[1][2] CrystaSulf uses a modified liquid-phase Claus reaction to convert the hydrogen sulfide (H2S) into elemental sulfur which is then removed from the process by filtration.
CrystaSulf is used in the energy industry as a mid-range process to handle sulfur amounts between 0.1 and 20 tons per day.
This eliminates plugging problems that have been documented for aqueous redox processes when operated at high pressures.
After the dissolved elemental sulfur is formed in the hydrocarbon solution, the liquid is piped from the absorber, through a flash vessel if necessary to lower the operating pressure, and then through a crystallizer.
6,416,729 B1;[4] Process for removing hydrogen sulfide from gas streams which include or are supplemented with sulfur dioxide, by scrubbing with a nonaqueous sorbent; 9-Jul-2002; David W. DeBerry, Dennis A. Dalrymple 6,818,194;[5] Process for removing hydrogen sulfide from gas streams which include or are supplemented with sulfur dioxide, by scrubbing with a nonaqueous sorbent; 16-Nov-2004; David W. DeBerry, Dennis A. Dalrymple, Kevin S. Fisher 5,733,516;[6] Process for removal OF hydrogen sulfide from a gas stream; 31-Mar-1998; David W. DeBerry 5,738,834;[7] System for removal of hydrogen sulfide from a gas stream; 14-Apr-1998; David W. DeBerry