Control of cyanides in FCC reactor by injection of ammonium polysulfide
US4508683A · kind A · utility
10Cited by
0References
16Claims
0Family size
Inventors
Key dates
| Filing date | Nov 10, 1983 |
| Grant date | Apr 2, 1985 |
| Priority date | — |
| Expiry date | Nov 10, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/904
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The concentration of cyanides in the sour water system of FCC reactor is controlled by injecting such an amount of ammonium polysulfide (APS) into the system that the weight ratio of net free sulfur to simple cyanides in the sour water is about 0.6 to about 3.8. The pH of the sour water is at least 8.0.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.