Process for cleaning mercury-containing gaseous emissions
US4729882A · kind A · utility
55Cited by
5References
6Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 3, 1985 |
| Grant date | Mar 8, 1988 |
| Priority date | — |
| Expiry date | Sep 3, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/64
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for cleaning gaseous emissions containing mercury (Hg) comprises the steps of adding a chlorine-containing material to the mercury-containing gaseous emissions and heating the mixture to convert the mercury into water-soluble mercuric chloride (HgCl.sub.2); scrubbing the water-soluble mercuric chloride with wash water and fixing the same as chlorocomplex ion (HgCl.sub.4.sup.-2) stable in liquid; and thereafter subjecting the washings from the scrubbing step to coagulating sedimentation and thereby fixing and insolubilizing the mercury in the resulting sludge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.