SciELO - Scientific Electronic Library Online

 
vol.31 issue3Influence of digestion method and sample mass on the recovery of nutrients in organic residuesSafe shelf life of single-base propellants author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Química Nova

Print version ISSN 0100-4042On-line version ISSN 1678-7064

Abstract

PINTO, Angelo C.; OLIVEIRA, Cristiano Honório de  and  RIBEIRO, Núbia Moura. The effect of microwave irradiation on the crystalline structure and catalytic activity of clays. Quím. Nova [online]. 2008, vol.31, n.3, pp.562-568. ISSN 0100-4042.  https://doi.org/10.1590/S0100-40422008000300019.

The effect of microwave (MW) irradiation on the crystalline structure of two natural clays and one commercial clay, Montmorillonite K10, was analyzed comparing the X-ray diffraction, N2 isotherms, NMR-MAS of 27Al and 29Si spectra of the clays before and after MW irradiation. The preparation of dioxolane ketals of isatin was used to analyze the MW effect on the catalyst activation. The yields achieved using catalysts activated by MW irradiation were lower (2 to 5%) than the yields achieved using catalysts activated by heat in a conventional oven.

Keywords : clays; microwave; catalysis.

        · text in Portuguese     · Portuguese ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License