Exxon Chemical Patents, Inc.

Shell Oil Comapny

Richard M Foley

Brendan Dermot Murray

Stanley Nemec Milam

Dane Clark Grenoble

Bruce H C Winquist

Carl W Bradow

An integrated process for converting a hydrocarbon feedstock having components boiling above about 100&deg; C. into steam cracked products is described. The process first involves passing the feedstock to a hydrotreating zone to effect substantially complete decomposition of organic sulfur and/or nitrogen compounds. The product from the hydrotreating zone is passed to an aromatics saturation zone. The product is then passed to a steam cracking zone. Hydrogen and C,-C,hydrocarbons, steam cracked naphtha, steam cracked gas oils and steam cracked tar are recovered. The amount of steam cracked tar produced is reduced by at least about 30 percent, and the amount of steam cracked tar produced is reduced by at least about 40 percent, basis the starting hydrocarbon feedstock which has not been subject to hydrotreating and aromatics saturation.

Steam cracking of hydrotreated and hydrogenated hydrocarbon feeds

An integrated process for converting a hydrocarbon feedstock having components boiling above about 100&deg; C. into steam cracked products is described. The process first involves passing the feedstock to a hydrotreating zone at a pressure in the range of from about 400 psig to about 1,250 psig to effect substantially complete decomposition of organic sulfur and/or nitrogen compounds. The product from the hydrotreating zone is passed to a steam cracking zone. Hydrogen and C,-C,hydrocarbons, steam cracked naphtha, steam cracked gas oil and steam cracked tar are recovered, where the amount of steam cracked tar produced is reduced by at least about 15 percent, basis the starting hydrocarbon feedstock which has not been subject to hydrotreating.

Integrated hydrotreating steam cracking process for the production of olefins

An integrated process for the production of a refinery gasoline pool with enhanced octane value from a pentane and hexane containing feedstock by first contacting with an isomerization catalyst; fractionating the resulting product into an iC.sub.5 product stream forming part of said refinery gasoline pool and a bottom stream containing nC.sub.5, nC.sub.6, mono-branched C.sub.6 and dibranched C.sub.6 ; passing said bottom stream through an adsorption bed with dibranched C.sub.6 passing thru unabsorbed; desorbing nC.sub.5, nC.sub.6 and monobranched C.sub.6 from the absorption bed; and recycling the desorbed nC.sub.5, nC.sub.6 and monobranched C.sub.6 to the isomerization zone.

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Houston, TX, United States of America

Richard M Foley