Processes for Producing Mesophase Pitch

Processes are described for producing mesophase pitch. The processes generally comprise providing a feedstock having a T5 ≥400° F. (204° C.) and a T95 ≤1,400° F. (760° C.) and heating the feedstock at a temperature ranging from about 420° C. to about 520° C. to produce a heat treated product includi...

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Bibliographic Details
Main Authors Xu, Teng, Liu, Yifei, Cohn, Stephen T, Yeh, Jeffrey C
Format Patent
LanguageEnglish
Published 22.02.2024
Subjects
APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS
CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS
CHEMISTRY
FUELS
LUBRICANTS
METALLURGY
NATURAL OR ARTIFICIAL THREADS OR FIBRES
PEAT
PETROLEUM, GAS OR COKE INDUSTRIES
PYROLIGNEOUS ACID
SPINNING
TECHNICAL GASES CONTAINING CARBON MONOXIDE
TEXTILES
WORKING-UP PITCH, ASPHALT, BITUMEN, TAR
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Summary:Processes are described for producing mesophase pitch. The processes generally comprise providing a feedstock having a T5 ≥400° F. (204° C.) and a T95 ≤1,400° F. (760° C.) and heating the feedstock at a temperature ranging from about 420° C. to about 520° C. to produce a heat treated product including isotropic pitch. Generally, the heating is conducted under conditions sufficient to satisfy the relationship [X*Y]≥20,000 seconds, wherein X is the equivalent reaction time of the heating, and wherein Y is the bromine number of the feedstock as measured in accordance with ASTM D1159. The processes generally further comprise contacting the isotropic pitch with a solvent having a Solubility Blending number (SBN) of at least about 10 SU under conditions sufficient to produce a solvent fraction comprising the solvent and an insoluble fraction comprising mesophase pitch, and recovering the mesophase pitch.
Bibliography:Application Number: US202218260761