CA1185498A - Soap powders and a process for their manufacture - Google Patents
Soap powders and a process for their manufactureInfo
- Publication number
- CA1185498A CA1185498A CA000395451A CA395451A CA1185498A CA 1185498 A CA1185498 A CA 1185498A CA 000395451 A CA000395451 A CA 000395451A CA 395451 A CA395451 A CA 395451A CA 1185498 A CA1185498 A CA 1185498A
- Authority
- CA
- Canada
- Prior art keywords
- spray
- particles
- soap
- water
- microns
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D11/00—Special methods for preparing compositions containing mixtures of detergents ; Methods for using cleaning compositions
- C11D11/02—Preparation in the form of powder by spray drying
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
- C11D17/0039—Coated compositions or coated components in the compositions, (micro)capsules
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Detergent Compositions (AREA)
- Cosmetics (AREA)
Abstract
Abstract of Invention Spray dried or spray-cooled soap particles are coated with water-soluble inorganic substances, at least 80% of which are of a particle size below 100 microns. This improves wetting, dispersion and dissolution characteristics. The coating is particularly appropriate to soap particles containing substantial proportions of longer chain unsaturated soaps such as those derived from oleic acid, which tend to be softer than conventional tallow/coconut-derived materials.
Description
:
- 1 - cC1082 SO~P P~DERS ~
This invention relates to soap powders and to a process for preparing them.
The wetting, dispersion and solubility characteristics of soap powders are a continuing problem to the industry and much effort has been expended over the years in improving them. For example, it is disclosed in British Patent No 907,~9~ that granular soap compositions need to be Einely-divided to ensure rapid solution but that fines lead to clotting. This can be avoided, it is stated, by the addition of a sodium acetate or sodium benzoate anti-lumping agent in granular form. A different solution to this same problem of clotting is proposed in Unitecl States Patent No 2,940,935 in which an alkali metal xylene sulphonate and an alkali metal silicate or carbonate are incorporated into the soap-containing slurry prior to spray-dryin~.
We have now discovered that clottin~ o~ spray-dried soap powders can be reduced by coating the powder with a ~inely-divided water-soluble inorganic salt.
f~3~
- 1 - cC1082 SO~P P~DERS ~
This invention relates to soap powders and to a process for preparing them.
The wetting, dispersion and solubility characteristics of soap powders are a continuing problem to the industry and much effort has been expended over the years in improving them. For example, it is disclosed in British Patent No 907,~9~ that granular soap compositions need to be Einely-divided to ensure rapid solution but that fines lead to clotting. This can be avoided, it is stated, by the addition of a sodium acetate or sodium benzoate anti-lumping agent in granular form. A different solution to this same problem of clotting is proposed in Unitecl States Patent No 2,940,935 in which an alkali metal xylene sulphonate and an alkali metal silicate or carbonate are incorporated into the soap-containing slurry prior to spray-dryin~.
We have now discovered that clottin~ o~ spray-dried soap powders can be reduced by coating the powder with a ~inely-divided water-soluble inorganic salt.
f~3~
- 2 - cC1082 Accordingly, the present invention provides spray-dried particles comprising a major proportion of water-soluble soap and having an average diameter of 300-700 microns coate~ wit~ particles o~ an inorganic substance, characterised in tha-t the inorganic substance is water-soluble and that at least 80% by weight of its particles have an average diame~er of less than 100 microns.
Treatment of spray-dried soap particles with finely-divided inorganic salts has been suggested before, in United States Patent No 2,715,110. Ilowever the inventor found that the treatment led to no improvement in the agglomeration eharaeteristies of the soap powder and he conse~u~ntly rejeetcd it in Eavo~lr of a treatment with gaseous carbon dioxide. It is not clear why the ~reatmen-t with inorganic salt was found ineffective, but we believe it to have been a consequenee of the relative particle sizes o~ the spray-dried soap and the inorganic salt. The sizes whieh we specify are eritical to obtaining the effeet~
United States Patent No 2,592,535 also discloses the eoating of soap with hygroscopic salts, sueh as ~hosphates, to reduee loss of moisture ~rom spray-drie~ soap particles and consequenkly to reduce dusting. However the critical size relationships which we speeify are not referred to in this speeifieation either.
British Patent Nos 1,401,726 and 1,463,973 relate to partieles containing major proportions of soaps ancl lime-so~p dispersants sueh as ether sulphates. ~t was apparently Eound that the lime-soap dispersants adversely af~eeted the solubility properties of the soap particles ancl it was proposed to counteract that by impregnating them with smeetite elay partieles having a size below 50 microns. However sueh partieles are not water-soluble and so will rernain in suspension in the wash liquor, which may not be desirable.
Treatment of spray-dried soap particles with finely-divided inorganic salts has been suggested before, in United States Patent No 2,715,110. Ilowever the inventor found that the treatment led to no improvement in the agglomeration eharaeteristies of the soap powder and he conse~u~ntly rejeetcd it in Eavo~lr of a treatment with gaseous carbon dioxide. It is not clear why the ~reatmen-t with inorganic salt was found ineffective, but we believe it to have been a consequenee of the relative particle sizes o~ the spray-dried soap and the inorganic salt. The sizes whieh we specify are eritical to obtaining the effeet~
United States Patent No 2,592,535 also discloses the eoating of soap with hygroscopic salts, sueh as ~hosphates, to reduee loss of moisture ~rom spray-drie~ soap particles and consequenkly to reduce dusting. However the critical size relationships which we speeify are not referred to in this speeifieation either.
British Patent Nos 1,401,726 and 1,463,973 relate to partieles containing major proportions of soaps ancl lime-so~p dispersants sueh as ether sulphates. ~t was apparently Eound that the lime-soap dispersants adversely af~eeted the solubility properties of the soap particles ancl it was proposed to counteract that by impregnating them with smeetite elay partieles having a size below 50 microns. However sueh partieles are not water-soluble and so will rernain in suspension in the wash liquor, which may not be desirable.
- 3 ~ cC1082 As stated above the relationship of the particle size oE the water-soluble soap particle to that of the coatin~
particle of inorganic salt is an important feature o~ this invention. The average diameter of the soap particles can vary from 300-700 microns, preferably 500-600 microns, in ~hich case thc average diameter of the inorganic particles is such that at least 80% by weight of them are less than 1~0 microns, preferably less than 50 microns. The ratio of the diameter oF the soap particles to that of the coating particles is preferably from 6:1 to 8:1, most preferably 7:1.
The spray-dried soap-containing particles need not consist entirely of soap, but may contain up to 49~ by weight of other soap powder componentsO Examples of these are detergency builders, foam boosters or foam suppressants, powder structurants, anti-oxi~ants, softenillg agents and water. Preferably the particles comprise from 60-80% by weight of soap.
The term 'spray-dried' is used herein as a convenient shorthand. Soap powders are either produced by spray-drying in which a relatively cool slurry is sprayed lnto a hot dryiny gas, or by spray-cooling, in which hotter slurry is sprayed into relatively cold drying gas, and there are a number of intermediate processes which combine ~5 bott~ sprAy-drying and spray-cooling. All o~ these processes are included within the term 'spray-dried' as used herein.
Similarly, the term 'coatec~' is used herein to denote a situa~ on where a plurality of particles oE the watcr-soluble inor~anic substance are adherent to the spray-dried soap particles. It does not necessarily imply that so many are adherent that the soap particle is completely coated~ It is within the scope of the invention for i-t to be only par~ly so~
The nature oE the water-soluble soap is not critical to the invention. For economic reasons it will normally be ~ 4 - cC10~2 a sodium or potassium soap, but any other cation will be satisfactory provided that it is non toxic and does not cause unwanted sidc effects in the composition~ The fatty acid component oE the soap may be derived from mixtures of S saturated an~ partially unsatura~ed fatty acids in the C~-C~6 chain length region. Coconut oil and tallow, which are the traditional soap-making materials are preferred sources of the mixed fatty acids~ -the former containing predominantly C12 and C14 saturated fatty acids and the latter saturated Cl~ and Cl~ acids and mono-unsa-turated C16 acids. Mowever, the invention is also particularly applicable to soaps formed from fatty acid mixtures containing high proportions oE unsaturated acids such as oleic acid and linoleic acid. These soaps tend to be soft and creepy when in spray-dried form and the coating of the invention is especially suitable for improving their powder properties. Sunflower seed oil is an example o~ an oil which contains fatty acids of this type. When the spray-dried particles contain an unsaturated fatty acid having 16 or more carbon atoms then it is preferred that the content of this acid should be 25%
or more by weight of the particle.
The soap particles may also contain anionic surfactants in amounts up to 15% by weight oE the particle.
The nature of the anionic surfactant is not critical, any of the surEactants conventionally used or proposed for use in fabric washing powders being suitable. Examples oE
these are sodium alkyl benzene sulphonates, preferably Clo-Cl~ alkyl, sodium primary and secondary alkyl sulphate, preEerably ClO~C22 alkyl, olefine sulphonate salts and sodium alkane sulphonates.
The soap particles may also contain nonionic surfactants in amounts up to about 306 by weight of the particles. Ethox~lated and propoxylated primary and secondary alcohols are the preferred nonionic surfactants, primary alcohols containin~ 7 to 25 carbon atoms ~ 5 ~ cC1082 ethoxylated with from 5 to 30 moles of ethylene oxide per mole oE alcohol being most preferred.
As has been sai~, the invention is particularly applicable to spray-dried particles which are soft, and exam~les of components which may make ~he par~icl~s soft are polyethylene glycols, ethoxylated alkanolamides, alkyl phosphoric acid esters and qua-ternary ammonium salts.
The water-soluble inorganic salt for coating the spray-dried soap particles is preferably present in an amount oE Erom 3 to 25% by weight of the total soap powder ~ormulation. The lower amount is the general level which will normally be used when the salt is only performing a coating function, whereas the upper amount is the maximum amount which will normally be used when the sal~ performs a function in addition to coating, such as deter~ency building or bleaching.
Examples of suitable salts, within which term are included oxides as well as oxyacid salts, are the water-soluble phosphates, carbonates, percarbonates, borates, perborates, sulphates and metasilicates and aluminosilicates, particularly the sodium and potassium salts. In addition to the inorganic compounds referred to above, but not as an alternative to them, certain organic compounds can be uscd Eor coating. Examples of such compounds are the salts of nitrilotriacetic acid, preferably sodium nitrilotriacetate, and tetraacetyl ethylene diamine.
The invention provides, in a second aspect, a process Eor the manufacture of spray-dried particles comprising a major proportion of a water-soluble soap inorganic substance, at least 80% o~ which have an average diameter of less than 100 microns, characterised by forming a mixture of the two types of particle, imparting relative motion to them and spraying them with an aqueous solution of a binder.
The nature of the binder, which ensures adhesion - 6 - cC1082 between the spray-dried soap particles and the inorganic salt particles is not critical, conventional binders such as water, sodium silicate solution and sodium carboxymethyl cellulose solution being satisfactory. In the case of sodium silicate solution, 3-10~ by weicJht based on the ~otal soap powder composition, in the form oE a 20-60% w/v solution, would be a typical amount of binder to be used.
It is possible to perform the process of the invention in a number of the conventional granulating apparatus. One such apparatus is the Eirich pan (registered trade mark) which is an inclined pan rotatable about its major axis.
Another is the Schugi mixer (registered trade mark) whlch consists of a cylindrical chamber provided with inclined ribbon-like mixing bLades rotatable about the major axis of the cylinderO Whichever of these apparatus is used, the coated particles will require drying in a fluidised bed through which warm air is pumped, so since it is necessary to have a ~luidised bed apparatus available and since it is possible to carry out the coating process ab initio in a fluidised bed, it is preferred to carry out the process in that way.
In the following Example, a process of coating in accordance with the invention is described.
~5 Example Spray-dried particles con-taining a major proportion of soap ancl having the composi-tion shown below were prepared by conventional slurry-making and spray-drying techniques in two size ranges, 450 and 350 microns. The resultant particles are subsequently referred to as 'core particles'.
5~3~
~ 7 - cC1082 Parts by Weight Sodium soap (28.5% lauric acid) 42.0 Coconut oil monoethanolamide2.6 Magnesium sulphate 0-5 Ethylene diamine tetra acetic acid 0.13 L~ree ~att~ aci~s 2.17 ~ater 6.5 A mixture of finely-divided inorganic salts suitable for forming a coating on the above spray-dried pa-cticles was then prepared. The composition is shown below Parts Sodium tripolyphosphate 12.0 Sodium carbonate 2.6 Sodium carboxymethyl cellulose 0.5 The core particles and the mixture of inorganic salts, together with 25 parts of sodium perborate were then placed in an Anhydro (registered trade mark) fluidised bed and sprayed with a 30% w/v aqueous solution of sodium silicate (Na20:SiO2, 2:1)~
In a second experiment the core particles, the mixture oE inorganic salts and sodium perborate were fed to a Schugi cylinder mixer and sprayed wi~h the sodiu~ silicate solution.
The coa-ted particles obtained had good flow properties, a narrow particle size distribution and a bulk density of around 0.4 g/cc.
The wetting, dispersion and dissolution properties oE
the coated particles were then assessed as Eollows.
A standard weight of powder was poured onto the surEace oE hot water (40C) in a hand bowl and swirled round. The resultant wash liquor was then scored for wetting (ie whether the powder was floating on the surface or had sunk), dispersion (ie whether clots had formed) and dissolution on a score of 0 to 5, 5 beiny the best score.
This scoring procedure was carried out by a panel of skilled assessors, and the scores given were averaged.
- 8 - cC1082 The results are shown in Table 1.
Table 1 ~lettiny (I~), Dispersion ~Dp) and Dissolution ~Ds) Tes~ Results Core Particle Size 450 ~icrons 350 microns W Dp Ds _ _ _ Dp Ds Core Particles 3 3 3 3 4 4 (uncoated) 15 Coated Particles ex cy:linder mixer 5 5 4 5 4 4 (Schugi) ex Eluidised bed 5 5 4 5 4 4 (Anhydro) _ _ ~ _ _ _ _ :[t can be seen Erom the above results that all of the coated particles are as good as or superior to the uncoated ones in wetting, dispersing and dissolving propertiesO The superiority is more marked with the larger core particles, and we have evidence that this is a general trend. The increase .in the wetting scores of the coated par~icles in accordance with the invention is especially significant because this indicates that less powder floats on the surEace of the water in a clot.
particle of inorganic salt is an important feature o~ this invention. The average diameter of the soap particles can vary from 300-700 microns, preferably 500-600 microns, in ~hich case thc average diameter of the inorganic particles is such that at least 80% by weight of them are less than 1~0 microns, preferably less than 50 microns. The ratio of the diameter oF the soap particles to that of the coating particles is preferably from 6:1 to 8:1, most preferably 7:1.
The spray-dried soap-containing particles need not consist entirely of soap, but may contain up to 49~ by weight of other soap powder componentsO Examples of these are detergency builders, foam boosters or foam suppressants, powder structurants, anti-oxi~ants, softenillg agents and water. Preferably the particles comprise from 60-80% by weight of soap.
The term 'spray-dried' is used herein as a convenient shorthand. Soap powders are either produced by spray-drying in which a relatively cool slurry is sprayed lnto a hot dryiny gas, or by spray-cooling, in which hotter slurry is sprayed into relatively cold drying gas, and there are a number of intermediate processes which combine ~5 bott~ sprAy-drying and spray-cooling. All o~ these processes are included within the term 'spray-dried' as used herein.
Similarly, the term 'coatec~' is used herein to denote a situa~ on where a plurality of particles oE the watcr-soluble inor~anic substance are adherent to the spray-dried soap particles. It does not necessarily imply that so many are adherent that the soap particle is completely coated~ It is within the scope of the invention for i-t to be only par~ly so~
The nature oE the water-soluble soap is not critical to the invention. For economic reasons it will normally be ~ 4 - cC10~2 a sodium or potassium soap, but any other cation will be satisfactory provided that it is non toxic and does not cause unwanted sidc effects in the composition~ The fatty acid component oE the soap may be derived from mixtures of S saturated an~ partially unsatura~ed fatty acids in the C~-C~6 chain length region. Coconut oil and tallow, which are the traditional soap-making materials are preferred sources of the mixed fatty acids~ -the former containing predominantly C12 and C14 saturated fatty acids and the latter saturated Cl~ and Cl~ acids and mono-unsa-turated C16 acids. Mowever, the invention is also particularly applicable to soaps formed from fatty acid mixtures containing high proportions oE unsaturated acids such as oleic acid and linoleic acid. These soaps tend to be soft and creepy when in spray-dried form and the coating of the invention is especially suitable for improving their powder properties. Sunflower seed oil is an example o~ an oil which contains fatty acids of this type. When the spray-dried particles contain an unsaturated fatty acid having 16 or more carbon atoms then it is preferred that the content of this acid should be 25%
or more by weight of the particle.
The soap particles may also contain anionic surfactants in amounts up to 15% by weight oE the particle.
The nature of the anionic surfactant is not critical, any of the surEactants conventionally used or proposed for use in fabric washing powders being suitable. Examples oE
these are sodium alkyl benzene sulphonates, preferably Clo-Cl~ alkyl, sodium primary and secondary alkyl sulphate, preEerably ClO~C22 alkyl, olefine sulphonate salts and sodium alkane sulphonates.
The soap particles may also contain nonionic surfactants in amounts up to about 306 by weight of the particles. Ethox~lated and propoxylated primary and secondary alcohols are the preferred nonionic surfactants, primary alcohols containin~ 7 to 25 carbon atoms ~ 5 ~ cC1082 ethoxylated with from 5 to 30 moles of ethylene oxide per mole oE alcohol being most preferred.
As has been sai~, the invention is particularly applicable to spray-dried particles which are soft, and exam~les of components which may make ~he par~icl~s soft are polyethylene glycols, ethoxylated alkanolamides, alkyl phosphoric acid esters and qua-ternary ammonium salts.
The water-soluble inorganic salt for coating the spray-dried soap particles is preferably present in an amount oE Erom 3 to 25% by weight of the total soap powder ~ormulation. The lower amount is the general level which will normally be used when the salt is only performing a coating function, whereas the upper amount is the maximum amount which will normally be used when the sal~ performs a function in addition to coating, such as deter~ency building or bleaching.
Examples of suitable salts, within which term are included oxides as well as oxyacid salts, are the water-soluble phosphates, carbonates, percarbonates, borates, perborates, sulphates and metasilicates and aluminosilicates, particularly the sodium and potassium salts. In addition to the inorganic compounds referred to above, but not as an alternative to them, certain organic compounds can be uscd Eor coating. Examples of such compounds are the salts of nitrilotriacetic acid, preferably sodium nitrilotriacetate, and tetraacetyl ethylene diamine.
The invention provides, in a second aspect, a process Eor the manufacture of spray-dried particles comprising a major proportion of a water-soluble soap inorganic substance, at least 80% o~ which have an average diameter of less than 100 microns, characterised by forming a mixture of the two types of particle, imparting relative motion to them and spraying them with an aqueous solution of a binder.
The nature of the binder, which ensures adhesion - 6 - cC1082 between the spray-dried soap particles and the inorganic salt particles is not critical, conventional binders such as water, sodium silicate solution and sodium carboxymethyl cellulose solution being satisfactory. In the case of sodium silicate solution, 3-10~ by weicJht based on the ~otal soap powder composition, in the form oE a 20-60% w/v solution, would be a typical amount of binder to be used.
It is possible to perform the process of the invention in a number of the conventional granulating apparatus. One such apparatus is the Eirich pan (registered trade mark) which is an inclined pan rotatable about its major axis.
Another is the Schugi mixer (registered trade mark) whlch consists of a cylindrical chamber provided with inclined ribbon-like mixing bLades rotatable about the major axis of the cylinderO Whichever of these apparatus is used, the coated particles will require drying in a fluidised bed through which warm air is pumped, so since it is necessary to have a ~luidised bed apparatus available and since it is possible to carry out the coating process ab initio in a fluidised bed, it is preferred to carry out the process in that way.
In the following Example, a process of coating in accordance with the invention is described.
~5 Example Spray-dried particles con-taining a major proportion of soap ancl having the composi-tion shown below were prepared by conventional slurry-making and spray-drying techniques in two size ranges, 450 and 350 microns. The resultant particles are subsequently referred to as 'core particles'.
5~3~
~ 7 - cC1082 Parts by Weight Sodium soap (28.5% lauric acid) 42.0 Coconut oil monoethanolamide2.6 Magnesium sulphate 0-5 Ethylene diamine tetra acetic acid 0.13 L~ree ~att~ aci~s 2.17 ~ater 6.5 A mixture of finely-divided inorganic salts suitable for forming a coating on the above spray-dried pa-cticles was then prepared. The composition is shown below Parts Sodium tripolyphosphate 12.0 Sodium carbonate 2.6 Sodium carboxymethyl cellulose 0.5 The core particles and the mixture of inorganic salts, together with 25 parts of sodium perborate were then placed in an Anhydro (registered trade mark) fluidised bed and sprayed with a 30% w/v aqueous solution of sodium silicate (Na20:SiO2, 2:1)~
In a second experiment the core particles, the mixture oE inorganic salts and sodium perborate were fed to a Schugi cylinder mixer and sprayed wi~h the sodiu~ silicate solution.
The coa-ted particles obtained had good flow properties, a narrow particle size distribution and a bulk density of around 0.4 g/cc.
The wetting, dispersion and dissolution properties oE
the coated particles were then assessed as Eollows.
A standard weight of powder was poured onto the surEace oE hot water (40C) in a hand bowl and swirled round. The resultant wash liquor was then scored for wetting (ie whether the powder was floating on the surface or had sunk), dispersion (ie whether clots had formed) and dissolution on a score of 0 to 5, 5 beiny the best score.
This scoring procedure was carried out by a panel of skilled assessors, and the scores given were averaged.
- 8 - cC1082 The results are shown in Table 1.
Table 1 ~lettiny (I~), Dispersion ~Dp) and Dissolution ~Ds) Tes~ Results Core Particle Size 450 ~icrons 350 microns W Dp Ds _ _ _ Dp Ds Core Particles 3 3 3 3 4 4 (uncoated) 15 Coated Particles ex cy:linder mixer 5 5 4 5 4 4 (Schugi) ex Eluidised bed 5 5 4 5 4 4 (Anhydro) _ _ ~ _ _ _ _ :[t can be seen Erom the above results that all of the coated particles are as good as or superior to the uncoated ones in wetting, dispersing and dissolving propertiesO The superiority is more marked with the larger core particles, and we have evidence that this is a general trend. The increase .in the wetting scores of the coated par~icles in accordance with the invention is especially significant because this indicates that less powder floats on the surEace of the water in a clot.
Claims (8)
OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Spray-dried particles comprising a major proportion of water-soluble soap and having an average diameter of 300-700 microns coated with particles of an inorganic substance, characterised in that the inorganic substance is water-soluble and that at least 80% by weight of its particles have an average diameter of less than 100 microns.
2. Spray-dried particles according to claim 1 wherein the ratio of the diameter of the spray-dried particles to that of the particles of the inorganic substance is from 6:1 to 8:1.
3. Spray-dried particles according to claim 1 wherein the water-soluble soap comprises an unsaturated fatty acid having 16 or more carbon atoms.
4. Spray-dried particles according to claim 1, 2 or 3 wherein the organic substance is a water-soluble phosphate, carbonate, borate, sulphate or metasilicate salt.
5. Spray-dried particles according to claim 1 wherein the particles of the inorganic substance are attached to the soap particle with the aid of a binder.
6. Spray-dried particles according to claim 5 wherein the binder comprises an aqueous solution of a sodium carboxymethyl cellulose or of sodium silicate.
7. A process for the manufacture of spray-dried particles comprising a major proportion of a water-soluble soap and having an average diameter of 300-700 microns coated with particles of an inorganic substance, at least 80% of which have an average diameter of less than 100 microns, characterised by forming a mixture of the two types of particle, imparting relative motion to them and spaying them with an aqueous solution of a binder.
8. A process according to claim 7 wherein relative motion is imparted to the particles by formulation of a fluidised bed.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8103444 | 1981-02-04 | ||
| GB8103444 | 1981-02-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1185498A true CA1185498A (en) | 1985-04-16 |
Family
ID=10519451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000395451A Expired CA1185498A (en) | 1981-02-04 | 1982-02-03 | Soap powders and a process for their manufacture |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP0057611A3 (en) |
| AR (1) | AR225710A1 (en) |
| BR (1) | BR8200575A (en) |
| CA (1) | CA1185498A (en) |
| ES (1) | ES8302082A1 (en) |
| GR (1) | GR76050B (en) |
| NO (1) | NO820321L (en) |
| PT (1) | PT74385B (en) |
| ZA (1) | ZA82687B (en) |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4466897A (en) * | 1981-09-29 | 1984-08-21 | Lever Brothers Company | Process for the manufacture of soap powder |
| DE4438850A1 (en) * | 1994-11-02 | 1996-05-09 | Henkel Kgaa | Solid recyclable preparations for multi-stage textile washing |
| WO2000037604A1 (en) * | 1998-12-22 | 2000-06-29 | The Procter & Gamble Company | Process for preparing a granular detergent composition |
| US6596683B1 (en) | 1998-12-22 | 2003-07-22 | The Procter & Gamble Company | Process for preparing a granular detergent composition |
| US6858572B1 (en) | 1999-03-09 | 2005-02-22 | The Procter & Gamble Company | Process for producing coated detergent particles |
| US7022660B1 (en) | 1999-03-09 | 2006-04-04 | The Procter & Gamble Company | Process for preparing detergent particles having coating or partial coating layers |
| JP2002538292A (en) * | 1999-03-09 | 2002-11-12 | ザ、プロクター、エンド、ギャンブル、カンパニー | Detergent particles having a coating or partial coating layer |
| DE10152161A1 (en) * | 2001-10-25 | 2003-05-15 | Henkel Kgaa | Means and device and method for its production |
| EP1798280B1 (en) * | 2004-08-11 | 2012-10-24 | Nof Corporation | Powder soap composition |
| DE102006056534B4 (en) * | 2006-11-27 | 2008-07-31 | "Durable" Hunke & Jochheim Gmbh & Co. Kg | clamp binder |
| CN103180427B (en) * | 2010-10-14 | 2016-02-17 | 荷兰联合利华有限公司 | The packaging of detergent composition and distribution |
| ES2542240T3 (en) | 2010-10-14 | 2015-08-03 | Unilever N.V. | Manufacture of coated particulate detergents |
| CA2813791C (en) | 2010-10-14 | 2020-07-28 | Unilever Plc | Laundry detergent particles |
| WO2012049033A1 (en) * | 2010-10-14 | 2012-04-19 | Unilever Plc | Top-loading laundry vessel method |
| CA2813789C (en) | 2010-10-14 | 2020-07-21 | Unilever Plc | Laundry detergent particles |
| US8883702B2 (en) | 2010-10-14 | 2014-11-11 | Conopco, Inc. | Packaged particulate detergent composition |
| PL2627754T3 (en) | 2010-10-14 | 2017-06-30 | Unilever N.V. | Laundry detergent particles |
| EP2627758B1 (en) | 2010-10-14 | 2016-11-02 | Unilever PLC | Laundry detergent particles |
| MX2013003934A (en) | 2010-10-14 | 2013-06-28 | Unilever Nv | Particulate detergent compositions comprising fluorescer. |
| BR112013009132B1 (en) | 2010-10-14 | 2021-12-14 | Unilever Ip Holdings B.V. | COATED DETERGENT PARTICLE AND PLURALITY OF COATED DETERGENT PARTICLES |
| DE202013001479U1 (en) | 2013-02-15 | 2013-04-23 | Companycreator Gmbh | Clamping folder with clamping device for the jolt-free and resistance-free insertion of documents. |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2592535A (en) * | 1941-08-01 | 1952-04-15 | Lever Brothers Ltd | Process of dedusting soap and the resulting product |
| US2715110A (en) * | 1952-06-13 | 1955-08-09 | Lever Brothers Ltd | Method for the production of a granulated soap product |
| JPS5229761B2 (en) * | 1972-08-17 | 1977-08-04 | ||
| GB2027048B (en) * | 1978-08-03 | 1983-05-05 | Unilever Ltd | Soap compositions |
-
1982
- 1982-02-02 ES ES509268A patent/ES8302082A1/en not_active Expired
- 1982-02-02 GR GR67183A patent/GR76050B/el unknown
- 1982-02-02 EP EP82300529A patent/EP0057611A3/en not_active Ceased
- 1982-02-03 PT PT74385A patent/PT74385B/en unknown
- 1982-02-03 CA CA000395451A patent/CA1185498A/en not_active Expired
- 1982-02-03 ZA ZA82687A patent/ZA82687B/en unknown
- 1982-02-03 NO NO820321A patent/NO820321L/en unknown
- 1982-02-03 BR BR8200575A patent/BR8200575A/en unknown
- 1982-02-04 AR AR288340A patent/AR225710A1/en active
Also Published As
| Publication number | Publication date |
|---|---|
| ES509268A0 (en) | 1982-12-16 |
| EP0057611A3 (en) | 1982-08-25 |
| NO820321L (en) | 1982-08-05 |
| EP0057611A2 (en) | 1982-08-11 |
| PT74385B (en) | 1984-10-22 |
| ZA82687B (en) | 1983-09-28 |
| PT74385A (en) | 1982-03-01 |
| GR76050B (en) | 1984-08-03 |
| ES8302082A1 (en) | 1982-12-16 |
| AR225710A1 (en) | 1982-04-15 |
| BR8200575A (en) | 1982-12-07 |
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