METHOD AND APPARATUS FOR TREATING HYDROGEN SULFIDE- CONTAINING GAS BY RECIRCULATING REDUCED CATALYST SOLUTION

• Main Authors: BARRERE-TRICCA CECILE, STREICHER CHRISTIAN, HUARD THIERRY
• Format: Patent
• Language: English
• Published: 30.01.2001
• Edition: 7
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; THEIR RELEVANT APPARATUS; TRANSPORTING

PROBLEM TO BE SOLVED: To reduce the number of fine sulfur particles after an absorbing stage by bringing a catalyst container containing a chelate consisting of a chelating agent and polyvalent metal ions and supply gas to a contact state to generate oxidation-reduction reaction and, after gas-liquid separation, recovering a catalyst soln. containing reduced elementary sulfur. SOLUTION: The gas to be treated from a line 2 and the catalyst soln. from a line 3 are brought to a contact state in a catalyst chamber (absorber) 1 to generate oxidation-reduction reaction and a mixture of the catalyst soln. containing partially reduced sulfur particles in a suspended state and gas from which the greater part of sulfur is removed is introduced into a gas-liquid separation drum 5 through a line 4 to separate the catalyst soln. containing suspended sulfur particles and this soln. is sent to an elementary sulfur separator 15 through a pump 8 and a soln. separating junction 10. The catalyst soln. from which the greater part of sulfur is removed is succeedingly supplied to a flash drum 24 through a decompressor 23 to recover the gas in the catalyst soln. while sending the degassed soln. to a regeneration zone 27.