| 摘要 |
In an overbased sulfonate process calcium hydroxide is formed in situ by the continuous and uniform addition of water to calcium oxide over the entire hydration and carbonation time rather than incrementally. It has been found that the water rate and amount are critical. A 300 TBN product is formed with an H2O/CaO molar ratio of 0.4 and a 3 hour hydration time. A 400 TBN product is formed with an H2O/CaO molar ratio of 0.8 and 3 hour hydration time. Improved filterability and raw material utilization as well as reduced by-product solids content is achieved.
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