EP0458398A2
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EP
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Bleach activation
Assignee: Unilever PLC
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Filing: 1991-05-15
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Granted: —
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Expires: 2011-05-15
Abstract
Abstract Novel bleach and oxidation catalysts, a method of bleaching substrates using these catalysts and bleaching (detergent) compositions containing the catalysts are reported. The catalysts are a manganese-based co-ordination complex of the general formula : [L n Mn m Xp] z Y q wherein Mn is manganese in the IV-oxidation state; n and m are independent integers from 2-8; X represents a co-ordination or bridging species; p is an integer from 0-32; Y is a counter-ion, the type of which is dependent on the charge z of the complex which can be positive, zero or negative; q = z/[charge Y]; and L is a ligand which is an organic molecule containing a number of hetero-atoms selected from N, P, O, and S, which co-ordinates via all or some of its hetero-atoms and/or carbon atoms to the Mn (IV) -center(s), which latter are anti-ferromagnetically coupled.
Inventors
- 👤 Thomas Louise F. Favre
- 👤 Ronald Hage
- 👤 Karin Van Der Helm-Rademaker
- 👤 Hypolites Koek
- 👤 Rudolf Johan Martens
- 👤 Ton Swarthoff
- 👤 Marten Robert P. Van Vliet
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 11:50
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/395; C11D3/39; C11D3/3902; C11D3/3905; C11D3/3932
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
126 words
A bleaching and oxidation catalyst comprising a manganese-based co-ordination complex of the general formula : [L n Mn m X p ] z Y q wherein Mn is manganese in the IV-oxidation state; n and m are independent integers from 2-8; X represents a co-ordination or bridging species; p is an integer from 0-32; Y is a counter-ion, the type of which is dependent on the charge z of the complex which can be positive, zero or negative; q = z/[charge Y]; and L is a ligand which is an organic molecule containing a number of hetero-atoms selected from N, P, O, and S, which co-ordinates via all or some of its hetero-atoms and/or carbon atoms to the Mn (IV) -center(s), which latter are anti-ferromagnetically coupled.
Claim 2
Dependent Claim
20 words
A catalyst according to Claim 1, characterized in that the extent of anti-ferromagnetic coupling |J| is greater than 200 cm⁻¹.
Claim 3
Dependent Claim
20 words
A catalyst according to Claim 2, characterized in that the extent of anti-ferromagnetic coupling |J| is greater than 400 cm⁻¹.
Claim 4
Dependent Claim
16 words
A catalyst according to Claim 1, 2 or 3, characterized in that p is from 3-6.
Claim 5
Dependent Claim
19 words
A catalyst according to Claim 4, characterized in that p is 3; n is 2 and m is 2.
Claim 6
Dependent Claim
47 words
A catalyst according to Claim 5, characterized in that it has the formula : wherein X is a co-ordinating/bridging species selected from H₂O; OH⁻; O₂²; O²⁻; HO₂⁻; SH⁻; S²⁻; >SO; NR₂⁻; RCOO⁻; NR₃, with H, alkyl, or aryl, optionally substituted; Cl⁻, N₃⁻, SCN⁻, N³⁻ or mixtures thereof.
Claim 7
Dependent Claim
24 words
A catalyst according to Claim 6, characterized in that L is a multidentate ligand which co-ordinates via three hetero-atoms to the manganese (IV) -centers.
Claim 8
Dependent Claim
28 words
A catalyst according to Claim 7, characterized in that L is a multidentate ligand which co-ordinates via three nitrogen atoms to each one of the manganese (IV) -centers.
Claim 9
Dependent Claim
15 words
A catalyst according to Claim 6, 7 or 8, characterized in that X is O²₋.
Claim 10
Dependent Claim
34 words
A catalyst according to Claim 9, characterized in that it has the formula : [(L'N₃)Mn IV (µ-O)₃Mn IV (N₃L')] z Y q wherein L'N₃ and N₃L' represent ligands containing at least three nitrogen atoms.
Claim 11
Dependent Claim
21 words
A catalyst according to Claim 9, characterized in that it has the following structural formula : abbreviated as [Mn IV ₂(µ-O)₃(Me-TACN)₂](PF₆)₂.
Claim 12
Dependent Claim
21 words
A catalyst according to Claim 9, characterized in that it has the following structural formula : abbreviated as [Mn IV ₂(µ-O)₃(Me/Me-TACN)₂](PF₆)₂.
Claim 13
Dependent Claim
39 words
A bleach precursor, characterized in that it is a manganese-based co-ordination complex which, in the presence of a peroxy compound, is transformed into a Mn (IV) -based co-ordination complex with anti-ferromagnetically coupled Mn (IV) -centers according to Claims 1-12.
Claim 14
Dependent Claim
44 words
A bleaching or cleaning process employing a bleaching agent comprising a peroxy compound, characterized in that said bleaching agent is activated by a catalytic amount of a catalyst according to any of the preceding Claims 1-12 or a catalyst precursor according to Claim 13.
Claim 15
Dependent Claim
31 words
A process according to Claim 14, characterized in that said catalyst or precursor is used at a level of from 0.001 ppm to 100 ppm of manganese in the bleaching solution.
Claim 16
Dependent Claim
19 words
A process according to Claim 15, characterized in that said level of manganese is from 0.01 to 20 ppm.
Claim 17
Dependent Claim
41 words
A process according to Claim 14, 15 or 16, characterized in that said bleaching agent 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 18
Dependent Claim
15 words
A process according to Claim 17, characterized in that the catalyst is [Mn IV ₂(µ-O)₃(Me-TACN)₂](PF₆)₂.
Claim 19
Dependent Claim
15 words
A process according to Claim 17, characterized in that the catalyst is [Mn IV ₂(µ-O)₃(Me/Me-TACN)₂](PF₆)₂.
Claim 20
Dependent Claim
26 words
A bleaching composition comprising a peroxy compound and a catalyst according to any of the preceding Claims 1-13, or a catalyst precursor according to Claim 14.
Claim 21
Dependent Claim
45 words
A composition according to Claim 20, characterized in that it comprises said peroxy compound at a level of from 2 to 30% by weight and said catalyst or catalyst precursor at a level corresponding to a manganese content of from 0.0005% to 1.0% by weight.
Claim 22
Dependent Claim
19 words
A composition according to Claim 21, characterized in that said manganese content is from 0.001% to 0.5% by weight.
Claim 23
Dependent Claim
38 words
A composition according to Claims 20-21, characterized in that 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 24
Dependent Claim
23 words
A composition according to Claim 23, characterized in that it further comprises a surface-active material in an amount up to 50% by weight.
Claim 25
Dependent Claim
25 words
A composition according to Claim 24, characterized in that it further comprises a detergency builder in an amount of from 5 to 80% by weight.
Claim 26
Dependent Claim
31 words
A composition according to Claim 23, 24, or 25, characterized in that it further comprises an enzyme selected from the group consisting of proteases, cellulases, lipases, amylases, oxidases and mixtures thereof.
Claim 27
Dependent Claim
19 words
A composition according to any of the preceding Claims 20-26, characterized in that the catalyst is [Mn IV ₂(µ-O)3(Me-TACN)₂](PF₆)₂.
Claim 28
Dependent Claim
19 words
A composition according to any of the preceding Claims 20-26, characterized in that the catalyst is [Mn IV ₂(µ-O)3(Me/Me-TACN)2](PF₆)₂.
References Cited (Backward Citations)
No citation records indexed.
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