Patent ID: 11912941
Assignee: CARBON HOLDINGS INTELLECTUAL PROPERTIES, LLC
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 0:
1. A system for forming high carbon-containing coal tar pitch from raw coal, comprising:
a slurry mix tank, wherein a solvent extraction process is configured to separate components of the raw coal by relative solubility of components of the raw coal to form an isotropic pitch and remove phenolic impurities;
a twin screw device with co-rotating screws;
the co-rotating screws including catalyst metals that retain catalytic activity when sulfided, wherein the system further comprises an inert gas environment at the inlet of the twin screw device and at an outlet of the twin screw device; and
an extrusion die disposed at an outlet of the twin screw device the inert gas environment included at an outlet of the extrusion die, wherein an extruded pitch remains in the inert gas environment as the extruded pitch cools to at least below 200° C.