US 11,807,537 B2
Methods for producing carbon fiber from coal
Charles Agee Atkins, Sheridan, WY (US); Garrett W. Lindemann, Buffalo, WY (US); and Matthew Targett, Sheridan, WY (US)
Assigned to CARBON HOLDINGS INTELLECTUAL PROPERTIES, LLC, Ranchester, WY (US)
Filed by CARBON HOLDINGS INTELLECTUAL PROPERTIES, LLC, Sheridan, WY (US)
Filed on Aug. 9, 2021, as Appl. No. 17/397,872.
Application 17/397,872 is a continuation of application No. 16/230,502, filed on Dec. 21, 2018, granted, now 11,104,581, issued on Aug. 31, 2021.
Claims priority of provisional application 62/610,037, filed on Dec. 22, 2017.
Prior Publication US 2021/0363018 A1, Nov. 25, 2021
Int. Cl. C01B 32/336 (2017.01); C01B 32/184 (2017.01); C01B 32/50 (2017.01); C01B 32/30 (2017.01); C01B 32/182 (2017.01); C01B 32/158 (2017.01); C01B 32/205 (2017.01); C08F 6/28 (2006.01); C08F 10/02 (2006.01); C08F 20/44 (2006.01); C10G 1/00 (2006.01); C10G 1/02 (2006.01); C01B 3/02 (2006.01); G01N 33/22 (2006.01); C10C 3/00 (2006.01); D01F 9/12 (2006.01); C01B 32/20 (2017.01); C10B 53/04 (2006.01); C01B 32/05 (2017.01); C01B 32/154 (2017.01); C01B 32/16 (2017.01); C10B 53/00 (2006.01); C10B 57/08 (2006.01); D01F 9/15 (2006.01); C08F 10/06 (2006.01); C10G 1/04 (2006.01); C10G 17/02 (2006.01); C10G 27/12 (2006.01)
CPC C01B 32/336 (2017.08) [C01B 3/02 (2013.01); C01B 32/05 (2017.08); C01B 32/154 (2017.08); C01B 32/158 (2017.08); C01B 32/16 (2017.08); C01B 32/182 (2017.08); C01B 32/184 (2017.08); C01B 32/20 (2017.08); C01B 32/205 (2017.08); C01B 32/30 (2017.08); C01B 32/50 (2017.08); C08F 6/28 (2013.01); C08F 10/02 (2013.01); C08F 10/06 (2013.01); C08F 20/44 (2013.01); C10B 53/00 (2013.01); C10B 53/04 (2013.01); C10B 57/08 (2013.01); C10C 3/00 (2013.01); C10C 3/002 (2013.01); C10G 1/002 (2013.01); C10G 1/02 (2013.01); C10G 1/04 (2013.01); D01F 9/12 (2013.01); D01F 9/15 (2013.01); G01N 33/222 (2013.01); C10G 17/02 (2013.01); C10G 27/12 (2013.01); D10B 2101/12 (2013.01)] 18 Claims
 
1. A method of producing carbon fiber, comprising:
providing an amount of raw coal, the raw coal selected based on at least one of a destructive or non-destructive chemical analyzation technique, the raw coal including an impurity therein and having an initial hydrogen to carbon ratio greater than 0.7;
beneficiating the amount of raw coal to selectively remove at least some of the impurity comprising heteroatoms to form beneficiated coal;
processing the beneficiated coal to produce a pitch; and
modifying at least some of the pitch to produce the carbon fiber;
wherein the carbon fiber includes a selected amount of a remainder of the impurity.