METHOD FOR PURIFICATION OF OXYGEN-CONTAINING GASES AGAINST IODINE IMPURITIES AND SORBENT FOR ITS REALIZATION Russian patent published in 1995 - IPC

FIELD: purification of gases and steam streams. SUBSTANCE: stream of gases and/or steams is brought into contact with sodium zeolite of faujasite-type. Said zeolite is modified with the help of lead and silver by ion exchange method. This process is described by formula aNa₂O·bPbO·cAg₂O·Al₂O₃·(2,5± 0,5)SiO₂, where b and c are degree of exchange of sodium ions by lead and silver ions respectively, b = 0.05-0.5, c=0.3-0.7, a+b+c= 1. Proposed zeolite may be used in mixture together with sodium zeolite A, degree of sodium exchange for both zeolites being coincided. Quantity of zeolite A in mentioned above mixture is 10-20 %. Preferred ratio of coefficients b/(b+c) in zeolite formula is 0.15-0.6. EFFECT: improves efficiency of the method. 7 cl, 1 tbl