Synthesis of Surface Covered Solid Acid and Base

表面覆盖固体酸和碱的合成

• 批准号: 19560768
• 负责人: MATSUHASHI Hiromi
• 金额: $ 3.33万
• 依托单位: Hokkaido University of Education
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2007
• 资助国家: 日本
• 起止时间: 2007 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-19560768/
• 关键词: 触媒・化学プロセス; 固体酸・塩基; 有機工業化学; 格子欠陥; 表面・界面物性

Solid bases of MgO and CaO, and solid superacid of sulfated zirconia were covered with metal oxides which show no or less acidic and basic characters to prepare solid acid and base catalysts showing tolerance to H_2O and CO_2. The oxides of Al, Si, Ti, and Zr were used for covering solid acids and base catalysts. A new preparing technique of surface gelation was applied for covering. This is the technique that a metal alkoxide dissolved in ethyl acetate is decomposed on metal oxide or hydroxide surface by their acid or base properties.MOx/MgO (M=Al, Si, Ti, Zr) and M'Ox/CaO (M'=Al, Si, Ti) were prepared by the developed surface gelation technique. Among the synthesized solid base catalysts, Al_2O_3/MgO, Al_2O_3/CaO, and TiO_2/CaO showed higher catalytic activity for retro-aldol reaction of diacetone alcohol. The solubility of CaO could not be disturbed by covering it with SiO2 bysingle deposition procedures. The elution of Ca^<2+> was strongly inhibited by covering by double deposition method.The sulfated zirconia was covered with zirconium oxide by surface gelation to inhibit the elution of sulfate ion bonded to zirconia surface. However, the inhibition effect was not observed. The catalytic activity was largely increased.

在MgO和CaO的固体碱和硫酸氧化锆的固体超强酸表面覆盖不具有或不具有酸性和碱性的金属氧化物，制备出耐H_2O和CO_2的固体酸碱催化剂。铝、硅、钛和锆的氧化物被用于覆盖固体酸和碱催化剂。提出了一种新的表面凝胶法制备方法。这是一种将溶解在乙酸乙酯中的金属醇盐在金属氧化物或氢氧化物表面利用其酸碱性质进行分解的技术。采用表面凝胶化技术制备了MOx/MgO （M=Al, Si, Ti, Zr）和M' ox /CaO （M'=Al, Si, Ti）。在所合成的固体碱催化剂中，Al_2O_3/MgO、Al_2O_3/CaO和TiO_2/CaO对二丙酮醇的反醛醇反应具有较高的催化活性。单次沉积过程中覆盖SiO2不会影响CaO的溶解度。双重沉积法对Ca^<2+>的洗脱有较强的抑制作用。通过表面凝胶作用，在氧化锆表面覆盖氧化锆，抑制了与氧化锆表面结合的硫酸盐离子的洗脱。然而，没有观察到抑制作用。催化活性大大提高。

项目成果

Synthesis of a water tolerant solid base of CaO covered with Al_2O_3

Al_2O_3包覆CaO耐水固体基质的合成

• 发表时间: 2010
• 期刊: Catalysis Today
• 影响因子: 5.3
• 作者: H.Matsuhashi;T.Fujita
• 通讯作者: T.Fujita

シリカ被覆CaOの調製と塩基触媒性質

二氧化硅包覆CaO的制备及其碱催化性能

• 发表时间: 2010
• 作者: H.Matsuhashi;T.Fujita;B. Kamiouji;川村安乃,松橋博美;K.Hashimoto;船木大地,松橋博美;松橋博美,川村安乃
• 通讯作者: 松橋博美,川村安乃

Al_2O_3で修飾したMgOの塩基触媒特性

Al_2O_3改性MgO的碱催化性能

• 发表时间: 2008
• 作者: Y. Kaneno;T. Takasugi;H. Tsuda;Y. Xu;M. Demura;T. Hirano;H. Iwai;望月友貴・菅原勝康;宮本徹;松橋博美
• 通讯作者: 松橋博美

アルミナで被覆したMgOの塩基点の構造

氧化铝包覆MgO基体结构

• 发表时间: 2009
• 作者: 松橋博美

Al_2O_3で被覆したMgOによるアセトンのアルドール反応

丙酮与Al_2O_3包覆MgO的羟醛反应

• 发表时间: 2009
• 作者: J.H. Jang;Y. Xu;D.H. Chun;M. Demura;D.M. Wee;T. Hirano;伊藤史也,松橋博美
• 通讯作者: 伊藤史也,松橋博美