Hydrogenation of high boiling hydrocarbons
USRE32265E · kind E · reissue
Assignee
Inventors
Key dates
| Filing date | May 17, 1985 |
| Grant date | Oct 14, 1986 |
| Priority date | — |
| Expiry date | May 17, 2005 |
Classification
- Technology area (CPC —)General
Abstract
.[.In a hydrogenation operation employing an ebullated catalytic bed, recycle is recovered from the hydrogenated product with at least 25%, by volume, of the recycle boiling above 950.degree. F. The recycle is cooled to a temperature of from 350.degree. to 600.degree. F. to separate coke precursors, prior to recycle to the hydrogenation. Higher conversion levels can be achieved by effecting recycle in such manner..]..Iadd.Disclosed is a hydrogenation process using at least one fluidized catalytic stage and a recycle material of heavy hydrogenated effluent. The heavy effluent material is cooled to a temperature within 350.degree.-600.degree. F. to separate toluene and heptane insoluble coke precursors prior to recycle. This separation may be enhanced by the use of centrifugation, filtration or a bed of particulate material (e.g. calcined coke). .Iaddend.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.