发明名称 |
Selective removal of sulfide from aqueous alkali solutions |
摘要 |
A method for removing sulfide from an aqueous alkali solution in which hydrogen peroxide is introduced into a sulfide-containing aqueous alkali solution associated with an alkali mineral recovery operation. The method is particularly useful for the processing of sulfide-containing aqueous alkali solutions containing NaHCO3 and Na2CO3, where bicarbonate in the sulfide-depleted alkali solution is decomposed to form Na2CO3, with concurrent evolution of gaseous carbon dioxide byproduct but without formation of gaseous H2S as a pollutant, and where Na2CO3 values are subsequently recovered from the sulfide-depleted carbonate-rich alkali solution via a crystallization operation. |
申请公布号 |
US8858902(B2) |
申请公布日期 |
2014.10.14 |
申请号 |
US201313896503 |
申请日期 |
2013.05.17 |
申请人 |
FMC Wyoming Corporation |
发明人 |
Copenhafer William C. |
分类号 |
C01B17/00;C01D7/10;C01D7/30;C02F1/72;C01D7/24 |
主分类号 |
C01B17/00 |
代理机构 |
FMC Corporation |
代理人 |
FMC Corporation |
主权项 |
1. A method for removing sulfide from an aqueous alkali solution comprising
introducing a reagent consisting essentially of aqueous hydrogen peroxide into a sulfide-containing aqueous alkali solution obtained from an alkali mineral recovery operation to oxidize soluble sulfide in the aqueous alkali solution to a soluble reaction product and form a sulfide-depleted aqueous alkali solution. |
地址 |
Philadelphia PA US |