METHOD OF MANUFACTURE OF LIGNIN-CONTAINING PREDIMINARY FIBER, AND ALSO OF CARBON FIBERS Russian patent published in 2017 - IPC D01F2/00 D01F9/17 D01D5/06 

FIELD: chemistry.

SUBSTANCE: invention relates to a process for the production of lignin-containing precursor fibers for production of carbon fibers and/or activated carbon fibers, wherein: a) a solution containing at least one kind of lignin, as well as at least one fiber-forming polymer selected from the group consisting of cellulose or cellulose derivatives, at least one solvent selected from the group consisting of tertiary amine and/or ionic liquids b) transferred into a coagulation bath after extrusion of the solution spinning spinneret wet spinning method from a solution or spinning with an air gap, precipitating lignin precursor c) is stretched lignin precursor, at least 1.1 times, at a temperature of at least 60°C, wherein lignin thread is an economical starting material for the production of activated carbon and carbon fibers. The invention also relates to a method for manufacturing carbon fiber.

EFFECT: increased productivity.

15 cl, 4 ex