Method for preventing coking in fluidized bed reactor for cracking heavy hydrocarbon oil
US4220518A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Sep 27, 1978 |
| Grant date | Sep 2, 1980 |
| Priority date | — |
| Expiry date | Sep 27, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S423/16
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
In a reactor for cracking heavy hydrocarbon oil through a fluidized bed of particles of natural ores, coke-like materials are deposited on a top of the reactor or pipe inside surfaces of a transfer line from the reactor to a scrubber. To effectively scour out the deposited coke-like materials, particles of natural ores having a mean diameter of a few hundred .mu.m is made to be contained in an effluent gas from the top of reactor, passing through the transfer line at a concentration of 1 to 40 g/m.sup.3. The particles of natural ores have a good effect of scouring out the deposited coke-like materials and can keep the transfer line efficiently clean even with a small amount of the particles of natural ores, decreasing a pressure drop in the transfer line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.