Abstract: In the preparation of an overbased calcium sulfonate from a chloride free calcium sulfonate and calcium oxide, it has been found that 0.4 to 0.9 wt % calcium chloride improves the overbasing reaction rate.

Abstract: Provided are polyurea and lithium complex grease compositions whose anti-fretting properties are improved by the addition of an anti-fretting additive which comprises the reaction product of an alkenyl succinic acid or anhydride having the structural unit represented by the following formula: ##STR1## in which R is an alkenyl of 10 to 35 carbon atoms, and an alkanolamine which is represented by the following formula:H.sub.2 N(CH.sub.2).sub.n OHin which n is an integer from 2 to 6.

Abstract: Normal alpha-olefins containing minimum paraffin content are prepared from hydrocarbon wax streams by a process which comprisesPreheating a charge wax stock to thermal cracking temperature;Passing said charge wax stock during said preheating operation through the intermediate temperature range of 625.degree.-800.degree. F in a time less than about 8 seconds whereby the desired product contains a decreased proportion of paraffin impurities;Thermally cracking said preheated charge wax stock in vapor phase in the presence of steam at thermal cracking conditions thereby forming a product stream cracking effluent containing desired product n-alpha olefins containing 6-18 carbon atoms together with decreased proportion of paraffin impurities;Separating said desired product n-alpha olefins containing 6-18 carbon atoms from said product stream cracking effluent; andMaintaining the Severity Value of said product stream cracking effluent during said separating less than about 66.5.