Selective Chemical Conversion of Sugars in Aqueous Solutions without Alkali to Lactic Acid Over a Zn-Sn-Beta Lewis Acid-Base Catalyst

被引：107

作者：

Dong, Wenjie ^{[1
]}

Shen, Zheng ^{[1
]}

Peng, Boyu ^{[1
]}

Gu, Minyan ^{[1
]}

Zhou, Xuefei ^{[1
]}

Xiang, Bo ^{[2
]}

Zhang, Yalei ^{[1
]}

机构：

[1] Tongji Univ, State Key Lab Pollut Control & Resources Reuse, Key Lab Yangtze River Water Environm,Minist Educ, Natl Engn Res Ctr Facil Agr,Coll Environm Sci & E, Shanghai 200092, Peoples R China

[2] Tongji Univ, Dept Chem, Shanghai 200092, Peoples R China

来源：

SCIENTIFIC REPORTS | 2016年 / 6卷

基金：

中国国家自然科学基金;

关键词：

T-ATOM SITES; METHYL LACTATE; ZEOLITE; CELLULOSE; BIOMASS; TRANSFORMATIONS;

D O I：

10.1038/srep26713

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Lactic acid is an important platform molecule in the synthesis of a wide range of chemicals. However, in aqueous solutions without alkali, its efficient preparation via the direct catalysis of sugars is hindered by a side dehydration reaction to 5-hydroxymethylfurfural due to Bronsted acid, which originates from organic acids. Herein, we report that a previously unappreciated combination of common two metal mixed catalyst (Zn-Sn-Beta) prepared via solid-state ion exchange synergistically promoted this reaction. In water without a base, a conversion exceeding 99% for sucrose with a lactic acid yield of 54% was achieved within 2 hours at 190 degrees C under ambient air pressure. Studies of the acid and base properties of the Zn-Sn-Beta zeolite suggest that the introduction of Zn into the Sn-Beta zeolite sequentially enhanced both the Lewis acid and base sites, and the base sites inhibited a series of side reactions related to fructose dehydration to 5-hydroxymethylfurfural and its subsequent decomposition.

引用

页数：8

共 30 条

[1] Introduction of Co into the Vacant T-Atom Sites of SiBEA Zeolite as Isolated Mononuclear Co Species [J].