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US 12,590,251 B2Granted
Controlling mesophase softening point and production yield by varying solvent SBN via solvent deasphalting
AssigneeExxonMobil Chemical Patents Inc.
InventorsYifei Liu, Teng Xu, Stephen T. Cohn, Jeffrey C. Yeh
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Abstract
A process for producing mesophase pitch, the process including: contacting an isotropic pitch with a solvent under conditions sufficient to produce a solvent fraction comprising the solvent and an insoluble fraction comprising mesophase pitch; and recovering the mesophase pitch, wherein the contacting includes the solvent having a Solubility Blending number (SBN) that causes the mesophase pitch to have a softening point ranging from 270° C. to 350° C., as measured in accordance with ASTM D3104-14.
Claims11
A process for producing mesophase pitch, the process comprising:
- contacting an isotropic pitch with a solvent under conditions sufficient to produce a solvent fraction comprising the solvent and an insoluble fraction comprising mesophase pitch;
- recovering the mesophase pitch,
- wherein the contacting includes the solvent having a Solubility Blending number (SBN) that causes the mesophase pitch to have a softening point ranging from 270° C. to 350°, as measured in accordance with ASTM D3104-14, wherein the solvent comprises a first solvent that is a nonpolar solvent of asphaltenes and a second solvent that is a nonpolar nonsolvent of asphaltenes;
- and
- controlling a ratio of the first solvent to the second solvent based on the softening point of the mesophase pitch.
2 more elements
Dependencies are inferred from the claim text.