Sodium Sulfide → Sodium thioarsenate

HRID 2072376Notes

Reaction equation

HRID 2072376 reaction equation
[S-2].[Na+:2].[Na+].[Sb:4]([O-:7])([O-:6])[S-:5].[Na+].[Na+].[Na+].[As:11]([O-:14])([O-:13])[S-:12].[Na+].[Na+].[Na+].[S]>[Hg].[Au]>[Sb:4](=[S:5])([O-:13])([O-:7])[O-:6].[Na+:2].[Na+:2].[Na+:2].[As:11](=[S:12])([O-:6])([O-:14])[O-:13].[Na+:2].[Na+:2].[Na+:2]

Participants

8

Reactant 4

HCID 14804Sodium SulfideHCID 5362487SulfurHCID 19377186HCID 19377186, compoundHCID 178507092HCID 178507092, compound

Product 2

HCID 15394753Sodium thioarsenateHCID 178507091HCID 178507091, compound

Reagents, catalysts & solvents 2

HCID 23931MercuryCatalystHCID 23985GoldCatalyst

Procedure

The products in solution as a result of the sodium sulfide leach reaction include sodium thioantimonite and sodium thioarsenite, along with some mercury and gold. This solution is contacted with elemental sulfur at a temperature of about 80° C in order to produce sodium thioantimonate and sodium thioarsenate. The temperature of the solution is reduced to about 18° C, resulting in the crystallization of about 4.23 pounds per minute antimony and 1.52 pounds per minute arsenic, and trace amounts of gold and mercury. The remaining solution is then recycled to the sodium sulfide leach stage, and the crystals are redissolved using approximately 5% of the recycle solution as a bleed stream and the antimony sulfide wash solution produced later in the process.

Sources & evidence

ORD record
ord-aaa22da97df348e8be99d461273ed575
Source dataset
uspto-grants-1977_09
Patent number
US04051220

Reaction notes

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