ES2177718T5 - DETERGENT DRYING COMPONENT BY SPRAYING THAT INCLUDES COMPLAINANT. - Google Patents

Abstract

THE PRESENT INVENTION REFERS TO A DEVELOPED COMPOSITE BY ASPERSION THAT IS IN THE FORM OF FREE FLOW PARTICLES WITH A HIGH CHELATING ACTIVITY, FORMED BY: I) AT LEAST 50%, AND PREFERIBLY AT LEAST 60%, BY WEIGHT COMPLAINANT AGENT; II) BETWEEN 1% AND 25%, AND PREFERIBLY BETWEEN 5% AND 10%, BY WEIGHT OF AN ALKALINE METAL, OR A SULFATE OF AN ALKALINOTERAL METAL; AND III) PREFERIBLY LESS THAN 10% IN WEIGHT OF FREE MOISTURE.

Description

Spray-dried detergent component which comprises chelator.

The present invention relates to a component spray drying comprising a chelator, in particular acid diethylene triamino penta (methylene phosphonic) or its salts. Such components are useful in detergent products. granular, and also as intermediate products in manufacturing of bar soap, detergent tablets and other forms of detergents such as extrudates and agglomerates.

The document US-A-4,259,200, issued on 31 March 1981, describes phosphonates complexed with calcium ions, magnesium, zinc or aluminum, the metal ion molar ratio being to phosphonate at least 1: 1. It is described that magnesium and phosphonate they can be premixed in any suitable solvent, including water, optionally mixed with other detergent components and It can be spray dried. Stability is sought Improved storage in bleaching compositions.

The document EP-A-0 225 309, published on 10 June 1987, describes the addition of alkali metal salts or alkaline earth particles comprising acid diethylene triamino penta (methylene phosphonic) for the purpose of improving the properties of free flow and of storage. The amount of sulfate is 60% to 200% of the dry weight of the chelator, which corresponds to a weight ratio of ion salt metallic to chelating from 0.6: 1 to 2: 1. Water content preferred after spray drying is less than 10% in particle weight.

The prior art does not suggest that spray dried components can be prepared having a high chelator content (at least 50% by weight) and still They maintain good free flow properties.

The object of the present invention is provide a spray dried component that is in shape of a free flowing particle with high activity chelator

Summary of the invention

This object is achieved through a component spray drying, comprising:

i) at least 50%, preferably at least 60% in weight of a chelator;

ii) from 1% to 25%, preferably from 5% to 10% by weight of an alkali metal or alkaline earth metal sulfate; Y

iii) preferably, less than 10% by weight of moisture free

The chelator is a phosphonic or succinic acid, or a phosphonic or succinic acid salt, more preferably the chelator is selected from the group consisting of acid diethylene triamino penta (methylene phosphonic), acid ethylene diamino-N, N'-disuccinic, or mixtures, or salts thereof.

The alkaline earth metal is preferably the magnesium.

Detailed description of the invention

The spray-dried component of the The present invention comprises a chelator. Chelators are used, for example in detergent compositions, for its ability to complex with metal ions such as iron and / or manganese forming soluble chelates. Suitable chelators can be selected between amino phosphonates.

Useful amino phosphonates include ethylene diamino tetrakis- (methylene phosphonates), sold as DEQUEST®. Preferably, these aminophosphonates do not contain alkyl or alkenyl groups with more than about 6 carbon atoms

Particularly preferred chelants are acidic. diethylene triamino penta (methylene phosphonic)  ("DTPMP") and acid ethylene diamino tetra (methylene phosphonic) (EDTMP).

A preferred biodegradable chelator for use here is ethylene diamino-N, N'-disuccinate  ("EDDS"), especially the [S, S] isomer described in the US-A-4 704 233, issued on November 3, 1987, to Hartman and Perkins.

For use in the present invention, preferred magnesium sulfates Epsom salts are particularly preferred, MgSO 4 • 7 O 2 O, that is the crystalline hydrated form of magnesium sulfate with seven moles of water.

The chelants used in the present invention can be conveniently provided from sources commercially available in aqueous solution. Typical solutions commercially available have a chelating activity from about 40% to about 60% by weight. The component spray drying can be produced by mixing a solution aqueous of this type with the required amount of sulfate, with the adding more water if necessary to reduce the total content in solids, and then form granules by spraying the solution into a conventional spray drying tower in countercurrent or in parallel current. In the tower, the water is evaporates by hot gas, usually hot air, preferably at a level of less than 10% by weight of free moisture in the component spray drying finished.

Optionally, the granules dried by spraying can pass through additional drying stages and / or cooling in conventional treatment equipment, such as fluid bed Larger and finer fractions are separated, normally, for example, by passing the granules over a sieve vibrator.

Additional treatment can be provided. which includes additional granulation steps, agglomeration or compaction, as well as dry mixing with other components for provide finished products such as detergent powders, bar soaps and pills.

Examples

Example one Example 2 DTPMP 80 84 MgSO 4 • 7H 2 O 10 5 Chloride sodium 5 6 Humidity free 5 5 DTPMP is the heptasodium acid salt diethylene triamino penta (methylene phosphonic). MgSO 4 • 7 O 2 O is salts of Epsom

All levels are in% by weight, unless Specify otherwise.

The spray drying component produced in these examples has an apparent density of between 500 g / l and 700 g / l. The component absorbs very little moisture after manufacture (for example, of atmospheric humidity) and, in Consequently, fluidity and caking problems are minimized or eliminate even in high temperature and high environments humidity.

Claims (5)

1. A spray-dried component, which understands:

i)

chelator

ii)

from 1% to 25% by weight of a sulfate alkali metal or alkaline earth metal; Y

iii)

moisture free

characterized in that the spray drying component comprises at least 50% by weight of a chelator, wherein the chelator is a phosphonic or succinic acid, or salt of phosphonic or succinic acid, or mixtures thereof. 2. A spray dried component according to claim 1, comprising:

i)

to the minus 60% by weight of chelator;

ii)

from 5% to 10% by weight of a sulfate alkali metal or alkaline earth metal; Y

iii)

less than 10% by weight moisture free.

3. A spray dried component according to claim 1, wherein the chelator is selected from the group consisting of acid diethylene triamino penta (methylene phosphonic),  acid ethylene diamino-N, N'-disuccinic, acid salts diethylene triamino penta (methylene phosphonic), acid salts ethylene diamino-N, N'-disuccinic, or their mixtures. 4. A spray dried component according to any of the previous claims, wherein the metal Alkaline earth is magnesium. 5. A spray dried component according to claim 4, wherein the alkaline earth metal sulfate is in the hydrated crystalline form of MgSO 4 • 7H 2 O.