Delayed coking of Petroleum Residual Fractions

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Delayed coking of petroleum residues is done for production of Metallurgical grade petroleum coke lighter fractions and up-gradation of residual fractions :


Salient Features

  1. •  Long residue and short residues can be used in the process

    •  Indigenous/ globally competitive technology



  1. •  This technology was developed by CSIR-IIP in collaboration with EIL in 1999

    •  Technology based on AR which was commercialized in BRPL, Bongaigaon in 1977.

    •  Technology based on VR was commercialized in NRL, Numaligarh in 1999.


User Industries

  1. •  Bongaigaon Refinery Petrochemicals Limited (BRPL), Bongaigaon

    •  Numaligarh Refinery Limited (NRL), Numaligarh


For further information please contact

Mr. Suryadev Kumar
Sr. Scientist
Indian Institute of Petroleum
Dehradun – 248 005
Email :
Phone : 0135 2525704