application includes but not limited to：
(1) in-situ preparation method of benzene provided herein, methanol alkylation preparing methylbenzene coproduction paraxylene catalyst, Break in existing chemical field, first prepared finished catalyst in catalyst production unit, then transport to Chemical Manufacture unit, Fill catalyst drive again production traditional mode of production pattern, overcome the skill in heterogeneous catalysis field large-scale industrial production Art prejudice.
(2) in-situ preparation method of benzene provided herein, methanol alkylation preparing methylbenzene coproduction paraxylene catalyst, The flow for simplifying entire Chemical Manufacture saves catalyst preparation and transfer step, easily operated.
(3) method of benzene provided herein, methanol alkylation preparing methylbenzene coproduction paraxylene, it is intrinsic with chemical field The mode of production compare, save the washing separation process after catalyst modification, the catalyst of being down to room temperature after roasting it is cooled Journey, transport catalyst step, Catalyst packing step, catalyst need preactivated step of high temperature etc. after being fitted into reactor, Production efficiency greatly improved, avoid in the above-mentioned safety problem saved and be likely to occur in step；Importantly, reaction Device since calcination temperature be cooled to reaction temperature can react, thermal energy is fully used, substantially save production in energy Consumption.
(4) method of benzene provided herein, methanol alkylation preparing methylbenzene coproduction paraxylene, from catalyst preparation to Reaction carries out, in situ in a system to complete, and in extensive Chemical Manufacture, is conducive to waste in catalyst preparation process Recycling and recycle, it is environmental-friendly.
(5) method of benzene provided herein, methanol alkylation preparing methylbenzene coproduction paraxylene, methanol conversion 100%, (toluene+paraxylene) selectivity in aromatic product>85wt%, Selectivity for paraxylene in xylene products> 99.6wt%, C8Selectivity for paraxylene in aromatic hydrocarbons>90wt%.
Description of the drawings
Fig. 1 is a kind of embodiment using the catalyst producing light olefins coproduction paraxylene reaction prepared by the application Process flow chart.
Fig. 2 is a kind of embodiment using the catalyst producing light olefins coproduction paraxylene reaction prepared by the application Process flow chart.
Fig. 3 is a kind of embodiment using the catalyst producing light olefins coproduction paraxylene reaction prepared by the application Process flow chart.
Fig. 4 is a kind of embodiment using the catalyst producing light olefins coproduction paraxylene reaction prepared by the application Process flow chart.
Fig. 5 is a kind of embodiment using the catalyst producing light olefins coproduction paraxylene reaction prepared by the application Process flow chart.
Fig. 6 is a kind of embodiment using the catalyst producing light olefins coproduction paraxylene reaction prepared by the application Process flow chart.
Specific implementation mode
The application is described in detail with reference to embodiment, but the application is not limited to these embodiments.
Unless otherwise specified, raw materials and reagents used herein are all from commercially available, unprocessed direct use, used Instrument and equipment uses the scheme and parameter of manufacturer's recommended.
In embodiment, catalyst abrasion index is measured in the MS-C type abrasion index of Hexing Mechanical-Electronic Co., Ltd., Shenyang city It is measured on instrument.
In embodiment, fixed bed reactors internal diameter is 1.5cm；Fixed fluidized-bed reactor internal diameter is 3cm；Recirculating fluidized bed Reactor inside diameter is 12cm.
The preparation of embodiment 1 fixed bed HZSM-5 molded molecular sieve samples
By 100g HZSM-5 zeolite molecular sieves original powder (Catalyst Factory, Nankai Univ, Si/Al=30) in air atmosphere, 550 After being roasted 4 hours at DEG C, compression molding is simultaneously crushed, sieves and obtain the molded molecular sieve particle of 40~60 mesh grain sizes, is denoted as FXHZSM-5-A。
By 100g HZSM-5 zeolite molecular sieves original powder (Catalyst Factory, Nankai Univ, Si/Al=5) in air atmosphere, 550 After being roasted 4 hours at DEG C, compression molding is simultaneously crushed, sieves and obtain the molded molecular sieve particle of 40~60 mesh grain sizes, is denoted as FXHZSM-5-B。
By 100g HZSM-5 zeolite molecular sieves original powder (Catalyst Factory, Nankai Univ, Si/Al=10) in air atmosphere, 550 After being roasted 4 hours at DEG C, compression molding is simultaneously crushed, sieves and obtain the molded molecular sieve particle of 40~60 mesh grain sizes, is denoted as FXHZSM-5-C。
The preparation of embodiment 2 fixed bed HZSM-11 molded molecular sieve samples
By 100g HZSM-11 zeolite molecular sieves original powder (Catalyst Factory, Nankai Univ, Si/Al=35) air atmosphere, After being roasted 4 hours at 550 DEG C, compression molding is simultaneously crushed, sieves and obtain the molded molecular sieve particle of 40~60 mesh grain sizes, is denoted as FXHZSM-11-A。
By 100g HZSM-11 zeolite molecular sieves original powder (Catalyst Factory, Nankai Univ, Si/Al=12) air atmosphere, After being roasted 4 hours at 550 DEG C, compression molding is simultaneously crushed, sieves and obtain the molded molecular sieve particle of 40~60 mesh grain sizes, is denoted as FXHZSM-11-B。
The preparation of embodiment 3 fluid bed HZSM-5 molded molecular sieve samples
By 100g HZSM-5 zeolite molecular sieves original powder (Catalyst Factory, Nankai Univ, Si/Al=30) and the nothing containing aluminium or silicon Shape binder mixed atomizing drying and moulding, the specific steps are：
HZSM-5 zeolite molecular sieves original powder, boehmite, Ludox, xanthans (biogum) and water are uniformly mixed, Slurry is obtained by mashing, glue mill, de-soak；The parts by weight of each component are in slurry：
The spray-dried molding of gained slurry obtains the microsphere particle sample of 20~100 μm of particle diameter distribution；By microsphere particle Sample in Muffle furnace 550 DEG C roasting 3 hours after, obtain abrasion index be 1.2 HZSM-5 molded molecular sieves, be denoted as FLHZSM-5-A。
The preparation of embodiment 4 fluid bed HZSM-5 molded molecular sieve samples
Specific preparation condition and step with embodiment 3, the difference is that, raw material HZSM-5 zeolite molecular sieve original powders Dosage is 10kg, and obtained microsphere particle sample particle diameter is distributed 20~120 μm, and abrasion index 1.2 is denoted as FLHZSM-5-B.
Specific preparation condition and step with embodiment 3, the difference is that, raw material HZSM-5 zeolite molecular sieve original powders Silica alumina ratio Si/Al=10, obtained microsphere particle sample particle diameter are distributed 20~100 μm, and abrasion index 1.2 is denoted as FLHZSM- 5-C。
The preparation of 5 fixed bed catalyst FXCAT-1 of embodiment and reaction evaluating
Methanol toluene producing light olefins coproduction paraxylene fixed bed is prepared online in miniature fixed-bed reactor to urge After agent, reactivity worth evaluation is carried out.
It is as follows to prepare catalysts conditions online：5g (40~60 mesh) molded molecular sieve sample Fs XHZSM-5-A is packed into and is fixed Bed reactor, first handles 1 hour at 550 DEG C through 50mL/min nitrogen, is then cooled to 200 DEG C in a nitrogen atmosphere.Front three The mixed liquor of oxygroup phosphorus, tetraethyl orthosilicate and toluene is fed with micro feed pump, trimethoxy phosphorus:Tetraethyl orthosilicate:Toluene (weight Measure ratio)=5:20:75, the total weight air speed 1h of trimethoxy phosphorus, tetraethyl orthosilicate and toluene-1, normal pressure.Stop after charging 90min It only feeds, after nitrogen purging, is warming up to 550 DEG C, is roasted 4 hours under air atmosphere, methanol toluene producing light olefins coproduction is made Paraxylene fixed bed catalyst, is named as FXCAT-1.Then, it is cooled to 450 DEG C of reaction temperature under nitrogen atmosphere, carries out first Alcohol toluene producing light olefins coproduction paraxylene reacts, and reaction condition is as follows：Raw material is fed with micro feed pump, material benzenemethanol: Toluene (molar ratio)=10:1, methanol and toluene total weight air speed 2h-1, normal pressure.Reaction product passes through online Agilent7890 gas Phase chromatography is analyzed, sampling analysis when reacting 60min.Reaction result is as shown in table 1.
Table 1
Catalyst FXCAT-1
Reaction temperature (DEG C) 450
Methanol conversion (%) 100
Toluene conversion (%) 36.09
Paraxylene selectivity (wt%) in xylene isomer 99.64
Product is distributed (wt%)
Chain hydrocarbon 77.74
Benzene 0.06
Ethylbenzene 0.25
Paraxylene 19.26
Meta-xylene 0.04
Ortho-xylene 0.03
C9+Aromatic hydrocarbons 2.61
Chain hydrocarbon product distribution (wt%)
CH4 1.26
C2H4 39.84
C2H6 0.1
C3H6 35.32
C3H8 0.89
C4 11.99
C5 5.06
C6+ 5.53
C2H4+C3H6 75.16
The preparation of 6 fixed bed catalyst FXCAT-2 of embodiment and reaction evaluating
Methanol toluene producing light olefins coproduction paraxylene fixed bed is prepared online in miniature fixed-bed reactor to urge After agent, reactivity worth evaluation is carried out.
It is as follows to prepare catalysts conditions online：5g (40-60 mesh) molded molecular sieve sample Fs XHZSM-5-A is packed into miniature Fixed bed reactors first handle 1 hour at 550 DEG C through 50mL/min nitrogen, 200 DEG C are then cooled under nitrogen atmosphere.Three The mixed liquor of methoxyl group phosphorus, tetraethyl orthosilicate and toluene is fed with micro feed pump, trimethoxy phosphorus:Tetraethyl orthosilicate:Toluene (weight ratio)=10:40:50, the total weight air speed 1h of trimethoxy phosphorus, tetraethyl orthosilicate and toluene-1, normal pressure.Feed 45min Stop charging afterwards, nitrogen purging is warming up to 550 DEG C, is roasted 4 hours under air atmosphere, and methanol toluene producing light olefins connection is made Paraxylene fixed bed catalyst is produced, FXCAT-2 is named as.Then, it is cooled to 450 DEG C of reaction temperature under nitrogen atmosphere, carries out Methanol toluene producing light olefins coproduction paraxylene reacts, and reaction condition is as follows：Raw material is fed with micro feed pump, raw material first Alcohol:Toluene (molar ratio)=10:1, methanol and toluene total weight air speed 2h-1, normal pressure.Reaction product passes through online Agilent7890 gas-chromatographies are analyzed, sampling analysis when reacting 60min.Reaction result is as shown in table 2.
Table 2
Catalyst FXCAT-2
Reaction temperature (DEG C) 450
Methanol conversion (%) 100
Toluene conversion (%) 36.68
Paraxylene selectivity (wt%) in xylene isomer 99.64
Product is distributed (wt%)
Chain hydrocarbon 77.59
Benzene 0.08
Ethylbenzene 0.29
Paraxylene 19.18
Meta-xylene 0.04
Ortho-xylene 0.03
C9+Aromatic hydrocarbons 2.79
Chain hydrocarbon product distribution (wt%)
CH4 1.23
C2H4 39.76
C2H6 0.13
C3H6 35.25
C3H8 0.96
C4 12.06
C5 5.11
C6+ 5.5
C2H4+C3H6 75.01
The preparation of 7 fixed bed catalyst FXCAT-3 of embodiment and reaction evaluating
Methanol toluene producing light olefins coproduction paraxylene fixed bed is prepared online in miniature fixed-bed reactor to urge After agent, reactivity worth evaluation is carried out.
It is as follows to prepare catalysts conditions online：5g (40-60 mesh) molded molecular sieve sample Fs XHZSM-5-A is packed into miniature Fixed bed reactors first handle 1 hour at 550 DEG C through 50mL/min nitrogen, 200 DEG C are then cooled under nitrogen atmosphere.Three The mixed liquor of methoxyl group phosphorus, tetraethyl orthosilicate and toluene is fed with micro feed pump, trimethoxy phosphorus:Tetraethyl orthosilicate:Toluene (weight ratio)=2:8:90, the total weight air speed 1h of trimethoxy phosphorus, tetraethyl orthosilicate and toluene-1, normal pressure.After feeding 225min Stop charging, nitrogen purging is warming up to 550 DEG C, is roasted 4 hours under air atmosphere, methanol toluene producing light olefins coproduction is made Paraxylene fixed bed catalyst, is named as FXCAT-3.Then, it is cooled to 450 DEG C of reaction temperature under nitrogen atmosphere, carries out first Alcohol toluene producing light olefins coproduction paraxylene reacts, and reaction condition is as follows：Raw material is fed with micro feed pump, material benzenemethanol: Toluene (molar ratio)=10:1, methanol and toluene total weight air speed 2h-1, normal pressure.Reaction product passes through online Agilent7890 gas Phase chromatography is analyzed, sampling analysis when reacting 60min.Reaction result is as shown in table 3.
Table 3
Catalyst FXCAT-3
Reaction temperature (DEG C) 450
Methanol conversion (%) 100
Toluene conversion (%) 35.59
Paraxylene selectivity (wt%) in xylene isomer 99.69
Product is distributed (wt%)
Chain hydrocarbon 77.9
Benzene 0.06
Ethylbenzene 0.21
Paraxylene 19.19
Meta-xylene 0.03
Ortho-xylene 0.03
C9+Aromatic hydrocarbons 2.58
Chain hydrocarbon product distribution (wt%)
CH4 1.31
C2H4 39.91
C2H6 0.09
C3H6 35.46
C3H8 0.83
C4 11.91
C5 5.01
C6+ 5.48
C2H4+C3H6 75.37
The preparation of 8 fixed bed catalyst FXCAT-4 of embodiment and reaction evaluating
Methanol toluene producing light olefins coproduction paraxylene fixed bed is prepared online in miniature fixed-bed reactor to urge After agent, reactivity worth evaluation is carried out.
It is as follows to prepare catalysts conditions online：5g (40-60 mesh) molded molecular sieve sample Fs XHZSM-5-A is packed into miniature Fixed bed reactors first handle 1 hour at 550 DEG C through 50mL/min nitrogen, 300 DEG C are then cooled under nitrogen atmosphere.Three The mixed liquor of methoxyl group phosphorus, tetraethyl orthosilicate and toluene is fed with micro feed pump, trimethoxy phosphorus:Tetraethyl orthosilicate:Toluene (weight ratio)=5:20:75, the total weight air speed 1h of trimethoxy phosphorus, tetraethyl orthosilicate and toluene-1, normal pressure.After feeding 90min Stop charging, nitrogen purging is warming up to 550 DEG C, is roasted 4 hours under air atmosphere, methanol toluene producing light olefins coproduction is made Paraxylene fixed bed catalyst, is named as FXCAT-4.Then, it is cooled to 450 DEG C of reaction temperature under nitrogen atmosphere, carries out first Alcohol toluene producing light olefins coproduction paraxylene reacts, and reaction condition is as follows：Raw material is fed with micro feed pump, material benzenemethanol: Toluene (molar ratio)=10:1, methanol and toluene total weight air speed 2h-1, normal pressure.Reaction product passes through online Agilent7890 gas Phase chromatography is analyzed, sampling analysis when reacting 60min.Reaction result is as shown in table 4.
Table 4
The preparation of 9 fixed bed catalyst FXCAT-5 of embodiment and reaction evaluating
Methanol toluene producing light olefins coproduction paraxylene fixed bed is prepared online in miniature fixed-bed reactor to urge After agent, reactivity worth evaluation is carried out.
It is as follows to prepare catalysts conditions online：5g (40-60 mesh) molded molecular sieve sample Fs XHZSM-5-A is packed into miniature Fixed bed reactors first handle 1 hour at 550 DEG C through 50mL/min nitrogen, 450 DEG C are then cooled under nitrogen atmosphere.Three The mixed liquor of methoxyl group phosphorus, tetraethyl orthosilicate and toluene is fed with micro feed pump, trimethoxy phosphorus:Tetraethyl orthosilicate:Toluene (weight ratio)=5:20:75, the total weight air speed 1h of trimethoxy phosphorus, tetraethyl orthosilicate and toluene-1, normal pressure.After feeding 90min Stop charging, nitrogen purging is warming up to 550 DEG C, is roasted 4 hours under air atmosphere, methanol toluene producing light olefins coproduction is made Paraxylene fixed bed catalyst, is named as FXCAT-5.Then, it is cooled to 450 DEG C of reaction temperature under nitrogen atmosphere, carries out first Alcohol toluene producing light olefins coproduction paraxylene reacts, and reaction condition is as follows：Raw material is fed with micro feed pump, material benzenemethanol: Toluene (molar ratio)=10:1, methanol and toluene total weight air speed 2h-1, normal pressure.Reaction product passes through online Agilent7890 gas Phase chromatography is analyzed, sampling analysis when reacting 60min.Reaction result is as shown in table 5.
Table 5
Catalyst FXCAT-5
Reaction temperature (DEG C) 450
Methanol conversion (%) 100
Toluene conversion (%) 35.80
Paraxylene selectivity (wt%) in xylene isomer 99.63
Product is distributed (wt%)
Chain hydrocarbon 75.29
Benzene 0.07
Ethylbenzene 0.35
Paraxylene 21.32
Meta-xylene 0.05
Ortho-xylene 0.03
C9+Aromatic hydrocarbons 2.89
Chain hydrocarbon product distribution (wt%)
CH4 1.08
C2H4 40.96
C2H6 0.11
C3H6 36.49
C3H8 1.41
C4 12.65
C5 3.76
C6+ 3.54
C2H4+C3H6 77.45
The preparation of 10 fixed bed catalyst FXCAT-6 of embodiment and reaction evaluating
Methanol toluene producing light olefins coproduction paraxylene fixed bed is prepared online in miniature fixed-bed reactor to urge After agent, reactivity worth evaluation is carried out.
It is as follows to prepare catalysts conditions online：5g (40-60 mesh) molded molecular sieve sample Fs XHZSM-5-A is packed into miniature Fixed bed reactors first handle 1 hour at 550 DEG C through 50mL/min nitrogen, 150 DEG C are then cooled under nitrogen atmosphere.Three The mixed liquor of methoxyl group phosphorus, quanmethyl silicate and toluene is fed with micro feed pump, trimethoxy phosphorus:Quanmethyl silicate:Toluene (weight ratio)=5:20:75, the total weight air speed 1h of trimethoxy phosphorus, quanmethyl silicate and toluene-1, normal pressure.After feeding 90min Stop charging, nitrogen purging is warming up to 550 DEG C, is roasted 4 hours under air atmosphere, methanol toluene producing light olefins coproduction is made Paraxylene fixed bed catalyst, is named as FXCAT-6.Then, it is cooled to 450 DEG C of reaction temperature under nitrogen atmosphere, carries out first Alcohol toluene producing light olefins coproduction paraxylene reacts, and reaction condition is as follows：Raw material is fed with micro feed pump, material benzenemethanol: Toluene (molar ratio)=10:1, methanol and toluene total weight air speed 2h-1, normal pressure.Reaction product passes through online Agilent7890 gas Phase chromatography is analyzed, sampling analysis when reacting 60min.Reaction result is as shown in table 6.
Table 6
Catalyst FXCAT-6
Reaction temperature (DEG C) 450
Methanol conversion (%) 100
Toluene conversion (%) 34.79
Paraxylene selectivity (wt%) in xylene isomer 99.95
Product is distributed (wt%)
Chain hydrocarbon 78.37
Benzene 0.08
Ethylbenzene 0.21
Paraxylene 19.98
Meta-xylene 0
Ortho-xylene 0.01
C9+Aromatic hydrocarbons 1.35
Chain hydrocarbon product distribution (wt%)
CH4 0.96
C2H4 41.03
C2H6 0.11
C3H6 37.96
C3H8 1.03
C4 11.01
C5 4.08
C6+ 3.82
C2H4+C3H6 78.99
The preparation of 11 fixed bed catalyst FXCAT-7 of embodiment and reaction evaluating
Methanol toluene producing light olefins coproduction paraxylene fixed bed is prepared online in miniature fixed-bed reactor to urge After agent, reactivity worth evaluation is carried out.
It is as follows to prepare catalysts conditions online：5g (40-60 mesh) molded molecular sieve sample Fs XHZSM-11-A is packed into miniature Fixed bed reactors first handle 1 hour at 550 DEG C through 50mL/min nitrogen, 300 DEG C are then cooled under nitrogen atmosphere.Three The mixed liquor of methoxyl group phosphorus, tetraethyl orthosilicate and toluene is fed with micro feed pump, trimethoxy phosphorus:Tetraethyl orthosilicate:Toluene (weight ratio)=5:20:75, the total weight air speed 1h of trimethoxy phosphorus, tetraethyl orthosilicate and toluene-1, normal pressure.After feeding 90min Stop charging, nitrogen purging is warming up to 550 DEG C, is roasted 4 hours under air atmosphere, methanol toluene producing light olefins coproduction is made Paraxylene fixed bed catalyst, is named as FXCAT-7.Then, it is cooled to 450 DEG C of reaction temperature under nitrogen atmosphere, carries out first Alcohol toluene producing light olefins coproduction paraxylene reacts, and reaction condition is as follows：Raw material is fed with micro feed pump, material benzenemethanol: Toluene (molar ratio)=10:1, methanol and toluene total weight air speed 2h-1, normal pressure.Reaction product passes through online Agilent7890 gas Phase chromatography is analyzed, sampling analysis when reacting 60min.Reaction result is as shown in table 7.
Table 7
The preparation of 12 fluid catalyst FLCAT-1 of embodiment and reaction evaluating
Methanol toluene paraxylene co-producing light olefins fluid bed is prepared online in fixed fluidized bed reaction unit to urge After agent, reactivity worth evaluation is carried out.
It is as follows to prepare catalysts conditions online：The molded molecular sieve sample F LHZSM-5-A dresses that will be prepared in 10g embodiments 3 Enter fixed fluidized-bed reactor, is first handled 1 hour at 550 DEG C through 50mL/min nitrogen, be then cooled to 300 under nitrogen atmosphere ℃.The mixed liquor of trimethoxy phosphorus, tetraethyl orthosilicate and toluene is fed with micro feed pump, trimethoxy phosphorus:Tetraethyl orthosilicate: Toluene (weight ratio)=5:20:75, the total weight air speed 1h of trimethoxy phosphorus, tetraethyl orthosilicate and toluene-1, normal pressure.Charging Stop charging after 90min, nitrogen purging is warming up to 550 DEG C, is roasted 4 hours under air atmosphere, obtained methanol toluene low-carbon alkene Hydrocarbon coproduction paraxylene fluid catalyst, is named as FLCAT-1.Then, 450 DEG C of reaction temperature is cooled under nitrogen atmosphere, The reaction of methanol toluene producing light olefins coproduction paraxylene is tested, reaction condition is as follows：Raw material is fed with micro feed pump, raw material Methanol:Toluene (molar ratio)=10:1, methanol and toluene total weight air speed 2h-1, normal pressure.Reaction product passes through online Agilent7890 gas-chromatographies are analyzed, sampling analysis when reacting 60min.Reaction result is as shown in table 8.
Table 8
The preparation and reaction of 13 fixed bed catalyst FXCAT-8 of embodiment
Using miniature fixed-bed reactor, using methanol toluene as raw material producing light olefins coproduction paraxylene.
It is as follows that catalysts conditions are prepared in situ：5g (40-60 mesh) molded molecular sieve sample Fs XHZSM-5-A is packed into miniature Fixed bed reactors first handle 1 hour at 550 DEG C through 50mL/min nitrogen, 300 DEG C are then cooled under nitrogen atmosphere.Three The mixed liquor of methoxyl group phosphorus, tetraethyl orthosilicate and toluene is fed with micro feed pump, trimethoxy phosphorus:Tetraethyl orthosilicate:Toluene (weight ratio)=5:20:75, the total weight air speed 1h of trimethoxy phosphorus, tetraethyl orthosilicate and toluene-1, normal pressure.After feeding 90min Stop charging, nitrogen purging is warming up to 550 DEG C, is roasted 4 hours under air atmosphere, methanol toluene producing light olefins coproduction is made Paraxylene fixed bed catalyst, is named as FXCAT-8.Then, it is cooled to 450 DEG C of reaction temperature under nitrogen atmosphere, carries out first Alcohol toluene producing light olefins coproduction paraxylene reacts, and reaction condition is as follows：Raw material is fed with micro feed pump, material benzenemethanol: Toluene (molar ratio)=10:1, methanol and toluene total weight air speed 2h-1, normal pressure.Reaction product passes through online Agilent7890 gas Phase chromatography is analyzed, sampling analysis when reacting 120min.Reaction result is as shown in table 9.
Table 9
Catalyst FXCAT-8
Reaction temperature (DEG C) 450
Methanol conversion (%) 100
Toluene conversion (%) 35.20
(C in chain hydrocarbon products2H4+C3H6) selectivity (wt%) 73.55
Paraxylene selectivity (wt%) in xylene isomer 99.71
Hydrocarbon product is distributed (wt%)
CH4 0.84
C2H4 30.09
C2H6 0.08
C3H6 25.84
C3H8 0.90
C4Alkene 9.25
C4Alkane 1.55
C5+Chain hydrocarbon 7.49
Benzene 0.09
Ethylbenzene 0.35
Paraxylene 20.33
Meta-xylene 0.04
Ortho-xylene 0.02
C9+Aromatic hydrocarbons 3.14
The preparation and reaction of 14 fixed bed catalyst FXCAT-9 of embodiment
According to a kind of embodiment of the application, as shown in Figure 1, stream I includes methanol and toluene, it is original with methanol toluene Expect producing light olefins coproduction paraxylene.
Equipped with the molded molecular sieve sample F XHZSM-5-A prepared in 5g (40-60 mesh) embodiment 1 in reaction system, first pass through 50mL/min nitrogen is handled 1 hour at 550 DEG C, and 300 DEG C are then cooled under nitrogen atmosphere.Trimethoxy phosphorus, silicic acid tetrem The mixed liquor of ester and toluene is fed with micro feed pump, trimethoxy phosphorus:Tetraethyl orthosilicate:Toluene (weight ratio)=5:20:75, The total weight air speed 1h of trimethoxy phosphorus, tetraethyl orthosilicate and toluene-1, normal pressure.Charging stops charging after 90 minutes, and nitrogen is blown It sweeps, is warming up to 550 DEG C, roasted 4 hours under air atmosphere, methanol toluene producing light olefins coproduction paraxylene fixed bed is made and urges Agent is named as FXCAT-9.
Stream I is passed through reaction system and contacts and react with catalyst FXCAT-9.Stream I I containing product leaves reaction system It unites and enters piece-rate system, isolate low-carbon alkene (ethylene and propylene), C4Alkene, paraxylene and other components.Wherein, C4 Alkene Returning reacting system, low-carbon alkene (ethylene and propylene) and paraxylene are as product.Other components are as by-product.
Reaction condition is as follows：Raw material is fed with micro feed pump, the material benzenemethanol of stream I:Toluene (molar ratio)=10:1, Methanol and toluene total weight air speed 2h-1, 450 DEG C of reaction temperature, normal pressure.Product by online Agilent7890 gas-chromatographies into Row analysis, as shown in table 10.
Table 10
Catalyst FXCAT-9
Reaction temperature (DEG C) 450
Methanol conversion (%) 100
Toluene conversion (%) 37.01
(C in chain hydrocarbon products2H4+C3H6) selectivity (wt%) 82.19
Paraxylene selectivity (wt%) in xylene isomer 99.62
Hydrocarbon product is distributed (wt%)
CH4 0.99
C2H4 31.87
C2H6 0.19
C3H6 27.54
C3H8 1.87
C4Alkane 1.62
C5+Chain hydrocarbon 8.2
Benzene 0.58
Ethylbenzene 0.46
Paraxylene 23.1
Meta-xylene 0.05
Ortho-xylene 0.03
C9+Aromatic hydrocarbons 3.5
The preparation and reaction of 15 fixed bed catalyst FXCAT-10 of embodiment
According to a kind of embodiment of the application, as shown in Fig. 2, stream I includes dimethyl ether and toluene, with dimethyl ether toluene For raw material producing light olefins coproduction paraxylene.
Difference lies in piece-rate systems with embodiment 14, remaining is identical as embodiment 14, and fixed bed catalyst, name is made For FXCAT-10.The piece-rate system of the present embodiment isolates C1~3Chain hydrocarbon, C4Alkene, C4Alkane, C5+Chain hydrocarbon, aromatic hydrocarbons.Wherein, C4 Alkene Returning reacting system.From C1~3Ethylene and propylene are isolated in chain hydrocarbon, as low-carbon alkene product.It is isolated from aromatic hydrocarbons Paraxylene, as product.Other components are as by-product.Reaction result and embodiment 14 are consistent (deviation is no more than ± 1%).
The preparation and reaction of embodiment 16 fixed bed catalyst FXCAT-11 and fluid bed FLCAT-12
According to a kind of embodiment of the application, according to process flow chart shown in Fig. 3, stream I includes methanol and first Benzene, using methanol toluene as raw material producing light olefins coproduction paraxylene.
First reaction zone is 10 fixed bed parallel connections, and second reaction zone is a fluid bed.
The molded molecular sieve sample F XHZSM-5-A prepared in 50g (40-60 mesh) embodiment 1 is packed into the first reaction zone In 10 fixed beds, 5g is loaded in each fixed bed, each fixed bed is first handled 1 hour through 50mL/min nitrogen at 550 DEG C, Then 300 DEG C are cooled under nitrogen atmosphere.The mixed liquor of trimethoxy phosphorus, tetraethyl orthosilicate and toluene with micro feed pump into Material, trimethoxy phosphorus:Tetraethyl orthosilicate:Toluene (weight ratio)=5:20:75, trimethoxy phosphorus, tetraethyl orthosilicate and toluene Total weight air speed 1h-1, normal pressure.Charging stops charging after 90 minutes, nitrogen purging is warming up to 550 DEG C, 4 are roasted under air atmosphere Hour, methanol toluene producing light olefins coproduction paraxylene fixed bed catalyst is made, is named as FXCAT-11.
The microballoon sieve sample FLHZSM-5-B prepared in 50g (40-60 mesh) embodiment 4 is packed into second reaction zone In fluid bed, is first handled 1 hour at 550 DEG C through 500mL/min nitrogen, 200 DEG C are then cooled under nitrogen atmosphere.Silicic acid four The mixed liquor of ethyl ester and methanol is fed with micro feed pump, is entered in the fluid bed of second reaction zone after vaporization, tetraethyl orthosilicate: Methanol (weight ratio)=40:60, the total weight air speed 2h of tetraethyl orthosilicate and methanol-1, normal pressure.Charging stops charging after 3 hours, Nitrogen purges, and is warming up to 550 DEG C, is roasted 4 hours under air atmosphere, and it is solid that methanol toluene producing light olefins coproduction paraxylene is made Bed catalyst is named as FLCAT-12.
First reaction zone carries out the reaction of methanol conversion and alkylation of toluene methanol reaction, and reaction condition is as follows：Raw material is with micro- Measure feed pump charging, material benzenemethanol:Toluene (molar ratio)=10:1, methanol and toluene total weight air speed 2h-1, reaction temperature 450 DEG C, normal pressure.The fixed bed that stream I is passed through the first reaction zone is contacted with catalyst FXCAT-11, obtains stream I I-A, stream I I-A It leaves the first reaction zone and enters piece-rate system.Ethylene, propylene, C are isolated from piece-rate system4Alkene and paraxylene.It will The C isolated in piece-rate system4Alkene is passed through in the fluid bed of second reaction zone and is contacted with catalyst FXCAT-12, and second anti- Area is answered to carry out the shape-selective aromatization of fluid bed, 450 DEG C of reaction temperature.Second reaction zone obtains stream I I-B, stream I I-B It leaves second reaction zone and enters piece-rate system.The ethylene and propylene isolated from piece-rate system as low-carbon alkene product, Paraxylene is as product.Other components are as by-product.
The hydrocarbon product of second reaction zone is analyzed by online Agilent7890 gas-chromatographies, as shown in table 11；Button Except C4Product distribution is as shown in table 12 after olefin component.First reaction zone and second reaction zone hydrocarbon mixture product by Line Agilent7890 gas-chromatographies are analyzed, and C is deducted4Product distribution is as shown in table 13 after olefin component.
Table 11
C4Olefin conversion (%) 83.25
Paraxylene selectivity (wt%) in xylene isomer 99.56
Hydrocarbon product is distributed (wt%)
CH4 0.74
C2H4 0.60
C2H6 1.02
C3H6 0.26
C3H8 9.55
C4Alkene 16.76
C4Alkane 0.04
C5+ 0.23
Benzene 4.94
Toluene 35.74
Ethylbenzene 0.90
Paraxylene 27.07
Meta-xylene 0.07
Ortho-xylene 0.05
C9+Aromatic hydrocarbons 2.03
Table 12
C4Olefin conversion (%) 83.25
Paraxylene selectivity (wt%) in xylene isomer 99.56
Hydrocarbon product is distributed (wt%)
CH4 0.89
C2H4 0.72
C2H6 1.22
C3H6 0.31
C3H8 11.47
C4Alkane 0.05
C5+Chain hydrocarbon 0.28
Benzene 5.93
Toluene 42.94
Ethylbenzene 1.08
Paraxylene 32.52
Meta-xylene 0.08
Ortho-xylene 0.06
C9+Aromatic hydrocarbons 2.44
Table 13
Methanol conversion (%) 100
Toluene conversion (%) 38.08
(C in chain hydrocarbon products2H4+C3H6) selectivity (wt%) 82.44
Paraxylene selectivity (wt%) in xylene isomer 99.69
Hydrocarbon product is distributed (wt%)
CH4 0.94
C2H4 31.68
C2H6 0.19
C3H6 27.18
C3H8 1.85
C4Alkane 1.64
C5+Chain hydrocarbon 7.90
Benzene 0.58
Ethylbenzene 0.46
Paraxylene 24.00
Meta-xylene 0.05
Ortho-xylene 0.03
C9+Aromatic hydrocarbons 3.50
The preparation and reaction of embodiment 17 catalyst FXCAT-13 and FLCAT-14
According to a kind of embodiment of the application, as shown in figure 4, stream I includes dimethyl ether, methanol and toluene, with diformazan Ether, methanol and toluene are raw material producing light olefins coproduction paraxylene.
Difference lies in the first reaction zone it is 1 fixed bed, filling 50g sieve samples FXHZSM-5- with embodiment 16 A.Also piece-rate system is different, and the piece-rate system of the present embodiment isolates C1~3Chain hydrocarbon, C4Alkene, C4Alkane, C5+Chain hydrocarbon, aromatic hydrocarbons. Wherein, C4Alkene returns to second reaction zone.From C1~3Ethylene and propylene are isolated in chain hydrocarbon, as low-carbon alkene product.From aromatic hydrocarbons In isolate paraxylene, as product.Other components are as by-product.Remaining is identical as embodiment 23, and obtained fixed bed is urged Agent is named as FXCAT-13, and obtained fluid catalyst is named as FLCAT-14.Reaction result and the consistent (deviation of embodiment 16 No more than ± 1%).
The preparation and reaction of 18 fixed bed catalyst FXCAT-15 of embodiment
According to a kind of embodiment of the application, according to process flow chart shown in Fig. 5, using methanol and toluene as raw material Producing light olefins coproduction paraxylene.Stream I includes methanol and toluene.
Reaction system is two fixed beds reaction system position as shown in Figure 5 arranged in series up and down, using sectional feeding Mode, stream I from the fixed bed on top feed, the C of freshening5+Chain hydrocarbon enters the fixed bed of lower part.
The molded molecular sieve sample F XHZSM-5-A prepared in 10g (40-60 mesh) embodiment 1 is respectively charged into two fixations In bed, two fixed bed loadings are identical, are 5g.Catalyst preparation process：Each fixed bed is through 50mL/min nitrogen 550 It is handled 1 hour at DEG C, 300 DEG C is then cooled under nitrogen atmosphere.The mixed liquor of trimethoxy phosphorus, tetraethyl orthosilicate and toluene is used Micro feed pump charging, trimethoxy phosphorus:Tetraethyl orthosilicate:Toluene (weight ratio)=5:20:75, trimethoxy phosphorus, silicic acid four The total weight air speed 1h of ethyl ester and toluene-1, normal pressure.Charging stops charging after 90 minutes, nitrogen purging is warming up to 550 DEG C, air It is roasted 4 hours under atmosphere.Obtained methanol toluene producing light olefins coproduction paraxylene fixed bed catalyst in situ, is denoted as FXCAT- 15。
Stream I enters the fixed bed reactors on reaction system top, is contacted with catalyst FXCAT-15 and carries out methanol turn Change reaction and methylbenzene methanol shape selective alkylation reaction, reaction condition is as follows：Raw material is fed with micro feed pump, material benzenemethanol:First Benzene (molar ratio)=10:1, methanol and toluene total weight air speed 2h-1, 450 DEG C of reaction temperature, normal pressure.
Stream I I containing product leaves reaction system and enters piece-rate system, isolates C1~4Chain hydrocarbon, C5+Chain hydrocarbon and virtue Hydrocarbon.Wherein, C5+The fixed bed of chain hydrocarbon Returning reacting system lower part is contacted and is cracked with catalyst FXCAT-15, shape-selective virtue The reactions such as structure, 630 DEG C of the fixed bed reaction temperature of reaction system lower part.From C1~4Ethylene and propylene are isolated in chain hydrocarbon, as Low-carbon alkene product.Paraxylene is isolated from aromatic hydrocarbons, as product.Other components are as by-product.
Product is analyzed by online Agilent7890 gas-chromatographies, as shown in table 14.
Table 14
Methanol conversion (%) 100
Toluene conversion (%) 36.55
(C in chain hydrocarbon2H4+C3H6) selectivity 80.83
Paraxylene selectivity (wt%) in xylene isomer 99.70
Hydrocarbon product is distributed (wt%)
CH4 1.11
C2H4 33.02
C2H6 0.31
C3H6 27.25
C3H8 1.17
C4 11.7
Benzene 0.65
Ethylbenzene 0.39
Paraxylene 21.05
Meta-xylene 0.04
Ortho-xylene 0.02
C9+Aromatic hydrocarbons 3.29
The preparation and reaction of 19 fixed bed catalyst FXCAT-16 of embodiment
According to a kind of embodiment of the application, according to process flow chart shown in Fig. 6, using methanol toluene as raw material system Low-carbon alkene coproduction paraxylene.Stream I includes methanol and toluene.
First reaction zone is a fixed bed, and second reaction zone is a fixed bed.
The molded molecular sieve sample F XHZSM-5-A prepared in 5g (40-60 mesh) embodiment 1 is packed into the first reaction respectively The fixed bed in area and the fixed bed of second reaction zone, catalyst preparation process are identical：Catalyst in each fixed bed reactors It is handled 1 hour at 550 DEG C through 50mL/min nitrogen, 300 DEG C is then cooled under nitrogen atmosphere.Trimethoxy phosphorus, silicic acid four The mixed liquor of ethyl ester and toluene is fed with micro feed pump, trimethoxy phosphorus:Tetraethyl orthosilicate:Toluene (weight ratio)=5:20: 75, the total weight air speed 1h of trimethoxy phosphorus, tetraethyl orthosilicate and toluene-1, normal pressure.Charging stops charging, nitrogen after 90 minutes Purging, is warming up to 550 DEG C, is roasted 4 hours under air atmosphere.As procedure described above respectively in first fixed bed reaction area and Methanol toluene producing light olefins coproduction paraxylene fixed bed catalyst is made in two fixed bed reaction areas online, is denoted as FXCAT- 16。
The fixed bed that stream I enters the first reaction zone contacts with catalyst FXCAT-16 and carries out the reaction of methanol conversion and first Benzyl alcohol form selected methylation reacts, and reaction condition is as follows：Raw material is fed with micro feed pump, material benzenemethanol:Toluene (molar ratio) =10:1, methanol and toluene total weight air speed 2h-1, 450 DEG C of reaction temperature, normal pressure.Stream I I-A containing product leaves first The fixed bed of reaction zone simultaneously enters piece-rate system.Piece-rate system isolates C1~4Chain hydrocarbon, C5+Chain hydrocarbon and aromatic hydrocarbons.
The C isolated from piece-rate system5+Chain hydrocarbon enters the fixed bed of second reaction zone, is contacted simultaneously with catalyst FXCAT-16 It is cracked, the reactions such as shape-selective aromatisation, 630 DEG C of the fixed bed reaction temperature of second reaction zone, the stream I I-B containing product It leaves the fixed bed of second reaction zone and enters piece-rate system.
The C isolated from piece-rate system1~4Ethylene and propylene are isolated in chain hydrocarbon, as low-carbon alkene product.From aromatic hydrocarbons Paraxylene is isolated, as product.Other components are as by-product.
The hydrocarbon product of second reaction zone is analyzed by online Agilent7890 gas-chromatographies, as shown in Table 15；Button Except C5+Product distribution is as shown in table 16 after chain the hydrocarbon component.First reaction zone and second reaction zone hydrocarbon mixture product by Line Agilent7890 gas-chromatographies are analyzed, and C is deducted5+Product distribution is as shown in table 17 after chain the hydrocarbon component.
Table 15
Table 16
C5+Chain hydrocarbon conversion rate (%) 93.92
Paraxylene selectivity (wt%) in xylene isomer 99.70
Hydrocarbon product is distributed (wt%)
CH4 4.60
C2H4 22.18
C2H6 3.22
C3H6 24.88
C3H8 3.67
C4 9.06
Benzene 7.94
Toluene 11.79
Ethylbenzene 0.55
Paraxylene 10.60
Meta-xylene 0.03
Ortho-xylene 0.02
C9+Aromatic hydrocarbons 1.45
Table 17
Methanol conversion (%) 100
Toluene conversion (%) 37.11
(C in chain hydrocarbon2H4+C3H6) selectivity 80.81
Paraxylene selectivity (wt%) in xylene isomer 99.70
Hydrocarbon product is distributed (wt%)
CH4 1.18
C2H4 32.06
C2H6 0.31
C3H6 27.95
C3H8 1.17
C4 11.59
Benzene 0.65
Ethylbenzene 0.39
Paraxylene 21.35
Meta-xylene 0.04
Ortho-xylene 0.02
C9+Aromatic hydrocarbons 3.29
The preparation and reaction of 20 fluid catalyst FXCAT-17 of embodiment
According to a kind of embodiment of the application, flow chart is identical as embodiment 19, as shown in Figure 6.Difference lies in raw material, Reactor is different.
Stream I includes dimethyl ether, methanol and toluene in the present embodiment, using dimethyl ether, methanol and toluene as raw material low-carbon Alkene coproduction paraxylene.
The first reaction zone is a fluid bed, the sieve sample FLHZSM- in filling 1kg embodiments 4 in the present embodiment 5-C.Second reaction zone is a fluid bed, the sieve sample FLHZSM-5-C in the identical embodiments of filling 1kg 4.Catalysis Agent preparation process：Catalyst in each fluidized-bed reactor handles 1 hour through 10L/min nitrogen at 550 DEG C, then nitrogen 300 DEG C are cooled under atmosphere.Remaining identical as embodiment 19, obtained fixed bed catalyst is named as FLCAT-17.Reaction result with Embodiment 19 is consistent (deviation is no more than ± 1%).
The preparation of 21 fixed bed catalyst FXCAT-18 of embodiment and reaction evaluating
Prepare benzene online in miniature fixed-bed reactor, methanol alkylation preparing methylbenzene coproduction paraxylene fixed bed is urged After agent, reactivity worth evaluation is carried out.
It is as follows to prepare catalysts conditions online：5g (40-60 mesh) molded molecular sieve sample Fs XHZSM-5-C is packed into and is fixed Bed reactor, first handles 1 hour at 550 DEG C through 50mL/min air, 200 DEG C is then cooled under nitrogen atmosphere.Silicic acid four Ethyl ester is fed with micro feed pump, the weight space velocity 0.2h of tetraethyl orthosilicate-1, normal pressure.Charging stops charging, nitrogen after 1 hour Purging, is warming up to 550 DEG C, is roasted 4 hours under air atmosphere.Be warming up to 700 DEG C under nitrogen atmosphere, water with micro feed pump into Material, water weight space velocity 2h-1, normal pressure, stopping charging, is made benzene, methanol alkylation preparing methylbenzene coproduction paraxylene after charging 4 hours Fixed bed catalyst is named as FXCAT-18.Then, 450 DEG C of reaction temperature, test benzene, methanol alkane are cooled under nitrogen atmosphere Base preparing methylbenzene coproduction paraxylene reacts, and reaction condition is as follows：Raw material is fed with micro feed pump, benzene feedstock：Methanol (mole Than)=1:1, benzene and methanol total weight air speed 2h-1, normal pressure.Reaction product is divided by online Agilent7890 gas-chromatographies Analysis, sampling analysis when reacting 120min.Reaction result is as shown in table 18.
Table 18
Catalyst FXCAT-18
Reaction temperature (DEG C) 450
Methanol conversion (%) 100
Benzene conversion ratio (%) 35.93
Selectivity for paraxylene (wt%) in xylene products 99.63
C8Selectivity for paraxylene (wt%) in aromatic product 91.06
(toluene+paraxylene) selectivity (wt%) in aromatic product 94.16
Product is distributed (wt%)
C1-C6+Chain hydrocarbon 14.72
Toluene 53.09
Ethylbenzene 2.57
Paraxylene 27.21
Meta-xylene 0.06
Ortho-xylene 0.04
C9+Aromatic hydrocarbons 2.31
The preparation of 22 fixed bed catalyst FXCAT-19 of embodiment and reaction evaluating
Prepare benzene online in miniature fixed-bed reactor, methanol alkylation preparing methylbenzene coproduction paraxylene fixed bed is urged After agent, reactivity worth evaluation is carried out.
It is as follows to prepare catalysts conditions online：5g (40-60 mesh) molded molecular sieve sample Fs XHZSM-5-C is packed into and is fixed Bed reactor, first handles 1 hour at 550 DEG C through 50mL/min air, 200 DEG C is then cooled under nitrogen atmosphere.Silicic acid four Ethyl ester is fed with micro feed pump, the weight space velocity 0.1h of tetraethyl orthosilicate-1, normal pressure.Charging stops charging, nitrogen after 2 hours Purging, is warming up to 550 DEG C, is roasted 4 hours under air atmosphere.Be warming up to 700 DEG C under nitrogen atmosphere, water with micro feed pump into Material, water weight space velocity 2h-1, normal pressure, stopping charging, is made benzene, methanol alkylation preparing methylbenzene coproduction paraxylene after charging 4 hours Fixed bed catalyst is named as FXCAT-19.Then, 450 DEG C of reaction temperature, test benzene, methanol alkane are cooled under nitrogen atmosphere Base preparing methylbenzene coproduction paraxylene reacts, and reaction condition is as follows：Raw material is fed with micro feed pump, benzene feedstock:Methanol (mole Than)=1:1, benzene and methanol total weight air speed 2h-1, normal pressure.Reaction product is divided by online Agilent7890 gas-chromatographies Analysis, sampling analysis when reacting 120min.Reaction result is as shown in table 19.
Table 19
Catalyst FXCAT-19
Reaction temperature (DEG C) 450
Methanol conversion (%) 100
Benzene conversion ratio (%) 35.43
Selectivity for paraxylene (wt%) in xylene products 99.78
C8Selectivity for paraxylene (wt%) in aromatic product 91.33
(toluene+paraxylene) selectivity (wt%) in aromatic product 94.37
Product is distributed (wt%)
C1-C6+Chain hydrocarbon 14.81
Toluene 53.32
Ethylbenzene 2.51
Paraxylene 27.07
Meta-xylene 0.04
Ortho-xylene 0.02
C9+Aromatic hydrocarbons 2.23
The preparation of 23 fixed bed catalyst FXCAT-20 of embodiment and reaction evaluating
Prepare benzene online in miniature fixed-bed reactor, methanol alkylation preparing methylbenzene coproduction paraxylene fixed bed is urged After agent, reactivity worth evaluation is carried out.
It is as follows to prepare catalysts conditions online：5g (40-60 mesh) molded molecular sieve sample Fs XHZSM-5-C is packed into and is fixed Bed reactor, first handles 1 hour at 550 DEG C through 50mL/min air, 200 DEG C is then cooled under nitrogen atmosphere.Silicic acid four Ethyl ester is fed with micro feed pump, the weight space velocity 0.4h of tetraethyl orthosilicate-1, normal pressure.Charging stops charging, nitrogen after 0.5 hour Air-blowing is swept, and is warming up to 550 DEG C, is roasted 4 hours under air atmosphere.Be warming up to 700 DEG C under nitrogen atmosphere, water with micro feed pump into Material, water weight space velocity 2h-1, normal pressure, stopping charging, is made benzene, methanol alkylation preparing methylbenzene coproduction paraxylene after charging 4 hours Fixed bed catalyst is named as FXCAT-20.Then, 450 DEG C of reaction temperature, test benzene, methanol alkane are cooled under nitrogen atmosphere Base preparing methylbenzene coproduction paraxylene reacts, and reaction condition is as follows：Raw material is fed with micro feed pump, benzene feedstock:Methanol (mole Than)=1:1, benzene and methanol total weight air speed 2h-1, normal pressure.Reaction product is divided by online Agilent7890 gas-chromatographies Analysis, sampling analysis when reacting 120min.Reaction result is as shown in table 20.
Table 20
Catalyst FXCAT-20
Reaction temperature (DEG C) 450
Methanol conversion (%) 100
Benzene conversion ratio (%) 36.37
Selectivity for paraxylene (wt%) in xylene products 99.67
C8Selectivity for paraxylene (wt%) in aromatic product 90.95
(toluene+paraxylene) selectivity (wt%) in aromatic product 93.99
Product is distributed (wt%)
C1-C6+Chain hydrocarbon 14.61
Toluene 52.92
Ethylbenzene 2.63
Paraxylene 27.34
Meta-xylene 0.05
Ortho-xylene 0.04
C9+Aromatic hydrocarbons 2.41
The preparation of 24 fixed bed catalyst FXCAT-21 of embodiment and reaction evaluating
Prepare benzene online in miniature fixed-bed reactor, methanol alkylation preparing methylbenzene coproduction paraxylene fixed bed is urged After agent, reactivity worth evaluation is carried out.
It is as follows to prepare catalysts conditions online：5g (40-60 mesh) molded molecular sieve sample Fs XHZSM-5-C is packed into and is fixed Bed reactor, first handles 1 hour at 550 DEG C through 50mL/min air, 300 DEG C is then cooled under nitrogen atmosphere.Silicic acid four Ethyl ester is fed with micro feed pump, the weight space velocity 0.2h of tetraethyl orthosilicate-1, normal pressure.Charging stops charging, nitrogen after 1 hour Purging, is warming up to 550 DEG C, is roasted 4 hours under air atmosphere.Be warming up to 700 DEG C under nitrogen atmosphere, water with micro feed pump into Material, water weight space velocity 2h-1, normal pressure, stopping charging, is made benzene, methanol alkylation preparing methylbenzene coproduction paraxylene after charging 4 hours Fixed bed catalyst is named as FXCAT-21.Then, 450 DEG C of reaction temperature, test benzene, methanol alkane are cooled under nitrogen atmosphere Base preparing methylbenzene coproduction paraxylene reacts, and reaction condition is as follows：Raw material is fed with micro feed pump, benzene feedstock:Methanol (mole Than)=1:1, benzene and methanol total weight air speed 2h-1, normal pressure.Reaction product is divided by online Agilent7890 gas-chromatographies Analysis, sampling analysis when reacting 120min.Reaction result is as shown in table 21.
Table 21
Catalyst FXCAT-21
Reaction temperature (DEG C) 450
Methanol conversion (%) 100
Benzene conversion ratio (%) 35.37
Selectivity for paraxylene (wt%) in xylene products 99.70
C8Selectivity for paraxylene (wt%) in aromatic product 90.48
(toluene+paraxylene) selectivity (wt%) in aromatic product 93.09
Product is distributed (wt%)
C1-C6+Chain hydrocarbon 13.62
Toluene 53.41
Ethylbenzene 2.76
Paraxylene 26.99
Meta-xylene 0.04
Ortho-xylene 0.04
C9+Aromatic hydrocarbons 3.13
The preparation of 25 fixed bed catalyst FXCAT-22 of embodiment and reaction evaluating
Prepare benzene online in miniature fixed-bed reactor, methanol alkylation preparing methylbenzene coproduction paraxylene fixed bed is urged After agent, reactivity worth evaluation is carried out.
It is as follows to prepare catalysts conditions online：5g (40-60 mesh) molded molecular sieve sample Fs XHZSM-5-C is packed into and is fixed Bed reactor, first handles 1 hour at 550 DEG C through 50mL/min air, 450 DEG C is then cooled under nitrogen atmosphere.Silicic acid four Ethyl ester is fed with micro feed pump, the weight space velocity 0.2h of tetraethyl orthosilicate-1, normal pressure.Charging stops charging, nitrogen after 1 hour Purging, is warming up to 550 DEG C, is roasted 4 hours under air atmosphere.Be warming up to 700 DEG C under nitrogen atmosphere, water with micro feed pump into Material, water weight space velocity 2h-1, normal pressure, stopping charging, is made benzene, methanol alkylation preparing methylbenzene coproduction paraxylene after charging 4 hours Fixed bed catalyst is named as FXCAT-22.Then, 450 DEG C of reaction temperature, test benzene, methanol alkane are cooled under nitrogen atmosphere Base preparing methylbenzene coproduction paraxylene reacts, and reaction condition is as follows：Raw material is fed with micro feed pump, benzene feedstock:Methanol (mole Than)=1:1, benzene and methanol total weight air speed 2h-1, normal pressure.Reaction product is divided by online Agilent7890 gas-chromatographies Analysis, sampling analysis when reacting 120min.Reaction result is as shown in table 22.
Table 22
The preparation of 26 fixed bed catalyst FXCAT-23 of embodiment and reaction evaluating
Prepare benzene online in miniature fixed-bed reactor, methanol alkylation preparing methylbenzene coproduction paraxylene fixed bed is urged After agent, reactivity worth evaluation is carried out.
It is as follows to prepare catalysts conditions online：5g (40-60 mesh) molded molecular sieve sample Fs XHZSM-5-C is packed into and is fixed Bed reactor, first handles 1 hour at 550 DEG C through 50mL/min air, 300 DEG C is then cooled under nitrogen atmosphere.Silicic acid four Ethyl ester is fed with micro feed pump, the weight space velocity 0.2h of tetraethyl orthosilicate-1, normal pressure.Charging stops charging, nitrogen after 1 hour Purging, is warming up to 550 DEG C, is roasted 4 hours under air atmosphere.Be warming up to 800 DEG C under nitrogen atmosphere, water with micro feed pump into Material, water weight space velocity 2h-1, normal pressure, stopping charging, is made benzene, methanol alkylation preparing methylbenzene coproduction paraxylene after charging 2 hours Fixed bed catalyst is named as FXCAT-23.Then, 450 DEG C of reaction temperature, test benzene, methanol alkane are cooled under nitrogen atmosphere Base preparing methylbenzene coproduction paraxylene reacts, and reaction condition is as follows：Raw material is fed with micro feed pump, benzene feedstock:Methanol (mole Than)=1:1, benzene and methanol total weight air speed 2h-1, normal pressure.Reaction product is divided by online Agilent7890 gas-chromatographies Analysis, sampling analysis when reacting 120min.Reaction result is as shown in table 23.
Table 23
Catalyst FXCAT-23
Reaction temperature (DEG C) 450
Methanol conversion (%) 100
Benzene conversion ratio (%) 33.26
Selectivity for paraxylene (wt%) in xylene products 99.65
C8Selectivity for paraxylene (wt%) in aromatic product 91.19
(toluene+paraxylene) selectivity (wt%) in aromatic product 93.68
Product is distributed (wt%)
C1-C6+Chain hydrocarbon 14.57
Toluene 54.35
Ethylbenzene 2.39
Paraxylene 25.68
Meta-xylene 0.05
Ortho-xylene 0.04
C9+Aromatic hydrocarbons 2.92
The preparation of 27 fixed bed catalyst FXCAT-24 of embodiment and reaction evaluating
Prepare benzene online in miniature fixed-bed reactor, methanol alkylation preparing methylbenzene coproduction paraxylene fixed bed is urged After agent, reactivity worth evaluation is carried out.
It is as follows to prepare catalysts conditions online：5g (40-60 mesh) molded molecular sieve sample Fs XHZSM-5-C is packed into and is fixed Bed reactor, first handles 1 hour at 550 DEG C through 50mL/min air, 300 DEG C is then cooled under nitrogen atmosphere.Silicic acid four Ethyl ester is fed with micro feed pump, the weight space velocity 0.2h of tetraethyl orthosilicate-1, normal pressure.Charging stops charging, nitrogen after 1 hour Purging, is warming up to 550 DEG C, is roasted 4 hours under air atmosphere.Be warming up to 600 DEG C under nitrogen atmosphere, water with micro feed pump into Material, water weight space velocity 2h-1, normal pressure, stopping charging, is made benzene, methanol alkylation preparing methylbenzene coproduction paraxylene after charging 8 hours Fixed bed catalyst is named as FXCAT-24.Then, 450 DEG C of reaction temperature, test benzene, methanol alkane are cooled under nitrogen atmosphere Base preparing methylbenzene coproduction paraxylene reacts, and reaction condition is as follows：Raw material is fed with micro feed pump, benzene feedstock:Methanol (mole Than)=1:1, benzene and methanol total weight air speed 2h-1, normal pressure.Reaction product is divided by online Agilent7890 gas-chromatographies Analysis, sampling analysis when reacting 120min.Reaction result is as shown in table 24.
Table 24
Catalyst FXCAT-24
Reaction temperature (DEG C) 450
Methanol conversion (%) 100
Benzene conversion ratio (%) 36.97
Selectivity for paraxylene (wt%) in xylene products 99.70
C8Selectivity for paraxylene (wt%) in aromatic product 91.48
(toluene+paraxylene) selectivity (wt%) in aromatic product 93.42
Product is distributed (wt%)
C1-C6+Chain hydrocarbon 14.07
Toluene 53.96
Ethylbenzene 2.37
Paraxylene 26.31
Meta-xylene 0.05
Ortho-xylene 0.03
C9+Aromatic hydrocarbons 3.20
The preparation of 28 fixed bed catalyst FXCAT-25 of embodiment and reaction evaluating
Prepare benzene online in miniature fixed-bed reactor, methanol alkylation preparing methylbenzene coproduction paraxylene fixed bed is urged After agent, reactivity worth evaluation is carried out.
It is as follows to prepare catalysts conditions online：5g (40-60 mesh) molded molecular sieve sample Fs XHZSM-11-B is packed into and is fixed Bed reactor, first handles 1 hour at 550 DEG C through 50mL/min air, 200 DEG C is then cooled under nitrogen atmosphere.Silicic acid four Ethyl ester is fed with micro feed pump, the weight space velocity 0.2h of tetraethyl orthosilicate-1, normal pressure.Charging stops charging, nitrogen after 1 hour Purging, is warming up to 550 DEG C, is roasted 4 hours under air atmosphere.Be warming up to 700 DEG C under nitrogen atmosphere, water with micro feed pump into Material, water weight space velocity 2h-1, normal pressure, stopping charging, is made benzene, methanol alkylation preparing methylbenzene coproduction paraxylene after charging 4 hours Fixed bed catalyst is named as FXCAT-25.Then, 450 DEG C of reaction temperature, test benzene, methanol alkane are cooled under nitrogen atmosphere Base preparing methylbenzene coproduction paraxylene reacts, and reaction condition is as follows：Raw material is fed with micro feed pump, benzene feedstock:Methanol (mole Than)=1:1, benzene and methanol total weight air speed 2h-1, normal pressure.Reaction product is divided by online Agilent7890 gas-chromatographies Analysis, sampling analysis when reacting 120min.Reaction result is as shown in Table 25.
Table 25
Catalyst FXCAT-25
Reaction temperature (DEG C) 450
Methanol conversion (%) 100
Benzene conversion ratio (%) 35.56
Selectivity for paraxylene (wt%) in xylene products 99.82
C8Selectivity for paraxylene (wt%) in aromatic product 91.40
(toluene+paraxylene) selectivity (wt%) in aromatic product 94.39
Product is distributed (wt%)
C1-C6+Chain hydrocarbon 15.31
Toluene 52.72
Ethylbenzene 2.51
Paraxylene 27.22
Meta-xylene 0.03
Ortho-xylene 0.02
C9+Aromatic hydrocarbons 2.19
The preparation of 29 fixed bed catalyst FXCAT-26 of embodiment and reaction evaluating
Prepare benzene online in miniature fixed-bed reactor, methanol alkylation preparing methylbenzene coproduction paraxylene fixed bed is urged After agent, reactivity worth evaluation is carried out.
It is as follows to prepare catalysts conditions online：5g (40-60 mesh) molded molecular sieve sample Fs XHZSM-5-C is packed into and is fixed Bed reactor, first handles 1 hour at 550 DEG C through 50mL/min air, 150 DEG C is then cooled under nitrogen atmosphere.Silicic acid four Methyl esters is fed with micro feed pump, the weight space velocity 0.2h of quanmethyl silicate-1, normal pressure.Charging stops charging, nitrogen after 1 hour Purging, is warming up to 550 DEG C, is roasted 4 hours under air atmosphere.Be warming up to 700 DEG C under nitrogen atmosphere, water with micro feed pump into Material, water weight space velocity 2h-1, normal pressure, stopping charging, is made benzene, methanol alkylation preparing methylbenzene coproduction paraxylene after charging 4 hours Fixed bed catalyst is named as FXCAT-26.Then, 450 DEG C of reaction temperature, test benzene, methanol alkane are cooled under nitrogen atmosphere Base preparing methylbenzene coproduction paraxylene reacts, and reaction condition is as follows：Raw material is fed with micro feed pump, benzene feedstock:Methanol (mole Than)=1:1, benzene and methanol total weight air speed 2h-1, normal pressure.Reaction product is divided by online Agilent7890 gas-chromatographies Analysis, sampling analysis when reacting 120min.Reaction result is as shown in table 26.
Table 26
Catalyst FXCAT-26
Reaction temperature (DEG C) 450
Methanol conversion (%) 100
Benzene conversion ratio (%) 35.87
Selectivity for paraxylene (wt%) in xylene products 99.89
C8Selectivity for paraxylene (wt%) in aromatic product 91.38
(toluene+paraxylene) selectivity (wt%) in aromatic product 94.44
Product is distributed (wt%)
C1-C6+Chain hydrocarbon 15.11
Toluene 52.91
Ethylbenzene 2.54
Paraxylene 27.26
Meta-xylene 0.02
Ortho-xylene 0.01
C9+Aromatic hydrocarbons 2.15
The preparation of 30 fluid catalyst FLCAT-27 of embodiment and reaction evaluating
Benzene, methanol alkylation system are prepared online in fixed fluidized bed reaction unit to toluene coproduction paraxylene fluid bed Catalyst.
It is as follows to prepare catalysts conditions online：10g molded molecular sieve sample Fs LHZSM-5-C is packed into fixed fluidized bed anti- Device is answered, is first handled 1 hour at 550 DEG C through 50mL/min air, 200 DEG C is then cooled under nitrogen atmosphere.Tetraethyl orthosilicate It is fed with micro feed pump, the weight space velocity 0.2h of tetraethyl orthosilicate-1, normal pressure.Charging stops charging after 1 hour, nitrogen purges, 550 DEG C are warming up to, is roasted 4 hours under air atmosphere.700 DEG C are warming up under nitrogen atmosphere, water is fed with micro feed pump, water weight Measure air speed 2h-1, normal pressure, stopping charging, is made benzene, methanol alkylation preparing methylbenzene coproduction paraxylene fluid bed after charging 4 hours Catalyst is named as FLCAT-27.Then, 450 DEG C of reaction temperature, test benzene, methanol alkylation system are cooled under nitrogen atmosphere Toluene coproduction paraxylene reacts, and reaction condition is as follows：Raw material is fed with micro feed pump, benzene feedstock:Methanol (molar ratio)= 1:1, benzene and methanol total weight air speed 2h-1, normal pressure.Reaction product is analyzed by online Agilent7890 gas-chromatographies, instead Sampling analysis when answering 120min.Reaction result is as shown in table 27.
Table 27
The preparation of 31 fixed bed catalyst FXCAT-28 of embodiment and reaction evaluating
Prepare benzene, methanol preparing methylbenzene coproduction paraxylene fixed bed catalyst online in miniature fixed-bed reactor Afterwards, reactivity worth evaluation is carried out.
It is as follows to prepare catalysts conditions online：5g (40-60 mesh) molded molecular sieve sample Fs XHZSM-5-C is packed into and is fixed Bed reactor, first handles 1 hour at 550 DEG C through 50mL/min air, 200 DEG C is then cooled under nitrogen atmosphere.Silicic acid four Ethyl ester is fed with micro feed pump, the weight space velocity 0.2h of tetraethyl orthosilicate-1, normal pressure.Charging stops charging, nitrogen after 1 hour Purging, is warming up to 550 DEG C, is roasted 4 hours under air atmosphere, benzene is made, methanol alkylation preparing methylbenzene coproduction paraxylene is fixed Bed catalyst is named as FXCAT-28.Then, 450 DEG C of reaction temperature, test benzyl alcohol alkylation system are cooled under nitrogen atmosphere Toluene coproduction paraxylene reacts, and reaction condition is as follows：Raw material is fed with micro feed pump, benzene feedstock:Methanol (molar ratio)= 1:1, benzene and methanol total weight air speed 2h-1, normal pressure.Reaction product is analyzed by online Agilent7890 gas-chromatographies, instead Sampling analysis when answering 120min, reaction result are as shown in table 28.
Table 28
Catalyst FXCAT-28
Reaction temperature (DEG C) 450
Methanol conversion (%) 100
Benzene conversion ratio (%) 38.01
Selectivity for paraxylene (wt%) in xylene products 93.60
C8Selectivity for paraxylene (wt%) in aromatic product 80.64
(toluene+paraxylene) selectivity (wt%) in aromatic product 82.91
Product is distributed (wt%)
C1-C6+Chain hydrocarbon 14.06
Toluene 44.92
Ethylbenzene 4.52
Paraxylene 26.33
Meta-xylene 0.99
Ortho-xylene 0.81
C9+Aromatic hydrocarbons 8.37
The preparation of 32 fixed bed catalyst FXCAT-29 of embodiment and reaction evaluating
Benzene, methanol preparing methylbenzene coproduction paraxylene and low-carbon alkene is prepared online in miniature fixed-bed reactor to fix After bed catalyst, reactivity worth evaluation is carried out.
It is as follows to prepare catalysts conditions online：5g (40-60 mesh) molded molecular sieve sample Fs XHZSM-5-A is packed into and is fixed Bed reactor, first handles 1 hour at 550 DEG C through 50mL/min air, 200 DEG C is then cooled under nitrogen atmosphere.Trimethoxy The mixed liquor of base phosphine and tetraethyl orthosilicate is fed with micro feed pump, tetraethyl orthosilicate：Trimethoxy phosphine (mass ratio)=2, three The total weight air speed 0.1h of methoxyl group phosphine and tetraethyl orthosilicate-1, normal pressure.Charging stops charging after 1 hour, heat up under air atmosphere To 550 DEG C, roast 4 hours.700 DEG C are warming up under nitrogen atmosphere, water is fed with micro feed pump, water weight space velocity 2h-1, often Pressure, charging stop charging after 4 hours, and benzene, methanol preparing methylbenzene coproduction paraxylene and low-carbon alkene fixed bed catalyst, life is made Entitled FXCAT-29.Then, 450 DEG C of reaction temperature, test benzene, methanol preparing methylbenzene coproduction paraxylene are cooled under nitrogen atmosphere It is reacted with low-carbon alkene, reaction condition is as follows：Raw material is fed with micro feed pump, benzene feedstock：Methanol (molar ratio)=1:1, benzene With methanol total weight air speed 2h-1, normal pressure.Reaction product is analyzed by online Agilent7890 gas-chromatographies, reaction Sampling analysis when 120min.Reaction result is as shown in table 29.
Table 29
The preparation of 33 fixed bed catalyst FXCAT-30 of embodiment and reaction evaluating
Benzene, methanol preparing methylbenzene coproduction paraxylene and low-carbon alkene is prepared online in miniature fixed-bed reactor to fix After bed catalyst, reactivity worth evaluation is carried out.
It is as follows to prepare catalysts conditions online：5g (40-60 mesh) molded molecular sieve sample Fs XHZSM-5-A is packed into and is fixed Bed reactor, first handles 1 hour at 550 DEG C through 50mL/min air, 200 DEG C is then cooled under nitrogen atmosphere.Trimethoxy The mixed liquor of base phosphine and tetraethyl orthosilicate is fed with micro feed pump, tetraethyl orthosilicate：Trimethoxy phosphine (mass ratio)=4, three The total weight air speed 0.1h of methoxyl group phosphine and tetraethyl orthosilicate-1, normal pressure.Charging stops charging after 1.5 hours, risen under air atmosphere Temperature roasts 4 hours to 550 DEG C.700 DEG C are warming up under nitrogen atmosphere, water is fed with micro feed pump, water weight space velocity 2h-1, often Pressure, charging stop charging after 4 hours, and benzene, methanol preparing methylbenzene coproduction paraxylene low-carbon alkene fixed bed catalyst, name is made For FXCAT-30.Then, be cooled to 450 DEG C of reaction temperature under nitrogen atmosphere, test benzene, methanol preparing methylbenzene coproduction paraxylene and Low-carbon alkene reacts, and reaction condition is as follows：Raw material is fed with micro feed pump, benzene feedstock：Methanol (molar ratio)=1:1, benzene and Methanol total weight air speed 2h-1, normal pressure.Reaction product is analyzed by online Agilent7890 gas-chromatographies, reacts 120min When sampling analysis.Reaction result is as shown in table 30.
Table 30
The preparation of 34 fixed bed catalyst FXCAT-31 of embodiment and reaction evaluating
Benzene, methanol preparing methylbenzene coproduction paraxylene and low-carbon alkene is prepared online in miniature fixed-bed reactor to fix After bed catalyst, reactivity worth evaluation is carried out.
It is as follows to prepare catalysts conditions online：5g (40-60 mesh) molded molecular sieve sample Fs XHZSM-5-A is packed into and is fixed Bed reactor, first handles 1 hour at 550 DEG C through 50mL/min air, 200 DEG C is then cooled under nitrogen atmosphere.Trimethoxy The mixed liquor of base phosphine and tetraethyl orthosilicate is fed with micro feed pump, tetraethyl orthosilicate：Trimethoxy phosphine (mass ratio)=1, three The total weight air speed 0.1h of methoxyl group phosphine and tetraethyl orthosilicate-1, normal pressure.Charging stops charging after 1.5 hours, risen under air atmosphere Temperature roasts 4 hours to 550 DEG C.700 DEG C are warming up under nitrogen atmosphere, water is fed with micro feed pump, water weight space velocity 2h-1, often Pressure, charging stop charging after 4 hours, and benzene, methanol preparing methylbenzene coproduction paraxylene and low-carbon alkene fixed bed catalyst, life is made Entitled FXCAT-31.Then, 450 DEG C of reaction temperature, test benzene, methanol preparing methylbenzene coproduction paraxylene are cooled under nitrogen atmosphere It is reacted with low-carbon alkene, reaction condition is as follows：Raw material is fed with micro feed pump, benzene feedstock：Methanol (molar ratio)=1:1, benzene With methanol total weight air speed 2h-1, normal pressure.Reaction product is analyzed by online Agilent7890 gas-chromatographies, reaction Sampling analysis when 120min.Reaction result is as shown in table 31.
Table 31
Catalyst FXCAT-31
Reaction temperature (DEG C) 450
Methanol conversion (%) 100
Benzene conversion ratio (%) 33.68
Selectivity for paraxylene (wt%) in xylene products 99.71
C8Selectivity for paraxylene (wt%) in aromatic product 94.72
(toluene+paraxylene) selectivity (wt%) in aromatic product 95.35
Product is distributed (wt%)
C1-C6+Chain hydrocarbon 17.64
Toluene 51.46
Ethylbenzene 1.43
Paraxylene 27.07
Meta-xylene 0.04
Ortho-xylene 0.04
C9+Aromatic hydrocarbons 2.32
Chain hydrocarbon product distribution (wt%)
CH4 0.91
C2H4 38.18
C2H6 0.11
C3H6 34
C3H8 1.75
C4 12.97
C5 6.82
C6+ 5.26
C2H4+C3H6 72.18
The preparation of 35 fixed bed catalyst FXCAT-32 of embodiment and reaction evaluating
Benzene, methanol preparing methylbenzene coproduction paraxylene and low-carbon alkene is prepared online in miniature fixed-bed reactor to fix After bed catalyst, reactivity worth evaluation is carried out.
It is as follows to prepare catalysts conditions online：5g (40-60 mesh) molded molecular sieve sample Fs XHZSM-5-A is packed into and is fixed Bed reactor, first handles 1 hour at 550 DEG C through 50mL/min air, 250 DEG C is then cooled under nitrogen atmosphere.Trimethoxy The mixed liquor of base phosphine and tetraethyl orthosilicate is fed with micro feed pump, tetraethyl orthosilicate：Trimethoxy phosphine (mass ratio)=2, three The total weight air speed 0.1h of methoxyl group phosphine and tetraethyl orthosilicate-1, normal pressure.Charging stops charging after 1 hour, heat up under air atmosphere To 550 DEG C, roast 4 hours.700 DEG C are warming up under nitrogen atmosphere, water is fed with micro feed pump, water weight space velocity 2h-1, often Pressure, charging stop charging after 4 hours, and benzene, methanol preparing methylbenzene coproduction paraxylene and low-carbon alkene fixed bed catalyst, life is made Entitled FXCAT-32.Then, 450 DEG C of reaction temperature, test benzene, methanol preparing methylbenzene coproduction paraxylene are cooled under nitrogen atmosphere It is reacted with low-carbon alkene, reaction condition is as follows：Raw material is fed with micro feed pump, benzene feedstock:Methanol (molar ratio)=1:1, benzene With methanol total weight air speed 2h-1, normal pressure.Reaction product is analyzed by online Agilent7890 gas-chromatographies, reaction Sampling analysis when 120min.Reaction result is as shown in table 32.
Table 32
Catalyst FXCAT-32
Reaction temperature (DEG C) 450
Methanol conversion (%) 100
Benzene conversion ratio (%) 35.32
Selectivity for paraxylene (wt%) in xylene products 99.82
C8Selectivity for paraxylene (wt%) in aromatic product 94.60
(toluene+paraxylene) selectivity (wt%) in aromatic product 95.39
Product is distributed (wt%)
C1-C6+Chain hydrocarbon 17.15
Toluene 52.05
Ethylbenzene 1.49
Paraxylene 26.98
Meta-xylene 0.03
Ortho-xylene 0.02
C9+Aromatic hydrocarbons 2.28
Chain hydrocarbon product distribution (wt%)
CH4 0.97
C2H4 37.92
C2H6 0.1
C3H6 33.95
C3H8 1.83
C4 13.07
C5 6.93
C6+ 5.23
C2H4+C3H6 71.87
The preparation of 36 fixed bed catalyst FXCAT-33 of embodiment and reaction evaluating
Benzene, methanol preparing methylbenzene coproduction paraxylene and low-carbon alkene is prepared online in miniature fixed-bed reactor to fix After bed catalyst, reactivity worth evaluation is carried out.
It is as follows to prepare catalysts conditions online：5g (40-60 mesh) molded molecular sieve sample Fs XHZSM-5-A is packed into and is fixed Bed reactor, first handles 1 hour at 550 DEG C through 50mL/min air, 300 DEG C is then cooled under nitrogen atmosphere.Trimethoxy The mixed liquor of base phosphine and tetraethyl orthosilicate is fed with micro feed pump, tetraethyl orthosilicate：Trimethoxy phosphine (mass ratio)=2, three The total weight air speed 0.1h of methoxyl group phosphine and tetraethyl orthosilicate-1, normal pressure.Charging stops charging after 1 hour, heat up under air atmosphere To 550 DEG C, roast 4 hours.700 DEG C are warming up under nitrogen atmosphere, water is fed with micro feed pump, water weight space velocity 2h-1, often Pressure, charging stop charging after 4 hours, and benzene, methanol preparing methylbenzene coproduction paraxylene and low-carbon alkene fixed bed catalyst, life is made Entitled FXCAT-33.Then, 450 DEG C of reaction temperature, test benzene, methanol preparing methylbenzene coproduction paraxylene are cooled under nitrogen atmosphere It is reacted with low-carbon alkene, reaction condition is as follows：Raw material is fed with micro feed pump, benzene feedstock：Methanol (molar ratio)=1:1, benzene With methanol total weight air speed 2h-1, normal pressure.Reaction product is analyzed by online Agilent7890 gas-chromatographies, reaction Sampling analysis when 120min.Reaction result is as described in table 33.
Table 33
Catalyst FXCAT-33
Reaction temperature (DEG C) 450
Methanol conversion (%) 100
Benzene conversion ratio (%) 35.95
Selectivity for paraxylene (wt%) in xylene products 99.63
C8Selectivity for paraxylene (wt%) in aromatic product 93.09
(toluene+paraxylene) selectivity (wt%) in aromatic product 94.18
Product is distributed (wt%)
C1-C6+Chain hydrocarbon 16.39
Toluene 51.94
Ethylbenzene 1.89
Paraxylene 26.80
Meta-xylene 0.06
Ortho-xylene 0.04
C9+Aromatic hydrocarbons 2.88
Chain hydrocarbon product distribution (wt%)
CH4 0.95
C2H4 36.92
C2H6 0.18
C3H6 33.39
C3H8 2.22
C4 13.57
C5 6.95
C6+ 5.82
C2H4+C3H6 70.31
The preparation of 37 fixed bed catalyst FXCAT-34 of embodiment and reaction evaluating
Benzene, methanol preparing methylbenzene coproduction paraxylene and low-carbon alkene is prepared online in miniature fixed-bed reactor to fix After bed catalyst, reactivity worth evaluation is carried out.
It is as follows to prepare catalysts conditions online：5g (40-60 mesh) molded molecular sieve sample Fs XHZSM-5-A is packed into and is fixed Bed reactor, first handles 1 hour at 550 DEG C through 50mL/min air, 200 DEG C is then cooled under nitrogen atmosphere.Trimethoxy The mixed liquor of base phosphine and tetraethyl orthosilicate is fed with micro feed pump, tetraethyl orthosilicate：Trimethoxy phosphine (mass ratio)=2, three The total weight air speed 0.1h of methoxyl group phosphine and tetraethyl orthosilicate-1, normal pressure.Charging stops charging after 1 hour, heat up under air atmosphere To 550 DEG C, roast 4 hours.800 DEG C are warming up under nitrogen atmosphere, water is fed with micro feed pump, water weight space velocity 2h-1, often Pressure, charging stop charging after 2 hours, and benzene, methanol preparing methylbenzene coproduction paraxylene and low-carbon alkene fixed bed catalyst, life is made Entitled FXCAT-34.Then, 450 DEG C of reaction temperature, test benzene, methanol preparing methylbenzene coproduction paraxylene are cooled under nitrogen atmosphere It is reacted with low-carbon alkene, reaction condition is as follows：Raw material is fed with micro feed pump, benzene feedstock：Methanol (molar ratio)=1:1, benzene With methanol total weight air speed 2h-1, normal pressure.Reaction product is analyzed by online Agilent7890 gas-chromatographies, reaction Sampling analysis when 120min.Reaction result is as described in table 34.
Table 34
The preparation of 38 fixed bed catalyst FXCAT-35 of embodiment and reaction evaluating
Benzene, methanol preparing methylbenzene coproduction paraxylene and low-carbon alkene is prepared online in miniature fixed-bed reactor to fix After bed catalyst, reactivity worth evaluation is carried out.
It is as follows to prepare catalysts conditions online：5g (40-60 mesh) molded molecular sieve sample Fs XHZSM-5-A is packed into and is fixed Bed reactor, first handles 1 hour at 550 DEG C through 50mL/min air, 200 DEG C is then cooled under nitrogen atmosphere.Trimethoxy The mixed liquor of base phosphine and tetraethyl orthosilicate is fed with micro feed pump, tetraethyl orthosilicate：Trimethoxy phosphine (mass ratio)=2, three The total weight air speed 0.1h of methoxyl group phosphine and tetraethyl orthosilicate-1, normal pressure.Charging stops charging after 1 hour, heat up under air atmosphere To 550 DEG C, roast 4 hours.600 DEG C are warming up under nitrogen atmosphere, water is fed with micro feed pump, water weight space velocity 2h-1, often Pressure, charging stop charging after 8 hours, and benzene, methanol preparing methylbenzene coproduction paraxylene and low-carbon alkene fixed bed catalyst, life is made Entitled FXCAT-35.Then, 450 DEG C of reaction temperature, test benzene, methanol preparing methylbenzene coproduction paraxylene are cooled under nitrogen atmosphere It is reacted with low-carbon alkene, reaction condition is as follows：Raw material is fed with micro feed pump, benzene feedstock：Methanol (molar ratio)=1:1, benzene With methanol total weight air speed 2h-1, normal pressure.Reaction product is analyzed by online Agilent7890 gas-chromatographies, reaction Sampling analysis when 120min.Reaction result is as described in table 35.
Table 35
The preparation of 39 fixed bed catalyst FXCAT-36 of embodiment and reaction evaluating
Benzene, methanol preparing methylbenzene coproduction paraxylene and low-carbon alkene is prepared online in miniature fixed-bed reactor to fix After bed catalyst, reactivity worth evaluation is carried out.
It is as follows to prepare catalysts conditions online：By 5g (40-60 mesh) molded molecular sieve sample F XHZSM-11-A catalyst pressures Sheetmolding and crushing and screening are 40-60 mesh, and 5g (40-60 mesh) catalyst is packed into fixed bed reactors, first through 50mL/min skies Gas is handled 1 hour at 550 DEG C, and 200 DEG C are then cooled under nitrogen atmosphere.The mixed liquor of trimethoxy phosphine and tetraethyl orthosilicate It is fed with micro feed pump, tetraethyl orthosilicate：Trimethoxy phosphine (mass ratio)=2, trimethoxy phosphine and tetraethyl orthosilicate it is total Weight space velocity 0.1h-1, normal pressure.Charging stops charging after 1 hour, 550 DEG C are warming up under air atmosphere, roasts 4 hours.Nitrogen gas 700 DEG C are warming up under atmosphere, water is fed with micro feed pump, water weight space velocity 2h-1, normal pressure, stopping charging, system after charging 4 hours Benzene, methanol preparing methylbenzene coproduction paraxylene and low-carbon alkene fixed bed catalyst are obtained, FXCAT-36 is named as.Then, nitrogen gas 450 DEG C of reaction temperature, test benzene, methanol preparing methylbenzene coproduction paraxylene and low-carbon alkene reaction, reaction condition are cooled under atmosphere It is as follows：Raw material is fed with micro feed pump, benzene feedstock:Methanol (molar ratio)=1:1, benzene and methanol total weight air speed 2h-1, often Pressure.Reaction product is analyzed by online Agilent7890 gas-chromatographies, sampling analysis when reacting 120min.Reaction result As described in table 36.
Table 36
Catalyst FXCAT-36
Reaction temperature (DEG C) 450
Methanol conversion (%) 100
Benzene conversion ratio (%) 34.17
Selectivity for paraxylene (wt%) in xylene products 99.85
C8Selectivity for paraxylene (wt%) in aromatic product 94.49
(toluene+paraxylene) selectivity (wt%) in aromatic product 95.46
Product is distributed (wt%)
C1-C6+Chain hydrocarbon 18.13
Toluene 51.89
Ethylbenzene 1.49
Paraxylene 26.26
Meta-xylene 0.03
Ortho-xylene 0.01
C9+Aromatic hydrocarbons 2.19
Chain hydrocarbon product distribution (wt%)
CH4 0.91
C2H4 38.61
C2H6 0.09
C3H6 34.07
C3H8 1.6
C4 12.23
C5 6.85
C6+ 5.64
C2H4+C3H6 72.68
The preparation of 40 fixed bed catalyst FXCAT-37 of embodiment and reaction evaluating
Benzene, methanol preparing methylbenzene coproduction paraxylene and low-carbon alkene is prepared online in miniature fixed-bed reactor to fix After bed catalyst, reactivity worth evaluation is carried out.
It is as follows to prepare catalysts conditions online：5g (40-60 mesh) molded molecular sieve sample Fs XHZSM-5-A is packed into and is fixed Bed reactor, first handles 1 hour at 550 DEG C through 50mL/min air, 200 DEG C is then cooled under nitrogen atmosphere.Trimethoxy The mixed liquor of base phosphine and quanmethyl silicate is fed with micro feed pump, quanmethyl silicate：Trimethoxy phosphine (mass ratio)=2, three The total weight air speed 0.1h of methoxyl group phosphine and quanmethyl silicate-1, normal pressure.Charging stops charging after 1 hour, heat up under air atmosphere To 550 DEG C, roast 4 hours.700 DEG C are warming up under nitrogen atmosphere, water is fed with micro feed pump, water weight space velocity 2h-1, often Pressure, charging stop charging after 4 hours, and benzene, methanol preparing methylbenzene coproduction paraxylene and low-carbon alkene fixed bed catalyst, life is made Entitled FXCAT-37.Then, 450 DEG C of reaction temperature, test benzene, methanol preparing methylbenzene coproduction paraxylene are cooled under nitrogen atmosphere It is reacted with low-carbon alkene, reaction condition is as follows：Raw material is fed with micro feed pump, benzene feedstock:Methanol (molar ratio)=1:1, benzene With methanol total weight air speed 2h-1, normal pressure.Reaction product is analyzed by online Agilent7890 gas-chromatographies, reaction Sampling analysis when 120min.Reaction result is as described in table 37.
Table 37
Catalyst FXCAT-37
Reaction temperature (DEG C) 450
Methanol conversion (%) 100
Benzene conversion ratio (%) 33.86
Selectivity for paraxylene (wt%) in xylene products 99.85
C8Selectivity for paraxylene (wt%) in aromatic product 94.59
(toluene+paraxylene) selectivity (wt%) in aromatic product 95.51
Product is distributed (wt%)
C1-C6+Chain hydrocarbon 18.67
Toluene 51.46
Ethylbenzene 1.46
Paraxylene 26.22
Meta-xylene 0.02
Ortho-xylene 0.02
C9+Aromatic hydrocarbons 2.15
Chain hydrocarbon product distribution (wt%)
CH4 1.05
C2H4 37.59
C2H6 0.1
C3H6 34.03
C3H8 1.69
C4 13.02
C5 6.77
C6+ 5.75
C2H4+C3H6 71.62
The preparation of 41 fluid catalyst FLCAT-38 of embodiment and reaction evaluating
Prepare benzene, methanol preparing methylbenzene coproduction paraxylene and low-carbon alkene fluidisation online in fixed fluidized bed reaction unit Bed catalyst.
It is as follows to prepare catalysts conditions online：10g molded molecular sieve sample Fs LHZSM-5-A is packed into fixed fluidized bed anti- Device is answered, is first handled 1 hour at 550 DEG C through 50mL/min air, 200 DEG C is then cooled under nitrogen atmosphere.Trimethoxy phosphine It is fed with the micro feed pump of mixed liquor of tetraethyl orthosilicate, tetraethyl orthosilicate：Trimethoxy phosphine (mass ratio)=2, trimethoxy The total weight air speed 0.1h of base phosphine and tetraethyl orthosilicate-1, normal pressure.Charging stops charging after 1 hour, be warming up under air atmosphere It 550 DEG C, roasts 4 hours.700 DEG C are warming up under nitrogen atmosphere, water is fed with micro feed pump, water weight space velocity 2h-1, normal pressure, Charging stops charging after 4 hours, and benzene, methanol preparing methylbenzene coproduction paraxylene and low-carbon alkene fluid catalyst, name is made For FLCAT-38.Then, 450 DEG C of reaction temperature, test benzene, methanol alkylation preparing methylbenzene coproduction pair two are cooled under nitrogen atmosphere Toluene and low-carbon alkene reaction, reaction condition are as follows：Raw material is fed with micro feed pump, benzene feedstock：Methanol (molar ratio)=1: 1, benzene and methanol total weight air speed 2h-1, normal pressure.Reaction product is analyzed by online Agilent7890 gas-chromatographies, reaction Sampling analysis when 120min.Reaction result is as described in table 38.
Table 38
The preparation of 42 fixed bed catalyst FXCAT-39 of embodiment and reaction evaluating
Benzene, methanol preparing methylbenzene coproduction paraxylene and low-carbon alkene is prepared online in miniature fixed-bed reactor to fix After bed catalyst, reactivity worth evaluation is carried out.
It is as follows to prepare catalysts conditions online：5g (40-60 mesh) molded molecular sieve sample Fs XHZSM-5-A is packed into and is fixed Bed reactor, first handles 1 hour at 550 DEG C through 50mL/min air, 200 DEG C is then cooled under nitrogen atmosphere.Trimethoxy The mixed liquor of base phosphine and tetraethyl orthosilicate is fed with micro feed pump, tetraethyl orthosilicate：Trimethoxy phosphine (mass ratio)=2, three The total weight air speed 0.1h of methoxyl group phosphine and tetraethyl orthosilicate-1, normal pressure.Charging stops charging, nitrogen purging, heating after 1 hour It to 550 DEG C, is roasted 4 hours under air atmosphere, benzene, methanol preparing methylbenzene coproduction paraxylene and low-carbon alkene fixed-bed catalytic is made Agent is named as FXCAT-39.Then, 450 DEG C of reaction temperature, test benzene, methanol preparing methylbenzene coproduction pair are cooled under nitrogen atmosphere Dimethylbenzene and low-carbon alkene reaction, reaction condition are as follows：Raw material is fed with micro feed pump, benzene feedstock：Methanol (molar ratio)= 1:1, benzene and methanol total weight air speed 2h-1, normal pressure.Reaction product is analyzed by online Agilent7890 gas-chromatographies, instead Sampling analysis when answering 120min.Reaction result is as described in table 39.
Table 39
The preparation of 43 fixed bed catalyst FXCAT-40 of embodiment and reaction evaluating
Benzene, methanol preparing methylbenzene coproduction paraxylene and low-carbon alkene is prepared online in miniature fixed-bed reactor to fix After bed catalyst, reactivity worth evaluation is carried out.
It is as follows to prepare catalysts conditions online：5g (40-60 mesh) molded molecular sieve sample Fs XHZSM-5-A is packed into and is fixed Bed reactor, first handles 1 hour at 550 DEG C through 50mL/min air, 200 DEG C is then cooled under nitrogen atmosphere.Silicic acid four Ethyl ester is fed with micro feed pump, the weight space velocity 0.067h of tetraethyl orthosilicate-1, normal pressure.Charging stops charging, nitrogen after 1 hour Air-blowing is swept, and is warming up to 550 DEG C, is roasted 4 hours under air atmosphere.Be warming up to 700 DEG C under nitrogen atmosphere, water with micro feed pump into Material, water weight space velocity 2h-1, normal pressure, stopping charging, is made benzene, methanol preparing methylbenzene coproduction paraxylene and low-carbon after charging 4 hours Alkene fixed bed catalyst, is named as FXCAT-40.Then, 450 DEG C of reaction temperature, test benzene, first are cooled under nitrogen atmosphere Alcohol preparing methylbenzene coproduction paraxylene and low-carbon alkene reaction, reaction condition are as follows：Raw material is fed with micro feed pump, benzene feedstock: Methanol (molar ratio)=1:1, benzene and methanol total weight air speed 2h-1, normal pressure.Reaction product passes through online Agilent7890 gas phases Chromatography is analyzed, sampling analysis when reacting 120min.Reaction result is as described in table 40.
Table 40
Catalyst FXCAT-40
Reaction temperature (DEG C) 450
Methanol conversion (%) 100
Benzene conversion ratio (%) 35.93
Selectivity for paraxylene (wt%) in xylene products 99.49
C8Selectivity for paraxylene (wt%) in aromatic product 90.93
(toluene+paraxylene) selectivity (wt%) in aromatic product 94.11
Product is distributed (wt%)
C1-C6+Chain hydrocarbon 14.72
Toluene 53.09
Ethylbenzene 2.57
Paraxylene 27.17
Meta-xylene 0.09
Ortho-xylene 0.05
C9+Aromatic hydrocarbons 2.31
Chain hydrocarbon product distribution (wt%)
CH4 1.31
C2H4 11.73
C2H6 0.98
C3H6 20.65
C3H8 11.31
C4 29.13
C5 14.86
C6+ 10.03
C2H4+C3H6 32.38
The preparation of 44 fixed bed catalyst FXCAT-41 of embodiment and reaction evaluating
Device, operation and condition only prepare in catalyst process trimethoxy phosphorus replacing with methyl two with embodiment 5 Ethyoxyl phosphorus, other are constant, and methanol toluene producing light olefins coproduction paraxylene fixed bed catalyst is made, is named as FXCAT- 41.In the same manner as in Example 5, reaction result and embodiment 5 are consistent (deviation is no more than ± 1%) for reaction evaluating condition.
The above is only several embodiments of the application, not does any type of limitation to the application, although this Shen Please disclosed as above with preferred embodiment, however not to limit the application, any person skilled in the art is not taking off In the range of technical scheme, makes a little variation using the technology contents of the disclosure above or modification is equal to Case study on implementation is imitated, is belonged in technical proposal scope.

Claims (10)

1. the in-situ preparation method of a kind of benzene, methanol alkylation preparing methylbenzene coproduction paraxylene catalyst, which is characterized in that by silicon Alkylators, vapor are contacted with the molecular sieve in reactor, and the benzene, methanol alkylation preparing methylbenzene coproduction pair two is prepared in situ Toluene catalytically agent；
The reactor is the reactor of benzene, methanol alkylation preparing methylbenzene coproduction paraxylene.
2. according to the method described in claim 1, it is characterized in that, the silylating reagent, which is selected from, has chemical formula shown in Formulas I At least one of compound：
R1, R2, R3, R4Independently selected from C1~C10Alkyl, C1~C10Alkoxy；
Preferably, R in the Formulas I1, R2, R3, R4In at least one be selected from C1~C10Alkoxy；
Preferably, the silylating reagent is in quanmethyl silicate, tetraethyl orthosilicate, silicic acid orthocarbonate, tetrabutyl silicate It is at least one.
3. according to the method described in claim 1, it is characterized in that, the reactor is anti-selected from fixed bed, fluid bed, moving bed Answer at least one of device.
4. method according to claim 1 or 3, which is characterized in that the molecular sieve is after being molded according to type of reactor Molded molecular sieve；
The molded molecular sieve is made of molecular sieve；Or
Contain molecular sieve and binder in the molded molecular sieve.
5. according to the method described in claim 4, it is characterized in that, the molded molecular sieve by the broken molding of molecular sieve tabletting, Broken strip molding after molecular sieve is mixed extrusion with binder, by a kind of side in molecular sieve and binder mixed atomizing drying and moulding Method is prepared.
6. according to the method described in claim 1, it is characterized in that, the molecular sieve is selected from the molecule with MFI skeleton structures Sieve, at least one of the molecular sieve with MEL skeleton structures；
Preferably, the molecular sieve is HZSM-5 molecular sieves and/or HZSM-11 molecular sieves.
7. according to the method described in claim 4, it is characterized in that, including at least following steps：
(1) molded molecular sieve is placed in reactor；
(2) the material D containing silylating reagent is passed through into reactor；
(3) stop being passed through material D into reactor, temperature of reactor is risen to 500 DEG C or more and is passed through air roasting；
(4) be passed through non-active gas purging after, temperature of reactor is risen to 550 DEG C or more, be passed through the material E containing vapor into To get to the catalyst of the benzene, methanol alkylation preparing methylbenzene coproduction paraxylene after row steam treatment.
8. the method according to the description of claim 7 is characterized in that in the step (2) material D contain silylating reagent and Benzene；
Preferably, under the conditions of step (2) is 130 DEG C~500 DEG C, the material D containing silylating reagent is passed through into reactor；
Preferably, the weight space velocity of step (2) material D is 0.1h-1~1h-1, the time for being passed through material D is 0.1~5 hour；
Preferably, the weight space velocity of step (2) material D is 0.2h-1~0.4h-1, the time for being passed through material D is 0.5~2 hour；
Preferably, calcination temperature is 500 DEG C~700 DEG C in step (3), and roasting time is 1~6 hour；
Preferably, non-active gas described in step (4) is selected from least one of nitrogen, helium, argon gas；
Preferably, the temperature of steam treatment is 550 DEG C~800 DEG C in step (4), and processing time is 1~10 hour.
9. a kind of method of benzene, methanol alkylation preparing methylbenzene coproduction paraxylene, which is characterized in that by the original containing methanol and benzene Material in the reactor with the benzene, the methanol alkylation preparing methylbenzene that are prepared in situ according to any one of claim 1 to 8 the method The catalyst of coproduction paraxylene contacts, and prepares toluene coproduction paraxylene.
10. according to the method described in claim 9, it is characterized in that, the benzene, methanol alkylation preparing methylbenzene coproduction paraxylene Reaction temperature be 350 DEG C~600 DEG C；
Preferably, the benzene, methanol alkylation preparing methylbenzene coproduction paraxylene reaction temperature be 400 DEG C~500 DEG C；
Preferably, in the raw material containing methanol and benzene, the molar ratio of methanol and benzene is methanol：Benzene=0.5~2:1.
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