EP0544519A2
Expired / Lapsed
EP
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Bleach manganese catalyst and its use
Assignee: Unilever PLC
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Filing: 1992-11-25
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Granted: —
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Expires: 2012-11-25
Abstract
Abstract Novel bleach and oxidation catalysts are reported as well as a bleaching-detergent composition employing these catalysts and a method for removing stains from substrates. The catalysts are manganese complexes of the formula (A) : [ LMn IV (OR) ₃] Y , (A) wherein mn is manganese in the +4 oxidation state; R is a C₁-C₂₀ radical selected from alkyl, cycloalkyl, aryl, benzyl and radical combinations thereof; at least two R radicals may also be connected to one another so as to form a bridging unit between two oxygens that coordinate with the manganese; L is a ligand selected from a C₃-C₆₀ radical having at least 3 nitrogen atoms coordinating with the manganese; and Y is an oxidatively-stable counterion.
Inventors
- 👤 Sharon Marie Harriott-Jureller
- 👤 Judith Lynne Kerschner
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 01:27
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/16; B01J31/22; C; C11; C11D; C11D3/00; C11D3/39; C11D3/3902; C11D3/3905; C11D3/3932; B01J31/18; B01J31/1805; B01J31/181; B01J31/1815; B01J31/182; B01J2531/00; B01J2531/70; B01J2531/72
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
93 words
A catalyst having the formula (A): [ LMn IV ( OR )₃] Y , ( A ) wherein Mn is manganese in the +4 oxidation state; R is a C₁-C₂₀ radical selected from alkyl, cycloalkyl, aryl, benzyl and radical combinations thereof; at least two R radicals may also be connected to one another so as to form a bridging unit between two oxygens that coordinate with the manganese; L is a ligand selected from a C₃-C₆₀ radical having at least 3 nitrogen atoms coordinating with the manganese; and Y is an oxidatively-stable counterion.
Claim 2
Dependent Claim
16 words
A catalyst according to claim 1 wherein the ligand L is selected from 1,4,7-trimethyl-1,4,7-triazacyclononane, and 2-methyl-1,4,7-trimethyl-1,4,7-triazacyclononane.
Claim 3
Dependent Claim
12 words
A catalyst according to claim 1 which is Mn(IV) (Me₃TACN) (OCH₃)₃ (PF₆).
Claim 4
Dependent Claim
126 words
A bleaching composition comprising: i) from about 1 to about 60% by weight of a peroxy compound; and ii) a manganese complex present in an effective amount for catalysing bleaching activity of the peroxy compound and having the structure: [ LMn IV ( OR )₃] Y , ( A ) wherein Mn is manganese in the +4 oxidation state; R is a C₁-C₂₀ radical selected from alkyl, cycloalkyl, aryl, benzyl and radical combinations thereof; at least two R radicals may also be connected to one another so as to form a bridging unit between two oxygens that coordinate with the manganese; L is a ligand selected from a C₃-C₆₀ radical having at least 3 nitrogen atoms coordinating with the manganese; and Y is an oxidatively-stable counterion.
Claim 5
Dependent Claim
39 words
A composition according to claim 4, which comprises said peroxy compound at a level of from 2 to 30% by weight and said catalyst at a level corresponding to a manganese content of from 0.0005% to 0.5% by weight.
Claim 6
Dependent Claim
17 words
A composition according to claim 4, wherein said manganese content is from 0.001 to 0.25% by weight.
Claim 7
Dependent Claim
36 words
A composition according to claim 4, wherein said peroxy compound is selected from the group consisting of hydrogen peroxide, hydrogen peroxide-liberating compounds, hydrogen peroxide-generating systems, peroxyacids and their salts, and peroxyacid bleach precursors, and mixtures thereof.
Claim 8
Dependent Claim
21 words
A composition according to claim 4, which further comprises a surface-active material in an amount form 0.5% to 50% by weight.
Claim 9
Dependent Claim
21 words
A composition according to claim 4, which further comprises a detergency builder in an amount from 5 to 80% by weight.
Claim 10
Dependent Claim
25 words
A composition according to claim 4, which further comprises an enzyme selected from the group consisting of proteases, cellulases, lipases, amylases, oxidases and mixtures thereof.
Claim 11
Independent Claim
138 words
A method is provided for bleaching a stained substrate the method comprising contacting the stained substrate in an aqueous medium with a peroxy compound and a manganese complex each in an effective amount to interact with one another and provide a cleaning effect upon the substrate, the complex having the formula: [ LMn IV ( OR )₃] Y , ( A ) wherein Mn is manganese in the +4 oxidation state; R is a C₁-C₂₀ radical selected from alkyl, cycloalkyl, aryl, benzyl and radical combinations thereof; at least two R radicals may also be connected to one another so as to form a bridging unit between two oxygens that coordinate with the manganese; L is a ligand selected from a C₃-C₆₀ radical having at least 3 nitrogen atoms coordinating with the manganese; and Y is an oxidatively-stable counterion.
Claim 12
Dependent Claim
16 words
A method according to claim 11, wherein the substrate is selected from fabric, dishware and dentures.
Claim 13
Dependent Claim
38 words
An aqueous medium comprising the manganese catalyst of claim 1 at a level from 0.001 ppm to 100 ppm of manganese and a peroxy compound that delivers active oxygen at a level from 0.01 ppm to 250 ppm.
References Cited (Backward Citations)
No citation records indexed.
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