<p>A technology has been developed for the production of chitin and chitosan based on local raw materials, waste from the silk industry (Bombyx mori silkworm pupae) with various physicochemical properties. The optimal conditions for the synthesis of natural polysaccharides were selected taking into account the adjustment of the production line. The composition of chitosan samples was established. The degree of deacetylation was determined from 87 to 91%, the molecular weight from 60 kDa to 160 kDa, and the humidity 8-10%. The structure of the obtained biopolymers is confirmed by IR spectroscopy and elemental analysis in comparison with published data.</p>