C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
252/18, 23/343
C01B 17/60 (2006.01) B01D 53/14 (2006.01) B01D 53/48 (2006.01)
Patent
CA 1087830
ABSTRACT OF THE DISCLOSURE This disclosure describes a process for the prepara- tion of iron-bearing and calcium-bearing sorbent solids for use in the desulfurization of gases. The process involves mechani- cal procedures for generating porous agglomerated solids that are high in surface area and uniquely suitable in both particle size and mechanical properties for processing in gas-solids contacting equipment of conventional design. The process also involves the use of water in the agglomeration procedures in quantities controlled to react both chemically and mechanically with solid components of the feed materials and to generate ad- hesive cement between finely divided solids in porous agglomer- ated particles of the sorbent product. All components of the solid feed to the sorbent preparation process may be obtained from both finely divided new solids and solids obtained by re- cycle of regenerated solids from other sections of the combined process. The selection of either iron-bearing or calcium- bearing solids for use in the process generally depends on the type of gas that is to be desulfurized, and on both the total demand and the net cost of the new solids required by the com- bined process, Iron-bearing sorbents are significantly less costly to regenerate than calcium-bearing sorbents, and gene- rally are preferred for most industrial uses. When iron-bear- ing sorbents are utilized in the desulfurization of fuel gases at temperatures above 750°C, magnesium and/or aluminum bearing diluent materials are employed as components of the new feed to the sorbent preparation process. These diluents, when con- verted to refractory oxides in agglomerated particles of the sorbent solids by procedures of the combined process, eliminate the tendency of these solids otherwise to fuse, to agglomerate, and to defluidize in contact with the hot gases in desulfuriza- tion absorber equipment.
280367
Mcgauley Patrick J.
Swabey Ogilvy Renault
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