C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
252/124, 260/314
C07C 309/04 (2006.01) C07G 99/00 (2009.01) C07D 233/22 (2006.01) C07D 263/10 (2006.01) C10M 159/24 (2006.01)
Patent
CA 1338540
A composition and process for preparing an overbased calcium sulfonate, in which a specific class of compounds is employed as promoters in making overbasedcalcium sulfonates. These promoters give an enhanced efficiency of the conversion of lime to an oil-soluble dispersion of calcium carbonate. Low post-carbonation solids and high TBN (total base number of alkaline reserve) result from this improved promoter system. The process for preparing highly basic calcium sulfonate includes contacting an acidic gas at a temperature between 60°F TO 130°F, with a mixture of a sulfonic acid or calcium salt thereof, a hydrocarbon solvent, calcium hydroxide, a small quantity of co-promoter methanol, and up to 1.0% by weight of a compoundwith formula: (I) where X=C,O,N, or S; Y=O,N or S; R=H or, C1 to C50; and R'=H,CH2CH2OH or CH2CH2NH2 when Y is N, and zero when Y is O or S.
563255
Johnson Douglas S. Q.c.
Witco Corporation
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