초록 ▼

An integrated process for converting a hydrocarbon feedstock having components boiling above about 100.degree. 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 t

An integrated process for converting a hydrocarbon feedstock having components boiling above about 100.degree. 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.sub.1 -C.sub.4 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.

대표청구항 ▼

[ What is claimed is:] [1.] An integrated process for converting a hydrocarbon feedstock having components boiling above about 100.degree. C. into steam cracked products, which process comprises:a) passing said hydrocarbon feedstock in the presence of a hydrogen source and at least two hydrotreating

[ What is claimed is:] [1.] An integrated process for converting a hydrocarbon feedstock having components boiling above about 100.degree. C. into steam cracked products, which process comprises:a) passing said hydrocarbon feedstock in the presence of a hydrogen source and at least two hydrotreating catalysts through a hydrotreating zone at an elevated temperature and a pressure in the range of from about 400 psig and about 1250 psig to effect reduction of the sulfur level to below about 100 parts per million and reduction of the nitrogen level to below about 15 parts per million,wherein the hydrotreating catalysts include a first hydrotreating catalyst comprising a component selected from the group consisting of Group VIB metals, oxides, sulfides, Group VIII metals, oxides, sulfides and mixtures thereof, supported on an amorphous carrier, and a second hydrotreating catalyst comprising a Group VIB component selected from the group consisting of tungsten, molybdenum and mixtures thereof, a Group VIII component selected from the group consisting of nickel, cobalt and mixtures thereof, and a carrier selected from the group consisting of amorphous silica-alumina and molecular sieves having a pore diameter greater than about six angstroms,b) passing the product from said hydrotreating zone to a steam cracking zone wherein said product is contacted with steam at temperatures greater than about 700.degree. C., andc) recovering hydrogen and C.sub.1 -C.sub.4 hydrocarbons, steam cracked naphtha, steam cracked gas oil and steam cracked tar therefrom, wherein 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.