Process for removing elemental sulfur from a gas stream

Details Process for removing elemental sulfur from a gas stream Process for removing elemental sulfur from a gas stream

1997-09-23

1999-04-27

Straub, Gary P.

Chemistry of inorganic compounds

Sulfur or compound thereof

Elemental sulfur

23293S, 95291, 95290, 4235741, C01B 1702

Patent

active

058978500

ABSTRACT:
A process for the recovery of sulfur from a hydrogen sulfide containing gas, comprising oxidizing hydrogen sulfide with oxygen, and then reacting the product gas of this oxidation further by using at least two catalytic stages. The H.sub.2 S concentration in the gas leaving the last catalytic stage is controlled to have a value ranging between 0.8 and 3% by volume by reducing the quantity of combustion or oxidation air passed to the oxidation stage and/or causing a portion of the hydrogen sulfide-containing feedstock gas to bypass the oxidation stage and to be added to the gas flowing to a catalytic stage. The gas leaving the last catalytic stage is introduced into a heat exchanger having a wall temperature below the solidification point of sulfur and above the dew point of water, wherein the sulfur deposits on the heat exchanger wall and is removed with the aid of gravity.

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Paskall, Howard C. Sulfuacondensor Function and Problem Arears, Western Research Amsterdam 1981.

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