| abstract |
A method of preparing a amorphous metal sulfonate detergent for lubricants. The sulfonate detergent is prepared by: (a) mixing, stirring and heating a diluted metal sulfonate with Ca(OH)2; (b) adding to the stirred, heated sulfonate mixture a sufficient amount of CO2 to heat with all the Ca(OH)2 added; (c) adding a zeolite to the mixture partway through the addition of CO2 to remove a certain percentage of the total water in said mixture; (d) filtering the water-removed mixture to separate an amorphous metal sulfonate product; and (e) recovering the amorphous overbased metal sulfonate product. |