A method for the separation of lignine and derivatives thereof from a solid acidose solution of slaughter. (Machine-translation by Google Translate, not legally binding)

摘要

A method for the separation of lignin and derivatives thereof from an aqueous solution of spent liquor formed by reaction in aqueous medium at high temperature of a lignocellulosic material with an alkaline pulp reduction liquor, which reacts with said material to form soap of tall oil of fatty acids and resins, method comprising: separating the spent aqueous solution from bleach and concentrating until the soap content of tall oil is separated, separating the tall oil soap from said bleach and passing a stream of carbon dioxide and water vapor through the remaining spent aqueous liquor solution, thereby causing the lignin and its derivatives to form a first insoluble precipitate, separating said precipitate by filtration from the remainder of the aqueous solution and subjecting the remaining solution to heating in the absence of additional reagents, at a temperature comprised between about 25 4ºC and about 371ºC at a pressure comprised between about 71 and about 246 kg/cm for a period of time between about 10 minutes and 3 hours, thereby separating an additional portion of said valuable amounts of organic chemicals from said solution water, in the form of a second solid precipitate and an additional portion is released in the form of vapor. (Machine-translation by Google Translate, not legally binding)