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DELAYED COKING PROCESS is a thermal process, which increases the molecular aggregation or association in petroleum‐based residues or COAL‐TAR PITCHES, leading to extended mesophase domains. This is achieved by holding them at an elevated temperature (usually 750–765 K) over a period of time (12–36 hours). It is performed in a coking drum and is designed to ultimately produce DELAYED COKE. The feed is rapidly preheated in a tubular furnace to about 760 K.

See: COAL‐TAR PITCH, DELAYED COKE.