Oxidative desulfurization of dibenzothiophene based on air and cobalt phthalocyanine in an ionic liquid

Oxidative desulfurization of dibenzothiophene based on air and cobalt phthalocyanine in an ionic liquid

Type	Journal Article
Author	Juan Zhang
Author	Junpan Li
URL	http://pubs.rsc.org/en/content/articlelanding/2014/ra/c3ra43765e
Volume	4
Issue	7
Pages	3206-3210
Publication	RSC Advances
Date	2013-12-12
Abstract	After synthesis of cobalt phthalocyanines (CoPc(Cl)n) using a microwave method, researchers oxidized dibenzothiophene (DBT) with air as the oxidant and cobalt phthalocyanines (CoPc(Cl)n) as catalysts in an ionic liquid at room temperature and atmospheric conditions. The removal ratio of DBT reached 90.0% at room temperature after 2 h, with 0.3 wt% of CoPc(Cl)16 in an ionic liquid, and the ratio of the ionic liquid to the model oil was 1.8:1 at room temperature. The effect of the substituents on the cobalt phthalocyanines on their catalytic activities was investigated. Results reveal that the catalytic activity of cobalt phthalocyanines with different substituents increases in the order CoPc(Cl)4 < CoPc(Cl)8 < CoPc(Cl)12 < CoPc(Cl)16, indicating that electron-withdrawing group substituents have a positive effect on the catalytic properties.