US 11,655,418 B1
Ultra purified pitch process
Thomas C Holcombe, Hillsborough, NJ (US); David C Boyer, Palm Coast, FL (US); and Richard D Stone, New Orleans, LA (US)
Assigned to ACP TECHNOLOGIES, LLC, St. Clair Shores, MI (US)
Filed by Thomas C Holcombe, Hillsborough, NJ (US); David C Boyer, Palm Coast, FL (US); and Richard D Stone, New Orleans, LA (US)
Filed on Jul. 29, 2021, as Appl. No. 17/389,071.
Claims priority of provisional application 62/706,141, filed on Aug. 3, 2020.
Int. Cl. C10C 1/19 (2006.01); C10C 3/06 (2006.01); C10C 3/00 (2006.01)
CPC C10C 3/06 (2013.01) [C10C 3/002 (2013.01)] 19 Claims
 
1. A process for producing a reduced contaminant content pitch product from a contaminated multi-ring aromatic liquid fresh feed containing solid contaminants comprising:
a) Charging said contaminated fresh feed comprising multi-ring aromatics to a pitch forming reactor operating at pitch forming reaction conditions including a pitch forming temperature and pressure and converting said contaminated feed into at least one of isotropic pitch and mesophase pitch and unconverted or partially converted contaminated feed,
b) Discharging from said reactor a reactor effluent comprising a two phase mixture of liquid pitch and a vapor phase comprising unconverted and partially converted feed into a vapor liquid separation means,
c) Separating said two phase mixture in said vapor liquid separation means into a pitch rich liquid phase with an increased contaminant content relative to said contaminated feed and a vaporization purified vapor phase fraction with a reduced or eliminated contaminant content
d) Cooling, condensing, and recovering at least a portion of said vaporization purified vapor phase fraction as a vaporization purified multi-ring aromatic intermediate product and
e) At least periodically charging said vaporization purified intermediate to a pitch forming reactor and converting therein at least a portion of said purified intermediate to an ultra-purified isotropic or mesophase pitch with a reduced solids content as compared to said contaminated feed, and
f) Recovering said ultra-purified isotropic or mesophase pitch as a product of the process.