Extraction method for silk protein from silk waste of carpet

This method uses waste fibres and leftovers of floor carpet as raw material to produce a top quality mater-soluble protein. The process is simple, low cost, without waste-water. It is characterized by that it uses kbarium hydroxide which is the lowest solubility base as neutralizer, to hydrolyze the acid solution solved waste fibres, making it complete ppt. and easy to purifying, and filtering again via active carbon, decoloeization and purification are finished in one step and removing resideary heavy metal elements, making the product quality and purity kto be improved. This method can be easy extended and applied in the manufacturing floor carpet trade and daily chemical industry.