Preferably the detergent composition contains a sulphonate anionic detergent such as linear alkylbenzene sulphonate.

Preferably the detergent composition contains a sulphonate anionic detergent such as linear alkylbenzene sulphonate.

The invention relates to a mineral construction-material composition containing, as an additive, a mixture that comprises (a) at least one alkylnaphthalene sulphonate, (b) at least one alkylbenzene sulphonate and (c) at least one alkali sulphate.

The composition also preferably contains 2.0 % to 5.5 % hydroxyalkyl quaternary ammonium cationic surfactant, the ratio of alkylbenzene sulfonate and alkyl sulfate surfactant to such cationic surfactant being from 40:1 to 16:1.

They may advantageously be used as a cosurfactant or foam enhancer in combination with another surfactant, especially an anionic surfactant, for example, primary alcohol sulphate or alkylbenzene sulphonate.

This liquid detergent contains an α-sulfofatty acid ester salt (component (a)), an alkylbenzene sulfonate salt (component (b)), a polyoxyethylene alkyl ether sulfate salt (component (c)), and an alkanolamine (component (d)).

The commercially most significant type of surfactants is currently the anionic surfactant alkyl benzene sulfonate (LAS), which is widely used in cleaners and detergents.[19]

The commercially most significant type of surfactants is currently the anionic surfactant alkyl benzene sulfonate (LAS), which is widely used in cleaners and detergents.[8]

The commercially most significant type of surfactants is currently the anionic surfactant alkyl benzene sulfonate (LAS), which is widely used in cleaners and detergents.[11]

Preferably, the alkylbenzene and alkylnapthalene sulfonic acid is selected to be a(C6 to C18)alkylbenzene sulfonic acid/napthalene sulfonic acid, especially preferred being dodecylbenzene sulfonic acid.

It is preferred that the over-based metal sulfonate is an over-based calcium sulfonate.

These modified alkylbenzene sulfonates produced have improved cleaning effectiveness in hard and/or cold water while also biodegradability comparable to that of linear alkylbenzene sulfonates.

Thereafter, the alkylbenzenes are isolated to provide the alkylbenzene product.

The internal olefin sulfonate composition contains an internal olefin sulfonate (A) having 12 carbon atoms, and an internal olefin sulfonate (B) having 14 carbon atoms.

The invention provides a detergent granule comprising alkyl ester fatty acid sulphonate and alkyl benzene sulphonate.