Petroleum Refinery Engineering
Diesel index is defined as

(°API) x (100)/Aniline Point, °F
(°API) x (Aniline Point, °F)/100
(°API) x (Aniline Point, °C)/100
(°API) x (100)/Aniline Point, °C

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Petroleum Refinery Engineering
The order of preference for feedstock to a catalytic reformer is

Coking naphtha - virgin naphtha - catalytic naphtha
Catalytic naphtha - coking naphtha - virgin naphtha
Virgin naphtha - coking naphtha - catalytic naphtha
Virgin naphtha - catalytic naphtha - coking naphtha

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