Method of controlling interaction between pretreating and hydrocracking stages
Abstract
Abstract A METHOD OF DETERMINING AND CONTROLLING THE CONCENTRATION OF POLYCYCLIC AROMATIC COMPOUNDS IN VARIOUS HYDROCARBON STREAMS OF A MULTI-STAGE PROCESS COMPRISING PRETREATING AND HYDROCRACKING IS DESCRIBED. THE METHOD COMPRISES EMPLOYING ULTRAVIOLET AND VISIBLE LIGHT TO DETERMINE THE CONCENTRATION OF THREE OR MORE CONDENSEDRING POLYCYCLIC AROMATICS IN HYDROCARBON STREAMS AND IN REPONSE TO THE MEASURED CONCENTRATION OF CONDENSED-RING POLYCYCLIC AROMATICS, CONTROL MEANS ARE OPERATED TO VARY THE RAW FEED COMPOSITION TO THE PROCESS COMPRISING FEED PRETREAT FOLLOWED BY HYDROCRACKING THEREOF, THE CONDITIONS EMPLOYED IN THE PRETREAT STAGE SO AS TO CONTROL THE CONCENTRATION OF POLYCYCLIC AROMATICS IN THE EFFUENT THEREFROM AND THE CONCENTRATION OF POLYCYCLIC AROMATICS IN THE HYDROCARBON CHARGE TO THE HYDROCRACKING STAGE OF THE PROCESS PARTICULARLY WHEN RECYCLE PRODUCE OF THE HYDROCRACKING STEP IS RETURNED THERETO.
Inventors
- 👤 Francis V Hanson
- 👤 Paul W Snyder Jr
Bibliographic Details
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