Abstract: A method is provided for extraction of fine silk fibroin powder from Bombyx mori silk cocoons. The conventional method of silk processing includes dissolution of the degummed silk fibers in some strong salt solutions followed by a dialysis step. The earlier reported strong salt solutions have either associated environment issues or lower dissolution ability for silk. However, the provided method includes degumming silk cocoons, drying and cutting the degummed silk fibers, mixing the fibers with an ionic liquid, stirring the mixture, regeneration of silk from the mixture with the help of an anti-solvent followed by centrifugation, drying the precipitated silk and finally obtaining a fine powder of silk.

Abstract: A method is provided for extraction of fine silk fibroin powder from Bombyx mori silk cocoons. The conventional method of silk processing includes dissolution of the degummed silk fibers in some strong salt solutions followed by a dialysis step. The earlier reported strong salt solutions have either associated environment issues or lower dissolution ability for silk. However, the provided method includes degumming silk cocoons, drying and cutting the degummed silk fibers, mixing the fibers with an ionic liquid, stirring the mixture, regeneration of silk from the mixture with the help of an anti-solvent followed by centrifugation, drying the precipitated silk and finally obtaining a fine powder of silk.

Abstract: An exemplary embodiment presents a method of lignin extraction from lignocellulosic biomass. Lignin is a rich and economical source of various valuable products. It is a platform chemical for renewable biofuels, composite materials, biofilms etc. Delignification of lignocellulosic biomass affords cellulose-rich material as an additional product that is already known for many applications like bioethanol and other chemicals. The method includes grinding the lignocellulosic biomass, mixing the dried lignocellulosic biomass powder with ionic liquid, stirring and heating of the mixture followed by solvent extraction of lignin from the mixture.

Abstract: An exemplary embodiment provides a method for extracting hydroxyapatite. The method includes washing fish scales with water, drying the washed fish scales, grinding the washed fish scales, mixing the ground fish scales with an ionic liquid, and centrifuging the mixture of the ground fish scales and the ionic liquid to collect a hydroxyapatite powder as a precipitate.

Abstract: An exemplary embodiment provides a method for extracting hydroxyapatite. The method includes washing fish scales with water, drying the washed fish scales, grinding the washed fish scales, mixing the ground fish scales with an ionic liquid, and centrifuging the mixture of the ground fish scales and the ionic liquid to collect a hydroxyapatite powder as a precipitate.