EP0119746B1 - Procédé pour la manufacture de poudre détergente - Google Patents

Procédé pour la manufacture de poudre détergente Download PDF

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Publication number
EP0119746B1
EP0119746B1 EP84301006A EP84301006A EP0119746B1 EP 0119746 B1 EP0119746 B1 EP 0119746B1 EP 84301006 A EP84301006 A EP 84301006A EP 84301006 A EP84301006 A EP 84301006A EP 0119746 B1 EP0119746 B1 EP 0119746B1
Authority
EP
European Patent Office
Prior art keywords
photobleach
powder
solution
suspension
accordance
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
Application number
EP84301006A
Other languages
German (de)
English (en)
Other versions
EP0119746A1 (fr
Inventor
Timothy David Finch
Raymond John Wilde
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unilever PLC
Unilever NV
Original Assignee
Unilever PLC
Unilever NV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Unilever PLC, Unilever NV filed Critical Unilever PLC
Priority to AT84301006T priority Critical patent/ATE20536T1/de
Publication of EP0119746A1 publication Critical patent/EP0119746A1/fr
Application granted granted Critical
Publication of EP0119746B1 publication Critical patent/EP0119746B1/fr
Expired legal-status Critical Current

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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
    • C11D3/0005—Other compounding ingredients characterised by their effect
    • C11D3/0063—Photo- activating compounds

Definitions

  • This invention relates to a process for manufacturing detergent powder containing a photobleach.
  • Photobleaches are now being introduced into washing powders, particularly into those sold in the sunnier countries of Europe and in South America.
  • the most convenient way of incorporating photobleaches such as zinc or aluminium phthalocyanine sulphonate into detergent powders prepared by spray-drying would be to incorporate them into the aqueous crutcher slurry, together with other components such as detergent active compound and builders.
  • this method is used in practice, loss of photobleach occurs, and the resulting powder has poor stability during storage.
  • a process for the manufacture of a particulate detergent fabric washing product which comprises forming a spray-dried or granulated base powder and combining it with a photobleach compound, characterised in that the combination is effected by spraying a solution or suspension of the photobleach onto a powder comprising the base powder.
  • European patent application No 0 057 088 discloses spraying an aqueous solution of an amorphous phosphate onto a mixture of a storage-sensitive detergent additive, such as a photobleach, and a hydratable salt.
  • a storage-sensitive detergent additive such as a photobleach
  • the present invention provides a generally applicable process for incorporation of a photobleach into spray-dried or granulated powders without loss during processing or subsequent storage.
  • photobleaches One of the key properties of photobleaches is their ability to sorb onto the fibres of an article. This property is extremely concentration dependent and is also sensitive to modifications in molecular structure, which are believed to occur when photobleaches are incorporated into a crutcher slurry. In order to make good what would amount to a loss of the original photobleach, were it decided to process powder by including photo bleach in the slurry, it would be necessary to increase the initial concentration to obtain the desired performance in the spray-dried product. That would be an extremely expensive measure. Even that would not counteract the loss which occurs during storage when photobleach is incorporated into a powder by a slurry-making and spray-drying route.
  • the photobleach is a zinc or aluminium phthalocyanine sulphonate and that it is sprayed onto the spray-dried or granulated base powder in aqueous solution or suspension. While the solution or suspension may be of any desired concentration, better control of the amount of photobleach incorporated into the powder is achieved if it is very dilute, for example 0.001 to 0.2% by weight.
  • the solution or suspension may de sprayed onto the spray-dried or granulated powder in any desired fashion, for example in an inclined pan granulator such as an Eirich pan (trade mark), in a fluidised bed or rotating drum mixer, or onto the powder on a moving belt, or in a curtain as it falls from one level in the plant to another.
  • an inclined pan granulator such as an Eirich pan (trade mark)
  • a fluidised bed or rotating drum mixer or onto the powder on a moving belt, or in a curtain as it falls from one level in the plant to another.
  • the solution or suspension preferably contains an inorganic acid salt such as sodium dihydrogen phosphate, sodium bicarbonate and sodium bisulphate, which has been discovered to improve the physical properties of the sprayed powder.
  • an inorganic acid salt such as sodium dihydrogen phosphate, sodium bicarbonate and sodium bisulphate, which has been discovered to improve the physical properties of the sprayed powder.
  • the major components of the fabric washing product in accordance with the invention are one or more anionic and/or nonionic surfactants and one or more detergency builders, together with a number of optional components.
  • Typical anionic detergent active compounds which may be present in amounts of from about 2 to 35% by weight of the finished compositions are sodium alkylbenzene sulphonates, preferably the do-Cie alkyl compounds, sodium primary and secondary alkyl sulphates, preferably the C i o-C 22 alkyl sulphates, sodium olefine sulphonates, preferably the C io -C i8 sulphonates and sodium alkane sulphonates. Soaps of fatty acids may also be present, preferably the sodium and potassium salts of Cio-C 22 fatty acids, both saturated and unsaturated.
  • soap is the sole anionic surfactant it may be present in an amount up to about 65% by weight of the finished composition, down to about 0.2% by weight when other anionic surfactants are present.
  • Typical soaps which can be used are those formed from coconut oil, tallow, hydrogenated tallow, hydrogenated rapeseed oil and natural oils containing high proportions of oleic acid such as sunflower oil.
  • Typical nonionic surfactants are ethoxylated primary and secondary alcohols of from 8 to 25 carbon atoms containing from 3 to 25 moles of ethylene oxide per mole of alcohol. These materials may generally be present in an amount of from 1 to 25% by weight, based on the weight of the finished composition.
  • Typical detergency builders which can be used are the water-soluble phosphates, carbonates and aluminosilicates, particularly the sodium and potassium salts of these compounds.
  • Organic builders may also be used, examples being sodium carb- oxymethyloxysuccinate, sodium citrate, sodium polyacrylates and sodium nitrilotriacetate. Any of these compounds, or any other builder compound, in any suitable mixture, may be used in amounts of from 5 to 60% by weight of the finished composition.
  • Other components which will normally be present are bleaching agents and precursors therefore, such as tetraacetylethylene diamine, corrosion inhibitors, anti-redeposition agents, fluorescers, stabilisers, enzymes and substantial proportions of water.
  • Example 1 being a comparative example.
  • Aluminium phthalocyanine sulphonate was incorporated into a crutcher slurry having the composition quoted below in the amounts shown in Table 1. The slurry was then spray-dried to a powder and the content of AIPCS was determined by visible absorption spectroscopy.
  • a carefully measured quantity of AIPCS solution having a concentration of 0.299% was sprayed onto spray-dried base powder from an Amicon (trade mark) pressure vessel fitted with a Delavan Watson (trade Mark) single fluid spray jet at an operating pressure of 4.8 bar (70 psig).
  • the base powder (20 kg) was agitated by being rotated in a 1 metre pan granulator inclined at an angle of 50-54° to the horizontal and rotating at a speed of 22 rpm.
  • the formulation of the base powder was:
  • AIPCS The content of AIPCS was determined as before and was found to be same as the theoretical value, within the experimental error.
  • An aqueous solution containing AIPCS (0.08%) and sodium dihydrogen phosphate (25%) was sprayed from an Amicon (trade mark) pressure vessel onto a falling curtain of a spray-dried base powder having the composition shown in Example 2.
  • the rate of flow of the powder was 25.1 kg/min and the AICPS solution was sprayed at a rate of 1.6 kg/min.
  • the AICPS content was determined as before and was found to be the same as the theoretical value, within the experimental error, that is to say, there was no measurable loss of AICPS during the processing.
  • Examples 2 and 3 demonstrate the advantage to be gained as regards reduced loss of AIPCS during processing by operating the process of the invention, in comparison with the process defined in Example 1.
  • the detergent powders produced by the processes described in Examples 1, 2 and 3 were assessed for storage stability. They were sealed in non-laminated packs and stored at 30°C and 80°C relative himidity for 18 weeks. Initially and at 6 week intervalls the content of AIPCS was analysed spectro-photometrically. The results are shown in Table II. It can be seen that the percentage loss of AIPCS is significantly lower when AIPCS is added to the powder by spraying, as in Examples 2 and 3 rather than by incorporating it in the crutcher slurry as in Ex- . ample 1.

Claims (6)

1. Procédé de fabrication d'un produit détergent particulaire de lavage de textiles, qui consiste à former une poudre de base séchée par pulvérisation ou granulée et la combiner avec un composé de photoblanchiment, caractérisé en ce qu'on effectue la combinaison en pulvérisant une solution ou suspension de l'agent de photoblanchiment sur une poudre comprenant la poudre de base.
2. Procédé selon la revendication 1, dans lequel on pulvérise la solution ou la suspension sur la poudre en lit fluidisé.
3. Procédé selon la revendication 1 ou 2, dans lequel l'agent de photoblanchiment est un phtalo- cyanine-sulfonate de zinc ou d'aluminium.
4. Procédé selon l'une quelconque des revendications précédentes, dans lequel la concentration de l'agent de photoblanchiment dans la solution ou la suspension est de 0,001 à 0,2% en poids.
5. Procédé selon l'une quelconque des revendications précédentes, dans lequel la solution ou la suspension contient également un sel minéral.
6. Procédé selon la revendication 5, dans lequel le sel minéral comprend le dihydrogénophosphate de sodium, le bicarbonate de sodium ou le bisulfate de sodium.
EP84301006A 1983-02-18 1984-02-16 Procédé pour la manufacture de poudre détergente Expired EP0119746B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84301006T ATE20536T1 (de) 1983-02-18 1984-02-16 Verfahren zur herstellung von detergenspulver.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB838304631A GB8304631D0 (en) 1983-02-18 1983-02-18 Detergent powder
GB8304631 1983-02-18

Publications (2)

Publication Number Publication Date
EP0119746A1 EP0119746A1 (fr) 1984-09-26
EP0119746B1 true EP0119746B1 (fr) 1986-06-25

Family

ID=10538258

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84301006A Expired EP0119746B1 (fr) 1983-02-18 1984-02-16 Procédé pour la manufacture de poudre détergente

Country Status (9)

Country Link
EP (1) EP0119746B1 (fr)
JP (1) JPS59157197A (fr)
AT (1) ATE20536T1 (fr)
AU (1) AU550558B2 (fr)
BR (1) BR8400687A (fr)
DE (1) DE3460251D1 (fr)
ES (1) ES529852A0 (fr)
GB (1) GB8304631D0 (fr)
ZA (1) ZA841146B (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3504628A1 (de) * 1985-02-11 1986-08-14 Henkel KGaA, 4000 Düsseldorf Verfahren zur herstellung eines rieselfaehigen granulats
US4762636A (en) * 1986-02-28 1988-08-09 Ciba-Geigy Corporation Process for the preparation of granules containing an active substance and to the use thereof as speckles for treating substrates
DK306289D0 (da) * 1989-06-21 1989-06-21 Novo Nordisk As Detergentadditiv i granulatform
AT402173B (de) * 1994-09-13 1997-02-25 Walch Herbert Verfahren zur herstellung von verpackungen für speichermedien, insbesondere optische speicherplatten oder disketten
EP0778879B1 (fr) * 1994-08-30 2000-03-01 The Procter & Gamble Company Agent de photoblanchiment ameliore par l'adjonction d'un chelatant
GB9526097D0 (en) * 1995-12-20 1996-02-21 Unilever Plc Process
DE60209804T2 (de) * 2001-08-20 2006-08-17 Unilever N.V. Photobleichsprenkel und sie enthaltende waschmittel
GB0120160D0 (en) 2001-08-20 2001-10-10 Unilever Plc Photobleach speckle and laundry detergent compositions containing it
KR100554479B1 (ko) * 2002-09-11 2006-03-03 씨제이라이온 주식회사 염착 얼룩 방지 세탁용 착염

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1064797A (fr) * 1975-04-03 1979-10-23 Brandon H. Wiers Produit de blanchissage photoactive et procede de fabrication
US4417994A (en) * 1981-01-24 1983-11-29 The Procter & Gamble Company Particulate detergent additive compositions

Also Published As

Publication number Publication date
ATE20536T1 (de) 1986-07-15
ES8507602A1 (es) 1985-09-01
AU550558B2 (en) 1986-03-27
EP0119746A1 (fr) 1984-09-26
AU2464584A (en) 1984-08-23
BR8400687A (pt) 1984-09-25
GB8304631D0 (en) 1983-03-23
ES529852A0 (es) 1985-09-01
JPS59157197A (ja) 1984-09-06
JPH0354158B2 (fr) 1991-08-19
ZA841146B (en) 1985-10-30
DE3460251D1 (en) 1986-07-31

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