Processes for preparing and regenerating a copper containing mercury collecting solid mass
US4902662A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 1988 |
| Grant date | Feb 20, 1990 |
| Priority date | — |
| Expiry date | May 25, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2220/4812
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention relates to a process for preparing a mercury collecting solid mass containing a carrier and copper, at least partly as copper sulfide, comprising the following steps of: PA1 (a) incorporating with the carrier at least one copper compound other than a sulfide, PA1 (b) optionally roasting said carrier, PA1 (c) incorporating therewith at least one organic polysulfide, and PA1 (d) thermally treating the resultant mass, in non-oxidizing atmosphere, under gas scavenging. The invention also concerns a regenerating process for a mercury recovery mass, containing a carrier, and copper, at least partly as copper sulfide, comprising incorporating with said mass, after a decrease of its mercury recovery efficiency and after removal of at least a part of its mercury content, an organic polysulfide, and finally subjecting it to a thermal treatment, in non-oxidizing atmosphere, under gas scavenging.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.