Patent ID: 6322769
Filing Date: 2001-11-27
Classification: B01D,C01F,C01P,C04B

Abstract:
An industrial absorbent composition used for absorbing and removing entrained contaminants including HCl and SO.sub.2 in flue gases produced in industrial installations, the industrial absorbent composition consisting essentially of dried calcium hydroxide particles formed by slaking particles of CaO having a size lower than 5 mm and a reactivity to water greater than 40.degree. C./min, the dried calcium hydroxide particles having a moisture content of less than 2 percent by weight of the total composition, a specific surface area greater than 30 m.sup.2 /g, a total nitrogen desorption pore volume of at least 0.1 cm.sup.3 /g, and a CO.sub.2 content of less than 2 percent by weight of the total composition, the aforementioned particles being in the form of a mixture comprising a first fraction of particles having a size of less than 32 micrometers and a second fraction of particles of a size greater than 32 micrometers, the weight percent of the second fraction ranging from 20 to 50 percent, the aforementioned particles containing pores with a diameter ranging from 100 to 400 Angstroms and also having a nitrogen desorption pore volume greater than 0.1 cm.sup.3 /g.