Method for processing hydrocarbon pyrolysis effluent

A method is disclosed for treating gaseous effluent from a hydrocarbon pyrolysis unit to provide steam cracked tar of reduced asphaltene and toluene insolubles content. The method is suitable for preparing reduced viscosity tar useful as a fuel blending stock, or feedstock for producing carbon black...

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Bibliographic Details
Main Authors GRENOBLE DANE C, MESSINGER JOHN R, STELL RICHARD C, ASPLIN JOHN E, STRACK ROBERT DAVID
Format Patent
LanguageEnglish
Published 10.01.2012
Subjects
ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL
CHEMISTRY
FIRELIGHTERS
FUELS
FUELS NOT OTHERWISE PROVIDED FOR
LIQUEFIED PETROLEUM GAS
LUBRICANTS
METALLURGY
NATURAL GAS
PEAT
PETROLEUM, GAS OR COKE INDUSTRIES
PYROLIGNEOUS ACID
SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K
TECHNICAL GASES CONTAINING CARBON MONOXIDE
WORKING-UP PITCH, ASPHALT, BITUMEN, TAR
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Summary:A method is disclosed for treating gaseous effluent from a hydrocarbon pyrolysis unit to provide steam cracked tar of reduced asphaltene and toluene insolubles content. The method is suitable for preparing reduced viscosity tar useful as a fuel blending stock, or feedstock for producing carbon black, while reducing or eliminating the need for externally sourced lighter aromatics additives to meet viscosity specifications. The method comprises drawing steam cracked tar from a separation vessel, e.g., a primary fractionator or tar knock-out drum, cooling the tar, and returning it to the separation vessel to effect lower overall tar temperatures within the separation vessel, in order to reduce viscosity increasing condensation reactions. An apparatus for carrying out the method is also provided.
Bibliography:Application Number: US20090643470