| 摘要 |
A process for the production of a lubricating oil additive concentrate comprises reacting at elevated temperature component (A) a calcium hydrocarbyl-substituted sulphonate, component (B) an alkaline earth metal base added either in a single addition or in a plurality of additions at intermediate points during the reaction, component (C) at least one compound which is (i) a polyhydric alcohol having 2 to 4 carbon atoms, (ii) a di- (C3 or C4) glycol, (iii) a tri- (C2-C4) glycol, (iv) a mono- or poly-alkylene glycol alkyl ether of the formula (I) R(OR<1>)xOR<2> (I) wherein R is a C1 to C6 alkyl group, R<1> is an alkylene group, R<2> is hydrogen or a C1 to C6 alkyl group and x is an integer from 1 to 6, (v) a C1 to C20 monohydric alcohol, (vi) a C1 to C20 ketone, (vii) a C1 to C10 carboxylic acid ester, or (viii) a C1 to C20 ether, component (D) a lubricating oil, component (E) carbon dioxide added subsequent to the, or each, addition of component (B), component (F) a defined carboxylic acid or derivative, component (G) at least one compound which is (i) an inorganic halide or (ii) an ammonium alkanoate or a mono-, di-, tri-, or tetra-alkyl ammonium formate or alkanoate provided that, when component (G) is (ii), component (F) is not an acid chloride. |
