Unilever Patent Holdings B.v.

Lever Brothers Company, Division of Conopco, Inc.

Martin Concannon

Maurice Webb

Keith R Cockett

Anthony L Lovell

Roderick T Whalley

Anthony Nock

Robert M Hunter

A method of treating a liquid medium to remove from it matter present therein comprises adding to the liquid medium at least one of an at least partially undried sorbing agent (a), a freshly prepared sorbing agent (b) and an in-situ sorbing agent (c). Sorbing agent (a) comprises a hydrotalcite-like material resulting from the preparation thereof in a liquid reaction medium, which preparation allows retention, in the hydrotalcite-like material, of at least 10% of free liquid, based on the weight of the hydrotalcite-like material, including the free liquid, and (a).sub.1 which sorbing agent is present in an amount, on a dry weight basis, of the sorbing agent, by volume of the liquid medium to be treated, of .ltoreq.0.035% w/v, or (a).sub.2 the preparation of the hydrotalcite-like material is such as to provide a grain size of the hydrotalcite-like material of .ltoreq.130 .ANG., as measured in the &lt;001&gt; direction by x-ray diffraction on a subsequently dried material. Sorbing agent (b) comprises a hydrotalcite-like material resulting from the preparation thereof in a liquid reaction medium and present in the reaction medium without substantial removal of the reaction medium. Sorbing agent (c) comprises a reaction mixture capable of forming, in-situ, in the contaminated liquid medium, a hydrotalcite-like material.

Sorbing agents

The removal of organo-toxins from aqueous sources can be achieved efficiently by contacting the water source with hydrotalcite-like materials. The toxins include organo-chlorines, insect resist agents, and wool treatment byproducts.

Absorption of materials

Removing unreacted dye from fabric: bath liquors treated with absorbent

A detergent composition comprising a detergent active system, and a hydrotalcite-like material as defined in formula I,

Detergent compositions comprising a hydrotalcite-like material for

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West Kirby, United Kingdom

Martin Concannon