Catalysis science and technology p. 2618 - 2625 (2014)
Update date:2022-08-16
Topics:
Zhao, Shen
Jia, Yueqing
Song, Yu-Fei
H4[SiW12O40] (H-SiW12) is demonstrated to be able to efficiently catalyze the acetalization of aldehydes and ketones with ethylene glycol and 1,3-propanediol. Nevertheless, the possible leaching and the recycling of H-SiW12 are two major disadvantages that largely restrict its further application in industry. Moreover, H 4[SiW12O40] tends to deactivate strong proton sites due to the small surface area of 10 m2 g-1. Due to interactions with surface silanol groups, the proton sites of polyoxometalates (POMs) on SiO2 are less susceptible to deactivation. As such, immobilization of H4[SiW12O40] onto SiO 2 leads to the heterogeneous catalyst H4[SiW 12O40]/SiO2 (H-SiW12/SiO 2), which can catalyze the acetalization of aldehydes and ketones with ethylene glycol and 1,3-propanediol selectively and efficiently without the need of a drying agent. The acetalization process can proceed smoothly at a relatively low temperature under solvent-free conditions. The catalyst of H 4[SiW12O40]/SiO2 can be recycled at least ten times without an obvious decrease in its catalytic activity. As far as we know, the TONs of the H-SiW12/SiO2-catalyzed acetalization of cyclohexanone with ethylene glycol, and benzaldehyde with 1,3-propanediol are the highest reported so far.
View MoreChina Synchem Technology Co.,Ltd
website:http://www.cnsynchem.com
Contact:+86-0552-4929311
Address:No.217 Daqing Road
Hebei Tianxiang Biological & Pharmaceutical Co., Ltd
Contact:86-0312-6615158
Address:No 42 fazhan street qingyuan county
Hangzhou Taiyan Trading Co., Ltd
Contact:+86-13777583958
Address:NO.63, Xingyi Street, Xihu District, Hangzhou, Zhejiang, China
Hubei Xinghuo Chemical Co., Ltd.,
Contact:13925817279 13907299441
Address:Xinghuo Fine Chemistry Industrial Park, Xiaochang County, Hubei Province, China
Shandong Hongxiang Zinc Co., Ltd
Contact:086-0311-66187879
Address:DaWang developing zone
Doi:10.1016/S0025-5408(01)00488-3
(2001)Doi:10.1055/s-2001-9700
(2001)Doi:10.1055/s-2002-34385
(2002)Doi:10.1016/j.tetlet.2006.06.106
(2006)Doi:10.1021/jacs.7b06019
(2017)Doi:10.1021/ja00271a053
(1986)