초록 ▼

Hydrotalcite-like materials are stable in the crystalline oxide structure and essentially reversible in anion exchange. A novel process of sulfur oxide sorption is provided utilizing these hydrotalcite materials as contact solids. Large crystalline sheet materials having increased sorption of SO.sub

Hydrotalcite-like materials are stable in the crystalline oxide structure and essentially reversible in anion exchange. A novel process of sulfur oxide sorption is provided utilizing these hydrotalcite materials as contact solids. Large crystalline sheet materials having increased sorption of SO.sub.x are provided by incorporation of certain organic acid anionic species to modify the hydrotalcite/brucite structure. Typical industrial applications include sulfur removal from fluid catalyst cracking process, cold-side combustion gas sulfur abatement and cleaner coal gasification.

대표청구항 ▼

[ We claim:] [1.] In the process of sulfur oxide sorption wherein a gas containing sulfur trioxide is contacted at elevated process temperature with a solid sorbent material to remove sulfur oxide from the gas, the improvement which comprises:contacting the sulfur oxide containing gas with a fluidiz

[ We claim:] [1.] In the process of sulfur oxide sorption wherein a gas containing sulfur trioxide is contacted at elevated process temperature with a solid sorbent material to remove sulfur oxide from the gas, the improvement which comprises:contacting the sulfur oxide containing gas with a fluidizable particulate solid sorbent material having an average particle size of 20 to 300 microns and comprising at least one layered hydrotalcite crystalline sheet having a brucite crystalline structure containing divalent and trivalent metal oxides comprising predominantly magnesia and alumina present in the brucite structure in molar ratio of 3:1 to 8:1 magnesia:alumina, together with a sulfur oxide replaceable anion, said hydrotalcite crystalline sheet having a breadth to thickness ratio of 50:1 to 5000:1. [5.] In the process of cracking a heavy hydrocarbon feed stock containing sulfur compounds, wherein a gas phase containing sulfur oxide is contacted at process temperature in the range of 700 to 820.degree. C. with a solid sorbent material to remove sulfur oxide from the gas, the improvement wherein: said solid sorbent material comprises a fluidized bed of regenerable particulate sorbent material having an average particle size of 20 to 300 microns and having at least one layered hydrotalcite sheet having a brucite crystalline structure containing divalent and trivalent metal oxides comprising predominantly magnesia and alumina present in the brucite structure in molar ratio of 3:1 to 8:1 magnesia:alumina, together with a sulfur oxide replaceable anion, said hydrotalcite sheet having a breadth to thickness ratio of 50:1 to 5000:1.