Linde Clinsulf process

Increased sulfur recovery can be obtained with a modification of the Clinsulf process that uses two parallel Clinsulf reactors downstream of the second condenser. The first of the two parallel reactors is operated at a temperature below the sulfur solidification point by cooling the reactor internally to less than 100°C at the outlet, while the second reactor is regenerating. The two parallel reactors alternate between reaction/adsorption and regeneration modes of operation. Linde has investigated sub-solid-point operation at its test facility in Hdllriegel-skreuth and claims that sulfur recoveries up to 99.8% can be achieved (Linde, 1988). In 1994, it was reported that two Clinsulf plants were in operation (Linde A.G., 1994). 

CLINSULF [Carl von Linde sulfur] A variation of the Claus process in which the heat from the process is used to heat a second catalytic reactor. The process is designed for gases rich in hydrogen sulfide. First commercialized in 1992 and offered by Linde, Munich. 

Linde A. G., 1988, The Clinsulf Sub-Dew-Point Process for Sulphur Recovery, reprint from Linde Reports on Science and Technology, No. 44, Linde, A.G. 

---