Patent ID: 7767000
Filing Date: 2010-08-03
Classification: B01D,C01B,Y02C

Abstract:
1. A method of removing hydrogen chloride and hydrogen sulfide from a process gas stream comprised of the hydrogen chloride and the hydrogen sulfide using a regenerable manganese oxide sorbent comprising: contacting the process gas stream with a sorbent comprised of a first manganese oxide at an absorption temperature, where the first manganese oxide is comprised of MnO, MnO exhausting the hydrogen chloride and hydrogen sulfide depleted gas stream; isolating the loaded sorbent from the process gas stream and the hydrogen chloride and hydrogen sulfide depleted gas stream and exposing the loaded sorbent to a regeneration atmosphere comprised of oxygen, and heating the loaded sorbent to a regeneration temperature such that some portion of the manganese chloride comprising the loaded sorbent reacts with some portion of the oxygen comprising the regeneration atmosphere to produce a second manganese oxide and a gaseous chlorine, where the second manganese oxide is comprised of MnO, MnO isolating the regenerated sorbent from the regeneration atmosphere and the gaseous chlorine and the gaseous sulfur dioxide and cooling the regenerated sorbent to the absorption temperature; and repeating the contacting the process gas stream step using the regenerated sorbent comprised of the second manganese oxide and the third manganese oxide as the sorbent comprised of the first manganese oxide, thereby removing hydrogen chloride and hydrogen sulfide from the process gas stream comprised of hydrogen chloride and hydrogen sulfide using a regenerable manganese oxide sorbent.