this increases in the case of cotton linters. The peak around 22.68 in the curves is ascribed to the typical crystal lattice of cellulose Ib(Li and Renneckar, 2011; Nishino et al., 2011; Siqueira et al., 2010), indicating that all samples exhibit the diffuse characteristics pattern of an amorphous phase. The diffraction peak at 22.68of (002) reflection is sharper and narrower in the pro-duced CA; this indicates the removal of lignin and hemi-cellulose and results in an increase in the degree of crystallinity and a higher tensile strength (Montane et al., 1998). A shoulder peak at 16.49 of (101) reflection and a weak peak at 34.5of (040) reflection appear in the spectrum of the produced CA; these are assigned to the cellulose phase. The weak diffraction peak appears around 14.6in the diffrac-tion pattern of CA in the two samples; these could be indexed with the crystalline peaks of CTAII modification (Sun and Sun, 2002).