CN113952972A - 非晶态CuxMn1-xCO3催化材料、制备方法及其在制备苯乙酮的应用 - Google Patents
非晶态CuxMn1-xCO3催化材料、制备方法及其在制备苯乙酮的应用 Download PDFInfo
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- KWOLFJPFCHCOCG-UHFFFAOYSA-N Acetophenone Chemical compound CC(=O)C1=CC=CC=C1 KWOLFJPFCHCOCG-UHFFFAOYSA-N 0.000 title claims abstract description 82
- 230000003197 catalytic effect Effects 0.000 title claims abstract description 60
- 239000000463 material Substances 0.000 title claims abstract description 56
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 claims abstract description 64
- 239000011572 manganese Substances 0.000 claims abstract description 51
- 239000010949 copper Substances 0.000 claims abstract description 48
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000006243 chemical reaction Methods 0.000 claims abstract description 21
- 239000000047 product Substances 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000000725 suspension Substances 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 13
- 239000000243 solution Substances 0.000 claims abstract description 13
- 230000008014 freezing Effects 0.000 claims abstract description 10
- 238000007710 freezing Methods 0.000 claims abstract description 10
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims abstract description 9
- 150000001879 copper Chemical class 0.000 claims abstract description 9
- HPDFFVBPXCTEDN-UHFFFAOYSA-N copper manganese Chemical compound [Mn].[Cu] HPDFFVBPXCTEDN-UHFFFAOYSA-N 0.000 claims abstract description 9
- 150000002696 manganese Chemical class 0.000 claims abstract description 9
- 239000002244 precipitate Substances 0.000 claims abstract description 9
- 238000001035 drying Methods 0.000 claims abstract description 8
- 238000001914 filtration Methods 0.000 claims abstract description 8
- 238000005406 washing Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 7
- 239000007864 aqueous solution Substances 0.000 claims abstract description 6
- 238000001556 precipitation Methods 0.000 claims abstract description 5
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- 239000008367 deionised water Substances 0.000 claims abstract description 3
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 14
- 230000001590 oxidative effect Effects 0.000 claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 10
- 239000001301 oxygen Substances 0.000 claims description 10
- 239000007800 oxidant agent Substances 0.000 claims description 7
- 150000004677 hydrates Chemical class 0.000 claims description 5
- 238000001291 vacuum drying Methods 0.000 claims description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 4
- 238000006555 catalytic reaction Methods 0.000 claims description 4
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 4
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims description 2
- 229910021380 Manganese Chloride Inorganic materials 0.000 claims description 2
- GLFNIEUTAYBVOC-UHFFFAOYSA-L Manganese chloride Chemical compound Cl[Mn]Cl GLFNIEUTAYBVOC-UHFFFAOYSA-L 0.000 claims description 2
- 239000003513 alkali Substances 0.000 claims description 2
- 239000001099 ammonium carbonate Substances 0.000 claims description 2
- 235000012501 ammonium carbonate Nutrition 0.000 claims description 2
- 229910000365 copper sulfate Inorganic materials 0.000 claims description 2
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 claims description 2
- XTVVROIMIGLXTD-UHFFFAOYSA-N copper(II) nitrate Chemical compound [Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XTVVROIMIGLXTD-UHFFFAOYSA-N 0.000 claims description 2
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims description 2
- OPQARKPSCNTWTJ-UHFFFAOYSA-L copper(ii) acetate Chemical compound [Cu+2].CC([O-])=O.CC([O-])=O OPQARKPSCNTWTJ-UHFFFAOYSA-L 0.000 claims description 2
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 claims description 2
- 229910052808 lithium carbonate Inorganic materials 0.000 claims description 2
- 229940071125 manganese acetate Drugs 0.000 claims description 2
- 239000011565 manganese chloride Substances 0.000 claims description 2
- 235000002867 manganese chloride Nutrition 0.000 claims description 2
- 229940099607 manganese chloride Drugs 0.000 claims description 2
- 229940099596 manganese sulfate Drugs 0.000 claims description 2
- 239000011702 manganese sulphate Substances 0.000 claims description 2
- 235000007079 manganese sulphate Nutrition 0.000 claims description 2
- UOGMEBQRZBEZQT-UHFFFAOYSA-L manganese(2+);diacetate Chemical compound [Mn+2].CC([O-])=O.CC([O-])=O UOGMEBQRZBEZQT-UHFFFAOYSA-L 0.000 claims description 2
- MIVBAHRSNUNMPP-UHFFFAOYSA-N manganese(2+);dinitrate Chemical compound [Mn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MIVBAHRSNUNMPP-UHFFFAOYSA-N 0.000 claims description 2
- SQQMAOCOWKFBNP-UHFFFAOYSA-L manganese(II) sulfate Chemical compound [Mn+2].[O-]S([O-])(=O)=O SQQMAOCOWKFBNP-UHFFFAOYSA-L 0.000 claims description 2
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 2
- 239000000758 substrate Substances 0.000 claims description 2
- LBJNMUFDOHXDFG-UHFFFAOYSA-N copper;hydrate Chemical compound O.[Cu].[Cu] LBJNMUFDOHXDFG-UHFFFAOYSA-N 0.000 claims 1
- 238000009751 slip forming Methods 0.000 abstract 1
- 239000003054 catalyst Substances 0.000 description 14
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- 238000003760 magnetic stirring Methods 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000001106 transmission high energy electron diffraction data Methods 0.000 description 2
- NQTSTBMCCAVWOS-UHFFFAOYSA-N 1-dimethoxyphosphoryl-3-phenoxypropan-2-one Chemical compound COP(=O)(OC)CC(=O)COC1=CC=CC=C1 NQTSTBMCCAVWOS-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 229940011182 cobalt acetate Drugs 0.000 description 1
- QAHREYKOYSIQPH-UHFFFAOYSA-L cobalt(II) acetate Chemical compound [Co+2].CC([O-])=O.CC([O-])=O QAHREYKOYSIQPH-UHFFFAOYSA-L 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 229910000009 copper(II) carbonate Inorganic materials 0.000 description 1
- 239000011646 cupric carbonate Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- PWZFXELTLAQOKC-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide;tetrahydrate Chemical compound O.O.O.O.[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O PWZFXELTLAQOKC-UHFFFAOYSA-A 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002003 electron diffraction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
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- 229910001701 hydrotalcite Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011656 manganese carbonate Substances 0.000 description 1
- 229910000016 manganese(II) carbonate Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 238000004627 transmission electron microscopy Methods 0.000 description 1
- 238000000101 transmission high energy electron diffraction Methods 0.000 description 1
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- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/20—Carbon compounds
- B01J27/232—Carbonates
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- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
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Abstract
本发明公开了非晶态CuxMn1‑xCO3催化材料、制备方法及其在制备苯乙酮的应用,具体的制备方法步骤如下:S11:将铜盐和锰盐溶解在去离子水中,形成铜锰混合水溶液;S12:室温下将碳酸盐溶液快速加入到S11中的铜锰混合水溶液中,搅拌下不断形成沉淀悬浊液;S13:将S12中的沉淀悬浊液快速加入到液氮中进行冷冻;S14:将S13中冷冻后的产物取出,并进行水洗、过滤,经干燥后得非晶态CuxMn1‑xCO3催化材料。本发明制备的催化材料为非晶态,具有更大的比表面积,从而具有更好的催化效果,其在催化乙苯制备苯乙酮的过程中实现乙苯的转化率超过80%,苯乙酮产品的选择性超过90%。
Description
技术领域
本发明涉及复合材料技术领域,尤其涉及非晶态CuxMn1-xCO3催化材料、制备方法及其在制备苯乙酮的应用。
背景技术
目前,针对乙苯液相氧化制备苯乙酮的体系,其中涉及的催化剂主要包括醋酸钴、金属卟啉、过渡金属配合物、金属酞菁、分子筛、水滑石、杂多化合物等。这些催化剂存在如下的缺点和不足,例如原料成本较高、制备工艺复杂、难以循环使用等;以上催化剂通常呈现结晶态,所对应的比表面积较小,催化位点较少,不利于获得优异的催化效率;而且,乙苯的转化率常低于65%,苯乙酮的选择性常低于80%。
发明内容
基于背景技术存在的技术问题,本发明提出了非晶态CuxMn1-xCO3催化材料、制备方法及其在制备苯乙酮的应用,具有更大的比表面积,从而具有更好的催化效果,且循环多次后仍能够保持很好的催化效果。
本发明提出的非晶态CuxMn1-xCO3催化材料的制备方法,方法步骤如下:
S11:将铜盐和锰盐溶解在去离子水中,形成铜锰混合水溶液;
S12:室温下将碳酸盐溶液快速加入到S11中的铜锰混合水溶液中,搅拌下不断形成沉淀悬浊液;
S13:将S12中的沉淀悬浊液快速加入到液氮中进行冷冻;
S14:将S13中冷冻后的产物取出,并进行水洗、过滤,经干燥后得非晶态CuxMn1-xCO3催化材料。
优选地,所述S11中铜盐为硝酸铜、乙酸铜、氯化铜、硫酸铜及其水合物中的一种。
优选地,所述S11中锰盐为硝酸锰、乙酸锰、氯化锰、硫酸锰及其水合物中的一种。
优选地,所述S11中所述碳酸盐为碳酸钠、碳酸钾、碳酸锂、碳酸铵及其水合物中的一种。
优选地,所述S11中铜盐、锰盐、碳酸盐溶液的摩尔浓度均为0.1-10mol/L,所述铜盐、锰盐、碳酸盐之间的摩尔比为0.01-0.06:0.99-0.94:1。
优选地,所述S12中搅拌的速度为200-400r/min,时间4-6min。
优选地,所述S13中液氮冷冻的条件为:沉淀悬浊液与液氮体积比为1:0.5-1.5,冷冻时间为10-30min。
优选地,所述S14中干燥的条件为:真空干燥,温度35-45℃,时间10-14h。
优选地,所述S14中CuxMn1-xCO3催化材料中的x的范围为0.01-0.06。
本发明提出的上述方法制备的非晶态CuxMn1-xCO3催化材料。
本发明提出的上述非晶态CuxMn1-xCO3催化材料在制备苯乙酮的应用。
优选地,非晶态CuxMn1-xCO3催化材料制备苯乙酮的方法步骤如下:
S21:以乙苯为反应底物,与非晶态CuxMn1-xCO3催化材料加入反应器中;
S22:以氧气为氧化剂,通入反应器中进行催化反应;
S23:反应结束,氧化液经过滤、碱洗后,通过蒸馏分离,收集目标产物苯乙酮。
优选地,所述S21中非晶态CuxMn1-xCO3催化材料的加入量为乙苯摩尔量的2-3%。
优选地,所述S22中催化反应的条件为:氧气流速80-120mL/min,反应温度120-140℃,时间30-40h。
与现有技术相比,本发明的有益技术效果:
(1)本发明涉及的非晶态CuxMn1-xCO3催化材料具有比表面积更大,催化位点更多,催化效率更高等优势。
(2)本发明涉及的非晶态CuxMn1-xCO3催化材料可以实现乙苯的转化率超过80%,苯乙酮产品的选择性超过90%。
(3)本发明涉及的非晶态CuxMn1-xCO3催化材料能够实现循环使用。循环使用5次,其催化效率仍能维持95%。
附图说明
图1为本发明提出的Cu0.04Mn0.96CO3催化材料的XRD图;
图2为本发明提出的Cu0.04Mn0.96CO3催化材料的TEM和SAED图;
图3为本发明提出的Cu0.04Mn0.96CO3催化材料的元素分布图。
具体实施方式
本发明中的试剂均购自国药集团化学试剂有限公司,未经进一步纯化直接使用。实验所用氧气浓度为99.9%。
本发明中的乙苯转化率、苯乙酮选择性的检测方法,采用高效气相色谱内标法定量(安捷伦6890N气相色谱仪),以甲苯为内标。色谱分析条件为:气化室温度280℃;FID检测,检测器温度260℃;柱温采用程序升温,初始温度80℃,以25℃min的速率升至150℃。检测结果,定量分析乙苯、苯乙酮的特征峰,计算可得乙苯转化率和苯乙酮选择性。
实施例1
本发明提出的非晶态Cu0.02Mn0.98CO3催化材料的具体制备过程为:
(1)在100mL水中,将Cu(NO3)2·6H2O与Mn(NO3)2·6H2O配置成混合溶液,浓度分别为0.2mol/L和9.8mol/L;在另一100mL水中,将(NH4)2CO3配置成溶液,浓度为10mol/L;
(2)室温下将(NH4)2CO3溶液快速加入到铜锰混合溶液中,磁力搅拌下不断产生沉淀悬浊液;
(3)将该沉淀悬浊液快速加入到200mL液氮中进行冷冻10min;
(4)将产物从液氮中取出,进行水洗、过滤,并在真空干燥箱中干燥40℃、12h,即得非晶态CuxMn1-xCO3催化材料。
上述非晶态Cu0.02Mn0.98CO3催化材料在乙苯氧化制备苯乙酮的应用:将100mL乙苯和上述催化剂(为乙苯摩尔用量的2.5%)加入到三口烧瓶回流装置中,,以氧气为氧化剂,并控制气体流速为100mL/min,在130℃下反应36h,制得目标产物苯乙酮。通过高效气相色谱内标法进行分析,结果表明乙苯转化率为83.3%,苯乙酮选择性为92.2%。催化剂循环5次后苯乙酮收率保持率为95.2%。
实施例2
本发明提出的非晶态Cu0.04Mn0.96CO3催化材料的具体制备过程为:
(1)在100mL水中,将Cu(NO3)2·6H2O与Mn(NO3)2·6H2O配置成混合溶液,浓度分别为0.2mol/L和3.8mol/L;在另一100mL水中,将(NH4)2CO3配置成溶液,浓度为4.0mol/L;
(2)室温下将(NH4)2CO3溶液快速加入到铜锰混合溶液中,磁力搅拌下不断产生沉淀悬浊液;
(3)将该沉淀悬浊液快速加入到200mL液氮中进行冷冻15min;
(4)将产物从液氮中取出,进行水洗、过滤,并在真空干燥箱中干燥40℃、12h,即得非晶态CuxMn1-xCO3催化材料。
上述非晶态Cu0.04Mn0.94CO3催化材料在乙苯氧化制备苯乙酮的应用:将100mL乙苯和上述催化剂(为乙苯摩尔用量的2.5%)加入到三口烧瓶回流装置中,以氧气为氧化剂,并控制气体流速为100mL/min,在130℃下反应36h,制得目标产物苯乙酮。通过高效气相色谱内标法进行分析,结果表明乙苯转化率为84.8%,苯乙酮选择性为93.6%。催化剂循环5次后苯乙酮收率保持率为96.9%。
实施例3
本发明提出的非晶态Cu0.06Mn0.94CO3催化材料的具体制备过程为:
(1)在100mL水中,将Cu(NO3)2·6H2O与Mn(NO3)2·6H2O配置成混合溶液,浓度分别为0.2mol/L和3.1mol/L;在另一100mL水中,将(NH4)2CO3配置成溶液,浓度为3.3mol/L;
(2)室温下将(NH4)2CO3溶液快速加入到铜锰混合溶液中,磁力搅拌下不断产生沉淀悬浊液;
(3)将该沉淀悬浊液快速加入到200mL液氮中进行冷冻20min;
(4)将产物从液氮中取出,进行水洗、过滤,并在真空干燥箱中干燥40℃、12h,即得非晶态CuxMn1-xCO3催化材料。
上述非晶态Cu0.06Mn0.94CO3催化材料在乙苯氧化制备苯乙酮的应用:将100mL乙苯和上述催化剂(为乙苯摩尔用量的2.5%)加入到三口烧瓶回流装置中,以氧气为氧化剂,并控制气体流速为100mL/min,在130℃下反应36h,制得目标产物苯乙酮。通过高效气相色谱内标法进行分析,结果表明乙苯转化率为82.1%,苯乙酮选择性为91.8%。催化剂循环5次后苯乙酮收率保持率为95.1%。
对比例1
CuCO3催化材料在乙苯氧化制备苯乙酮的应用:将100mL乙苯和上述催化剂(为乙苯摩尔用量的2.5%)加入到三口烧瓶回流装置中,以氧气为氧化剂,并控制气体流速为100mL/min,在130℃下反应36h,制得目标产物苯乙酮。通过高效气相色谱内标法进行分析,结果表明乙苯转化率为18.2%,苯乙酮选择性为22.9%。催化剂循环5次后苯乙酮收率保持率为76.6%。
对比例2
MnCO3催化材料在乙苯氧化制备苯乙酮的应用:将100mL乙苯和上述催化剂(为乙苯摩尔用量的2.5%)加入到三口烧瓶回流装置中,以氧气为氧化剂,并控制气体流速为100mL/min,在130℃下反应36h,制得目标产物苯乙酮。通过高效气相色谱内标法进行分析,结果表明乙苯转化率为26.8%,苯乙酮选择性为39.3%。催化剂循环5次后苯乙酮收率保持率为84.3%。
以实施例2制备的非晶态Cu0.04Mn0.96CO3催化材料为例进行相关的测试,其中图1是非晶态Cu0.04Mn0.96CO3催化材料的X-射线衍射(XRD)图。可以看出,在2θ为5-80°的范围内,存在着低强度、宽泛的衍射峰,表明本发明涉及的Cu0.04Mn0.96CO3具有非晶态的特点。
图2是非晶态Cu0.04Mn0.96CO3催化材料透射电镜(TEM)和选取电子衍射(SAED)图。可以看出,该材料是由无规则纳米颗粒构成的(部分颗粒发生了团聚现象),尺寸为30-100nm。此外,SAED图呈现出明显的非晶特征,这与图1中的XRD结果相吻合。
图3是非晶态Cu0.04Mn0.96CO3催化材料的元素组成图(在Mo网上进行测试)。可以看出,该材料是由Cu、Mn、C、O元素组成的,且组成比例与标准值基本一致。
以上仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (10)
1.非晶态CuxMn1-xCO3催化材料的制备方法,其特征在于,方法步骤如下:
S11:将铜盐和锰盐溶解在去离子水中,形成铜锰混合水溶液;
S12:室温下将碳酸盐溶液快速加入到S11中的铜锰混合水溶液中,搅拌下不断形成沉淀悬浊液;
S13:将S12中的沉淀悬浊液快速加入到液氮中进行冷冻;
S14:将S13中冷冻后的产物取出,并进行水洗、过滤,经干燥后得非晶态CuxMn1-xCO3催化材料。
2.根据权利要求1所述的非晶态CuxMn1-xCO3催化材料的制备方法,其特征在于,所述S11中铜盐为硝酸铜、乙酸铜、氯化铜、硫酸铜及其水合物中的一种;
优选地,所述S11中锰盐为硝酸锰、乙酸锰、氯化锰、硫酸锰及其水合物中的一种;
优选地,所述S11中所述碳酸盐为碳酸钠、碳酸钾、碳酸锂、碳酸铵及其水合物中的一种。
3.根据权利要求1或2所述的非晶态CuxMn1-xCO3催化材料的制备方法,其特征在于,所述S11中铜盐、锰盐、碳酸盐溶液的摩尔浓度均为0.1-10mol/L,所述铜盐、锰盐、碳酸盐之间的摩尔比为0.01-0.06:0.99-0.94:1。
4.根据权利要求1所述的非晶态CuxMn1-xCO3催化材料的制备方法,其特征在于,所述S12中搅拌的速度为200-400r/min,时间4-6min;
优选地,所述S13中液氮冷冻的条件为:沉淀悬浊液与液氮体积比为1:0.5-1.5,冷冻时间为10-30min。
5.根据权利要求1所述的非晶态CuxMn1-xCO3催化材料的制备方法,其特征在于,所述S14中干燥的条件为:真空干燥,温度35-45℃,时间10-14h。
6.根据权利要求1所述的非晶态CuxMn1-xCO3催化材料的制备方法,其特征在于,所述S14中CuxMn1-xCO3催化材料中的x的范围为0.01-0.06。
7.如权利要求1-6任一项所述方法制备的非晶态CuxMn1-xCO3催化材料。
8.如权利要求7所述的非晶态CuxMn1-xCO3催化材料在制备苯乙酮的应用。
9.根据权利要求8所述的非晶态CuxMn1-xCO3催化材料在制备苯乙酮的应用,其特征在于,非晶态CuxMn1-xCO3催化材料制备苯乙酮的方法步骤如下:
S21:以乙苯为反应底物,与非晶态CuxMn1-xCO3催化材料加入反应器中;
S22:以氧气为氧化剂,通入反应器中进行催化反应;
S23:反应结束,氧化液经过滤、碱洗后,通过蒸馏分离,收集目标产物苯乙酮。
10.根据权利要求9所述的非晶态CuxMn1-xCO3催化材料在制备苯乙酮的应用,其特征在于,所述S21中非晶态CuxMn1-xCO3催化材料的加入量为乙苯摩尔量的2-3%。
优选地,所述S22中催化反应的条件为:氧气流速80-120mL/min,反应温度120-140℃,时间30-40h。
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