Heavy naphtha upgrading
AssigneeMobil Oil Corporation
InventorsMohsen N. Harandi, Roger A. Morrison
Life of this patent
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Abstract
A fluid catalytically cracked heavy naphtha containing a substantial proportion of preferably more than 90% C.sub.9 + hydrocarbons is contacted with a reformate heavy naphtha containing a substantial proportion of C.sub.9 + hydrocarbons and, optionally, a benzene-rich stream, over a catalyst of acidic functionality, preferably unsteamed ZSM-5, under transalkylation reaction conditions of temperature and pressure to produce a gasoline boiling range product, boiling below 300.degree. F., having a reduced sulfur content and an increased octane number. In one mode of operation the reformate is cascaded from the reformer as the conditions of reaction are compatible with the conditions established in the reformer.
Claims29
A process for making light products from a catalytically cracked heavy naphtha and a reformate heavy naphtha fraction both containing a significant proportion of C.sub.9 to C.sub.13 hydrocarbons, comprising the steps of:
- a) feeding the catalytically cracked heavy naphtha and the reformate heavy naphtha to a reaction zone;
- and
- b) processing the feed fractions in the same reaction zone as step a) over a catalyst of acidic functionality under conditions of elevated temperature ranging from about 500.degree. F. to about 1,000.degree. F. and elevated pressure to convert the feed to a product comprising a hydrocarbon fraction having a larger proportion of hydrocarbons boiling in the gasoline boiling range than the catalytically cracked heavy naphtha and the reformate heavy naphtha feeds.
A process for making light products from a sulfur-containing fluid catalytically cracked heavy naphtha and a reformate heavy naphtha said fractions containing at least 60 we. % C.sub.9 to C.sub.13 hydrocarbons, comprising the steps of:
- a) cascading the reformate heavy naphtha fraction from a catalytic reforming zone to a reaction zone;
- b) cofeeding the fluid catalytically cracked heavy naphtha fraction to the reaction zone;
- and
- c) processing the reformate heavy naphtha and the fluid catalytically cracked heavy naphtha feed fractions in the same reaction zone as step b) over a catalyst of acidic functionality under conditions of elevated temperature ranging from about 500.degree. F. to about 1000.degree. F. and elevated pressure to produce a product comprising a hydrocarbon fraction containing a larger proportion of hydrocarbons boiling in the gasoline boiling range than the feeds and having a reduced sulfur content.
A process for making light products from a catalytically cracked heavy naphtha containing a major proportion of methyl branched aromatic hydrocarbons, comprising the steps of:
- a) cascading a reformate heavy naphtha containing a major proportion of ethyl and higher alkyl branched aromatic hydrocarbons from a catalytic reforming zone to a reaction zone;
- b) cofeeding the fluid catalytically cracked heavy naphtha containing a major proportion of methyl branched aromatic hydrocarbons to the reaction zone;
- and
- c) processing the reformate heavy naphtha and the fluid catalytically cracked heavy naphtha in the same reaction as step b) over a catalyst of acidic functionality under conditions of elevated temperature ranging from about 500.degree. F. to about 1000.degree. F. and elevated pressure to convert the naphthas to a product comprising a fraction having a larger proportion of hydrocarbons boiling in the gasoline boiling range than the feeds.
Dependencies are inferred from the claim text.