GB2189520A - Washing and bleaching process - Google Patents
Washing and bleaching process Download PDFInfo
- Publication number
- GB2189520A GB2189520A GB08607063A GB8607063A GB2189520A GB 2189520 A GB2189520 A GB 2189520A GB 08607063 A GB08607063 A GB 08607063A GB 8607063 A GB8607063 A GB 8607063A GB 2189520 A GB2189520 A GB 2189520A
- Authority
- GB
- United Kingdom
- Prior art keywords
- added
- bleaching
- addition
- alkalibooster
- washing
- 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.)
- Withdrawn
Links
- 238000005406 washing Methods 0.000 title claims abstract description 15
- 238000004061 bleaching Methods 0.000 title claims description 10
- 238000000034 method Methods 0.000 title claims description 8
- 239000007844 bleaching agent Substances 0.000 claims abstract description 26
- 239000003599 detergent Substances 0.000 claims abstract description 10
- 239000002243 precursor Substances 0.000 claims abstract description 7
- 239000004615 ingredient Substances 0.000 claims description 11
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000000203 mixture Substances 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 238000004453 electron probe microanalysis Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- KJPHTXTWFHVJIG-UHFFFAOYSA-N n-ethyl-2-[(6-methoxypyridin-3-yl)-(2-methylphenyl)sulfonylamino]-n-(pyridin-3-ylmethyl)acetamide Chemical compound C=1C=C(OC)N=CC=1N(S(=O)(=O)C=1C(=CC=CC=1)C)CC(=O)N(CC)CC1=CC=CN=C1 KJPHTXTWFHVJIG-UHFFFAOYSA-N 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical group OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- QISSLHPKTCLLDL-UHFFFAOYSA-N N-Acetylcaprolactam Chemical compound CC(=O)N1CCCCCC1=O QISSLHPKTCLLDL-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 125000000864 peroxy group Chemical group O(O*)* 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 229960002163 hydrogen peroxide Drugs 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000006072 paste Substances 0.000 description 1
- 239000003826 tablet Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/39—Organic or inorganic per-compounds
- C11D3/3902—Organic or inorganic per-compounds combined with specific additives
- C11D3/3905—Bleach activators or bleach catalysts
- C11D3/3907—Organic compounds
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
- D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
- D06L4/70—Multi-step processes
- D06L4/75—Multi-step processes combined with cleaning or washing
-
- C11D2111/44—
Abstract
In a washing process wherein the detergent and bleaching agents are separately dosed to the wash liquor by means of an automatic and sequential dosing programme, better detergency performance is achieved by separately adding an alkalibooster to the wash liquor, prior to the addition of the bleach system and after or together with the addition of detergent. Preferably the bleach system is added delayedly after the addition of the alkalibooster, and, if the bleach system comprises a peroxytype bleaching agent and a bleach precursor, the latter is added after the former has been added.
Description
SPECIFICATION
Improved washing and bleaching process
The present invention relates to an improved washing and bleaching process for fabrics, based on the principle of automatic/sequential dosing of various ingredients to the wash liquor during the washing process.
Washing processes, whereby the various ingredients are automatically and sequentially dosed to the wash liquor have already been described in the prior art, e.g. US Pat. 4,188,807 and 4,110,075. By such automatic and sequential dosing, more efficient use can be made in a washing machine adapted for such automatic/sequential dosing, of the various ingredients of a washing and bleaching composition and the energy consumption can be reduced.
Other proposals include continuously monitoring alkali and detergency values and automatically adding alkali or detergent in response to the monitoring signal to the wash liquor (GB Pat.
1,439,602), or controlling and sequentially dosing of additives to the wash liquor (GB Pat.
1,423,502) or dispensing separate unit doses of detergent components to the wash liquor (US
Pat. 4,365,853) but these proposals do not refer to a washing process combining the automatic and sequential dosing of the ingredients.
We have now found, that the performance of the above washing processes, which operate according to the automatic and sequential dosing principles as described e.g. in the above US
Patents 4,188,807 and 4,110,075 can be significantly improved by using a separate alkalibooster to be added automatically at the beginning of the wash cycle, after or together with the addition of a detergent composition but before the addition of a bleach system.
By this addition of a separate alkalibooster the pH profile in the beginning of the wash cycle can be adjusted as a function of the time which, when subsequently a bleach system is added, results in a significantly better bleach delivery and performance. As alkalibooster any suitable alkaline material can be used, sodium hydroxide being a preferred material.
It has furthermore been found that if the detergent composition which is added before or together with the addition of the alkalibooster contains enzymes, it is of significant advantage to delay the dosing of the bleach system after the addition of the alkalibooster. Thus, if the main wash cycle is carried out at 40"C, the bleaching system should be delayedly added, sometime after the addition of the alkalibooster, e.g. 5 miutes thereafter; if the main wash cycle is carried out at 60"C the bleach system should be added after the wash liquor has reached a temperature of abt. 50"C, and for a 90"C main wash cycle the bleach system should be added when the wash liquor has reached a temperature of abt. 60"C.
If the bleach system is a low temperature bleach system, consisting of a peroxy type bleaching agent and a bleach precursor, the bleach precursor is added after the peroxy type bleaching agent has been added; this will usually be the case for the main wash cycles at 40 and 60"C; for the 90"C main wash cycle a bleach precursor need not be used. A typical example of a suitable bleaching agent is hydrogenperoxide, and a suitable bleach precursor is Nacetylcaprolactam.
The above process is particularly suitable if the various ingredients are used in a liquid, pumpable form, but of course with the aid of appropriate dosing devices other physical forms such as powders, granules, tablets, pastes etc. can also be used.
The invention will further be illustrated by way of Example.
Example
In an automatic washing machine of the type as described in the above-mentioned US Patent 4,188,807 washing experiments were carried out using 4 kg clean wash load + several types of artificial soil, using water of 10" German hardness.
First a heavy duty liquid detergent was dosed, then sodium hydroxide as alkalibooster, subsequently the bleach system (H202 or H202 + acetylcaprolactam) and finally in the rinse cycle a fabric softening composition. For comparison purpose a single dosing system using a conventional heavy duty detergent powder was also included in the washing experiments. The moment of addition of the bleach system was varied, as was the wash temperature, as is shown in the table below. The data represent detergency values expressed as the difference in % reflectancy measurements before and after washing. The amounts of the ingredients dosed in all experiments were identical, and the amont of detergent powder used in the comparison was equivalent to the amounts, used in the multidosage system.The following results were obtained:
Wash temp. time of dosing of: % detergency on artificial soil: "C H202 acetylcaprolactam AS-10 AS-12 WFK 10C EMPA EMPA
114 116 60 directly at start directly at start 34.0 36.0 30.0 38.0 13.0 60 after 5 minutes directly after 34.0 35.0 30.0 34.0 28.0
addition of H202 60 at 50"C directly after 35.5 36.0 30.0 38.0 35.0
addition of H202 90 at 60"C no addition at all 38.5 38.5 33.0 39.0 41.0 comparison 60 at the start 33.0 33.0 32.5 36.0 18.0 90 at the start 37.0 37.0 34.0 42.5 21.5
The improved detergency is particularly pronounced on the EMPA 116 type of soil, which is a blood containing soil. In comparison with the first test and with the comparison test, the process of the invention showed unexpected benefits when first the alkalibooster is added, and subsequently after an interval the bleach system is added.
Claims (4)
1. A washing process comprising the automatic and sequential separate dosing of detergent and bleaching ingredients to a wash liquor, characterised in that an alkalibooster is added separately before the bleaching ingredient is added.
2. A process according to claim 1, characterised in that the bleaching ingredient is added delayedly after the addition of the alkalibooster.
3. A process according to claim 1, characterised in that the bleaching ingredient is added when the wash liquor has a temperature of about 50"C.
4. A process according to claims 1-3, characterised in that the bleaching ingredient comprises a peroxytype bleaching agent and a precursor therefor, whereby the precursor is added after the peroxytype bleaching agent has been added.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08607063A GB2189520A (en) | 1986-03-21 | 1986-03-21 | Washing and bleaching process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08607063A GB2189520A (en) | 1986-03-21 | 1986-03-21 | Washing and bleaching process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8607063D0 GB8607063D0 (en) | 1986-04-30 |
| GB2189520A true GB2189520A (en) | 1987-10-28 |
Family
ID=10595024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08607063A Withdrawn GB2189520A (en) | 1986-03-21 | 1986-03-21 | Washing and bleaching process |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2189520A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994028102A1 (en) * | 1993-05-20 | 1994-12-08 | The Procter & Gamble Company | Bleaching compounds comprising n-acyl caprolactam for use in hand-wash or other low-water cleaning systems |
| US5405412A (en) * | 1994-04-13 | 1995-04-11 | The Procter & Gamble Company | Bleaching compounds comprising N-acyl caprolactam and alkanoyloxybenzene sulfonate bleach activators |
| WO1996015710A1 (en) * | 1994-11-24 | 1996-05-30 | Unilever N.V. | A method and composition for warewashing without bleach |
| US5998350A (en) * | 1993-05-20 | 1999-12-07 | The Procter & Gamble Company | Bleaching compounds comprising N-acyl caprolactam and/or peroxy acid activators |
| US6197737B1 (en) | 1993-05-20 | 2001-03-06 | The Procter & Gamble Company | Bleaching compounds comprising substituted benzoyl caprolactam bleach activators |
| WO2003014458A1 (en) * | 2001-08-10 | 2003-02-20 | Henkel Kommanditgesellschaft Auf Aktien | Washing method |
| EP2711413A1 (en) * | 2012-09-25 | 2014-03-26 | Miele & Cie. KG | Washing agent and method for metering a washing agent |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB996193A (en) * | 1960-07-07 | 1965-06-23 | Henkel & Cie Gmbh | Process for the preparation of a washing and bleaching liquor for textiles |
| GB1439602A (en) * | 1972-06-21 | 1976-06-16 | ||
| US4110075A (en) * | 1975-12-04 | 1978-08-29 | Bosch-Siemens Hausgerate Gmbh | Process for washing textiles in an automatic washing machine, working substances and apparatus for its performance |
| US4188807A (en) * | 1975-12-04 | 1980-02-19 | Bosch-Siemens Hausgerate Gmbh | Automatic washing machine for textiles having separate containers for washing substances, meters and common pre-mix channel for metered substances |
-
1986
- 1986-03-21 GB GB08607063A patent/GB2189520A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB996193A (en) * | 1960-07-07 | 1965-06-23 | Henkel & Cie Gmbh | Process for the preparation of a washing and bleaching liquor for textiles |
| GB1439602A (en) * | 1972-06-21 | 1976-06-16 | ||
| US4110075A (en) * | 1975-12-04 | 1978-08-29 | Bosch-Siemens Hausgerate Gmbh | Process for washing textiles in an automatic washing machine, working substances and apparatus for its performance |
| US4188807A (en) * | 1975-12-04 | 1980-02-19 | Bosch-Siemens Hausgerate Gmbh | Automatic washing machine for textiles having separate containers for washing substances, meters and common pre-mix channel for metered substances |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994028102A1 (en) * | 1993-05-20 | 1994-12-08 | The Procter & Gamble Company | Bleaching compounds comprising n-acyl caprolactam for use in hand-wash or other low-water cleaning systems |
| US5998350A (en) * | 1993-05-20 | 1999-12-07 | The Procter & Gamble Company | Bleaching compounds comprising N-acyl caprolactam and/or peroxy acid activators |
| US6197737B1 (en) | 1993-05-20 | 2001-03-06 | The Procter & Gamble Company | Bleaching compounds comprising substituted benzoyl caprolactam bleach activators |
| CN1065563C (en) * | 1993-05-20 | 2001-05-09 | 普罗格特-甘布尔公司 | Bleaching compounds comprising N-acyl caprolactam for use in hand-wash or other low-water cleaning systems |
| US6352562B1 (en) | 1993-05-20 | 2002-03-05 | The Procter & Gamble Co. | Method of cleaning fabrics using bleaching compounds comprising substituted benzoyl caprolactam bleach activators |
| US5405412A (en) * | 1994-04-13 | 1995-04-11 | The Procter & Gamble Company | Bleaching compounds comprising N-acyl caprolactam and alkanoyloxybenzene sulfonate bleach activators |
| WO1996015710A1 (en) * | 1994-11-24 | 1996-05-30 | Unilever N.V. | A method and composition for warewashing without bleach |
| WO2003014458A1 (en) * | 2001-08-10 | 2003-02-20 | Henkel Kommanditgesellschaft Auf Aktien | Washing method |
| EP2711413A1 (en) * | 2012-09-25 | 2014-03-26 | Miele & Cie. KG | Washing agent and method for metering a washing agent |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8607063D0 (en) | 1986-04-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |