Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – Heterogeneous arrangement
Patent
1994-09-23
1996-07-16
Lieberman, Paul
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
Heterogeneous arrangement
159 44, 159 481, 510457, 510470, C11D 1100
Patent
active
055364314
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a process for the production of free-flowing detergent granules and/or partial granules, in which water-containing alkyl and/or alkenyl oligoglycoside pastes are dried and at the same time granulated in a turbo-dryer with rotating fittings in the presence of surfactants and/or other detergent ingredients.
2. Prior Art
Powder-form detergents are normally produced by spray drying. To this end, a water-containing slurry of the ingredients, for example surfactants, builders and fillers, is pumped into the spray drying tower and sprayed through nozzles arranged at the head of the tower. Ascending air with a temperature of 250.degree. to 300.degree. C. dries the slurry and evaporates the adhering water so that a substantially water-free granulated or powder-form product is obtained at the tower exit. Particulars of this process can be found, for example, in ROEMPP Chemie Lexikon, Thieme Verlag, Stuttgart, Vol. V, 1992 under the heading "spray drying".
However, this process is not suitable for the production of powders containing alkyl and/or alkenyl oligoglycosides as their surfactant component (either individually or in admixture with other surfactants), because the high temperatures required in the spray drying tower can lead to partial decomposition of the glucoside. The outcome of this are granules or partial granules with poor color quality and unsatisfactory performance properties. In the present context, partial granules are understood to be intermediate products from which detergents can be produced by mixing in the presence of suitable active substances.
Accordingly, the problem addressed by the present invention was to provide a new process for the production of detergent granules and/or partial granules which would be free from the disadvantages mentioned above.
DESCRIPTION OF THE INVENTION
The present invention relates to a process for the production of free-flowing detergent granules and/or partial granules which is characterized in that water-containing alkyl and/or alkenyl oligoglycoside pastes are dried and at the same time granulated in a turbo-dryer with rotating fittings in the presence of anionic and/or nonionic surfactants and/or typical detergent ingredients.
It has surprisingly been found that light-colored, substantially water-free detergent granules and/or partial granules can be obtained by carrying out the drying and granulation of alkyl and/or alkenyl oligoglycoside pastes in a turbo-dryer in the presence of surfactants and/or other typical ingredients. The products are stable in storage and, in addition, are distinguished by a narrow particle size distribution.
Alkyl and/or alkenyl oligoglycosides suitable as starting materials for the process according to the invention correspond to formula (I): and 0, 1, 2 or 3 double bonds,
Preferred alkyl and/or alkenyl oligoglycosides are those derived from aldoses or ketoses and--by virtue of its ready availability--preferably from glucose. Accordingly, the preferred alkyl oligoglycosides are the alkyl oligoglucosides.
The index p in general formula (I) indicates the degree of oligomerization (DP degree), i.e. the distribution of mono- and oligoglycosides, and is a number of 1 to 10. Whereas p in a given compound must always be an integer and, above all, may assume a value of 1 to 6, the value p for a certain alkyl and/or alkenyl oligoglycoside is an analytically determined calculated quantity which is generally a broken number. Alkyl oligoglycosides with an average degree of oligomerization p of 1.1 to 3.0 are preferred, alkyl and/or alkenyl oligoglycosides with a degree of oligomerization of less than 1.7 and, more particularly, between 1.2 and 1.4 being particularly preferred.
The substituent R.sup.1 may be derived from saturated and/or unsaturated primary alcohols containing 8 to 22 and preferably 8 to 10 or 12 to 18 carbon atoms. Typical examples are capric alcohol, 2-ethylhexanol, caprylic alcohol, lauryl alcohol, isotridecyl alcohol, myristyl alcohol, cet
REFERENCES:
patent: 3703772 (1972-11-01), McHugh et al.
patent: 4536319 (1985-08-01), Payne
Carduck Franz-Josef
Eskuchen Rainer
Schulz Paul
Douyon Lorna M.
Grandmaison Real J.
Henkel Kommanditgesellschaft auf Aktien
Jaeschke Wayne C.
Lieberman Paul
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