Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases p. 99 - 110 (1984)
Update date:2022-08-23
Topics:
Ghosh, Ashim K.
Curthoys, Geoffrey
Characterization of the acidity of an HY and a number of mordenite zeolites (SiO2/Al2O3 ratios 8-26) has been studied by infrared spectroscopy using ammonia, methylamine and n-butylamine.The characteristic bands of adsorbed ammonia appeared at 1445 cm-1 (Bronsted type) and 1623 cm-1 (Lewis type), with the disappearance of the acidic OH band at 3609 cm-1 for mordenites and of the acidic OH bands at 3643 and 3568 cm-1 for HY.When methylamine and n-butylamine were adsorbed on the catalysts the acidic hydroxyls were found to be accessible to the amines and a band of δsym(NH3(1+))(RNH2 adsorbed on a Bronsted site) appeared in the 1500-1540 cm-1 region with a band at ca. 1610 cm-1, which is a combination of RNH2 on Lewis sites and δasym(NH3(1+)).Bronsted acidity of the catalysts as determined from the band intensities of the adsorbed ammonia, methylamine and n-butylamine, although not in numerical agreement, showed the same trend.The alkylamines were decomposed into alkenes at elevated temperatures and the decomposition was prominent in the case of n-butylamine.
View MoreContact:0086-29-89196322
Address:North of the Fifth Keji Road, Hi-Tech Industrial Zone, Xi'an City, Shaanxi Province, China
Contact:886 2 2541 0022
Address:8 Fl., No. 11, Sec. 1, Chung Shan North Rd., Taipei, Taiwan R.O.C.
Chengdu ZY Biochemical Technology Co., LTD
Contact:0086-28-88680086
Address:170 Qingpu Road, Shouan Town, Pujiang County
website:http://www.china-sinoway.com
Contact:+86-592-5853819
Address:16/F,Huicheng Comm,Complex,No839 XiaHe Rd, Xiamen,China
Suzhou SuKaiLu Chemical Technology Co., Ltd.
Contact:+86-512-62766020
Address:Floor 4, Building 1, Xinyi Pharmaceutical Valley Wisdom Industrial Park, 415 Changyang Street, Suzhou Industrial Park, Jiangsu Province
Doi:10.1021/jo01028a005
(1964)Doi:10.1080/00397911.2011.642923
(2013)Doi:10.1016/S1383-5718(01)00142-5
(2001)Doi:10.1021/ja511796h
(2015)Doi:10.1016/j.bmc.2015.03.037
(2015)Doi:10.1039/b618712a
(2007)
