Process for the removal of selenium from selenium-containing aqueous streams
US5846404A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 15, 1994 |
| Grant date | Dec 8, 1998 |
| Priority date | — |
| Expiry date | Sep 15, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G9/005
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A selenium-containing aqueous stream may be used as a quenching water stream and optionally a cutting water stream in a delayed coking process to effectuate the removal of selenium from the selenium-containing aqueous stream resulting in the formation of a selenium-coke product. In addition, selenium may be concentrated in selenium-containing stripped sour water streams by recycling the stream in one or more hydroprocessing units and one or more sour water stripper units and subsequently removed by using a portion of the selenium-containing stripped sour water stream as a quenching water stream and optionally a cutting water stream in a delayed coking process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.