In an attempt to find out what is happening during the chemical treatments of some agricultural residues (rice straw), as well as to link the theoretical aspects and the practical side, in an attempt to explain those changes that occur and thus control the quality and derivatives of the products of these treatment. Although theoretical studying cellulosic wastes, but this aspect of the studies and research has not obtained right after. The idea of this research on the essential elements, namely the first CAChe Program computer to design and expected IR behaviour for these materials, the second is what happened in the experimental treatments