SYSTEM AND PROCESS FOR INCREASING A SOFTENING POINT OF ISOTROPIC PITCH
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United States of America Patent
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Issued Date -
Mar 27, 2025
app pub date -
Sep 25, 2023
filing date -
Sep 25, 2023
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Abstract
A process for increasing a softening point of isotropic pitch includes providing a hydrocarbon feed including isotropic pitch having a first softening point and mixing the hydrocarbon feed with a carrier gas such that a mixture of the hydrocarbon feed and the carrier gas establishes at least one chosen from an annular-mist flow regime and a mist flow regime. The annular-mist flow regime includes a liquid film layer and a dispersion of entrained droplets, and the mist flow regime includes a dispersion of entrained droplets. The mixture of the hydrocarbon feed and the carrier gas approaches a vapor-liquid equilibrium. The process also includes discharging an effluent of the mixture into a separation vessel and separating a vapor phase and a liquid phase in the separation vessel. The liquid phase includes isotropic pitch having a second softening point greater than the first softening point.
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