# US 2014/0190818 A1 · Method for Stabilizing Carbon-Containing Fibre and Method for Producing Carbon Fibre > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0190818 A1 - Document ID: US20140190818A1 - Status: Published application - Kind: A1 - Application number: 14/202,871 - Filed: 2014-03-10 - Published: 2014-07-10 - Earliest claimed: 2009-07-28 - Inventors: Marina Vladimirovna Soboleva; Vitaliy Viktorovich Usov; Vladislav Vasilievich Shmyrev - Web page: https://patentgrep.com/patent/US20140190818A1 ## CPC - C01B 32/05: Preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30 - C04B 35/62873: {Carbon} - D01D 10/00: Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected (finishing D02J) - D01F 9/14: by decomposition of organic filaments - D01F 9/16: from products of vegetable origin or derivatives thereof, e.g. from cellulose acetate (D01F9/18 takes precedence) - D01F 9/225: {from stabilised polyacrylonitriles} - D06M 10/003: {Treatment with radio-waves or microwaves} - C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C} - C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE - D01D: MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS - D01F: CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS - D06M: TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS ## Abstract The group of inventions pertains to the field of producing high-strength carbon fibres, which can be primarily manufactured from an organic starting material (precursor). A method for stabilizing a carbon-containing fibre (precursor) is claimed, in which the fibre is placed into a gaseous medium and subjected to treatment with microwave radiation as the gaseous medium is heated. More specifically, the fibre is placed into a working chamber filled with a gaseous medium, the latter is heated by heating the chamber (for example, the walls thereof) while the fibre is treated with microwave radiation. According to a second aspect of the invention, a method for producing a carbon fibre is claimed, comprising, as a minimum, fibre stabilizing and carbonizing stages, in which the precursor is stabilized by means of the above-described method by subjecting the fibre to microwave radiation as the medium in which the fibre is immersed is heated. After the fibre has been carbonized, it is possible, as an alternative, for said fibre to be additionally coated with graphite. If necessary, the stabilized fibre can also be carbonized and/or coated with graphite by the complex treatment thereof with microwave radiation as the medium in which the fibre has been placed for carbonizing/coating with graphite is heated. As a result, the time taken to stabilize the precursor fibres is reduced, thereby affording a reduction in the energy consumption and an increase in the productivity of the process for producing carbon fibre. ## Claims ### Claim at position 1 1-11. (canceled) ### Claim 12 A method for stabilizing carbon-containing fiber comprising the steps of placing the fiber into a gaseous medium and subjecting said fiber to treatment with microwave radiation while concurrently heating said gaseous medium. ### Claim 13 (depends on 12) A method according to claim 12, wherein the gaseous medium is contained with an apparatus, and wherein the step of heating the gaseous medium comprises heating the apparatus as the fiber is exposed to microwave irradiation. ### Claim 14 (depends on 13) A method according to claim 13, wherein the apparatus walls are heated to a temperature in the range of about 50° C. to about 500° C. ### Claim 15 (depends on 14) A method according to claim 14, wherein the apparatus walls are heated to a temperature in the range of about 100° C. to about 300° C. ### Claim 16 (depends on 12) A method according to claim 12, further comprising the step of immersing the fiber in oxidizing oxygen-containing medium. ### Claim 17 (depends on 12) A method according to claim 12, wherein the microwave radiation employed to stabilize the fiber is at least about 10 Wt. ### Claim 18 (depends on 12) A method of carbon fiber manufacture comprising the steps of stabilizing a carbon-containing fiber according to claim 12, followed by carbonizing said carbon-containing fiber. ### Claim 19 (depends on 13) A method of carbon fiber manufacture comprising the steps of stabilizing a carbon-containing fiber according to claim 13, followed by carbonizing said carbon-containing fiber. ### Claim 20 (depends on 14) A method of carbon fiber manufacture comprising the steps of stabilizing a carbon-containing fiber according to claim 14, followed by carbonizing said carbon-containing fiber. ### Claim 21 (depends on 15) A method of carbon fiber manufacture comprising the steps of stabilizing a carbon-containing fiber according to claim 15, followed by carbonizing said carbon-containing fiber. ### Claim 22 (depends on 16) A method of carbon fiber manufacture comprising the steps of stabilizing a carbon-containing fiber according to claim 16, followed by carbonizing said carbon-containing fiber. ### Claim 23 (depends on 17) A method of carbon fiber manufacture comprising the steps of stabilizing a carbon-containing fiber according to claim 17, followed by carbonizing said carbon-containing fiber. ### Claim 24 (depends on 18) A method according to claim 18, wherein the carbonizing step comprises the steps of placing the stabilized carbon-containing fiber into a gaseous blanketing medium and subjecting said stabilized carbon-containing fiber to treatment with microwave radiation while concurrently heating said gaseous blanketing medium. ### Claim 25 (depends on 19) A method according to claim 19, wherein the carbonizing step comprises the steps of placing the stabilized carbon-containing fiber into a gaseous blanketing medium and subjecting said stabilized carbon-containing fiber to treatment with microwave radiation while concurrently heating said gaseous blanketing medium. ### Claim 26 (depends on 20) A method according to claim 20, wherein the carbonizing step comprises the steps of placing the stabilized carbon-containing fiber into a gaseous blanketing medium and subjecting said stabilized carbon-containing fiber to treatment with microwave radiation while concurrently heating said gaseous blanketing medium. ### Claim 27 (depends on 21) A method according to claim 21, wherein the carbonizing step comprises the steps of placing the stabilized carbon-containing fiber into a gaseous blanketing medium and subjecting said stabilized carbon-containing fiber to treatment with microwave radiation while concurrently heating said gaseous blanketing medium. ### Claim 28 (depends on 22) A method according to claim 22, wherein the carbonizing step comprises the steps of placing the stabilized carbon-containing fiber into a gaseous blanketing medium and subjecting said stabilized carbon-containing fiber to treatment with microwave radiation while concurrently heating said gaseous blanketing medium. ### Claim 29 (depends on 23) A method according to claim 23, wherein the carbonizing step comprises the steps of placing the stabilized carbon-containing fiber into a gaseous blanketing medium and subjecting said stabilized carbon-containing fiber to treatment with microwave radiation while concurrently heating said gaseous blanketing medium. ### Claim 30 (depends on 18) A method according to claim 18, further comprising the step of graphitizing the carbonized the carbon-containing fiber. ### Claim 31 (depends on 19) A method according to claim 19, further comprising the step of graphitizing the carbonized the carbon-containing fiber. ### Claim 32 (depends on 20) A method according to claim 20, further comprising the step of graphitizing the carbonized the carbon-containing fiber. ### Claim 33 (depends on 21) A method according to claim 21, further comprising the step of graphitizing the carbonized the carbon-containing fiber. ### Claim 34 (depends on 22) A method according to claim 22, further comprising the step of graphitizing the carbonized the carbon-containing fiber. ### Claim 35 (depends on 23) A method according to claim 23, further comprising the step of graphitizing the carbonized the carbon-containing fiber. ### Claim 36 (depends on 30) A method according to claim 30, further comprising exposing said carbonized fiber to microwave radiation inside heated inert atmosphere during the graphitizing step. ### Claim 37 (depends on 31) A method according to claim 31, further comprising exposing said carbonized fiber to microwave radiation inside heated inert atmosphere during the graphitizing step. ### Claim 38 (depends on 32) A method according to claim 32, further comprising exposing said carbonized fiber to microwave radiation inside heated inert atmosphere during the graphitizing step. ### Claim 39 (depends on 33) A method according to claim 33, further comprising exposing said carbonized fiber to microwave radiation inside heated inert atmosphere during the graphitizing step. ### Claim 40 (depends on 34) A method according to claim 34, further comprising exposing said carbonized fiber to microwave radiation inside heated inert atmosphere during the graphitizing step. ### Claim 41 (depends on 35) A method according to claim 35, further comprising exposing said carbonized fiber to microwave radiation inside heated inert atmosphere during the graphitizing step.