Leading academic institutions, governments, and funders of research across the world have spent the last few decades fretting publicly about the need for scientists and research organisations to engage more widely with the public and be open about their research. While a global literature asserts that public communication has changed from a virtue to a duty for scientists in many countries and disciplines, our ...
A bentonite collected at Serra de Dentro, Porto Santo Island, Portugal was selected as the starting material for the preparation of acid activated clay catalysts. These materials were prepared using a range of different HCl concentrations, contact times and temperatures. The materials obtained were characterized in terms of chemical composition (XRF), structure (XRD and IR spectroscopy), textural properties (ad...
Nesta comunicação foram estudadas esmectites tratadas com ácido clorídrico, para a sua utilização como catalisadores de reacções orgânicas em fase líquida, nomeadamente a oxidação do limoneno com vista à formação do p-cimeno. O tratamento ácido visa produzir dois efeitos nas argilas: aumentar a sua área superficial, por delapidação dos folhetos octaédricos, e substituir os catiões permutáveis por protões, aumen...