CN107519939B - 一种用于酯化反应和氧化反应的类水滑石掺杂铜催化剂 - Google Patents
一种用于酯化反应和氧化反应的类水滑石掺杂铜催化剂 Download PDFInfo
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Abstract
本发明提供了一种用于酯化反应和氧化反应的类水滑石掺杂铜催化剂；该催化剂与传统的铜催化剂相比，这种负载催化剂对于酯化反应和氧化反应的催化性能较好；具有更高效的催化性能，优点在于负载催化剂的活性较高；可回收再利用,使用寿命长；所用原料简单易得。因此，该复合催化剂的设计合成具有较好的工业应用前景。
Description
技术领域
本发明涉及一种用于酯化反应和氧化反应的类水滑石掺杂铜催化剂；类水滑石是一类具有典型层状结构的复合金属氢氧化物，因其特有的结构特性，可以大量吸附粒子使其作为催化剂或催化剂载体，因此设计一种类水滑石负载的新型高效的催化剂对酯化反应和氧化意义重大，属于化学材料与药物领域。
背景技术
水滑石类化合物包括水滑石和类水滑石。其主体一般由两种金属的氢氧化物组成，又称为层状双羟基复合金属氧化物。水滑石具有优良的热稳定性、吸附性、固体碱性、无毒性、阻燃性等性质，在催化剂载体、吸附材料等研究领域获得极大关注。以水滑石为载体负载金属纳米粒子或者金属配合物可以得到一种优异的负载催化剂，得到了国内外广泛的关注和研究应用。然而，以类水滑石作为载体的报道相对很少。负载催化剂具有反应条件温和的优点，对化工设备不存在腐蚀作用，可回收重复使用等优点。
为了酯化反应和氧化反应往往需要强酸作为催化剂，对于环境和现代生产影响较大，同时结合负载催化剂的优点，本发明设计以类水滑石(LHT)为载体，合成了一种用于酯化反应和氧化反应的类水滑石掺杂铜催化剂：Cu@Mg@LHT，该负载催化剂目前尚未报道。
发明内容
1.本发明公开了一种用于酯化反应和氧化反应的类水滑石掺杂铜催化剂。在我们的研究中发现，这种负载催化剂对于酯化反应和氧化反应的催化性能较好。
所述一种用于酯化反应和氧化反应的类水滑石掺杂铜催化剂，其特征在于，包括如下步骤：(1)Cu(diphenyl)Cl2的制备：将1.7g的CuCl2·H2O溶解于10～100mL的无水乙醇中。把1.5g的联苯配体溶于10～100mL无水乙醇中并且加入上述溶液中，混合溶液在室温下搅拌1～24h，过滤生成的沉淀物，收集干燥可得产品。(2)水滑石负载Cu(diphenyl)Cl2配合物的制备：取0.50～2.00g类水滑石，加入0.01-0.2g的MgO，再加入0.10～0.30g的Cu(diphenyl)Cl2于20～50mL的甲苯中搅拌回流12～24h，冷却，离心，再用蒸馏水与乙醇分别洗3～5次，干燥的到产物Cu@Mg@LHT。最后将其在马弗炉中焙烧，以10℃/min升温到250～600℃，保持1～48h。真空干燥器中保存。
上述类水滑石掺杂铜催化剂Cu@Mg@LHT应用于催化甘油和乙酸酯化反应的应用，其特征在于：将甘油和乙酸按照醇酸摩尔比1:2～1:6加入反应器中，再加入40～60mL的甲苯和质量为反应物总质量的0.1～2％的复合负载铱催化剂Cu@Mg@LHT，在反应温度为110℃～190℃，回流分水，搅拌反应1～7h，得到含有乙酸甘油酯的混合物。
上述类水滑石掺杂铜催化剂Cu@Mg@LHT应用于醇的氧化反应的应用，其特征在于：在100mL的圆底烧瓶中，将1-苯乙醇(1.0mmol)加入到瓶中，之后加入碳酸钾(1.5mmol)和20mL的乙酸乙酯。最后加入50mg的类水滑石掺杂铜催化剂Cu@Mg@LHT，加热回流搅拌2-24h。得到含有苯乙酮的粗产物。
附图说明
图1本发明制备的类水滑石掺杂铜催化剂Cu@Mg@LHT的电镜图谱。
具体实施方式
如上述所述的常应用酯化反应和氧化反应工艺中。本发明提供的这种负载催化剂可以显著提高催化剂活性,而且催化剂可回收再利用，使用效率高，催化剂使用寿命长。
以下，申请人对本发明已经做了一些具体实验，表述了类水滑石负载掺杂铜配合物催化剂的制备，并列举了用此类负载催化剂催化酯化反应的具体步骤。这些仅用于详尽说明本发明，并不以任何方式限制发明的范围。
实施例一：一种用于酯化反应和氧化反应的类水滑石掺杂铜催化剂，包括以下工艺步骤：(1)Cu(diphenyl)Cl2的制备：将1.7g的CuCl2·H2O溶解于100mL的无水乙醇中。把1.5g的联苯配体溶于100mL无水乙醇中并且加入上述溶液中，混合溶液在室温下搅拌24h，过滤生成的沉淀物，收集干燥可得产品。(2)水滑石负载Cu(diphenyl)Cl2配合物的制备：取2.00g类水滑石，加入0.01g的MgO，再加入0.10g的Cu(diphenyl)Cl2于50mL的甲苯中搅拌回流24h，冷却，离心，再用蒸馏水与乙醇分别洗5次，干燥的到产物Cu@Mg@LHT。最后将其在马弗炉中焙烧，以10℃/min升温到600℃，保持48h。真空干燥器中保存。
实施例二：在250mL圆底烧瓶中，加入0.1mol甘油，0.6mol乙酸和40mL甲苯，再加入0.3g的催化剂Cu@Mg@LHT，在反应温度为110℃，回流分水，搅拌反应12h，经色谱分析，甘油转化率为100％，二乙酸甘油酯的选择性为87％，三乙酸甘油酯的选择性为6％。
实施例三：在100mL的圆底烧瓶中，将1-苯乙醇(1.0mmol)加入到瓶中，之后加入碳酸钾(1.5mmol)和20mL的乙酸乙酯。最后加入50mg的类水滑石掺杂铜催化剂Cu@Mg@LHT，加热回流搅拌12h。得到苯乙酮，产率93％。
实施例四：在100mL的圆底烧瓶中，将对甲基-1-苯乙醇(1.0mmol)加入到瓶中，之后加入碳酸钾(1.5mmol)和20mL的乙酸乙酯。最后加入50mg的类水滑石掺杂铜催化剂Cu@Mg@LHT，加热回流搅拌12h。得到对甲基苯乙酮，产率96％。
实施例五：在100mL的圆底烧瓶中，将1-苯乙醇(1.0mmol)加入到瓶中，之后加入碳酸钾(1.5mmol)和20mL的乙酸乙酯。最后加入50mg回收的类水滑石掺杂铜催化剂Cu@Mg@LHT，加热回流搅拌12h。得到苯乙酮，产率91％。
Claims (4)
1.一种用于酯化反应和氧化反应的类水滑石掺杂铜催化剂的制备方法，其特征在于，包括如下步骤：
(1)Cu(diphenyl)Cl2的制备：将1.7g的CuCl2·H2O溶解于10～100mL的无水乙醇中；把1.5g的联苯配体溶于10～100mL无水乙醇中并且加入上述溶液中，混合溶液在室温下搅拌1～24h，过滤生成的沉淀物，收集干燥可得产品；
(2)水滑石负载Cu(diphenyl)Cl2配合物的制备：取0.50～2.00g类水滑石，加入0.01-0.2g的MgO，再加入0.10～0.30g的Cu(diphenyl)Cl2于20～50mL的甲苯中搅拌回流12～24h，冷却，离心，再用蒸馏水与乙醇分别洗3～5次，干燥得 到产物Cu@Mg@LHT，最后将其在马弗炉中焙烧，以10℃/min升温到250～600℃，保持1～48h，真空干燥器中保存。
2.权利要求1所述方法制备得到的类水滑石掺杂铜催化剂。
3.权利要求2中所述的类水滑石掺杂铜催化剂在催化甘油和乙酸酯化反应中的应用，其特征在于，所述应用为：将甘油和乙酸按照醇酸摩尔比1:2～1:6加入反应器中，再加入40～60mL的甲苯和质量为反应物总质量的0.1～2％的类水滑石掺杂铜催化剂，在反应温度为110℃～190℃，回流分水，搅拌反应1～7h，得到含有乙酸甘油酯的混合物。
4.权利要求2中所述的类水滑石掺杂铜催化剂在醇的氧化反应中的应用，其特征在于，所述应用为：在100mL的圆底烧瓶中，将1.0mmol 1-苯乙醇加入到瓶中，之后加入1.5mmol碳酸钾和20mL的乙酸乙酯；最后加入50mg的类水滑石掺杂铜催化剂，加热回流搅拌2-24h；得到含有苯乙酮的粗产物。
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| CN106179294A (zh) * | 2016-07-11 | 2016-12-07 | 山东师范大学 | 一种水滑石催化剂双效催化合成吲哚化合物的方法 |
| CN106964404A (zh) * | 2017-03-29 | 2017-07-21 | 南京工程学院 | 一种用于醇氧化生产醛酮的新型催化剂及其制备方法 |
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