Montedison S.p.a.

Ausimont S.p.a.

Giulio Calmanti

Fulvio Burzio

Salvatore Gafa

Giovanni M Dadea

Alfonso Gatti

Fausto Marzolini

Gianpiero Sacchi

A process for delignifying raw cellulose which comprises a preliminary treatment for impregnating raw cellulose with a monopersulphuric acid solution, a successive filtration without washing with recycle of the filtered liquid to the first step, and a treatment, at low temperature and in alkaline solution at a pH higher than 9, of the previously impregnated raw cellulose in order to permit the reaction of the monopersulphuric acid with the lignin contained in the raw cellulose.

Process for delignifying raw cellulosic material impregnated with

A printed waste paper de-inking composition for use in the 'washing' process is disclosed containing:

Composition for the de-inking of printed waste paper by the washing

A de-inking composition is disclosed consisting substantially of:

Process for the de-inking of printed waste paper

Growing community of inventors

Milan, Italy

Giulio Calmanti