Process for the purification of sulfur
A process for the purification of sulfur that contains impurities is described. In a contact zone ( 1 ), solid sulfur ( 2 ) is brought into contact with at least one organic solvent ( 16 ) that is selected from the group that is formed by monohydric alcohols with 8 to 40 carbon atoms, polyols that c...
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| Main Authors | , , |
|---|---|
| Format | Patent |
| Language | English |
| Published |
27.06.2002
|
| Online Access | Get full text |
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| Summary: | A process for the purification of sulfur that contains impurities is described. In a contact zone (
1
), solid sulfur (
2
) is brought into contact with at least one organic solvent (
16
) that is selected from the group that is formed by monohydric alcohols with 8 to 40 carbon atoms, polyols that comprise 2 to 8 hydroxyl groups and that have 8 to 40 carbon atoms, polyalkylene glycols and polyalkylene glycol ethers under suitable conditions for carrying out the melting of sulfur. The supply of sulfur is halted, and the mixture that is obtained is allowed to decant so as to produce the segregation or liquid/liquid separation of the purified liquid sulfur that is obtained and organic solvent that contains impurities. At least a portion of the purified liquid sulfur is drawn off (
8
) from the lower portion of the contact zone. The solvent can be used until it is saturated with products that are dissolved and/or in suspension, no longer allowing the separation of the liquid sulfur and the solvent. It can be either regenerated and recycled or eliminated.
Application of the process for the purification of the sulfur that is obtained in a "redox" process. |
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