GB1595769A - Spraydried detergent components - Google Patents
Spraydried detergent components Download PDFInfo
- Publication number
- GB1595769A GB1595769A GB4619476A GB4619476A GB1595769A GB 1595769 A GB1595769 A GB 1595769A GB 4619476 A GB4619476 A GB 4619476A GB 4619476 A GB4619476 A GB 4619476A GB 1595769 A GB1595769 A GB 1595769A
- Authority
- GB
- United Kingdom
- Prior art keywords
- spray
- slurry
- bulk density
- absorbent
- sodium bicarbonate
- 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
- 239000003599 detergent Substances 0.000 title claims description 13
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 40
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 28
- 239000002736 nonionic surfactant Substances 0.000 claims description 27
- 239000002002 slurry Substances 0.000 claims description 27
- 230000002745 absorbent Effects 0.000 claims description 26
- 239000002250 absorbent Substances 0.000 claims description 26
- 238000001694 spray drying Methods 0.000 claims description 23
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 20
- 235000017550 sodium carbonate Nutrition 0.000 claims description 20
- 239000000843 powder Substances 0.000 claims description 18
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 15
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 9
- 229920001577 copolymer Polymers 0.000 claims description 8
- XJRBAMWJDBPFIM-UHFFFAOYSA-N methyl vinyl ether Chemical compound COC=C XJRBAMWJDBPFIM-UHFFFAOYSA-N 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- HDFXRQJQZBPDLF-UHFFFAOYSA-L disodium hydrogen carbonate Chemical compound [Na+].[Na+].OC([O-])=O.OC([O-])=O HDFXRQJQZBPDLF-UHFFFAOYSA-L 0.000 claims description 6
- 229920000620 organic polymer Polymers 0.000 claims description 6
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000005273 aeration Methods 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims description 4
- UHZZMRAGKVHANO-UHFFFAOYSA-M chlormequat chloride Chemical compound [Cl-].C[N+](C)(C)CCCl UHZZMRAGKVHANO-UHFFFAOYSA-M 0.000 claims description 4
- 239000011363 dried mixture Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 2
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims description 2
- 238000000889 atomisation Methods 0.000 claims description 2
- 239000011230 binding agent Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 claims description 2
- 239000011976 maleic acid Substances 0.000 claims description 2
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims description 2
- 239000002861 polymer material Substances 0.000 claims description 2
- 235000020046 sherry Nutrition 0.000 claims description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims description 2
- 239000000945 filler Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000009472 formulation Methods 0.000 description 1
- 235000012149 noodles Nutrition 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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
- C11D11/02—Preparation in the form of powder by spray drying
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D7/00—Carbonates of sodium, potassium or alkali metals in general
- C01D7/38—Preparation in the form of granules, pieces or other shaped products
-
- 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
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/02—Inorganic compounds ; Elemental compounds
- C11D3/04—Water-soluble compounds
- C11D3/10—Carbonates ; Bicarbonates
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Materials Engineering (AREA)
- Detergent Compositions (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Description
(54) SPRAY-DRED DETERGENT COMPONENTS
(71) We, UNILEVER LIMITED, a British company, of Unilever House, Blackfriars,
London EC4, England, do hereby declare the invention for which we pray that a patent may be granted to us and the method by which it is to be performed, to be particularly described in and by the following statement:
This invention relates to a material prepared by spray-drying which is suitable for use as a filler in detergent compositions and also as an absorbent for nonionic surfactants.
It is now generally accepted in the detergents industry that the formulation of fabric washing powders so that the major detergentactive substance is a nonionic surfactant offers advantages, especially in the removal of oily soils from modem fabrics. Despite this generally acknowledged superiority some manufacturers have been reluctant to tum to nonionic-based detergent powders and it is considered that this reluctance is mainly occasioned by processing difficulties. It is difficulty to spray-dry crutcher slurries containing high levels of nonionic surfactants as they tend to autoxidise. Furthermore, unless special measures are taken the resultant powders tend to be of unacceptably high bulk density, and creepy rather than free-flowing.In order to overcome some of these difficulties it has been proposed to manufacture detergent powders containing nonionic surfactants by methods which involve incorporating part of the nonionic surfactant into the slurry and spray-drying it. The remainder of the nonionic surfactant is incorporated by means of an adjunct - a noodle or a marume for example, or by a route involving spraying a liquified or dissolved nonionic surfactant onto an absorbent.
It has proved very difficult to find an absorbent suitable for use in the manufacture of nonionic surfactants, since such absorbents must be capable of absorbing a useful loading of nonionic surfactant, say at least 25% by weight, must preferably be functional in the detergent composition and must be of a density such that when loaded with nonionic they do not separate from the remainder of the powder or cause the overall bulk density to be too high for the requirements of the market.
Furthermore, once these problems have been overcome the absorbent must fulfil one further criterion. It must be capable of withstanding the mechanical handling to which it will be subjected between the base of the spray drying tower and the packet without becoming tacky or breaking down into fines.
We have now discovered that a material suitable for use as an absorbent for nonionic surfactants can be obtained by spray-drying sodium carbonate mixed with sodium bicarbonate.
Accordingly, the present invention provides a process of preparing a material suitable for use as an absorbent for nonionic surfactants which comprises spray-drying a slurry consisting essentially of sodium carbonate and sodium bicarbonate, the weight ratio sodium carbonate to sodium bicarbonate being from
1.25:1 to 4.0:1.
In a preferred aspect the invention provides a spray-dried absorbent comprising a mixture of sodium carbonate and sodium bicarbonate in the weight ratio 1.25:1 to 4.0:1 having a bulk density of 0.25 to 0.65 gm/ml, particularly in the range 0.25-0.40 gm/ml, and a moisture content of 1.0 to 17.5%.
In another aspect, the invention provides a process for the manufacture of a fabric-washing detergent powder comprising the step of admixing a liquified nonionic surfactant, or a solution of a nonionic surfactant, with an absorbent as described above.
The invention also provides a pre-mix of a nonionic surfactant and an absorbent as described above.
We have also discovered that the spray-dried material produced by the process described above is useful as a filler not only in detergent compositions containing large amounts of nonionic surfactant, but also in other detergent compositions and that it can be used in place of conventional fillers such as sodium sulphate.
According to this aspect of the invention, there is provided a washing detergent composition comprising a spray-dried mixture as described above.
The bulk density and moisture content of the spray-dried mixture may be adjusted by conventional means known in the art.
For example, as described in "Spray-Drying" by K. Masters, published by Leonard Hill
Books, 1972, greater bulk density can be obtained by increasing the degree of atomization or by increasing the rate of feed of slurry to the spray-drying tower. Conversely bulk density can be reduced by aeration of the slurry, by raising the air inlet temperature or by increasing the slurry temperature.
Conditions such that the spray-dried sodium carbonate-sodium bicarbonate absorbent has a bulk density of 0.25 to 0.40 gms per litre are achieved when the cmtcher slurry temperature is from 40-70"C, and the temperature of the air at the inlet to the spray-drying tower is from 300 to 3750C.
Optionally, a film forming organic polymer may be included amongst the materials in the crutcher slurry, partly to facilitate aeration of the slurry and partly to act as a binder in the spray-dried material. The polymer may be present in an amount of from 0.2So to 1.5%.
A particularly preferred polymer material is a copolymer of vinyl methyl ether and maleic anhydride.
The invention will be further described in the following examples 1-4. Bulk densities are quoted grams/millilitre.
EXAMPLE I
A crutcher sherry was prepared by mixing the following components:
Parts by weight
Soda ash 26.5
Sodium bicarbonate 21.0
Vinyl methyl ether/maleic
anhydride copolymer (1:1)* 2.0
Water 50.5
* as 35% aqueous solution
This slurry was then aerated and spraydried in a spray-drying tower using a slurry temperature of 60 C, an air inlet temperature of 350"C and an outlet temperature of 112 C.
The resultant spray-dried powder had a bulk density of0.31 and a moisture content of 11.5%. This powder was found to absorb 28% by weight of Dobanol 25 7 EO, a liquid nonionic ethoxylated "Oxo" alcohol produced by Shell Chemicals Ltd., U.K. "Dobanol" is a registered trade mark.
EXAMPLE 2
The procedure of Example 1 was repeated using the following components:
Parts by weight
Soda ash 26.5
Sodium bicarbonate 21.0
Water 52.5
The resultant spray-dried powder had a bulk density of 0.33, a moisture content of 9.5% by weight and absorbed 28% by weight of the nonionic surfactant.
EXAMPLE 3
The procedure of Example 1 was repeated using the following components:
Parts by weight
Soda ash 35.5
Sodium bicarbonate 10.0
Vinyl methyl ether/maleic
anhydride copolymer (1: 1)* 2.0
Water 525.
* as 35% aqueous solution
The resultant spray-dried powder had a bulk density of 0.36, a moisture content of 8.5% and absorbed 28% by weight of the nonionic surfactant.
EXAMPLE 4
The procedure of Example 1 was repeated using the following components:
Parts by weight
Soda ash 35.5
Sodium bicarbonate 10.0
Water 54.5
The resultant spray-dried powder had a bulk density of 0.36 and absorbed more than 28% by weight of the nonionic surfactant.
WHAT WE CLAIM IS:
1. A process of preparing a material suitable for use as an absorbent for nonionic surfactants, which comprises spray-drying a slurry consisting essentially of sodium carbonate and sodium bicarbonate, the weight ratio sodium carbonate to sodium bicarbonate being from 1.25:1 to 4.0:1.
2. A process according to claim 1, wherein the conditions of spray-drying are such that the spray-dried sodium carbonate-sodium bicarbonate absorbent has a bulk density of 0.25 to 0.65 gm/ml.
3. A process according to claim 2, wherein the conditions of spray-drying are such that the spray-dried sodium carbonate-sodium bicarbonate absorbent has a bulk density of 0.25 to 0.40 gm/ml.
4. A process according to claim 1 wherein the temperature of the slurry which is spraydried is from 40-70"C.
5. A process according to claim 1 wherein the temperature of the air at the inlet to the spray-drying tower is from 300 to 3750C.
6. A process according to any one of the preceding claims, wherein the slurry also comprises from 0.2 to 1.5% by weight of a filmforming organic polymer.
7. A process according to claim 6, wherein the film-forming organic polymer is a copolymer of vinyl methyl ether and maleic acid.
8. A process of preparing a material suitable for use as an absorbent for nonionic surfactants which comprises spray-drying a slurry consisting essentially of sodium carbonate and sodium bicarbonate, substantially as hereinbefore described in any one of Examples 1, 2,3 or4.
9. A spray-dried absorbent comprising a mixture of sodium carbonate and sodium bicarbonate in the weight ratio 1.25:1 to 4.0:1,
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (14)
1. A process of preparing a material suitable for use as an absorbent for nonionic surfactants, which comprises spray-drying a slurry consisting essentially of sodium carbonate and sodium bicarbonate, the weight ratio sodium carbonate to sodium bicarbonate being from 1.25:1 to 4.0:1.
2. A process according to claim 1, wherein the conditions of spray-drying are such that the spray-dried sodium carbonate-sodium bicarbonate absorbent has a bulk density of 0.25 to 0.65 gm/ml.
3. A process according to claim 2, wherein the conditions of spray-drying are such that the spray-dried sodium carbonate-sodium bicarbonate absorbent has a bulk density of 0.25 to 0.40 gm/ml.
4. A process according to claim 1 wherein the temperature of the slurry which is spraydried is from 40-70"C.
5. A process according to claim 1 wherein the temperature of the air at the inlet to the spray-drying tower is from 300 to 3750C.
6. A process according to any one of the preceding claims, wherein the slurry also comprises from 0.2 to 1.5% by weight of a filmforming organic polymer.
7. A process according to claim 6, wherein the film-forming organic polymer is a copolymer of vinyl methyl ether and maleic acid.
8. A process of preparing a material suitable for use as an absorbent for nonionic surfactants which comprises spray-drying a slurry consisting essentially of sodium carbonate and sodium bicarbonate, substantially as hereinbefore described in any one of Examples 1, 2,3 or4.
9. A spray-dried absorbent comprising a mixture of sodium carbonate and sodium bicarbonate in the weight ratio 1.25:1 to 4.0:1,
having a bulk density of 0.25 to 0.65 gm/ml and a moisture content of from 1.0 to 17.5%.
10. A spray-dried absorbent according to claim 8, wherein the bulk density is from 0.25 to OA0 mg/ml.
11. A spray-dried absorbent substantially as hereinbefore described in any one of the
Examples.
12. A pre-mix suitable for the manufacture of a detergent powder comprising a nonionic surfactant and an absorbent according to any one of claims 9, 10 or 11.
13. A pre-mix suitable for the manufacture of a detergent powder comprising a nonionic surfactant and an absorbent produced by a process according to any one of claims 1 to 8.
14. A pre-mix substantially as hereinbefore described in any one of the Examples.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4619476A GB1595769A (en) | 1976-02-06 | 1976-02-06 | Spraydried detergent components |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4619476A GB1595769A (en) | 1976-02-06 | 1976-02-06 | Spraydried detergent components |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1595769A true GB1595769A (en) | 1981-08-19 |
Family
ID=10440239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4619476A Expired GB1595769A (en) | 1976-02-06 | 1976-02-06 | Spraydried detergent components |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1595769A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0221776A3 (en) * | 1985-11-01 | 1988-09-21 | Unilever Plc | Detergent compositions, components therefor, and processes for their preparation |
| EP0289312A2 (en) * | 1987-04-30 | 1988-11-02 | Unilever Plc | Process for the preparation of a granular detergent composition |
| EP0289311A2 (en) * | 1987-04-30 | 1988-11-02 | Unilever Plc | Process for the preparation of a granular detergent composition |
| US4826632A (en) * | 1986-10-20 | 1989-05-02 | Lever Brothers Company | Detergent compositions manufacturing process by spraying anionic/nonionic surfactant mix |
| EP0415472A2 (en) * | 1989-08-21 | 1991-03-06 | Unilever N.V. | Granulated bleach activator particles |
| US5108726A (en) * | 1988-08-19 | 1992-04-28 | Kerr-Mcgee Chemical Corporation | Compacts of spray dried water soluble compounds |
| US5151208A (en) * | 1986-04-14 | 1992-09-29 | Lever Brothers Company, Division Of Conopco, Inc. | Detergent powders and process for their preparation |
| US5518727A (en) * | 1993-04-27 | 1996-05-21 | Church & Dwight Co., Inc. | Ultrafine sodium bicarbonate powder |
| US6262010B1 (en) | 1998-11-20 | 2001-07-17 | Unilever Home & Personal Care Usa, A Division Of Conopco, Inc. | Particulate laundry detergent compositions containing nonionic surfactant granules |
| EP1170256A3 (en) * | 2000-07-05 | 2003-11-26 | Henkel Kommanditgesellschaft auf Aktien | Mechanically stable soda particles |
| EP2740786A1 (en) * | 2012-12-06 | 2014-06-11 | Solvay SA | Process for preparing detergent composition particles |
-
1976
- 1976-02-06 GB GB4619476A patent/GB1595769A/en not_active Expired
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4900466A (en) * | 1985-11-01 | 1990-02-13 | Lever Brothers Company | Process for preparing needle-shaped crystal growth modified burkeite detergent additive |
| EP0221776A3 (en) * | 1985-11-01 | 1988-09-21 | Unilever Plc | Detergent compositions, components therefor, and processes for their preparation |
| US5151208A (en) * | 1986-04-14 | 1992-09-29 | Lever Brothers Company, Division Of Conopco, Inc. | Detergent powders and process for their preparation |
| US4826632A (en) * | 1986-10-20 | 1989-05-02 | Lever Brothers Company | Detergent compositions manufacturing process by spraying anionic/nonionic surfactant mix |
| EP0289312A2 (en) * | 1987-04-30 | 1988-11-02 | Unilever Plc | Process for the preparation of a granular detergent composition |
| EP0289311A2 (en) * | 1987-04-30 | 1988-11-02 | Unilever Plc | Process for the preparation of a granular detergent composition |
| EP0289312A3 (en) * | 1987-04-30 | 1990-04-11 | Unilever Plc | Process for the preparation of a granular detergent composition |
| EP0289311A3 (en) * | 1987-04-30 | 1990-04-11 | Unilever Plc | Process for the preparation of a granular detergent composition |
| US5108726A (en) * | 1988-08-19 | 1992-04-28 | Kerr-Mcgee Chemical Corporation | Compacts of spray dried water soluble compounds |
| EP0415472A3 (en) * | 1989-08-21 | 1991-04-03 | Unilever Nv | Granulated bleach activator particles |
| EP0415472A2 (en) * | 1989-08-21 | 1991-03-06 | Unilever N.V. | Granulated bleach activator particles |
| US5518727A (en) * | 1993-04-27 | 1996-05-21 | Church & Dwight Co., Inc. | Ultrafine sodium bicarbonate powder |
| US6262010B1 (en) | 1998-11-20 | 2001-07-17 | Unilever Home & Personal Care Usa, A Division Of Conopco, Inc. | Particulate laundry detergent compositions containing nonionic surfactant granules |
| EP1170256A3 (en) * | 2000-07-05 | 2003-11-26 | Henkel Kommanditgesellschaft auf Aktien | Mechanically stable soda particles |
| EP2740786A1 (en) * | 2012-12-06 | 2014-06-11 | Solvay SA | Process for preparing detergent composition particles |
| WO2014086985A1 (en) * | 2012-12-06 | 2014-06-12 | Solvay Sa | Process for preparing detergent composition particles |
| CN104968775A (en) * | 2012-12-06 | 2015-10-07 | 索尔维公司 | Process for preparing detergent composition particles |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |