Steam cracking process and facility comprising injection of powder which is collected at a single point
US5820747A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 25, 1997 |
| Grant date | Oct 13, 1998 |
| Priority date | — |
| Expiry date | Jun 25, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G9/16
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A steam cracking process and facility is described which comprises injection of erosive powder to effect at least partial decoking of transfer line exchangers without interrupting the steam cracking stream. The powder, preferably injected just upstream of the transfer line exchangers (TLE) (4), is separated from the cracked gases in primary gas/solid separators (5), temporarily stored in receiving drums at a controlled temperature and evacuated to a common powder storage and/or treatment module by pneumatic transfer by means of a relatively low flow of uncondensable gas. The process and facility can be used to collect solid fragments generated by injection of chemical compounds which are catalysts for the gasification of coke by steam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.