Prevention of sulfur gas emissions from a rotary processor using lime addition
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United States of America Patent
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Mar 4, 1997
Grant Date -
N/A
app pub date -
Jun 21, 1994
filing date -
Oct 25, 1993
priority date (Note) -
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Abstract
Oil sand is treated to prevent the production of sulfur dioxide ('SO.sub.2 ') from a known rotating kiln-type processor. Lime or calcium oxide ('CaO') is added with the oil sand feed to the kiln. In the kiln, the CaO is mixed with the sulfur-containing bitumen of the oil sand and preheated. The preheated mixture is then pyrolysed, forming coke which is modified by the added CaO to reduce its tendency to produce SO.sub.2 when combusted. The modified coke is then combusted with air, producing substantially no SO.sub.2.
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