Patent ID: 6054419
Filing Date: 2000-04-25
Classification: C10M

Abstract:
A mixture of alkyl aryl sulfonates of superalkalinized alkaline earth metals characterized in that it comprises(a) at least 50% and not more than 85% by weight of a mono alkyl phenyl sulfonate in which the mono alkyl substituent is a linear chain, containing between 14 and 40 carbon atoms, and the phenyl sulfonate radical of the alkaline earth metal is fixed, in a molar proportion of between 0 and 13%, in position 1 or 2 of the linear alkyl chain, and(b) at least 15% and not more than 50% by weight of a heavy alkyl aryl sulfonate selected from:(i) dialkyl aryl sulfonates, wherein the two alkyl substituents are both linear alkyl chains, of which the sum of the carbon atoms is between 16 and 40, and(ii) mono or poly alkyl aryl sulfonates wherein the alkyl substituent or substituents are branched chains, wherein the sum of the carbon atoms is on average between at least 15 and up to 48 carbon atoms;wherein said mixture of alkyl aryl sulfonates has a maximum molar content of 10% of linear mono alkyl phenyl sulfonate having the phenyl sulfonate radical substituted in position 1 or 2 of the linear alkyl chain.