Mixture of earth-alkaline metal alkyl-aryl-sulphonates, its...

Details Mixture of earth-alkaline metal alkyl-aryl-sulphonates, its... Mixture of earth-alkaline metal alkyl-aryl-sulphonates, its...

C - Chemistry, Metallurgy

10

M

C10M 159/24 (2006.01) C10M 135/10 (2006.01)

Patent

CA 2236318

The invention concerns a mixture of superalkalified earth-alkaline comprising: (a) 50 % to 85 % by weight of one mono-alkyl-sulphonate with a C14-C40 linear chain in which the molar ratio of phenyl-sulphonate substituent in position 1 or 2 is between 0 and 13 %, and (b) 15 % to 50 % by weight of one heavy alkyl-aryl-sulphonate, in which the aryl radical is phenyl substituted or not and the alkyl chains are either two linear alkyl chains with a total of 16 to 40 carbon atoms or one or several branched alkyl chains with an average total of 15 to 48 carbon atoms. Insofar as these mixtures contain less than 10 % of linear mono-alkyl-phenyl-sulphonate substituted in position 1 or 2 of the linear alkyl chain, they have properties enabling their use as washing-dispering additive for lubricating oils.

Un mélange d'alkyl-aryl-sulfonates alcalino-terreux suralcalinisés comportant: (a) 50 % à 85 % en poids d'un mono-alkyl-phényl-sulfonate à chaîne linéaire en C14-C40 dans lequel la proportion molaire de substituant phényl-sulfonate en position 1 ou 2 est comprise entre 0 et 13 %, et (b) 15 % à 50 % en poids d'un alkyl-aryl-sulfonate lourd, dans lequel le radical aryl est phényl ou non et les chaînes alkyl sont soit deux chaînes alkyles linéaires avec un total d'atomes de carbone de 16 à 40, soit une ou plusieurs chaînes alkyles ramifiées avec en moyenne un total d'atomes de carbone de 15 à 48. Dans la mesure où ces mélanges contiennent moins de 10 % de mono-alkyl-phényl-sulfonate linéaire substitué en position 1 ou 2 de la chaîne alkyle linéaire, ils présentent des propriétés les rendant aptes à leur utilisation comme additif détergent-dispersant pour huiles lubrifiantes.

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