Methods and systems for processing cellulose-containing materials and isolating cellulose molecules; methods for regenerating cellulosic fibers

This invention describes a way to process materials like old clothes or plant waste to extract pure cellulose. It involves first washing the raw material in hot, pressurized water, potentially with added chemicals, then pulping it to isolate the cellulose. These isolated cellulose molecules can then be spun into new fibers for textiles and other uses.