Method of removing mercury in liquid hydrocarbon
US6268543A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 1999 |
| Grant date | Jul 31, 2001 |
| Priority date | — |
| Expiry date | Nov 5, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G31/08
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
In a method of efficiently removing mercury from a liquid hydrocarbon, the liquid hydrocarbon is contacted with water contacted in advance with a crude oil and a sludge contacted in advance with a crude oil. Alternatively, the liquid hydrocarbon is contacted with a substance having ability of ionizing elemental mercury and a sulfur compound having the formula: MM'S, wherein M and M' are identical or different and are each hydrogen, alkali metal or ammonium group. When the liquid hydrocarbon to be treated contains no dissolved oxygen or contains dissolved oxygen in an amount in equilibrium with a gas containing 8% by volume of oxygen, the increase in the mercury concentration of a liquid hydrocarbon after the removing treatment is effectively prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.