ACIDIC AND CATALYTIC PROPERTIES OF NIOBIC ACID CRYSTALLIZED AT LOW-TEMPERATURE

Authors
GUO CX QIAN ZH
Citation
Cx. Guo et Zh. Qian, ACIDIC AND CATALYTIC PROPERTIES OF NIOBIC ACID CRYSTALLIZED AT LOW-TEMPERATURE, Catalysis today, 16(3-4), 1993, pp. 379-385
Citations number
16
Categorie Soggetti
Engineering, Chemical","Chemistry Applied","Chemistry Physical
Journal title
Catalysis today → ACNP
ISSN journal
09205861
Volume
16
Issue
3-4
Year of publication
1993
Pages
379 - 385
Database
ISI
SICI code
0920-5861(1993)16:3-4<379:AACPON>2.0.ZU;2-F
Abstract
Niobic acid was crystallized at 120-degrees-C for 48 h, which showed t he largest acid amounts at higher acid strengths. The crystallized nio bic acid calcined at 300-degrees-C was found to show higher activity t han uncrystallized niobic acid and niobic acid washed with water or tr eated with sulfuric acid or phosphoric acid for the dehydration of iso propanol and the esterification of ethanol with acetic acid.