CN111977666B - 一种zsm-5沸石分子筛的制备方法及应用 - Google Patents
一种zsm-5沸石分子筛的制备方法及应用 Download PDFInfo
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- 239000002808 molecular sieve Substances 0.000 title claims abstract description 31
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 229910021536 Zeolite Inorganic materials 0.000 title claims abstract description 28
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 239000010457 zeolite Substances 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 77
- 238000002425 crystallisation Methods 0.000 claims abstract description 74
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- 238000000034 method Methods 0.000 claims abstract description 22
- 238000010791 quenching Methods 0.000 claims abstract description 14
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 6
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- 239000006229 carbon black Substances 0.000 claims description 6
- 229910052739 hydrogen Inorganic materials 0.000 claims description 6
- 239000001257 hydrogen Substances 0.000 claims description 6
- 238000011068 loading method Methods 0.000 claims description 6
- 229910001388 sodium aluminate Inorganic materials 0.000 claims description 6
- BNGXYYYYKUGPPF-UHFFFAOYSA-M (3-methylphenyl)methyl-triphenylphosphanium;chloride Chemical compound [Cl-].CC1=CC=CC(C[P+](C=2C=CC=CC=2)(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 BNGXYYYYKUGPPF-UHFFFAOYSA-M 0.000 claims description 5
- 229910052697 platinum Inorganic materials 0.000 claims description 4
- 235000019353 potassium silicate Nutrition 0.000 claims description 4
- 229910052707 ruthenium Inorganic materials 0.000 claims description 4
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 4
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 4
- 230000004913 activation Effects 0.000 claims description 3
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 3
- HBGGXOJOCNVPFY-UHFFFAOYSA-N diisononyl phthalate Chemical compound CC(C)CCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCC(C)C HBGGXOJOCNVPFY-UHFFFAOYSA-N 0.000 claims description 3
- 150000002148 esters Chemical class 0.000 claims description 3
- 229910000510 noble metal Inorganic materials 0.000 claims description 2
- 238000002288 cocrystallisation Methods 0.000 claims 1
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- 230000000694 effects Effects 0.000 abstract description 5
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- -1 phthalic acid ester Chemical class 0.000 abstract 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 3
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- 238000004438 BET method Methods 0.000 description 1
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 description 1
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 239000001164 aluminium sulphate Substances 0.000 description 1
- 235000011128 aluminium sulphate Nutrition 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000005899 aromatization reaction Methods 0.000 description 1
- 238000004523 catalytic cracking Methods 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- BUACSMWVFUNQET-UHFFFAOYSA-H dialuminum;trisulfate;hydrate Chemical compound O.[Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O BUACSMWVFUNQET-UHFFFAOYSA-H 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000001338 self-assembly Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003746 solid phase reaction Methods 0.000 description 1
- BGQMOFGZRJUORO-UHFFFAOYSA-M tetrapropylammonium bromide Chemical compound [Br-].CCC[N+](CCC)(CCC)CCC BGQMOFGZRJUORO-UHFFFAOYSA-M 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- C01B39/00—Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
- C01B39/02—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
- C01B39/36—Pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11
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- B01J29/42—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 containing iron group metals, noble metals or copper
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Abstract
本发明公开了一种长须状ZSM‑5沸石分子筛的制备方法及应用,其特征在于将分子筛通过如下步骤制得:(1)预晶化液的制取;(2)合成液母液的制取;(3)将预晶化液加入到合成液母液中,预晶化液与合成液母液的质量比为0.1~1.0,晶化釜放置于摇摆烘箱内,一定温度预晶化一定时间后,急冷,洗涤,干燥,合成的ZSM‑5沸石分子筛具有比较大的比表面积,且结晶度高,无需添加有机模板剂和焙烧等后续工序,通过活性浸渍,在邻苯二甲酸酯加氢的反应中活性高,寿命长。
Description
技术领域
本发明涉及分子筛的合成方法,具体涉及一种长须状ZSM-5沸石分子筛的制备,属于无机材料制备技术领域。
背景技术
ZSM-5沸石分子筛是一类具有微孔孔道均一的多孔材料,广泛用在催化和分离材料中。不仅可以用于气固相反应(催化裂化),还可用于液相反应(环己烯水合反应)。
1972年美孚公司(R. J. Argauer, G. R. Landolt. US 3702886, 1972)首次报道采用有机模板剂成功合成ZSM-5沸石。后续很多学者也都报道了有机模板剂法合成ZSM-5沸石分子筛。有机模板剂的使用会带来很多问题,比如提高合成成本,模板剂去除不完全会堵塞孔道,从而影响催化剂的活性。模板剂的分解会给大气和水带来污染等环境问题。
1981年Flanigen等(R.W. Grose, E.M.Flanigen. US 4257885, 1981)报道了无模板剂法合成ZSM-5沸石。1986年,李赫亘等(李赫亘,项寿鹤,刘述全. CN 85100463,1988)专利公开了“直接法”合成ZSM-5。
而不同晶体形貌的ZSM-5沸石分子筛在催化反应中的选择性、反应活性及稳定性等方面均有明显的差异,也因此引起研究者的极大兴趣。
Choi . M等报道了用一种有两个氨基的疏水长链有机模板剂合成出了厚度为2nm的薄层状特殊形貌MFI分子筛(Choi . M , Na . K , Kim . J , Sakamoto . Y ,Terasaki . O &Ryoo . R , Nature ., 2009 , 461 , 246–249.)。
Dong . F等报道了一种通过自组装机制形成花瓣状多孔材料(Dong . F , Lee .S . C , Wu . Z , Huang . Y , Fu . M , Ho . W . K , Zou . Sand Wang . B , J .Hazard . Mater ., 2011 , 195 , 346–354.)。
中国专利CN 106430237公开了采用双有机模板剂(十六烷基三甲基溴化铵和四丙基溴化铵)的方法合成长须状ZSM-5沸石分子筛,在甲醇和二甲醚芳构化的反应中表现优良。
发明内容
本发明的目的是为了提供一种无模板剂长须状ZSM-5沸石分子筛的合成方法,即在无模板剂的条件下,采用摇摆烘箱,预晶化液添加的方法,合成得到一种无模板剂长须状ZSM-5沸石分子筛。
本发明的特点是,采用无模板剂法合成长须状ZSM-5沸石分子筛。
本发明的主要技术方案:ZSM-5沸石分子筛的制备方法,其特征在于制备方法包括:预晶化液制备、合成母液配制、预晶化液加入到合成液母液晶化;所述预晶化、晶化过程中,晶化釜处于摆动状态。
本发明一种典型的制备方法,ZSM-5分子筛通过如下步骤制得:(1)预晶化液制备:摩尔组成为10~30Na2O:100SiO2:1.25~5.0Al2O3: 12SO4 2-:2000~6000H2O,室温下搅拌20-24小时后装入晶化釜内,晶化釜置于摇摆烘箱内,使晶化釜摆动,预晶化后,急冷,得到预晶化液;
(2)合成母液配制:摩尔组成为10~30Na2O:100SiO2:1.25~5.0Al2O3: 12SO4 2-:2000~ 6000H2O,室温下搅拌20-24小时;
(3)将预晶化液加入到合成液母液中,预晶化液与合成液母液的质量比为0.1~1.0,晶化釜放置于摇摆烘箱内摆动,晶化,急冷,洗涤,干燥得到长须状ZSM-5沸石分子筛。
一般地,所述沸石分子筛的制备方法,其特征在于摇摆烘箱内设有隔板,隔板用滑轮连接,隔板可摆动,晶化釜放置于隔板上,摆动所需能量由烘箱外部提供,摆动频率为25-35次/分钟,优选30次/分钟。
所述沸石分子筛的制备方法,其特征在于所用的SiO2采用硅溶胶、水玻璃或白炭黑。
所述沸石分子筛的制备方法,其特征在于所用的Al2O3采用硫酸铝、硝酸铝、氯化铝或铝酸钠。
将所得ZSM-5分子筛浸渍Ru、Pd、Pt等贵金属中的一种,其中Ru、Pd、Pt的百分含量为1%,得到加氢催化剂。
将上述催化剂用于加氢反应,催化剂在反应之前经过氢气活化,活化条件为:GHSV=2000h-1,1.0MPa,300℃,还原时间12h。反应温度200℃,氢气压力为5.0MPa,H2/酯摩尔比为150,邻苯二甲酸二异壬酯的重量空速为0.5h-1,反应时间为200h。
本发明方法合成得到的长须状ZSM-5沸石分子筛不需要焙烧过程,可以直接进行活性浸渍而制得各种催化剂。
附图说明
图1为本发明实施例中摇摆烘箱示意图。
图2为本发明实施例3合成得到的ZSM-5沸石分子筛SEM图。
图3为本发明实施例3合成得到的ZSM-5沸石分子筛XRD谱图。
具体实施方式
下面通过一系列实施例对本发明作进一步阐述。
实施例:无模板剂长须状ZSM-5沸石分子筛的合成方法的步骤如下:
(1)预晶化液的制取:摩尔组成为10~30Na2O:100SiO2:1.25~5.0Al2O3: 12SO4 2-:2000~6000H2O,室温下搅拌24小时后装入晶化釜内,晶化釜放置于摇摆烘箱内左右摆动,80℃~200℃晶化2h~12h后,急冷,得到预晶化液;
(2)合成液母液的配制:摩尔组成为10~30Na2O:100SiO2:1.25~5.0Al2O3:12SO4 2-:2000~6000H2O,室温下搅拌24小时;
(3)将预晶化液加入到合成液母液中,预晶化液与合成液母液的质量比为0.1~1.0,晶化釜放置于摇摆烘箱内左右摆动,摇摆烘箱温度设置为150℃~200℃晶化24~120小时后,急冷,洗涤,通过活性浸渍后干燥。
所述摇摆烘箱的结构参见附图1。
所用的SiO2采用硅溶胶、水玻璃或白炭黑,所用的Al2O3采用硫酸铝、硝酸铝、氯化铝或铝酸钠。
对比例
(1)预晶化液的制取:摩尔组成为20Na2O:100SiO2:3.0Al2O3:12SO4 2-:4000H2O,室温下搅拌24小时后装入晶化釜内,晶化釜放置于烘箱内处于静止,110℃晶化7h后,急冷,得到预晶化液;
(2)合成液母液的配制:摩尔组成为20Na2O:100SiO2:3.0Al2O3:12SO4 2-: 4000H2O,室温下搅拌24小时;
(3)将预晶化液加入到合成液母液中,预晶化液与合成液母液的质量比为0.5,晶化釜放置于烘箱内处于静止,烘箱温度设置为180℃晶化72小时后,急冷,洗涤,通过浸渍1%活性组份Pt后干燥,得到催化剂A。
所用的SiO2采用白炭黑,所用的Al2O3采用铝酸钠。
实施例1
(1)预晶化液的制取:摩尔组成为10Na2O:100SiO2:1.25Al2O3:12SO4 2-:2000H2O,室温下搅拌24小时后装入晶化釜内,晶化釜放置于摇摆烘箱内左右摆动,摆动频率30次/分钟,80℃晶化2h后,急冷,得到预晶化液;
(2)合成液母液的配制:摩尔组成为10Na2O:100SiO2:1.25Al2O3:12SO4 2-: 2000H2O,室温下搅拌24小时;
(3)将预晶化液加入到合成液母液中,预晶化液与合成液母液的质量比为0.1,晶化釜放置于摇摆烘箱内左右摆动,摆动频率30次/分钟,摇摆烘箱温度设置为150℃晶化24小时后,急冷,洗涤,通过浸渍1%活性组份Ru后干燥,得到催化剂Ⅰ。
所用的SiO2采用硅溶胶,所用的Al2O3采用硫酸铝。
实施例2
(1)预晶化液的制取:摩尔组成为30Na2O:100SiO2: 5.0Al2O3:12SO4 2-:6000H2O,室温下搅拌24小时后装入晶化釜内,晶化釜放置于摇摆烘箱内左右摆动,摆动频率30次/分钟,200℃晶化12h后,急冷,得到预晶化液;
(2)合成液母液的配制:摩尔组成为30Na2O:100SiO2:5.0Al2O3:12SO4 2-: 6000H2O,室温下搅拌24小时;
(3)将预晶化液加入到合成液母液中,预晶化液与合成液母液的质量比为1.0,晶化釜放置于摇摆烘箱内左右摆动,摆动频率30次/分钟,摇摆烘箱温度设置为200℃晶化120小时后,急冷,洗涤,通过浸渍1%活性组份Pd后干燥,得到催化剂Ⅱ。
所用的SiO2采用水玻璃,所用的Al2O3采用硝酸铝。
实施例3
(1)预晶化液的制取:摩尔组成为20Na2O:100SiO2:3.0Al2O3:12SO4 2-:4000H2O,室温下搅拌24小时后装入晶化釜内,晶化釜放置于摇摆烘箱内左右摆动,摆动频率30次/分钟,110℃晶化7h后,急冷,得到预晶化液;
(2)合成液母液的配制:摩尔组成为20Na2O:100SiO2:3.0Al2O3:12SO4 2-: 4000H2O,室温下搅拌24小时;
(3)将预晶化液加入到合成液母液中,预晶化液与合成液母液的质量比为0.5,晶化釜放置于摇摆烘箱内左右摆动,摆动频率30次/分钟,摇摆烘箱温度设置为180℃晶化72小时后,急冷,洗涤,通过浸渍1%活性组份Pt后干燥,得到催化剂Ⅲ。
所用的SiO2采用白炭黑,所用的Al2O3采用铝酸钠。
本实施例合成得到的ZSM-5沸石分子筛SEM图见图2,XRD谱图见图3。
实施例4
同实施例1,所用的SiO2采用白炭黑,得到催化剂Ⅳ。
实施例5
同实施例1,所用的Al2O3采用硝酸铝,得到催化剂Ⅴ。
实施例6
同实施例1,所用的Al2O3采用氯化铝,得到催化剂Ⅵ。
实施例7
同实施例1,所用的Al2O3采用铝酸钠,得到催化剂ⅤⅡ。
催化剂性能评价:
催化剂A、Ⅰ、Ⅱ、Ⅲ、Ⅳ、Ⅴ、Ⅵ、ⅤⅡ分别装填在滴流床式反应器中,催化剂在反应之前经过氢气活化,活化条件为:GHSV=2000h-1,1.0MPa,300℃,还原时间12h。反应温度200℃,氢气压力为5.0MPa,H2/酯摩尔比为150,邻苯二甲酸二异壬酯的重量空速为0.5h-1,反应时间为200h,取样分析。
催化剂的比表面积采用BET法分析。各项数据见表1。活性评价数据见表2。
表1催化剂各性能参数
表2活性评价数据
由表1可以看出,采用上述方法得到的催化剂具有很高的比表面积。由表2可以看出,采用本发明得到的催化剂Ⅰ~ⅤⅡ长时间运行后仍具有较高的加氢性能,说明催化剂具有很好的稳定性。
Claims (9)
1.一种ZSM-5沸石分子筛的应用方法,其特征在于先制备ZSM-5沸石分子筛,通过如下步骤制得:(1)预晶化液制备:摩尔组成为10~30Na2O:100SiO2:1.25~5.0Al2O3: 12SO4 2-:2000~6000H2O,室温下搅拌20-24小时后装入晶化釜内,晶化釜置于摇摆烘箱内,使晶化釜摆动,预晶化后,急冷,得到预晶化液;(2)合成母液配制:摩尔组成为10~30Na2O:100SiO2:1.25~5.0Al2O3: 12SO4 2-:2000~ 6000H2O,室温下搅拌20-24小时;(3)将预晶化液加入到合成液母液中,预晶化液与合成液母液的质量比为0.1~1.0,晶化釜放置于摇摆烘箱内摆动,晶化,急冷,洗涤,干燥得到长须状ZSM-5沸石分子筛;将得到的ZSM-5沸石分子筛浸渍活性组分后用于加氢反应,催化剂在反应之前经过氢气活化,活化条件为:GHSV=2000h-1,1.0MPa,300℃,还原时间12h,反应温度200℃,氢气压力为5.0MPa,H2/酯摩尔比为150,邻苯二甲酸二异壬酯的重量空速为0.5h-1。
2.根据权利要求1所述的应用方法,其特征在于所述摇摆烘箱内设有隔板,隔板用滑轮连接,隔板可摆动,晶化釜放置于隔板上,摆动所需能量由烘箱外部提供,摆动频率为25-35次/分钟。
3.根据权利要求1所述的应用方法,其特征预晶化温度为80℃~200℃。
4.根据权利要求1所述的应用方法,其特征在于预晶化液的晶化时间为2h~12h。
5.根据权利要求1所述的应用方法,其特征在于预晶化液和合成母液共同晶化温度为150℃~200℃。
6.根据权利要求1所述的应用方法,其特征在于预晶化液和母液共同晶化时间为24h~120h。
7.根据权利要求1所述的应用方法,其特征在于所用的SiO2采用硅溶胶、水玻璃或白炭黑。
8.根据权利要求1所述的应用方法,其特征在于所用的Al2O3采用硫酸铝、硝酸铝、氯化铝或铝酸钠。
9.根据权利要求1所述的应用方法,其特征在于浸渍的活性组份为Ru、Pd、Pt的贵金属中的一种,Ru、Pd、Pt的百分含量为1%。
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