Flash thermocracking of tar or pitch
AssigneeInstitute of Gas Technology
InventorsRichard A. Knight, Ronald H. Carty, Michael Onischak
Life of this patent
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Abstract
A process for producing high-quality pitches comprising atomizing a preheated feed material of carbonaceous tar and/or pitch, forming an aerosol, contacting the aerosol in a reaction vessel with a flowing, non-reactive gas atmosphere for less than about 10 seconds at a gas temperature of about 1400.degree. F. to about 2000.degree. F., and separating and recovering a liquid fraction of the liquid formed in the reaction vessel which remains in a liquid phase up to a distillation temperature of about 750.degree. F.
Claims8
A process for producing high quality pitches comprising:
- atomizing at least one of a preheated carbonaceous tar and a preheated carbonaceous pitch, forming an aerosol;
- contacting said aerosol in a reaction vessel with a flowing, non-reactive gas atmosphere for less than about ten seconds at a gas temperature of about 1400.degree. F. to about 2000.degree. F., forming a liquid;
- and
- recovering and separating a liquid fraction of said liquid which remains in a liquid phase up to a distillation temperature of about 750.degree. F., said liquid fraction comprising at least one high quality pitch.
A process for producing a high quality pitch having a non-mesophase QI content in the range of about 8 to 12 wt %, a TI in the range of about 26 to 32 wt %, a softening point in the range of about 190.degree. to 250.degree. F. (Ring & Ball), a coking value in the range of about 50 to 60 wt %, and a specific gravity greater than about 1.25, comprising:
- atomizing at least one of a preheated carbonaceous tar and a preheated carbonaceous pitch, forming an aerosol;
- contacting said aerosol in a reaction vessel with a flowing, non-reactive gas atmosphere for less than about ten seconds at a gas temperature of about 1400.degree. F. to about 2000.degree. F., forming a liquid;
- and
- recovering and separating a liquid fraction of said liquid which remains in a liquid phase up to a distillation temperature of about 750.degree. F., said liquid fraction comprising said high quality pitch.
Dependencies are inferred from the claim text.