EP0458397A2
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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 manganese complexes of formula : [L n Mn m X p ] z Y q wherein Mn is manganese or iron or mixtures thereof, which can be in the II, III, IV or V oxidation state or mixtures thereof; n and m are independent integers from 1-4; X represents a co-ordination or bridging species; p is an integer from 0-12; Y is a counter-ion, the type of which is dependent upon the charge z of the complex which can be positive, zero or negative; q = z/[charge Y]; and L is a ligand being a macrocylic organic molecule.
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
2026-10-25 07:58
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/395; C11D3/39; C11D3/3902; C11D3/3905; C11D3/3932
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
161 words
A bleach and oxidation catalyst comprising a metal complex of formula (A) : [L n Mn m X p ] z Yq (A) wherein Mn is manganese, or iron or mixtures thereof, which can be in the II, III, IV or V oxidation state or mixtures thereof; n and m are independent integers from 1-4; X represents a co-ordination or bridging species; p is an integer from 0-12; Y is a counter-ion, the type of which is dependent upon the charge z of the complex which can be positive, zero or negative; q = z/[charge Y]; and L is a ligand being a macrocylic organic molecule of the general formula : wherein R¹ and R² can each be zero, H, alkyl or aryl, optionally substituted; t and t' are each independent integers from 2-3; each D can independently be N, NR, PR, O or S, wherein R is H, alkyl or aryl, optionally substituted; and s is an integer from 2-5.
Claim 2
Dependent Claim
119 words
A catalyst according to Claim 1, comprising a manganese complex of formula (A) : (A) [L n Mn m X p ] z Y q wherein Mn is manganese which can be in the II, III, IV or V oxidation state or mixtures thereof; X represents a small co-ordinating ion and/or bridging molecule or combination thereof; and L is a macrocyclic organic molecule of the general formula : wherein R¹ and R² can each be zero, H, alkyl or aryl, optionally substituted, D and D¹ are each independently N, NR, PR, O or S, wherein R is H, alkyl or aryl, optionally substituted; t and t' are each independently integers from 2-3, and s is an integer from 2-4.
Claim 3
Dependent Claim
13 words
A catalyst according to Claim 1 or 2, wherein p is from 3-6.
Claim 4
Dependent Claim
12 words
A catalyst according to Claim 3, wherein n = m = 2.
Claim 5
Dependent Claim
25 words
A catalyst according to Claim 4, wherein D and D¹ are each independently NH or NR; s is 2; and R¹ = R² = H.
Claim 6
Dependent Claim
16 words
A catalyst according to Claim 5, wherein D and D¹ are NCH₃; and t,t' = 2.
Claim 7
Dependent Claim
29 words
A catalyst according to Claim 4, wherein D and D¹ are each independently NH or NR; s is 2; and R¹ and R² are each independently H or alkyl.
Claim 8
Dependent Claim
16 words
A catalyst according to Claim 7, wherein D and D¹ are NCH₃ and t,t' = 2.
Claim 9
Dependent Claim
12 words
A catalyst according to Claim 6, wherein said ligand L is 1,4,7-trimethyl-1,4,7-triazacyclononane.
Claim 10
Dependent Claim
12 words
A catalyst according to Claim 8, wherein said ligand L is 2-methyl-1,4,7-trimethyl-1,4,7-triazacyclononane.
Claim 11
Dependent Claim
33 words
A catalyst according to Claim 9, whose core complex is selected from : (i) [Mn III ₂ (µ-O)₁(µ-OAc)₂(Me-TACN)₂] (ii) [Mn III Mn IV (µ-O)₁(µ-OAc)₂ (Me-TACN)₂] (iii) [Mn IV ₂(µ-O)₃(Me-TACN)₂] (iv) [Mn IV ₂(µ-O)₃(Me/Me-TACN)₂]
Claim 12
Dependent Claim
34 words
A bleaching or cleaning process employing a bleaching agent comprising a peroxy compound, wherein said bleaching agent is activated by a catalytic amount of a catalyst according to any of the preceding Claims 1-11.
Claim 13
Dependent Claim
32 words
A process according to Claim 12, wherein said catalyst is a manganese complex and used at a level of from 0.001 ppm to 100 ppm of manganese in an aqueous bleaching solution.
Claim 14
Dependent Claim
17 words
A process according to Claim 13, wherein said level of manganese is from 0.01 to 20 ppm.
Claim 15
Dependent Claim
39 words
A process according to Claim 12, 13 or 14, wherein 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 16
Dependent Claim
14 words
A process according to Claim 15, wherein a catalyst of Claim 11 is used.
Claim 17
Dependent Claim
18 words
A bleaching composition comprising a peroxy compound and a catalyst according to any of the preceding Claims 1-11.
Claim 18
Dependent Claim
39 words
A composition according to Claim 17, 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 19
Dependent Claim
17 words
A composition according to Claim 18, wherein said manganese content is from 0.001% to 0.25% by weight.
Claim 20
Dependent Claim
36 words
A composition according to Claims 17-18, 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 21
Dependent Claim
20 words
A composition according to Claim 20, which further comprises a surface-active material in an amount up to 50% by weight.
Claim 22
Dependent Claim
22 words
A composition according to Claim 21, which further comprises a detergency builder in an amount of from 5 to 80% by weight.
Claim 23
Dependent Claim
28 words
A composition according to Claim 20, 21 or 22, which further comprises an enzyme selected from the group consisting of proteases, cellulases, lipases, amylases, oxidases and mixtures thereof.
Claim 24
Dependent Claim
18 words
A composition according to any of the preceding Claims 17-23, wherein the catalyst is that of Claim 11.
References Cited (Backward Citations)
No citation records indexed.
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