WO2013091335A1 - 甲醇和/或二甲醚制取乙烯丙烯的催化剂、其制法及应用 - Google Patents

甲醇和/或二甲醚制取乙烯丙烯的催化剂、其制法及应用 Download PDF

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WO2013091335A1
WO2013091335A1 PCT/CN2012/074518 CN2012074518W WO2013091335A1 WO 2013091335 A1 WO2013091335 A1 WO 2013091335A1 CN 2012074518 W CN2012074518 W CN 2012074518W WO 2013091335 A1 WO2013091335 A1 WO 2013091335A1
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catalyst
dimethyl ether
propylene
molecular sieve
ethylene
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PCT/CN2012/074518
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English (en)
French (fr)
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许磊
刘中民
朱书魁
于政锡
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中国科学院大连化学物理研究所
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Priority to US14/366,156 priority Critical patent/US9844770B2/en
Priority to EP12860001.2A priority patent/EP2796197B1/en
Priority to SG11201402785RA priority patent/SG11201402785RA/en
Priority to KR1020147016534A priority patent/KR101622496B1/ko
Priority to AU2012357510A priority patent/AU2012357510B2/en
Priority to JP2014547673A priority patent/JP5881856B2/ja
Priority to EA201391185A priority patent/EA024895B1/ru
Publication of WO2013091335A1 publication Critical patent/WO2013091335A1/zh
Priority to ZA2014/05035A priority patent/ZA201405035B/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J29/00Catalysts comprising molecular sieves
    • B01J29/04Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/40Crystalline 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
    • B01J29/405Crystalline 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 containing rare earth elements, titanium, zirconium, hafnium, zinc, cadmium, mercury, gallium, indium, thallium, tin or lead
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C1/00Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon
    • C07C1/20Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as heteroatoms
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C1/00Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon
    • C07C1/20Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as heteroatoms
    • C07C1/22Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as heteroatoms by reduction
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2229/00Aspects of molecular sieve catalysts not covered by B01J29/00
    • B01J2229/10After treatment, characterised by the effect to be obtained
    • B01J2229/18After treatment, characterised by the effect to be obtained to introduce other elements into or onto the molecular sieve itself
    • B01J2229/186After treatment, characterised by the effect to be obtained to introduce other elements into or onto the molecular sieve itself not in framework positions
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2229/00Aspects of molecular sieve catalysts not covered by B01J29/00
    • B01J2229/30After treatment, characterised by the means used
    • B01J2229/32Reaction with silicon compounds, e.g. TEOS, siliconfluoride
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2523/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00
    • C07C2523/10Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of rare earths
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2529/00Catalysts comprising molecular sieves
    • C07C2529/04Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites, pillared clays
    • C07C2529/06Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2529/00Catalysts comprising molecular sieves
    • C07C2529/04Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites, pillared clays
    • C07C2529/06Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • C07C2529/40Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/50Improvements relating to the production of bulk chemicals
    • Y02P20/52Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P30/00Technologies relating to oil refining and petrochemical industry
    • Y02P30/20Technologies relating to oil refining and petrochemical industry using bio-feedstock
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P30/00Technologies relating to oil refining and petrochemical industry
    • Y02P30/40Ethylene production

Definitions

  • the present invention relates to a process for preparing a light olefin from methanol and/or dimethyl ether, and in particular to a catalyst for converting ethylene and/or dimethyl ether to ethylene propylene, a preparation method of the catalyst, and a use thereof
  • Ethylene and propylene are the basic raw materials for modernization.
  • ethylene and propylene are mainly produced from light oil (naphtha and light diesel oil) obtained from petroleum refining, and are completely dependent on petroleum resources.
  • light oil naphtha and light diesel oil
  • olefins With the development of social economy, the demand for olefins is increasing.
  • MTO low-carbon olefins
  • the properties are greater than 90 wt%, thereby increasing the yield and feedstock utilization of methanol and/or dimethyl ether to ethylene and propylene.
  • the inventors of the present invention have developed a molecular sieve catalyst modified by a combination of hydrazine and silanization.
  • the hydrazine modification can effectively modulate the acidity and hydrothermal stability of the zeolite molecular sieve, and the silanization technique can be external to the zeolite molecular sieve.
  • the present invention provides a catalyst for the conversion of methanol and/or dimethyl ether to produce ethylene and propylene, the catalyst being: a cerium and a silanization combined modified molecular sieve catalyst, wherein the molecular sieve catalyst
  • the molecular sieve is HZSM-5 and/or HZSM-11 zeolite molecular sieve, wherein the catalyst is supported by hydrazine and silanization to support the catalyst and the silicon compound, wherein the supported amount of rhodium is 0.5-5 weight of the total weight of the catalyst.
  • the silicon compound is supported in an amount of from 0.1 to 10% by weight based on the total weight of the catalyst, and the balance is HZSM-5 and/or HZSM-11 zeolite molecular sieve.
  • the supported amount of ruthenium is 1 to 5% by weight based on the total weight of the catalyst, and the supported amount of the silicon compound on the basis of the silica is 1 to 10% by weight based on the total weight of the catalyst, and
  • the amount is HZSM-5 and/or HZSM-11 zeolite molecular sieve.
  • the invention provides a process for the preparation of a catalyst as described above, the process comprising the steps of: immersing HZSM-5 and/or HZSM-11 zeolite molecular sieves in a solution of cerium nitrate for 1-12 hours , filtering, drying and calcining to obtain a cerium-modified molecular sieve; and immersing the obtained cerium-modified molecular sieve in a silicon source 1-12 Hour, filtration, drying and calcination to obtain a cerium and silanization combined modified molecular sieve catalyst, wherein the silicon source is selected from the group consisting of tetramethyl silicate, tetraethyl silicate and tetraethyl silicon. Kind or more.
  • the source of silicon is tetraethyl silicate.
  • the present invention provides a process for producing ethylene and propylene from methanol and/or dimethyl ether, the method comprising the steps of:
  • step (3) (4) separating the highly selective ethylene and propylene-containing hydrocarbon obtained in the step (3) into a second dC 5 component and a C 6 or higher component comprising a high selectivity ethylene and propylene, wherein the C 6 or higher component Recycling according to step (3), and separating the second dC 5 component as the target product;
  • step (3) the second C 6 component separated by the step (4) is mixed with methanol and/or dimethyl ether to obtain a mixture, wherein The C 6 or higher component is recycled and reacted with a methanol and/or dimethyl ether mixed feed to continuously obtain a second dC 5 product containing highly selective ethylene and propylene.
  • reaction temperature is from 400 to 600 ° C
  • pressure is from 0 to 2.0 MPa
  • methanol and/or dimethyl ether feed weight space velocity is from 0.2 to 10! !
  • the catalyst is: a molecular sieve catalyst modified by hydrazine and silanization, wherein the molecular sieve in the molecular sieve catalyst is a molecular sieve of HZSM-5 and/or HZSM-11 zeolite, wherein the catalyst is supported by a combination of hydrazine and silanization.
  • the supported ruthenium and the silicon compound are modified to have a surface acidity, wherein the supported amount of ruthenium is 0.5 to 5% by weight based on the total weight of the catalyst, and the supported amount of the silicon compound on the basis of the silica is 0.1 to 10% by weight based on the total weight of the catalyst, and the balance It is a molecular sieve of HZSM-5 and/or HZSM-11 zeolite.
  • the inventors of the present invention have also studied to develop a preparation method of the above catalyst, wherein the zeolite molecular sieve used is HZSM-5 and HZSM-11 zeolite molecular sieves, the preparation steps are as follows: First, the molecular sieve is immersed in a cerium nitrate solution for 1-12 hours, filtered, dried at 100-120 ° C and calcined in an air atmosphere at 450-650 ° C to obtain tampering.
  • the obtained cerium-modified molecular sieve is a silicon source of one or more selected from the group consisting of tetramethyl silicate, tetraethyl silicate and tetraethyl silicon, preferably tetraethyl silicate
  • the ester is immersed for 1-12 hours, filtered, dried at 100-120 ° C and calcined in an air atmosphere at 450-650 ° C to obtain a ruthenium and silanization combined modified molecular sieve catalyst.
  • the inventors of the present invention have also developed a new process for the conversion of methanol and/or dimethyl ether to produce ethylene and propylene.
  • a catalyst to form a hydrocarbon
  • the mixed material is contacted with the catalyst to form a hydrocarbon having a new composition
  • the obtained hydrocarbon having a new composition is separated from the component DC 5 and the component C 6 or higher, C 6 or more
  • the components are recycled, and the dC 5 component is separated as a product; the conversion of the components above C 6 and the reaction with the methanol and/or dimethyl ether mixed feed promotes the conversion of methanol and/or dimethyl ether to ethylene and propylene, thereby The dC 5 product containing highly selective ethylene and propylene was continuously obtained.
  • the catalyst used in the present invention wherein the supported amount of ruthenium is 0.5 to 5%, preferably 1 to 5%, based on the total mass of the catalyst, and the supported amount of the silylated modified silica is 0.1 to 10% of the total mass of the catalyst. , preferably from 1 to 10%.
  • reaction material is methanol or dimethyl ether and a mixture of the two, wherein the methanol may be aqueous methanol, and the methanol concentration is 50-100%.
  • methanol may be aqueous methanol, and the methanol concentration is 50-100%.
  • the method for converting methanol/dimethyl ether to produce ethylene and propylene according to the present invention is characterized in that the reaction mode is any one of a fixed bed and a moving bed, and is also applicable to a fluidized bed.
  • the reaction condition is: the reaction temperature is 350-650 ° C, preferably 400-600 ° C; the reaction pressure is 0-5.0 MPa, compared Good for 0-2.0 MPa; methanol / dimethyl ether feed weight airspeed is 0.1-20! ⁇ , preferably 0.2-10! ! — 1 .
  • the pressure described in this application refers to gauge pressure.
  • the methanol/dimethyl ether of the present invention is used to convert ethylene and propylene catalysts and application methods, and finally a dC 5 product containing highly selective ethylene and propylene is obtained, wherein ethylene and propylene have a selectivity of more than 90 wt% in the dC 5 product.
  • HZSM-5 zeolite molecular sieve prepared in the step 1), immersed in tetraethyl orthosilicate (TEOS) at room temperature for 12 hours, and after pouring the upper liquid, the impregnated HZSM-5 zeolite molecular sieve solid 120 Drying at °C and calcination in air at 550 °C for 6 hours to obtain a HZSM-5 catalyst modified by hydrazine and silanization.
  • TEOS tetraethyl orthosilicate
  • HZSM-5 zeolite molecular sieve prepared in the step 1), immersed in tetraethyl orthosilicate (TEOS) at room temperature for 24 hours, and after pouring the upper liquid, the impregnated HZSM-5 zeolite molecular sieve solid 120 Drying at °C and calcination in air at 550 °C for 6 hours to obtain a HZSM-5 catalyst modified by hydrazine and silanization.
  • TEOS tetraethyl orthosilicate
  • step 2) Take 50 g of yttrium-modified HZSM-11 zeolite molecular sieve prepared in step 1) in tetraethyl orthosilicate (TEOS) After immersing at room temperature for 24 hours, the upper layer liquid is decanted, and the impregnated HZSM-5 zeolite molecular sieve solid is dried at 120 ° C and calcined in air at 550 ° C for 6 hours to obtain a HZSM-11 catalyst modified by hydrazine and silanization. Named MATO-3.
  • TEOS tetraethyl orthosilicate
  • the ruthenium-1, MATO-2 and MATO-3 catalysts prepared in Examples 1, 2, and P 3 were used as reaction catalysts, and were tableted and crushed into sieves of 40-60 mesh. 10 g of the catalyst was charged into the reactor, treated in an air atmosphere at 550 ° C for 1 hour, and purged under a nitrogen atmosphere for 0.5 hour. The methanol was pumped into the reactor through a feed pump and the catalyst was contacted at a temperature of 550 ° C, and the reaction pressure was 0 MPa. The raw material methanol feed weight is 2 h" 1 , and the reaction product is analyzed by gas chromatography on-line. The total product composition, dC 5 composition and C 6 composition are shown in Tables 1, 2 and 3.
  • the total product composition is dC.
  • the components of 5 were 84.26 wt%, 85.63 wt% and 85.89 wt%, respectively, and the components above C 6 were 15.74 wt%, 14.37 wt% and 14.11 wt%, respectively, wherein the selectivity of ethylene and propylene in the dC 5 component was 56.19, respectively. % by weight, 53.52% by weight and 55.23% by weight.
  • the ruthenium-1, MATO-2 and MATO-3 catalysts prepared in Examples 1, 2, and P 3 were used as reaction catalysts, and were tableted and crushed into sieves of 40-60 mesh. 10 g of the catalyst was charged into the reactor, treated in an air atmosphere at 550 ° C for 1 hour, and cooled in a nitrogen atmosphere to a reaction temperature of 450 ° C.
  • Aromatic hydrocarbon solution of methanol proportions embodiment with reference to Table 3 Example C 6 + methanol conversion reaction product composition benzene, toluene, xylene, mesitylene, and durene MATO-2 3 in aromatic hydrocarbon solution of the catalyst preparation, the formulated (by CH 2 meter;)
  • the catalyst is contacted with the catalyst by a metering pump at a mass ratio of 1:1.
  • the reaction pressure is 0 MPa
  • the methanol feed weight airspeed is 1! ⁇
  • the reaction product was analyzed by gas chromatography on-line, and the total product composition, dC 5 composition and C 6 or higher component composition are shown in Tables 4, 5 and 6.
  • the dC 5 components in the total product composition were 52.15% by weight, 53.24% by weight, and 53.76% by weight, respectively, and the components above C 6 were 47.85% by weight, 46.76% by weight, and 46.24% by weight, respectively, wherein ethylene and propylene were contained in the dC 5 component.
  • the selectivity was 90.43 wt%, 90.45 wt%, and 90.11 wt%, respectively.
  • the ruthenium-1, MATO-2 and MATO-3 catalysts prepared in Examples 1, 2, and P 3 were used as reaction catalysts, and were tableted and crushed into sieves of 40-60 mesh. 10 g of the catalyst was charged into the reactor, treated in an air atmosphere at 550 ° C for 1 hour, and cooled in a nitrogen atmosphere to a reaction temperature of 500 ° C.
  • Proportions of Example 4 in Table methanol conversion reaction product is the C 6 + composition as benzene, toluene, xylene, mesitylene, and durene 6 in MATO-2
  • Preparation of Catalyst A solution of an aromatic hydrocarbon, an aromatic hydrocarbon solution of the formulated methanol (Press CH 2 meter) Inductive reaction with the catalyst by pumping the reactor into the reactor at a mass ratio of 1:1.
  • the reaction system pressure back pressure valve was adjusted to 0.5 MPa, the methanol feed WHSV of 4 h "1
  • the reaction product was analyzed online by gas chromatography, total product composition, the above constituents dC 5 6 composition as shown in Table 7 and C , 8 and 9.
  • the dC 5 components in the total product composition were 50.32% by weight, 51.86% by weight, and 51.21% by weight, respectively, and the components above C 6 were 49.68% by weight, 48.14% by weight, and 48.79% by weight, respectively, of CC.
  • the ethylene and propylene selectivity in the 5 components was 90.95 wt%, 91.22 wt%, and 91.45% by weight, respectively.
  • the ruthenium-1, MATO-2 and MATO-3 catalysts prepared in Examples 1, 2, and P 3 were used as reaction catalysts, and were tableted and crushed into sieves of 40-60 mesh. 10 g of the catalyst was charged into the reactor, treated in an air atmosphere at 550 ° C for 1 hour, and cooled in a nitrogen atmosphere to a reaction temperature of 500 ° C.
  • Proportions of Example 4 in Table methanol conversion reaction product is the C 6 + composition as benzene, toluene, xylene, mesitylene, and durene 6 in MATO-2
  • Preparation of Catalyst A solution of an aromatic hydrocarbon, an aromatic hydrocarbon solution of the formulated with dimethyl ether ( According to the CH 2 meter, the reaction rate of the dimethyl ether feed is 3 IT 1 according to the mass ratio of 0.5:1, and the reaction speed of the reaction system is adjusted to 1.0 MPa by the back pressure valve.
  • the product was analyzed by gas chromatography on-line, and the total product composition, dC 5 composition and C 6 or higher component composition are shown in Tables 10, 11 and 12.
  • the dC 5 components in the total product composition were 67.46 wt%, 68.57 wt% and 68.83% by weight, respectively, and the components above C 6 were 32.54 wt%, 31.43 wt% and 31.17 wt%, respectively, wherein ethylene and propylene were in the dC 5 component.
  • the selectivity was 90.76 wt%, 91.03% wt%, and 90.90 wt%, respectively.

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  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
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Abstract

提供了一种甲醇和/或二甲醚制取乙烯和丙烯的催化剂,所述催化剂是采用镧和硅垸化联合改性的中孔分子筛催化剂,将其用于甲醇和/或二甲醚制取乙烯和丙烯的步骤包括:首先甲醇和/或二甲醚进料与催化剂接触反应生成碳氢化合物,将该碳氢化合物分离为C1-C5组分和C6以上组分,然后将C6以上组分返回反应器进料口与甲醇和/或二甲醚混合进料,并按此循环操作,其中乙烯和丙烯在分离获得的C1-C5组分中选择性可达到90重量%以上,实现甲醇和/或二甲醚转化制取乙烯和丙烯的最大收率。

Description

甲醇和 /或二甲醚制取乙烯丙烯的催化剂、 其制法及应用 技术领域
本发明涉及一种由甲醇和 /或二甲醚制取低碳烯烃的技术, 具体地涉及一种甲醇和 /或二甲醚转化制取乙烯丙烯的催化剂、所述催化剂的制备方法以及使用所述催化剂并 采用物料循环技术由甲醇和 /或二甲醚高选择性制备乙烯和丙烯的方法。 背景技术
乙烯、 丙烯是现代化工的基本原料, 工业上乙烯和丙烯主要是以石油炼制而得的 轻质油 (石脑油和轻柴油) 为原料进行生产, 完全依赖于石油资源。 随着社会经济的 发展, 烯烃需求日益增大, 研究开发烯烃生产新技术一直是重要的研究方向, 其中煤 经甲醇制取低碳烯烃 (MTO) 是最具有应用前景的非石油路线生产乙烯、 丙烯的新途 径。 几十年来, 世界各国均投入了大量人力和物力对此路线进行研究开发。
1976年 Mobil Oil公司首先进行了甲醇在 ZSM-5分子筛催化剂上转化为碳氢化合 物的反应。 其后, USP 4,035,430中公开了甲醇在 ZSM-5分子筛催化剂上转化汽油的 过程; USP 4,542,252中公开了甲醇在 ZSM-5分子筛催化剂上制取低碳烯烃的技术; USP 3,911,041, USP 4,049,573, USP 4,100,219, JP 60-126233, JP 61-97231, JP 62-70324 和 EP 6501中公开了使用磷、镁、硅或碱金属元素改性的 ZSM-5分子筛催化剂由甲醇 制取低碳烯烃的反应;且本申请人在 USP 5,367,100中公开了使用磷和镧改性的 ZSM-5 分子筛催化剂由甲醇或二甲醚制取低碳烯烃的反应, 其气相产物中乙烯和丙烯总选择 性仅为 65重量%左右, 乙烯、 丙烯和丁烯总选择性大于 85重量%。
1984年, 美国联合碳化物公司 (UCC) 开发了新型磷酸硅铝系列分子筛 (SAPO-n) (USP 4440871) , 其中 SAPO-34分子筛由于具有适宜的酸性和孔道结构在 MTO反应中 呈现出优异的催化性能, 并成为取代 ZSM-5沸石分子筛的新一代 MTO催化剂的活性组 分。由于 SAPO-34孔道较小且具有椭球形笼状结构,在甲醇转化反应中容易结炭失活, 因此采用 SAPO-34分子筛为活性组分的 MTO催化剂需要制备成微球流化催化剂并应用 于流化反应过程, 流化反应对催化剂的频繁再生和磨损不可避免地会造成催化剂的损 失, 从而增加 MTO过程的生产成本。
为了克服甲醇制烯烃流化床技术的弊端, 发展抗结炭催化剂和催化剂磨损小的固 定床技术仍是该技术的重要发展方向。 从上述现有技术得知, 在 ZSM-5沸石分子筛为 活性组分的催化剂上, 造成产物中乙烯和丙烯选择性较低的主要原因之一是甲醇转化 中产生大量芳烃产物。 所以, 提高产物中乙烯和丙烯选择性的路线为: (1) 将生成的 芳烃进一步转化为烯烃; 或 (2)将生成的芳烃循环使用促进烯烃的生成, 并抑制芳烃产 物的生成。 发明内容
本发明的目的在于提供一种用于甲醇和 /或二甲醚转化制备乙烯和丙烯的催化剂 及其制备方法、 以及使用所述催化剂制备乙烯和丙烯的方法, 其烃类产物中乙烯和丙 烯选择性大于 90 wt %, 从而提高甲醇和 /或二甲醚转化为乙烯和丙烯的收率和原料利 用率。
为了实现上述目的, 本发明的发明人研究开发了镧和硅烷化联合改性的分子筛催 化剂, 镧改性可以有效调变沸石分子筛的酸性和水热稳定性, 而硅烷化技术可以对沸 石分子筛外表面酸性进行"钝化"修饰, 改性后的催化剂用于甲醇和 /或二甲醚转化制备 乙烯和丙烯反应可以降低产物中烷烃的生成, 提高乙烯和丙烯的选择性; 而且本发明 的发明人研究了通过循环技术将生成的芳烃与甲醇和 /或二甲醚共同进料促进甲醇和 / 或二甲醚转化为烯烃并抑制芳烃产物的生成而提高乙烯和丙烯的选择性。在此基础上, 完成了本发明。
因此, 在一方面, 本发明提供一种用于甲醇和 /或二甲醚转化制取乙烯和丙烯的催 化剂, 所述催化剂是: 镧和硅烷化联合改性的分子筛催化剂, 其中所述分子筛催化剂 中的分子筛为 HZSM-5和 /或 HZSM-11沸石分子筛, 其中通过镧和硅烷化联合改性, 使得催化剂担载镧和硅化合物, 其中镧的担载量为催化剂总重量的 0.5-5重量%, 硅化 合物以氧化硅计的担载量为催化剂总重量的 0.1-10重量%, 并且余量为 HZSM-5 和 / 或 HZSM-11沸石分子筛。
在本发明的一个优选的实施方案中, 镧的担载量为催化剂总重量的 1-5 重量%, 硅化合物以氧化硅计的担载量为催化剂总重量的 1-10重量%, 并且余量为 HZSM-5和 /或 HZSM-11沸石分子筛。
在另一方面, 本发明提供一种用于制备上面所述的催化剂的方法, 所述方法包括 以下步骤: 将 HZSM-5和 /或 HZSM-11沸石分子筛在硝酸镧溶液中浸渍 1-12小时, 过 滤、烘干并焙烧,得到镧改性的分子筛;和将得到的镧改性的分子筛在硅源中浸渍 1-12 小时, 过滤、 烘干并焙烧, 得到镧和硅烷化联合改性的分子筛催化剂, 其中所述硅源 选自由硅酸四甲酯、 硅酸四乙酯和四乙基硅组成的组中的一种或多种。
在本发明的另一个优选的实施方案中, 硅源为硅酸四乙酯。
在又另一方面, 本发明提供一种用于由甲醇和 /或二甲醚制取乙烯和丙烯的方法, 所述方法包括以下步骤:
(1) 使甲醇和 /或二甲醚与上面所述的催化剂接触, 反应生成碳氢化合物;
(2) 将步骤 (1)所述的碳氢化合物分离成第一 d-C5组分和 C6以上组分, 其中第一 C C5组分做为副产物分出;
(3) 将步骤 (2)分离得到的 C6以上组分返回进料口与甲醇和 /或二甲醚混合得到混 合物料, 使所述混合物料与上面所述的催化剂接触, C6以上组分促进甲醇和 /或二甲醚 高选择性转化为乙烯和丙烯, 反应生成含高选择性乙烯和丙烯的碳氢化合物;
(4) 将步骤 (3)得到的含高选择性乙烯和丙烯的碳氢化合物分离成包含高选择性乙 烯和丙烯的第二 d-C5组分和 C6以上组分, 其中 C6以上组分按步骤 (3)循环使用, 并 且第二 d-C5组分作为目的产物分出; 和
(5) 重复步骤 (3)和 (4), 但在步骤 (3)中使用步骤 (4)分离得到的第二 C6以上组分与 甲醇和 /或二甲醚混合得到混合物料, 其中通过 C6以上组分的循环并与甲醇和 /或二甲 醚混合进料反应, 连续获得含有高选择性乙烯和丙烯的第二 d-C5产物。
在本发明的另一个优选的实施方案中, 其中反应温度为 400-600°C, 压力为 0-2.0 MPa, 并且甲醇和 /或二甲醚进料重量空速为 0.2-10!!
在本发明的另一个优选的实施方案中, 其中所述方法在固定床、 移动床或流化床 反应器中进行。 具体实施方式
为了实现上述目的, 本发明的发明人研究开发了甲醇和 /或二甲醚转化制备乙烯、 丙烯的催化剂。 所述催化剂是: 镧和硅烷化联合改性的分子筛催化剂, 其中所述分子 筛催化剂中的分子筛为 HZSM-5和 /或 HZSM-11沸石分子筛, 其中通过镧和硅烷化联 合改性, 使得催化剂担载镧和硅化合物修饰表面酸性, 其中镧的担载量为催化剂总重 量的 0.5-5重量%, 硅化合物以氧化硅计的担载量为催化剂总重量的 0.1-10重量%, 并 且余量为 HZSM-5和 /或 HZSM-11沸石分子筛。
本发明的发明人还研究开发上述催化剂的制备方法, 其中使用的沸石分子筛为 HZSM-5和 HZSM-11沸石分子筛, 制备步骤为: 首先分子筛在硝酸镧溶液中浸渍 1-12 小时, 过滤、 100-120°C烘干并在 450-650°C空气气氛中焙烧得到镧改性的分子筛; 将 得到的镧改性的分子筛在选自硅酸四甲酯、 硅酸四乙酯和四乙基硅组成的组中的一种 或多种的硅源,优选硅酸四乙酯中浸渍 1-12小时,过滤、 100-120°C烘干并在 450-650°C 空气气氛中焙烧得到镧和硅烷化联合改性的分子筛催化剂。
本发明的发明人还研究开发了甲醇和 /或二甲醚转化制取乙烯和丙烯的新工艺。包 括:甲醇和 /或二甲醚单独与催化剂接触反应生成的碳氢化合物,将碳氢化合物按 d-C5 组分和 C6以上组分分离;将分离得到的 C6以上组分循环与甲醇和 /或二甲醚混合进料, 混合物料与催化剂接触反应生成具有新组成的碳氢化合物; 将得到的具有新组成的碳 氢化合物按 d-C5组分和 C6以上组分分离, C6以上组分循环使用, d-C5组分作为产 物分出; 通过 C6以上组分的循环并与甲醇和 /或二甲醚混合进料反应促进甲醇和 /或二 甲醚转化为乙烯和丙烯, 从而连续获得含有高选择性乙烯和丙烯的 d-C5产物。
本发明使用的催化剂, 其中镧的担载量为催化剂总质量的 0.5-5 %, 优选 1-5 %, 并且所述硅烷化改性氧化硅的担载量为催化剂总质量的 0.1-10%, 优选为 1-10%。
本发明所述的方法, 其中, 反应物料为甲醇或二甲醚以及二者的混合物, 其中甲 醇可以为含水甲醇, 甲醇质量浓度为 50-100%。 将汽化后甲醇或二甲醚通入反应器中 与催化剂接触反应。
本发明所述甲醇 /二甲醚转化制取乙烯和丙烯的应用方法, 其特征在于反应方式为 固定床和移动床的任一种形式, 同时也适用于流化床。
本发明所述甲醇 /二甲醚转化制取乙烯和丙烯的应用方法, 反应条件为: 反应温度 为 350-650°C, 较佳为 400-600°C ; 反应压力为 0-5.0 MPa, 较佳为 0-2.0 MPa; 甲醇 / 二甲醚进料重量空速为 0.1-20!^, 较佳为 0.2-10!!—1
本申请中所述的压力是指表压。
本发明所述甲醇 /二甲醚转化制取乙烯和丙烯催化剂及应用方法,最终获得含有高 选择性乙烯和丙烯的 d-C5产物,其中乙烯和丙烯在 d-C5产物中选择性大于 90 wt %。 实施例
下面通过实施例详述本发明, 但本发明不局限于以下实施例。
除非另外指出, 本申请中的份数、 百分比和含量都按质量计。 实施例 1 : 催化剂制备
1) 称取 100g HZSM-5 沸石分子筛原粉 (南开大学催化剂厂, Si02/Al203摩尔比 =50),按 3重量% La担载量配制硝酸镧溶液,将称取的 HZSM-5沸石分子筛在硝酸镧 溶液中浸渍过夜, 然后将上层余液倾出, 将浸渍后的 HZSM-5沸石分子筛固体 120°C 烘干后, 在 550°C下空气中焙烧 3小时, 得到镧改性的 HZSM-5沸石分子筛。
2) 取步骤 1) 制备的镧改性 HZSM-5沸石分子筛 50g, 在正硅酸乙酯 (TEOS) 中 常温浸渍 12小时,倾出上层液体后,将浸渍后的 HZSM-5沸石分子筛固体 120°C烘干、 550°C空气中焙烧 6 小时得到镧和硅烷化联合改性的 HZSM-5催化剂, 催化剂命名为 MATO
3) 将镧和硅烷化联合改性的 HZSM-5催化剂进行元素分析,其中镧的担载量为催 化剂总质量的 2.8 %, 硅烷化以氧化硅计的担载量为催化剂总质量的 4.8%。 实施例 2: 催化剂制备
1) 称取 100g HZSM-5 沸石分子筛原粉 (南开大学催化剂厂, Si02/Al203摩尔比 =50),按 5重量% La担载量配制硝酸镧溶液,将称取的 HZSM-5沸石分子筛在硝酸镧 溶液中浸渍过夜, 然后将上层余液倾出, 将浸渍后的 HZSM-5沸石分子筛固体 120°C 烘干后, 在 550°C下空气中焙烧 3小时, 得到镧改性的 HZSM-5沸石分子筛。
2) 取步骤 1) 制备的镧改性 HZSM-5沸石分子筛 50g, 在正硅酸乙酯 (TEOS) 中 常温浸渍 24小时,倾出上层液体后,将浸渍后的 HZSM-5沸石分子筛固体 120°C烘干、 550°C空气中焙烧 6 小时得到镧和硅烷化联合改性的 HZSM-5催化剂, 催化剂命名为 MATO
3) 将镧和硅烷化联合改性的 HZSM-5催化剂进行元素分析,其中镧的担载量为催 化剂总质量的 4.6 %, 硅烷化以氧化硅计的担载量为催化剂总质量的 6.9 %。 实施例 3 : 催化剂制备
1) 称取 100g HZSM-11沸石分子筛原粉 (南开大学催化剂厂, Si02/Al203摩尔比 =61), 按 5重量% La担载量配制硝酸镧溶液, 将称取的 HZSM-11沸石分子筛在硝酸 镧溶液中浸渍过夜,然后将上层余液倾出,将浸渍后的 HZSM-5沸石分子筛固体 120°C 烘干后, 在 550°C下空气中焙烧 3小时, 得到镧改性的 HZSM-11沸石分子筛。
2) 取步骤 1) 制备的镧改性 HZSM-11沸石分子筛 50g,在正硅酸乙酯 (TEOS) 中 常温浸渍 24小时,倾出上层液体后,将浸渍后的 HZSM-5沸石分子筛固体 120°C烘干、 550°C空气中焙烧 6 小时得到镧和硅烷化联合改性的 HZSM-11催化剂,催化剂命名为 MATO-3。
3) 将镧和硅烷化联合改性的 HZSM-11催化剂进行元素分析, 其中镧的担载量为 催化剂总质量的 4.8 %, 硅烷化以氧化硅计的担载量为催化剂总质量的 7.3%。 参考实施例: 反应评价
以实施例 1、 2、 禾 P 3中制备的 ΜΑΤΟ-1、 MATO-2和 MATO-3催化剂作为反应催 化剂, 压片成型并破碎筛分为 40-60 目。 分别将 10g催化剂装入反应器中, 在 550°C 空气气氛中处理 1小时, 在氮气气氛下吹扫 0.5小时。 通过进料泵将甲醇泵入反应器 与催化剂在 550°C温度下接触反应,反应压力 0 MPa。原料甲醇进料重量空速为 2 h"1 , 反应产物采用气相色谱在线分析,总产物组成、 d-C5组成和 C6以上组分组成如表 1、 2和 3所示。总产物组成中 d-C5组分分别为 84.26重量%、85.63重量%和 85.89重量%, C6以上组分分别为 15.74重量%、 14.37重量%和 14.11重量%, 其中 d-C5组分中乙烯 和丙烯选择性分别为 56.19重量%、 53.52重量%和 55.23重量%。
表 1
Figure imgf000007_0001
* c6+为 c6以上产物 表 2
Figure imgf000008_0001
表 3
Figure imgf000008_0002
* c6+为 c6以上产物 实施例 4: 反应评价
以实施例 1、 2、 禾 P 3中制备的 ΜΑΤΟ-1、 MATO-2和 MATO-3催化剂作为反应催 化剂, 压片成型并破碎筛分为 40-60 目。 分别将 10g催化剂装入反应器中, 在 550°C 空气气氛中处理 1小时, 在氮气气氛下降温到反应温度 450°C。按参考实施例 3的表 3 中 MATO-2催化剂上甲醇转化反应 C6以上产物组成中苯、 甲苯、二甲苯、三甲苯和四 甲苯的比例配制芳烃溶液, 将配制的芳烃溶液与甲醇 (按 CH2计;) 按质量比 1 : 1通过 计量泵泵入反应器与催化剂接触反应。 反应压力 0 MPa, 甲醇进料重量空速为 1!^, 反应产物采用气相色谱在线分析,总产物组成、 d-C5组成和 C6以上组分组成如表 4、 5和 6所示。总产物组成中 d-C5组分分别为 52.15重量%、 53.24重量%和 53.76重量%, C6以上组分分别为 47.85重量%、 46.76重量%和 46.24重量%, 其中 d-C5组分中乙烯 和丙烯选择性分别为 90.43重量%、 90.45重量%和 90.11重量%。
表 4
Figure imgf000009_0001
* c6+为 c6以上产物
表 5
Figure imgf000010_0001
表 6
Figure imgf000010_0002
* c6+为 c6以上产物 实施例 5: 反应评价
以实施例 1、 2、 禾 P 3中制备的 ΜΑΤΟ-1、 MATO-2和 MATO-3催化剂作为反应催 化剂, 压片成型并破碎筛分为 40-60 目。 分别将 10g催化剂装入反应器中, 在 550°C 空气气氛中处理 1小时, 在氮气气氛下降温到反应温度 500°C。 按实施例 4的表 6中 MATO-2催化剂上甲醇转化反应 C6以上产物组成中苯、 甲苯、 二甲苯、 三甲苯和四甲 苯的比例配制芳烃溶液, 将配制的芳烃溶液与甲醇 (按 CH2计) 按质量比 1 : 1通过计 量泵泵入反应器与催化剂接触反应。通过背压阀将反应系统压力调节为 0.5 MPa, 甲醇 进料重量空速为 4 h"1, 反应产物采用气相色谱在线分析, 总产物组成、 d-C5组成和 C6以上组分组成如表 7、 8和 9所示。 总产物组成中 d-C5组分分别为 50.32重量%、 51.86重量%和 51.21重量%, C6以上组分分别为 49.68重量%、 48.14重量%和 48.79 重量%,其中 C C5组分中乙烯和丙烯选择性分别为 90.95重量%、 91.22重量%和 91.45 重量%。
表 7
Figure imgf000011_0001
* c6+为 c6以上产物
表 8
Figure imgf000012_0001
表 9
Figure imgf000012_0002
* c6+为 c6以上产物 实施例 6: 反应评价
以实施例 1、 2、 禾 P 3中制备的 ΜΑΤΟ-1、 MATO-2和 MATO-3催化剂作为反应催 化剂, 压片成型并破碎筛分为 40-60 目。 分别将 10g催化剂装入反应器中, 在 550°C 空气气氛中处理 1小时, 在氮气气氛下降温到反应温度 500°C。 按实施例 4的表 6中 MATO-2催化剂上甲醇转化反应 C6以上产物组成中苯、 甲苯、 二甲苯、 三甲苯和四甲 苯的比例配制芳烃溶液, 将配制的芳烃溶液与二甲醚 (按 CH2计) 按质量比 0.5 : 1通 过计量泵泵入反应器与催化剂接触反应, 二甲醚进料重量空速为 3 IT1 , 通过背压阀将 反应系统压力调节为 1.0 MPa, 反应产物采用气相色谱在线分析, 总产物组成、 d-C5 组成和 C6以上组分组成如表 10、 11和 12所示。总产物组成中 d-C5组分分别为 67.46 重量%、 68.57重量%和 68.83重量%, C6以上组分分别为 32.54重量%、 31.43重量% 和 31.17重量%,其中 d-C5组分中乙烯和丙烯选择性分别为 90.76重量%、91.03重量% 和 90.90重量%。
表 10
Figure imgf000013_0001
* c6+为 c6以上产物
表 11
Figure imgf000014_0001
表 12
Figure imgf000014_0002
* c6+为 c6以上产物

Claims

权利 要 求
1、 一种用于甲醇和 /或二甲醚转化制取乙烯和丙烯的催化剂, 所述催化剂是: 镧 和硅烷化联合改性的分子筛催化剂,其中所述分子筛催化剂中的分子筛为 HZSM-5和 / 或 HZSM-11沸石分子筛,
其中通过镧和硅烷化联合改性, 使得催化剂担载镧并由硅化合物修饰表面酸性, 其中镧的担载量为催化剂总重量的 0.5-5重量%,硅化合物以氧化硅计的担载量为催化 剂总重量的 0.1-10重量%。
2、 根据权利要求 1所述的催化剂,其中镧的担载量为催化剂总重量的 1-5重量%, 硅化合物以氧化硅计的担载量为催化剂总重量的 1-10重量%。
3、 一种用于制备根据权利要求 1所述的催化剂的方法, 所述方法包括以下步骤: 将 HZSM-5和 /或 HZSM-11沸石分子筛在硝酸镧溶液中浸渍 1-12小时, 过滤、 烘 干并焙烧, 得到镧改性的分子筛; 和
将得到的镧改性的分子筛在硅源中浸渍 1-12小时, 过滤、 烘干并焙烧, 得到镧和 硅烷化联合改性的分子筛催化剂, 其中所述硅源选自由硅酸四甲酯、 硅酸四乙酯和四 乙基硅组成的组中的一种或多种。
4、 根据权利要求 3所述的方法, 其中镧的担载量为催化剂总重量的 1-5重量%, 硅化合物以氧化硅计的担载量为催化剂总重量的 1-10重量%。
5、 根据权利要求 3所述的方法, 其中硅源为硅酸四乙酯。
6、一种用于由甲醇和 /或二甲醚制取乙烯和丙烯的方法,所述方法包括以下步骤:
(1) 使甲醇和 /或二甲醚与权利要求 1所述的催化剂接触, 反应生成第一碳氢化合 物;
(2) 将步骤 (1)所述的第一碳氢化合物分离成含有乙烯和丙烯的第一 d-C5组分和 第一 C6以上组分;
(3) 将步骤 (2)分离得到的第一 C6以上组分与甲醇和 /或二甲醚混合得到混合物料, 使所述混合物料与权利要求 1所述的催化剂接触, 反应生成第二碳氢化合物;
(4) 将步骤 (3)得到的第二碳氢化合物分离成包含乙烯和丙烯的第二 d-C5组分和 第二 C6以上组分,其中第二 d-C5组分作为目的产物分出,第二 C6以上组分按步骤 (3) 循环使用; 和
(5) 重复步骤 (3)和 (4), 但在步骤 (3)中使用步骤 (4)分离得到的第二 C6以上组分与 甲醇和 /或二甲醚混合得到混合物料; 其中通过 C6以上组分的循环并与甲醇和 /或二甲 醚混合进料反应, 在步骤 (4)中连续获得含有乙烯和丙烯的第二 d-C5产物。
7、 根据权利要求 6所述的方法, 其中反应温度为 400-600°C, 压力为 0-2.0 MPa, 并且甲醇和 /或二甲醚进料重量空速为 0.2-10 11
8、根据权利要求 6所述的方法, 其中所述方法在固定床、移动床或流化床反应器 中进行。
PCT/CN2012/074518 2011-12-19 2012-04-23 甲醇和/或二甲醚制取乙烯丙烯的催化剂、其制法及应用 WO2013091335A1 (zh)

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JP2017518994A (ja) * 2014-06-04 2017-07-13 中国科学院大▲連▼化学物理研究所Dalian Institute Of Chemical Physics,Chinese Academy Of Sciences メタノール及び/又はジメチルエーテルからp−キシレン及びプロピレンを製造する方法
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JP2017518995A (ja) * 2014-06-04 2017-07-13 中国科学院大▲連▼化学物理研究所Dalian Institute Of Chemical Physics,Chinese Academy Of Sciences 高選択率でp−キシレンを製造してプロピレンを併産する方法
JP2017518994A (ja) * 2014-06-04 2017-07-13 中国科学院大▲連▼化学物理研究所Dalian Institute Of Chemical Physics,Chinese Academy Of Sciences メタノール及び/又はジメチルエーテルからp−キシレン及びプロピレンを製造する方法
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