METHOD OF PRODUCING CARBON GRAPHITIZED FIBROUS MATERIALS Russian patent published in 2019 - IPC D01F9/12 D01F9/16 

FIELD: chemistry.

SUBSTANCE: invention relates to chemical engineering, mainly, to artificial fibers and can be used in production of carbon fibrous materials at high processing temperature. Method of producing carbon graphitised fibrous materials includes heating material during continuous transportation in isolated from each other reaction zones – low-temperature with heating to 450 °C and high-temperature heating to 3,000 °C, and removing from the high-temperature reaction zone in the opposite direction material transportation of released volatile products through the input end of the transport channel. High-temperature treatment involves partially carbonized carbon fiber material with carbonization degree of 0.45–0.60, carbon content of 65–72 wt% and hydrogen of 4.1–4.4 wt%. Volatile products removed from the reaction zone are ignited, and partially carbonised material is subjected to gas-flame treatment in the flame of combustion of volatile products before introduction into the transport channel. Providing graphitized fibrous material with improved physical and mechanical properties.

EFFECT: breaking strength of obtained graphitized fibrous materials is not less than 800–1,000 MPa, modulus of elasticity is not less than 3,000 MPa.

4 cl, 8 dwg