Patent ID: 9227172
Filing Date: 2016-01-05
CPC Classification: B01D,B01J

Claim Text:
1. A process of treating a gas stream containing acidic pollutants, including sulfur oxides and/or hydrogen halides, the process comprising applying a sorbent composition into said gas stream ahead of a particulate matter collection device, in order to adsorb at least a portion of the acid pollutant species, wherein said sorbent composition comprises a compound having formula (II), wherein B is a hygroscopic solid at a preferred water to solid molar ratio of about 0.1 to about 6, wherein B is a basic metal oxide, hydroxide or carbonate, said B containing at least one metal cation selected from calcium, magnesium, strontium, barium, sodium, lithium, potassium, cesium, lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, dysprosium, scandium, ytterbium, yttrium, and erbium; and the molar ratio of y/x is equal to 0.01-0.5.