Abstract Hydrocarbon residua boiling mostly 1,000* F. and above are catalytically hydrocracked under liquid phase conditions and novel recycle ratios to obtain a product which is predominantly an aromatic gas oil which is eminently suitable either as a solvent or as feed to commercial hydrocracking operations. Although the upper boiling limit of this gas oil may be in the range of 600*-800* F., the process is illustrated with separation into fractions boiling 650* F.- and 650* F.+. An amount of the low-boiling and high-boiling fractions are recycled so that the feed mixture to the reaction zone contains 20 percent of the lowboiling fraction, 40 percent of the high-boiling fraction, and 40 percent of fresh feed while the high-boiling fraction is recycled to extinction at a rate such that the amount present in the feed mixture to the reactor is equal to the amount in the product. 125 percent of an acyclic hydrocarbon modifier is added to the reaction mixture to act as a free radical acceptor under such conditions that is has a residence time of 1 hour or less as compared to 1 to 6 hours for the residua-recycle mixture.
Inventors
👤 Ralph B Mason
👤 Glen P Hamner
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-31 21:18
CPC Classifications
C; C10; C10G; C10G47/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
38 words
The process of claim 1 in which the residence time of the acyclic hydrocarbon modifier is 1 hour or less and that of the residua-recycle mixture is 1 to 6 hours and the catalyst is pulverized Harshaw nickel.
Claim 2
Dependent Claim
11 words
The process of claim 2 in which the modifier is n-heptane.
Claim 3
Dependent Claim
11 words
The process of claim 2 in which the modifier is n-pentane.
Claim 4
Dependent Claim
12 words
The process of claim 2 in which the modifier is 2,2,4-trimethyl pentane.
Claim 5
Dependent Claim
12 words
The process of claim 2 in which the modifier is 2,2,4-trimethyl pentane-1.
Claim 6
Dependent Claim
12 words
The process of claim 2 in which the modifier is 2,4,4-trimethyl pentane-2.
Claim 7
Dependent Claim
15 words
The process of claim 2 in which the modifier is a normal C5-C7 virgin naphtha.
Claim 8
Dependent Claim
14 words
The process of claim 2 in which the modifier is a 100*-165* F. hydroformate.
Claim 9
Dependent Claim
24 words
The process of claim 2 in which the modifier is the 210*-400* F. fraction made by polymerizing propylenes and butylenes with H3PO4 on kieselguhr.