What is the difference between sulfides and thiols in liquefied gas?
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What is the difference between sulfides and thiols in delayed coking liquefied gas? How does it change in crude oil? Thiol can be removed using catalytic alkaline solutions, but how can thiols be eliminated?
Thiethers do not react with alkaline solutions; the heavier fractions containing more thiethers can only be separated through distillation in order to reduce the amount of thiether compounds in the liquefied gas.
Thiols can be removed by catalytic hydrogenation or alkaline washing; for the product, both thiols and thioethers affect the total sulfur content. I remember that thioethers undergo a reversible reaction with H2S; reducing the H2S concentration should allow for a corresponding reduction in the thioether concentration.
The hydrogen sulfide level here is 0, but there is still a considerable amount of thioethers in the liquefied gas; by using fractional distillation, some of these can be removed, thereby reducing the total sulfur content in MTBE.