Process of producing low-dust anionic surfactant concentrates in

Details Process of producing low-dust anionic surfactant concentrates in Process of producing low-dust anionic surfactant concentrates in

1994-10-12

1996-07-16

Lieberman, Paul

Cleaning compositions for solid surfaces, auxiliary compositions

Auxiliary compositions for cleaning, or processes of preparing

Surfactant composition for cleaning agents

159 44, 159 481, 510536, 510457, 510452, 510443, C11D 1100

Patent

active

055364306

DESCRIPTION:

BRIEF SUMMARY
This invention relates to a new form of presentation of washing- and/or cleaning-active anionic surfactant concentrates as dust-free, solid, free-flowing powders and/or granules. More particularly, the problem addressed by the invention was to make washing- and/or cleaning-active anionic surfactant compounds available in a form in which they had not previously been available with this combination of properties. More particularly, the invention sought to provide fine-particle powders and/or granules adjustable as required in their anionic surfactant content (which was intended to extend virtually to the pure surfactant or surfactant mixture) which would be distinguished by the substantial or complete absence of dust, would have high and adjustable apparent densities distinctly in excess of 150 g/l and, at the same time, would show optimized dissolving behavior in aqueous washing and/or cleaning liquors.
In one important embodiment, the invention sought to provide anionic surfactants and/or mixtures of anionic surfactants which would be distinguished by their availability in virtually any quantities but, at the same time, by relatively low production costs, would optimally satisfy the stringent requirements which ecologically safe surfactants or surfactant components are now having to meet and, hence, would be capable of making a significant contribution towards the now desirable replacement of anionic surfactants based on alkylbenzene sulfonates.
In particular embodiments, the problem addressed by the invention was to make known anionic surfactants available from starting materials of vegetable and/or animal origin as principal components of the new dust-free anionic surfactant concentrates. However, the invention is not confined to these starting materials of vegetable and/or animal origin. Surfactant compounds of synthetic origin, more particularly ecologically safe compounds of synthetic origin, are preferred main components and/or mixture components in the context of the teaching according to the invention.
The difficulties involved in solving the problems addressed by the invention are illustrated by way of example hereinafter with reference to the following situation: several ecologically safe anionic surfactant components available in sufficient quantities and at reasonable cost from the field of sulfates and/or sulfonates of oleophilic organic components, such as fatty acids, fatty alcohols, sufficiently long-chain olefins and/or alkanes and the like, are known to experts on detergents and/or cleaning products. Typical examples are the class of semiesters of sulfuric acid with fatty alcohols, more particularly relatively long-chain saturated fatty alcohols, which play an important part under the name of fatty alcohol sulfates (FAS), and fatty alcohol ether sulfates (FAES) derived therefrom by alkoxylation, more particularly ethoxylation and/or propoxylation, of fatty alcohols and subsequent sulfation of the alcohol components thus formed.
Other important representatives of typical anionic surfactants belong to the class of sulfonated fatty acids and washing-active salts thereof and also the associated sulfonated fatty acid esters. Known surfactants from the class just mentioned are the .alpha.-sulfofatty acid methyl esters and their salts (MES) and the .alpha.-sulfonated carboxylic acids derived therefrom by ester cleavage and/or direct .alpha.-sulfonation of fatty acids and the washing-active salts of these carboxylic acids which are known as "disalts". All the anionic surfactant compounds listed above purely by way of example contain relatively long-chain organic residues, for example in the C.sub.8-24 and, more particularly, in the C.sub.12-18 range, and are known mixture components in detergents in which they are normally used with other surfactants, particularly nonionic surfactants, organic and/or inorganic builders or builder components and other typical mixture components.
Hitherto, considerable difficulties have always been involved in making anionic surfactant concentrates of the type in q

REFERENCES:
patent: 3844969 (1974-10-01), Griffiths et al.
patent: 4171243 (1979-10-01), Brooks et al.
patent: 4828721 (1989-05-01), Bollier et al.
patent: 4894117 (1990-01-01), Bianchi et al.
patent: 4963226 (1990-10-01), Chamberlain
patent: 5319117 (1994-06-01), Fabry et al.

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