EP0183945B1 - Aqueous stable suspensions of water-insoluble silicates, capable of binding calcium ions, and their use for the production of washing and cleaning agents - Google Patents

Abstract

There is prepared an aqueous stable suspension of a water insoluble silicate capable of binding calcium ions and it is used for the production of washing and cleaning agents. The suspension contains in addition to water components A and B wherein component A is a silicate capable of binding calcium and having the formula (Cat2/nO)x-Me2O3x(SiO2)y I and component B is a dispersing agent comprising a mixture of at least two fatty alcohols polyglycol ether based on isotridecyl alcohol or another aliphatic C13 alcohol and ethylene oxide having the following properties: (a) Fatty alcohol polyglycol ether having 4.5 to 5.5 EO units -Turbidity point DIN 53917 56 to 60 DEG C. -Solidification point +4 to -25 DEG C. -Viscosity at 50 DEG C. 13 to 28 m Pas -Density at 50 DEG C. 0.94 to 0.96 g/ml - (b) Fatty alcohol polyglycol ether having 6 to 8 EO units -Turbidity point DIN 53917 66 to 74 DEG C. -Solidification point +12 to -16 DEG C. -Viscosity at 50 DEG C. 18 to 28 m Pas -Density at 50 DEG C. 0.96 to 0.98 g/ml -

Description

Processes for washing and cleaning solid materials, in particular textiles, and detergents and cleaning agents suitable for carrying out the processes have already been proposed, for which the function (builder) of the calcium complex-binding phosphates is wholly or partly capable of binding calcium , finely divided, generally water-containing, water-insoluble aluminum silicates is taken over (cf. DE-A 24 12 837).

in der Kat ein mit Calcium austauschbares Kation der Wertigkeit n, x eine Zahl von 0,7 bis 1,5, Me Aluminium und y eine Zahl von 0,8 bis 6, vorzugsweise von 1,3 bis 4, bedeuten.These are compounds of the general formula I.

in the cat, a cation exchangeable with calcium of the valence n, x is a number from 0.7 to 1.5, Me aluminum and y is a number from 0.8 to 6, preferably from 1.3 to 4.

Sodium is preferred as the cation, but it can also be replaced by lithium, potassium, ammonium or magnesium.

The compounds defined above which are capable of binding calcium are referred to below as "aluminum silicates" for the sake of simplicity. This applies in particular to the sodium aluminum silicates to be used with preference; all statements made for their use according to the invention and all statements regarding their production and properties apply accordingly to the entirety of all the compounds defined above.

The aluminum silicates which are particularly suitable for use in detergents and cleaning agents have a calcium binding capacity of preferably 50 to 200 mg CaO / g of the anhydrous aluminum silicate. If reference is made to anhydrous aluminum silicate in the following, it means the state of the aluminum silicate which is reached after drying for one hour at 800 ° C. With this drying, both the adhering and the bound water are practically completely removed.

In the production of detergents or cleaning agents in which the aluminum silicates defined above are present in addition to the usual constituents of such agents, aluminum silicates which are moist, for example still from their production, are advantageously used. The moist compounds are mixed with at least some of the other constituents of the agent to be produced and the mixture is converted into the finished washing or cleaning agent as the end product, for example into a pourable end product, by known measures, such as spray drying.

As part of the manufacturing process for detergents or cleaning agents outlined above, the aluminum silicates are used, among other things. delivered or used in the form of an aqueous suspension. Since the transport inter alia over longer distances, the suspension properties - e.g. Suspension stability and pumpability - the aluminum silicates dispersed in the aqueous phase have certain requirements.

It is known to use alkylphenol ethylene adducts to stabilize aluminum silicate suspensions. (DE-A-26 15 698, DE-A-32 09 631). 50% and more are achieved here.

Suspensions are also known which, in addition to the alkali aluminum silicate as stabilizer, contain ethoxylation products of 10 to 20 carbon atoms, preferably unsaturated alcohols, with 1 to 8 moles of ethylene oxide per mole of the alcohol (DE-A-25 27 388, DE-A-26 15 698) . With the dispersants from the last-mentioned applications, it has hitherto only been possible to achieve a maximum solids concentration of 38% by weight in the suspension.

It has now been found that certain mixtures of alkyl alcohol ethoxylates have a very particular ability to stabilize suspensions of calcium-binding aluminum silicates in such a way that they are stable for a long time even with a high solids content and can still be pumped perfectly even after standing for a long time.

• A) als wasserunlösliches, zum Binden von Calcium befähigtes Silikat in einer Menge von 0,5 bis 70 Gewichtsprozent eine feinverteilte, gebundenes Wasser enthaltende, synthetisch hergestellte, wasserunlösliche, kristalline Verbindung der allgemeinen Formel
  
  in der Kat ein mit Calcium austauschbares Kation der Wertigkeit n, x eine Zahl von 0,7 bis 1,5 Me Bor oder Aluminium und y eine Zahl von 0,8 bis 6 bedeuten, und
• B) als dispergierend wirkenden Bestandteil in einer Menge von 0,5 bis 6 Gewichtsprozent ein Gemisch mindestens zweier unterschiedlicher Fettalkoholpolyglykolether auf Basis eines aliphatischen C,₃-Alkohols, insbesondere Isotridecylalkohol, und Ethylenoxid, die durch die folgenden Kenndaten gekennzeichnet sind:
  • a) Fettalkoholpolyglykolether mit 4,5 bis 5,5 EO Trübungspunkt DIN 53 917 56 bis 60°C Erstarrungspunkt +4 bis -25°C Viskosität bei 50°C 13 bis 28 m Pas Dichte bei 50°C 0,94 bis 0,96 g/ml
  • b) Fettalkoholpolyglykolether mit 6 bis 8 EO Trübungspunkt nach DIN 53 917 66 bis 74°C Erstarrungspunkt +12 bis -16°C Viskosität bei 50°C 18 bis 28 m Pas Dichte bei 50°C 0,96 bis 0,98 g/ml enthält.

The invention relates to an aqueous, pumpable, stable suspension of a water-insoluble silicate capable of binding calcium ions, which contains a dispersing component, which is characterized in that, in addition to water, based on the total weight of the aqueous suspension;

• A) as a water-insoluble, capable of binding calcium in an amount of 0.5 to 70 percent by weight a finely divided, bound water-containing, synthetically produced, water-insoluble, crystalline compound of the general formula
  
  in the cat a calcium-exchangeable cation of the valence n, x is a number from 0.7 to 1.5 Me boron or aluminum and y is a number from 0.8 to 6, and
• B) as a dispersing component in an amount of 0.5 to 6 percent by weight, a mixture of at least two different fatty alcohol polyglycol ethers based on an aliphatic C, ₃ alcohol, in particular isotridecyl alcohol, and ethylene oxide, which are characterized by the following characteristics:
  • a) fatty alcohol polyglycol ether with 4.5 to 5.5 EO cloud point DIN 53 917 56 to 60 ° C solidification point +4 to -25 ° C viscosity at 50 ° C 13 to 28 m Pas density at 50 ° C 0.94 to 0, 96 g / ml
  • b) fatty alcohol polyglycol ether with 6 to 8 EO cloud point according to DIN 53 917 66 to 74 ° C solidification point +12 to -16 ° C viscosity at 50 ° C 18 to 28 m Pas density at 50 ° C 0.96 to 0.98 g / ml contains.

In the suspension according to the invention, component A can be crystalline.

In formula I of component A, y can be a number from 1.3 to 4.

In a preferred embodiment, crystalline component A can be a type A zeolite.

In addition to water, the abovementioned compounds are the essential constituents of the suspension according to the invention. However, other ingredients may also be included, e.g. foam-suppressing additives or so-called solubilizers, i.e. Compounds that improve the solubility of the added dispersants in the aqueous phase. The usual foam-suppressing substances, for example foam-suppressing soap, silicone defoamers, foam-suppressing triazine derivatives, all of which are known and familiar to the expert, can be used as foam suppressors. Such an addition is generally not necessary; in the case of foaming dispersants, however, it may be desirable, especially when using higher amounts of alkylbenzenesulfonic acid.

It is generally not necessary to add solvent-containing substances, but it may be appropriate if the suspension according to the invention contains a hydrophilic, but sparingly water-soluble colloid, such as polyvinyl alcohol, as a stabilizing agent. It is advantageous e.g. a solubilizer - dimethyl sulfoxide is very suitable - if the use concentration of a stabilizer which is only slightly soluble in water is higher than about 1%. The proportion of the solubilizer in the total suspension can, for example, be of the same order of magnitude as the proportion of the stabilizing agent. Other compounds suitable as solubilizers are generally known to the expert; Hydrotrophic agents such as, for example, benzenesulfonic acid, toluenesulfonic acid, xylenesulfonic acid or their water-soluble salts or also octyl sulfate are suitable.

For all information on the "concentration of aluminum silicates" on the "solids content" or on the content of "active substance" (= AS), reference is made to the conditions of the aluminum silicates, which is reached after drying for one hour at 800 ° C. With this drying, both the adhering and the bound water are practically completely removed.

The aluminum silicates can be naturally occurring or else synthetically produced products, the synthetically produced products being preferred. They can be prepared, for example, by reacting water-soluble silicates with water-soluble aluminates in the presence of water. For this purpose, aqueous solutions of the starting materials can be mixed with one another or a component present in the solid state can be reacted with the other component present as an aqueous solution. The desired aluminum silicates are also obtained by mixing both components in the solid state in the presence of water. Aluminum silicates can also be produced from Al (OH) ₃ , A1 ₂ 0 ₃ or Si0 ₂ by reaction with alkali silicate or alkali aluminate solutions. The production can also be carried out by other known processes. In particular, the invention relates to aluminum silicates which have a three-dimensional space lattice structure.

Diese Summenformel umfaßt zwei Typen verschiedener Kirstallstrukturen (bzw. deren nicht kristalline Vorprodukte), die sich auch durch ihre Summenformeln unterscheiden. Es sind dies:

Die unterschiedlichen Kristallstrukturen zeigen sich im Röntgenbeugungsdiagramm.The preferred calcium binding capacity, which is approximately in the range from 100 to 200 mg CaO / g AS, usually around 100 to 180 mg CaO / g AS, is found above all in compounds of the composition:

This molecular formula comprises two types of different church structures (or their non-crystalline precursors), which also differ in their molecular formulas. They are:

The different crystal structures are shown in the X-ray diffraction diagram.

The crystalline aluminum silicate present in aqueous suspension can be separated from the remaining aqueous solution by filtration and dried. Depending on the drying conditions, the product contains more or less bound water. However, the aluminum silicates do not need to be dried at all after their preparation in order to prepare a suspension according to the invention; rather - and this is particularly advantageous - an aluminum silicate that is still moist from manufacture can be used.

The particle size of the individual aluminum silicate particles can be different and e.g. are in the range between 0.1 µm and 0.1 mm. This refers to the primary particle size, i.e. the size of the particles obtained during the precipitation and, if appropriate, the subsequent crystallization. It is particularly advantageous to use aluminum silicates which consist of at least 80% by weight of particles with a size of 10 to 0.01 μm, in particular of 8 to 0.1 μm.

These aluminum silicates preferably no longer contain primary or secondary particles with diameters above 45 μm. Secondary particles are particles that are formed by agglomeration of the primary particles into larger structures.

With regard to the agglomeration of the primary particles to form larger structures, the use of the aluminum silicates which are still moist from their production has been used to produce the inventive ones Suspensions have proven particularly useful since it has been found that the use of these still moist products practically completely prevents the formation of secondary particles.

In a particularly preferred embodiment of the invention, powdered zeolite of type A with a particularly defined particle spectrum is used as component A.

Such zeolite powder can according to DE-B-24 47 021, DE-B-25 17 218, DE-A-26 52 419, DE-A-26 51 420, DE-A-26 51 436, DE-A-26 51 437, DE-A-26 51 445 or DE-A-26 51 485 can be produced. They then have the particle distribution curves given there.

In a particularly preferred embodiment, a powdery zeolite of type A can be used, which has the particle size distribution described in DE-A-26 51 485.

The concentration of the aluminum silicates, in particular of the powdered zeolite A, can preferably be 44 to 53% by weight, in particular 46 to 52% by weight, based on the suspension, and more.

Component B - the dispersing component - consists of a mixture of at least: two different fatty alcohol polyglycol ethers. The mixing ratio of these fatty alcohol polyglycol ethers can be any.

Preferably, the mixing ratio - if no more than two fatty alcohol ethers are used - can be 7: 3 to 2: 8, i.e. 7 parts of ether a) to 3 parts of ether b) up to 2 parts of ether a) to 8 parts of ether b) of the formula B.

In a special embodiment, the mixing ratio can be 1: 1.

The concentration of component B in the aqueous suspension, based on the suspension, can preferably be from 1 to 2% by weight, in particular from 1.4 to 1.6% by weight. This concentration is sufficient to stabilize a suspension with a solids content of 50% by weight or more.

The suspension according to the invention has the advantage that it is stable to sedimentation in the temperature range from 10 to 50 ° C. and has a pumpable consistency.

A further advantage is that component B is liquid at room temperature and therefore does not need to be heated.

It is particularly advantageous that significantly higher solids contents of up to 53% by weight, based on the zeolite dried at 800 ° C., can be achieved in the suspension according to the invention.

In principle, the aqueous suspension according to the invention can contain, in addition to the constituents A and B mentioned and, in addition to any starting materials for the production of these constituents, substances which still remain, also further constituents in comparatively small amounts. If the suspension is to be further processed into detergents and cleaning agents, the additional substances present are expediently substances which are suitable as constituents of detergents and cleaning agents.

An indication of the stability of the suspension according to the invention is provided by a simple test in which the aluminum silicate suspension is produced in the desired concentration and which contains a dispersant according to the invention and optionally other substances, for example detergent components such as pentasodium triphosphate, in different amounts. The influence of the added substance can then be visually observed in the settling behavior of the suspension. After standing for 25 hours, the suspension should generally be at most so far removed that the protruding clear or silicate-free solution does not make up more than 20%, preferably not more than 10%, in particular not more than 6% of the total height. In general, the amount of additives should be kept so that the suspension can be pumped back into the storage container and pipe or hose lines again after 12 hours, preferably after 24 hours and in particular also after 48 hours. The settling behavior of the suspension, which may also contain other constituents, is checked at room temperature - with a total height of the suspension of 10 cm. They are perfectly pumpable even after 4 or 8 days. This information on the stability of the suspension also only gives indications; It depends on the individual case which suspension stability is to be set. When using the suspension according to the invention as a stock suspension for prolonged storage in a reservoir, from which it can be removed by pumping if necessary, it may be expedient to keep the proportion of other constituents, for example of detergents and cleaning agents, low or to dispense with them entirely.

The suspension can be prepared by simply mixing its constituents, the aluminum silicates e.g. can be used as such or - if necessary from the production stage - already moist or in an aqueous suspension. It is particularly advantageous to add aluminum silicates that are still moist from their manufacture, e.g. may be present as a filter cake to stir in component B.

However, it is of course also possible to use dried, i.e. Aluminum silicates freed from adhering water and possibly still containing water can be used.

The suspension according to the invention is characterized by high stability. It has a low viscosity, which is well below the viscosity of known suspensions, especially in the low temperature range. The rheopexic flow behavior is eliminated in the suspension according to the invention. Their stabilizing effect is particularly valuable in the case of aluminum silicates with particle sizes of 5 to 30 μm. It is pumpable so that it is easy to handle when wet Aluminum silicates enables. The suspension can be pumped around perfectly even after long interruptions in the pumping process. Due to its high stability, the suspension can also be transported in conventional tank and tank wagons without fear of the formation of unusable or disruptive residues. This makes the suspension ideal as a form of delivery of aluminum silicates for delivery to, for example, detergent manufacturers.

The suspension can be stored at room temperature or at higher temperatures, transported by piping, pumps or in some other way. The suspension is usually handled at temperatures between room temperature - usually preferred - and around 50 ° C.

The suspension according to the invention is particularly suitable for further processing to appear dry, pourable or free-flowing products, for example for the production of powdered water softeners, e.g. on the way of spray drying. The suspension is therefore of considerable importance in the production of powder detergents. There are no annoying residues when the aqueous suspension is fed to the drying apparatus. Furthermore, it has been shown that the suspension of the invention enables processing into extremely dust-free products.

Due to its particular stability, the suspension according to the invention is already as such, i.e. usable without further processing with or without further additives which have a growing, bleaching and / or cleaning effect, for example as water softeners, washing or cleaning agents and in particular as liquid abrasives with increased suspension stability.

A particularly important use of the suspension is the further processing into dry-appearing, free-flowing or free-flowing detergents and cleaning agents which contain further compounds in addition to the suspension components.

The suspension according to the invention is particularly suitable for the production of powder detergents.

To prepare these agents, an aqueous, flowable premix of the individual constituents of the agents is used and these are converted into a pourable product in the usual way. The aluminum silicates defined above are used in the form of the suspension according to the invention. The suspension according to the invention can be processed by any known method in the production of solid, pourable detergents and cleaning agents.

In particular, one proceeds in the production of powdery, free-flowing detergents and cleaning agents in such a way that a suspension according to the invention - for example from a storage container - is mixed with at least one washing, bleaching or cleaning component of the agent to be produced, and the mixture is then mixed by any method converted into the powdered product. A complexing agent is advantageously added, i.e. a compound that is able to complexly bind the alkaline earth metal ions responsible for water hardness, especially magnesium and calcium ions.

There are different variants in the manufacture of detergents and cleaning agents.

For example, the suspension according to the invention can be combined with substances capable of binding water of crystallization. This is expediently carried out by spraying the suspension onto the compounds which are capable of binding water of crystallization and which are present in a mixer, so that a solid, dry-appearing product is finally obtained with constant mixing. However, the suspension according to the invention is preferably mixed with at least one further compound having a washing, bleaching or cleaning action in the form of a "slurry" and subjected to spray drying. This shows further surprising advantages of the claimed aluminum silicate suspension. It has been shown that very low-dust products can be obtained when the suspension according to the invention is used in the spray drying. The products obtained by spray drying have a high calcium binding capacity and are easily wettable.

Detergents which have been produced using the suspension described above can be composed in various ways. In general, they contain at least one water-soluble surfactant which does not belong to the dispersants used according to the invention and which are present in the claimed aluminum silicate suspensions. In addition to at least one further compound which has a washing, bleaching or cleaning action and is inorganic or organic, they contain an aluminum silicate as defined above as a calcium-binding compound. In addition, other customary auxiliaries and additives, which are usually present in smaller amounts, can be present in such agents.

Examples

A zeolite A filter cake according to DE-A-26 51 485 is produced. The powdery zeolite of type A obtained in this way has the particle spectrum given there.

The zeolite A filter cake (component A) is stirred with a dissolver and then tempered to 45 ° C. in a 50 liter vessel. There the stabilizer (component B) is stirred in at 75-76 rpm with a MIG stirrer 15 ', the temperature of the slurry rising to 50 ° C.

The following substances are used as stabilizers (component B). The cloud points These stabilizers are determined according to DIN 53 917, page 3, point 8.2 10% in 25% butyl diglycol solution (BDG solution).

1. Ethoxylate A

• Isotridecyl alcohol ethoxylate 5 mol EO
• Cloud point 58 ° C
• Freezing point 0 ± 4 ° C
• Viscosity at 50 ° C 17 ± 4 m Pas
• Density at 50 ° C 0.95 g / ml

2. Ethoxylate B

• Isotridecyl alcohol ethoxylate 5 mol EO
• Cloud point 57 ° C
• Freezing point - 21 ± 4 ° C
• Viscosity at 50 ° C 24 ± 4 m Pas
• Density at 50 ° C, 0.95 g / ml

3. Ethoxylate C

• Isotridecyl alcohol ethoxylate 6.5 mol EO
• Cloud point 67 ° C
• Freezing point -12 ± 4 ° C
• Viscosity at 50 ° C 24 ± 4 m Pas
• Density at 50 ° C 0.97 g / ml

4. Ethoxylate D

• Isotridecyl alcohol ethoxylate 6.75 mol EO
• Cloud point 68 ° C
• Freezing point -1 ± 4 ° C
• Viscosity at 50 ° C 22 ± 4 m Pas
• Density at 50 ° C 0.97 g / ml

5. Ethoxylate E

• Isotridecyl alcohol ethoxylate 8 mol EO
• Cloud point 73 ° C
• Freezing point +12 ± 4 ° C
• Viscosity at 50 ° C 23 ± 4 m Pas
• Density at 50 ° C 0.98 g / ml

6. Ethoxylate F

• isotridecyl alcohol ethoxylate 8 mol EO
• Cloud point 74 ° C
• Freezing point -4 ± 4 ° C
• Viscosity at 50 ° C 24 ± 4 m Pas
• Density at 50 ° C 0.97 g / ml

For comparison purposes, additional comparison tests were carried out with the following isotridecyl alcohol ethoxylates. These ethoxylates differ from the ethoxylates used according to the invention primarily in their degree of ethoxylation and in their cloud point:

7. Ethoxylate G

• Isotridecyl alcohol ethoxylate 6 mol EO
• Cloud point 63 ° C
• Freezing point 5 ± 4 ° C
• Viscosity at 50 ° C 18 ± 4 m Pas
• Density at 50 ° C 0.96 g / ml

8. Ethoxylate H

• Isotridecyl alcohol ethoxylate 6 mol EO
• Cloud point 64 ° C
• Freezing point -14 ± 4 ° C
• Viscosity at 50 ° C 20 ± 4 m Pas
• Density at 50 ° C 0.95 g / ml

9. Ethoxylate I

• Isotridecyl alcohol ethoxylate 3 mol EO
• Cloud point 36 ° C
• Freezing point -8 ± 4 ° C
• Viscosity at 50 ° C 12 ± 4 mPas
• Density at 50 ° C 0.92 g / ml

10. Ethoxylate K

• Isotridecyl alcohol ethoxylate 3 mol EO
• Cloud point 34 ° C
• Freezing point <-25 ° C
• Viscosity at 50 ° C 15 ± 4 m Pas
• Density at 50 ° C 0.90 g / ml

11. Ethoxylate L

• Isotridecyl alcohol ethoxylate 9 mol EO
• Cloud point 78 ° C
• Freezing point + 2 ± 4 ° C
• Viscosity at 50 ° C 27 ± 4 m Pas
• Density at 50 ° C 1.0 g / ml

After prolonged storage at a constant temperature, the suspension obtained is assessed in relation to the clear phase via the settled solid, the homogeneity, the flow behavior and the sediment. The results are shown in the following tables:

Examples 1 to 10 are examples according to the invention:

Examples 11 to 22 are comparative examples:

viscosity

• bei 22°C von 288 m Pas
• bei 15°C von 766 m Pas
• bei 10°C von 1688 m Pas

Suspension stabilized with nonylphenol ethoxylate according to DE-A-32 09 631, Examples 23-25 has the viscosity

• at 22 ° C of 288 m Pas
• at 15 ° C of 766 m Pas
• at 10 ° C of 1688 m Pas

• bei 40°C von 143 m Pas
• bei 20°C von 146 m Pas
• bei 10°C von 173 m Pas

Suspension according to the invention according to Example 5 or 6 of the present invention has a viscosity

• at 40 ° C of 143 m Pas
• at 20 ° C of 146 m Pas
• at 10 ° C of 173 m Pas

Almost no change in viscosity is found.

Result:

The suspension according to the invention advantageously has a viscosity which is significantly lower than in the prior art.

It is particularly advantageous that the low viscosity remains almost unchanged even at low temperatures.

Claims (5)

1. Aqueous, pumpable stable suspension of a water insoluble silicate capable of binding calcium ions and containing a component acting as a dispersing agent, characterised in that in addition to water it contains, based on the total weight of the aqueuous suspension,

A) as water insoluble silicate capable of binding calcium, from 0.5 to 70% by weight of a finely divided, synthetically prepared, water insoluble, crystalline compound containing bound water and corresponding to the following general formula

wherein Cat denotes a cation of valency n replaceable by calcium, x denotes a number with a value from 0.7 to 1.5, Me denotes boron or aluminium and y denotes a number with a value from 0.8 to 6 and

B) as component having a dispersing action, from 0.5 to 6% by weight of a mixture of at least two different fatty alcohol polyglycol ethers based on an aliphatic C₁₃ alcohol, in particular isotridecyl alcohol, and ethylene glycol, characterised by the following data:

a) fatty alcohol polyglycol ether containing from 4.5 to 5.5 EO, turbidity point DIN 53 917 56 to 60°C, solidification point +4 to -25°C, viscosity at 50°C 13 to 28 mPas, density at 50°C 0.94 to 0.96 g/ml,

b) fatty alcohol polyglycol ether containing 6 to 8 EO, turbidity point according to DIN 53 917 66 to 74°C, solidification point +12 to -16°C, viscosity at 50°C 18 to 28 mPas, density at 50°C 0.96 to 0.98 g/ml.

2. Suspension according to Claim 1, characterised in that component A is crystalline.

3. Suspension according to Claim 1 or Claim 2, characterised in that in formula I of component A, y denotes a number from 1.3 to 4.

4. Suspension according to Claims 1 to 3, characterised in that component A is a zeolite A.

5. Use of the aqueous suspension according to Claims 1 to 4 for the preparation of pulverulent washing and cleaning agents.