EP0254331A1
Expired / Lapsed
EP
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Process for the preparation of agglomerates containing diperoxydodecanedioic acid, and their use in bleaching compositions
Assignee: Akzo NV
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Filing: 1987-05-20
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Granted: —
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Expires: 2007-05-20
Abstract
Abstract A process for the preparation of agglomerates containing diperoxydodecanedioic acid and a water-impermeable material, e.g. lauric acid, which process comprises the successive steps of agitating an aqueous suspension of the peroxy acid in the presence of the water-impermeable material and above the melting point thereof, cooling the suspension of the agglomerated particles thus obtained to a temperature at which the water-impermeable material turns solid, and isolating the resulting agglomerates. The agglomerates obtained are suitable for use as bleaching agent.
Inventors
- 👤 John Meijer
- 👤 Reinder Torenbeek
- 👤 Rolf Hendrik Van Den Berg
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 10:24
CPC Classifications
C; C11; C11D; C11D17/00; C11D17/0039; C11D3/00; C11D3/39; C11D3/3945
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
119 words
A process for preparing agglomerates containing an aliphatic diperoxydicarboxylic acid and a water-impermeable material solid at room temperature, which process comprises the successive steps of agitating an aqueous suspension of the acid in the presence of the water-impermeable material in an amount of at least 25% by weight, calculated on the acid, for a time sufficient to agglomerate the suspended acid particles and at a temperature above the melting point of the water-impermeable material and below the decomposition temperature of the acid, cooling with continued agitation of the suspension of the agglomerated particles thus obtained to a temperature at which the water-impermeable material turns solid, and isolating the resulting agglomerates, characterized in that the diperoxydicarboxylic acid is 1,12-diperoxydodecanedioic acid.
Claim 2
Dependent Claim
119 words
A process for preparing agglomerates containing an aliphatic diperoxydicarboxylic acid and a water-impermeable material solid at room temperature, which process comprises the successive steps of agitating an aqueous suspension of the acid in the presence of the water-impermeable material in an amount of at least 25% by weight, calculated on the acid, for a time sufficient to agglomerate the suspended acid particles and at a temperature above the melting point of the water-impermeable material and below the decomposition temperature of the acid, cooling with continued agitation of the suspension of the agglomerated particles thus obtained to a temperature at which the water-impermeable material turns solid, and isolating the resulting agglomerates, characterized in that the diperoxydicarboxylic acid is 1,12-diperoxydodecanedioic acid.
Claim 3
Dependent Claim
29 words
A process according to claim 1, characterized in that the amount of water-impermeable material contained in the suspension is at most 100% by weight, calculated on the 1,12-diperoxydodecanedioic acid.
Claim 4
Dependent Claim
34 words
A process according to claim 1, characterized in that the water-impermeable material is selected from the group of fatty acids having 10-20 carbon atoms, fatty alcohols having 14-20 carbon atoms, and fatty acid esters.
Claim 5
Dependent Claim
29 words
A process according to claim 3, characterized in that use is made of a fatty acid selected from the group of lauric acid, myristic acid and a mixture thereof.
Claim 6
Dependent Claim
58 words
A process according to claim 1, characterized in that as aqueous suspension of the 1,12-diperoxydodecanedioic acid there is used a suspension obtained by reacting in a manner known per se 1,12-dodecanedioic acid with hydrogen peroxide to form 1,12-diperoxydodecanedioic acid under the influence of sulphuric acid in aqueous medium, and, if necessary, diluting the resulting reaction mixture with water.
Claim 7
Dependent Claim
42 words
A process according to claim 5, characterized in that the water-impermeable material is a fatty acid containing 10-20 carbon atoms and the sulphuric acid content is not more that 50% by weight, calculated on the total amount of sulphuric acid and water.
Claim 8
Dependent Claim
20 words
Shaped particules containing agglomerates obtained by any one of the methods described in the preceding claims and a hydratable material.
Claim 9
Dependent Claim
23 words
A solid, particulate detergent and bleaching composition containing as bleaching component agglomerates obtained by any one of the methods described in claims 1-6.
Claim 10
Dependent Claim
19 words
A solid, particulate detergent and bleaching composition containing as bleaching component such shaped particles as described in claim 7.
Claim 11
Dependent Claim
26 words
An aqueous, pourable bleaching composition or detergent and bleaching composition containing as bleaching component agglomerates obtained by any one of the methods described in claims 1-6.
References Cited (Backward Citations)
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