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US 9,162,955 B2Granted
Process for pyrolysis of a coal feed
AssigneeUop LLC
InventorsPaul T. Barger, Maureen L. Bricker, Joseph A. Kocal, Matthew Lippmann, Kurt M. Vanden Bussche
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Abstract
A process for pyrolyzing a coal feed is described. A coal feed is pyrolyzed into a coal tar stream and a coke stream in a pyrolysis zone. The coal tar stream is separated into at least a pitch stream comprising aromatic hydrocarbons. The pitch stream is reacted in a reaction zone to add at least one functional group to an aromatic ring of the aromatic hydrocarbons in the pitch stream. The functionalized pitch stream is recycled to the pyrolysis zone.
Claims19
A process comprising:
- pyrolyzing a coal feed into a coal tar stream and a coke stream in a pyrolysis zone;
- fractionating the coal tar stream into at least a pitch stream comprising aromatic hydrocarbons;
- reacting the pitch stream in a reaction zone to add at least one functional group to an aromatic ring of the aromatic hydrocarbons in the pitch stream;
- and
- recycling the functionalized pitch stream to the pyrolysis zone.
2 more elements
A process comprising:
- pyrolyzing a first coal feed into a coal tar stream and a coke stream in a pyrolysis zone;
- fractionating the coal tar stream into at least a pitch stream comprising aromatic hydrocarbons;
- gasifying a second coal feed to produce a syngas stream comprising H2 and CO;
- processing the syngas stream to produce one or more of methanol, olefins, acetic acid, and formic acid;
- feeding the one or more of methanol, olefins, acetic acid, and formic acid into a reaction zone;
- reacting the pitch stream in the reaction zone to add at least one functional group to an aromatic ring of the aromatic hydrocarbons in the pitch stream;
- and
- recycling the functionalized pitch stream into the pyrolysis zone.
5 more elements
Dependencies are inferred from the claim text.