Process for impregnating active carbon with iodine compounds
First Claim
Patent Images
1. A process for the removal of sulfur dioxide or hydrogen sulfide from a gas stream which comprises the steps of:
- a. impregnating in a static state an active-carbon bed with an aqueous solution containing iodine or a water-soluble iodide salt and a reducing agent soluble in said solution and selected from the group which consists of sulfur dioxide, alkali metal sulfites, alkali metal hydrogen sulfites and hydrazine, the quantity of said reducing agent being at least the equivalent of the reducing capabilities of 3 grams of SO2 per liter; and
b. thereafter passing said gas through the impregnated bed.
0 Assignments
0 Petitions
Accused Products
Abstract
A process for the impregnation of active carbon with an iodine compound in which the solution is also provided with a reducing agent preferably hydrazine or a compound capable of decomposing to produce sulfur dioxide (e.g. a sulfite or hydrogen sulfite) or solubilized sulfur dioxide. The impregnated active carbon can be used for the removal of sulfur dioxide or hydrogen sulfide from a gas stream.
-
Citations
4 Claims
-
1. A process for the removal of sulfur dioxide or hydrogen sulfide from a gas stream which comprises the steps of:
-
a. impregnating in a static state an active-carbon bed with an aqueous solution containing iodine or a water-soluble iodide salt and a reducing agent soluble in said solution and selected from the group which consists of sulfur dioxide, alkali metal sulfites, alkali metal hydrogen sulfites and hydrazine, the quantity of said reducing agent being at least the equivalent of the reducing capabilities of 3 grams of SO2 per liter; and b. thereafter passing said gas through the impregnated bed. - View Dependent Claims (2, 3, 4)
-
Specification