Patent ID: 9555420
Date: 2017-01-31
CPC Classifications: B01D,B03C

Claim:
1. A process of treating a gas stream containing mercury, comprising: applying a sorbent into said gas stream ahead of a particulate matter collection device, in order to adsorb at least a portion of a mercury containing compound, wherein said sorbent contains a composition comprising a compound having the following formula (SiO 2 ) x (OH) y M z S a F: wherein M is at least one of the following metal or metalloid cations: boron, magnesium, aluminum, calcium, titanium, vanadium, manganese, iron, cobalt, nickel, copper, zinc, zirconium, molybdenum, palladium, silver, cadmium, tin, platinum, gold, and bismuth; wherein S is a sulfur-based species selected from at least one of the following: sulfide salts selected from sodium sulfide, potassium sulfide, and metal sulfide, dithiocarbamates selected from dimethyldithiocarbamate and diethyldithiocarbamate, polymer-based dithiocarbamates containing the functional group R n CS 2 wherein R is an alkyl group which is linear or branched, and polysulfide salts selected from sodium polysulfide and calcium polysulfide; wherein M and S are embedded within the sorbent; wherein F optionally exists and said F is at least one of the following: a functionalized organosilane, an amine-containing organosilane, and an alkyl-containing organosilane at a surface area coverage of 0.01-100%.