Catalytic upgrading of FCC effluent
AssigneeMobil Oil Corporation
InventorDonald M. Nace
Life of this patent
Estimating the term…
Abstract
An apparatus and process for catalytically upgrading an FCC effluent is described, wherein the FCC effluent is contacted with a shape-selective catalyst at low severity conditions prior to fractionation.
Claims30
A process for catalytically cracking a petroleum fraction, comprising the following steps in sequence:
- (a) contacting said petroleum fraction with a cracking catalyst under catalytic cracking conditions to produce a catalytically cracked product;
- (b) directly passing said catalytically cracked product to means for contacting said catalytically cracked product with a shape-selective crystalline silicate zeolite catalyst, and contacting said cracked product with said shape-selective catalyst under conditions to produce a product comprising a gasoline fraction having a higher octane number and comprising a light distillate oil fraction having a lower pour point than said catalytically cracked product;
- and
- (c) fractionating said product of step (b) to produce at least said gasoline fraction with improved octane number and said light distillate oil fraction with improved pour point.
A process for simultaneously increasing the octane number of a gasoline fraction and improving the pour point of a light distillate oil fraction produced in a fluid catalytic cracking unit, comprising:
- (a) contacting a heavy hydrocarbon feed with a cracking catalyst in a fluid catalytic cracking unit under catalytic cracking conditions to produce a catalytically cracked product;
- (b) directly passing said catalytically cracked product to means for contacting said catalytically cracked product with a shape-selective crystalline silicate zeolite catalyst, and contacting said cracked product with said shape-selective catalyst under conditions to produce a product comprising a gasoline fraction having a higher octane number and comprising a light distillate oil fraction having a lower pour point than said catalytically cracked product;
- and
- (c) fractionating said product of step (b) to produce at least said gasoline fraction with improved octane number and said light distillate oil fraction with improved pour point.
A process for catalytically cracking a petroleum fraction comprising the steps of, contacting said petroleum fraction with a cracking catalyst in a fluid catalytic cracking unit under cracking conditions to produce a catalytically cracked product, fractionating said catalytically cracked product under fractionating conditions, directly passing said cracked product to means for contacting said catalytically cracked product with a shape-selective crystalline silicate zeolite catalyst, prior to said fractionating, and contacting said cracked product with said shape-selective catalyst under conditions comprising a temperature of 800.degree. to 950.degree. F., a pressure for atmospheric to 100 psig, and a space velocity, LHSV of 100 to 4000, to produce a product comprising a gasoline fraction having a higher octane number and comprising a light oil distillate fraction having a lower pour point than comparably boiling gasoline and light oil distillate fractions, respectively, of said catalytically cracked product prior to said contacting with said shape-selective catalyst.
A process for catalytically cracking a petroleum fraction, comprising the following steps in sequence:
- (a) contacting said petroleum fraction with a cracking catalyst under catalytic cracking conditions to produce a catalytically cracked product comprising gasoline boiling range and distillate boiling range hydrocarbons;
- (b) contacting said gasoline and distillate boiling range hydrocarbons of said catalytically cracked product with a shape-selective crystalline silicate zeolite catalyst under dewaxing conditions to produce a dewaxed product;
- and
- (c) fractionating said dewaxed product to produce at least a gasoline fraction with improved octane number and a light distillate oil with improved pour point relative, respectively, to said gasoline boiling range hydrocarbons and a comparably boiling distillate oil fraction of said catalytically cracked product prior to said contacting with shape selective catalyst.
Dependencies are inferred from the claim text.