Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Patent
1997-07-28
1999-05-25
Geist, Gary
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
562568, C07C 5116
Patent
active
059070552
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to the use of triacids of the formula I ##STR2## where X.sup.1 to X.sup.3 are, independently of one another, carboxylic acid groups of the formula COOM, sulfonic acid groups of the formula SO.sub.3 M or phosphonic acid groups of the formula PO.sub.3 M.sub.2, where to 18 carbon atoms, -alkylene, and the total of x+y+z must be greater than or equal to 1, metal complexes for changing the redox potential, and as builders in detergents and cleaners.
Since some of the compounds I are novel substances, the invention furthermore relates to these novel substances. The invention additionally relates to processes for preparing the triacids I and to the use of intermediates arising therein and the preparation thereof.
2. Description of the Background
The complexing agents employed for heavy metal ions in a wide variety of industrial sectors, in which the ranges of requirements and problems in some cases differ greatly from one another, are still usually the long-known and proven systems such as polyphosphates, nitrilotriacetic acid or ethylenediaminetetraacetic acid. However, these agents have certain disadvantages, the principal weaknesses being in particular that their heavy metal binding capacity is still in need of improvement, their stabilizing effect in bleaching baths and bleaching systems is not yet optimal, and their biodegradability and elimination capacity are usually inadequate.
U.S. Pat. No. 2,316,636 describes a process for preparing aminopolycarboxylic acids and their salts from the underlying amino alcohols. Specific aminopolycarboxylic acids mentioned are, inter alia, the compounds ##STR3## Aminopolycarboxylic acids of these types are recommended for the industrial sectors of detergents and laundry aids, of water softening, of water treatment and of textile bleaching.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide complexing agents which no longer have the disadvantages of the prior art.
We have found that this object is achieved by the above-defined use of the triacids I.
DETAILED DESCRIPTION OF THE INVENTION
The described triacids I based on alkoxylated tertiary amines can be employed both in the form of the free acids (M=hydrogen) and in the form of their mono-, di- or trisalts (in the case of carboxylic or sulfonic acids) or mono- to hexasalts (in the case of phosphonic acids).
Particularly suitable salts of these types are the sodium, potassium and ammonium salts, especially (in the case of carboxylic or sulfonic acids) the trisodium, tripotassium and triammonium salt, and organic triamine salts with a tertiary nitrogen atom.
Suitable bases underlying the organic amine salts are, in particular, tertiary amines such as trialkylamines with 1 to 4 carbon atoms in the alkyl, such as trimethyl- and triethylamine, and trialkanolamines with 2 or 3 carbon atoms in the alkanol residue, preferably triethanolamine, tri-n-propanolamine or triisopropanolamine.
Preferred triacids I are those where X.sup.1 to X.sup.3 are carboxylic acid groups of the formula COOM.
Suitable and preferred 1,2-alkylene groups A.sup.1 to A.sup.3 are those with 2 to 4 carbon atoms, in particular groups derived from ethylene oxide, propylene oxide or butylene oxide. A.sup.1 to A.sup.3 are preferably 1,2-ethylene or 1,2-propylene. However, A.sup.1 to A.sup.3 can also be larger groups, for example those derived from styrene oxide or longchain epoxides such as decene oxide or dodecene oxide.
Particularly suitable C.sub.1 -C.sub.8 -alkylene groups R.sup.1 to R.sup.3 are linear or branched C.sub.1 -C.sub.4 -alkylene groups, but especially methylene, 1,1-ethylene, 1,1-propylene and 1,2-ethylene.
The variables x, y and z are preferably independently of one another a number from 0 to 5, in particular 0 to 3. Particularly preferred triacids I are those in which these variables have the following meanings: X.sup.3 and/or A.sup.1 to A.sup.3 and/or R.sup.1 to R.sup.3 are in each case identical.
Of particular interest for the u
REFERENCES:
patent: 2316636 (1943-04-01), Teeters
patent: 5292936 (1994-03-01), Franczyk
patent: 5367112 (1994-11-01), Franczyk
CA:120:288467 by Rissanen in Supramol Chem 2 (2-3) pp. 247-250, 1993.
Beilstein reg no 1748627, prep of in Bull Soc Chim Fr 287, 1953.
Baur Richard
Fetzer Thomas
Greindl Thomas
Oftring Alfred
Potthoff-Karl Birgit
BASF - Aktiengesellschaft
Geist Gary
Vollano Jean F.
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