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
  • C11D3/50—Perfumes
  • C11D3/502—Protected perfumes
  • C11D3/505—Protected perfumes encapsulated or adsorbed on a carrier, e.g. zeolite or clay
• • 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
  • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
  • C11D1/66—Non-ionic compounds
  • C11D1/72—Ethers of polyoxyalkylene glycols
• • 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
  • C11D11/0082—Special methods for preparing compositions containing mixtures of detergents ; Methods for using cleaning compositions one or more of the detergent ingredients being in a liquefied state, e.g. slurry, paste or melt, and the process resulting in solid detergent particles such as granules, powders or beads
  • C11D11/0088—Special methods for preparing compositions containing mixtures of detergents ; Methods for using cleaning compositions one or more of the detergent ingredients being in a liquefied state, e.g. slurry, paste or melt, and the process resulting in solid detergent particles such as granules, powders or beads the liquefied ingredients being sprayed or adsorbed onto solid particles
• • 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
  • C11D17/0034—Fixed on a solid conventional detergent ingredient
• • 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
  • C11D17/06—Powder; Flakes; Free-flowing mixtures; Sheets

Definitions

• the present invention is directed to methods of making granular detergent compositions containing perfume.
• Granular laundry detergent compositions are well known.
• Granular laundry detergent compositions comprise one or more surfactants which can provide a good fabric-cleaning performance.
• Genearlly, granular laundry detergent compositions can be prepared by using different processes including spray-drying and agglomerate.
• Spray-drying is the standard method for manufacturing laundry detergent base powder.
• detergent ingredients are mixed together to form an aqueous detergent slurry in a mixer, such as a crutcher mixer. This slurry is then transferred along a pipe through a first low pressure pump and then through a second high pressure pump to a spray nozzle, and the slurry is sprayed into a spray-drying tower, and spray-dried to form a spray-dried powder.
• a suitable agglomeration process comprises the step of contacting a detersive ingredient, such as a detersive surfactant, e.g. linear alkyl benzene sulphonate (LAS) and/or alkyl alkoxylated sulphate, with an inorganic material, such as sodium carbonate and/or silica, in a mixer.
• a detersive ingredient such as a detersive surfactant, e.g. linear alkyl benzene sulphonate (LAS) and/or alkyl alkoxylated sulphate
• LAS linear alkyl benzene sulphonate
• an inorganic material such as sodium carbonate and/or silica
• perfume is often added in laundry detergents to delight consumers.
• perfume is generally added by spraying onto base detergent particles, such as spray-dried base detergent particles and/or agglomerated base detergent particles.
• base detergent particles such as spray-dried base detergent particles and/or agglomerated base detergent particles.
• this spray-on step is carried out in a tumbling drum mixer.
• the inventors of the present invention notice that the spray-on perfume is not sufficiently stable due to various causes, e.g. evaporation and/or degradation during the making and storage.
• one of the solutions is to increase perfume level so as to secure superiority of the final products to consumers, which apparently results in a higher cost.
• the inventors of the present invention have surprisingly found that if perfume is pre-mixed with a liquid protective agent before spraying onto the detergent particles, the stability is significantly improved. As such, the total amount of perfume needed for the making of granular detergent products can be reduced, resulting in cost saving.
• the present invention addresses the aforementioned needs by providing the following method of making a granular detergent composition.
• the present invention relates to a process of making a granular detergent composition
• a process of making a granular detergent composition comprising the steps of: a) providing a plurality of detergent particles; b) forming a premix comprising a liquid protective agent and a perfume; and c) adding the premix from step b) to at least a portion of said plurality of detergent particles.
• the present invention relates to a system for making a granular detergent composition, wherein said system comprises i) a rotating drum comprising a nozzle located inside said rotating drum, ii) a static mixer which is in fluid communication with said nozzle, and iii) a first reservoir for containing a perfume and a second reservoir for containing a liquid protective agent, in which said first and second reservoirs are both in fluid communication with said static mixer.
• the liquid protective agent is selected from a non-ionic surfactant, a non-ionic polymer, ⁇ aryl esters and any combinations thereof. More preferably, the liquid protective agent is selected from alkyl alkoxylated alcohols, polyethylene glycols, benzyl benzoate, phenyl salicylate, and any combinations thereof.
• Figure 1 illustrates the step of spraying perfume onto detergent particles in the current process (Comparative Process) and the test processes (Test Process 1 and Test Process 2) .
• Figure 2 illustrates the improved stability of perfume in the test processes compared to the current process.
• the present invention is related to a process of making a granular detergent composition comprising the steps of:
• step c) adding the premix from step b) to at least a portion of said plurality of detergent particles.
• the detergent particles can be prepared by any suitable process.
• spray-drying agglomeration, extrusion and any combination thereof.
• the spray drying process includes spraying an aqueous slurry comprising detergent ingredients into a spray-drying tower through which hot air flows. As it falls through the tower, the aqueous slurry forms droplets, the hot air causes water to evaporate from the droplets, and a plurality of spray-dried granules is formed.
• the spray-drying tower is a counter-current spray-drying tower, although a co-current spray-drying tower may also be suitable.
• the resulting granules may form the finished granular detergent composition.
• the resulting granules may be further processed (such as via agglomeration) and/or further components (such as detergent adjuncts) may be added thereto.
• the spray-dried powder is subjected to cooling, for example an air lift.
• the spray-drying powder is subjected to particle size classification, for example a sieve, to obtain the desired particle size distribution.
• the spray-dried powder has a particle size distribution such that weight average particle size is in the range of from 300 micrometers to 500 micrometers, and less than 10wt%of the spray-dried particles have a particle size greater than 2360 micrometers.
• aqueous slurry mixture may be heated to elevated temperatures prior to atomization into the spray-drying tower, such as described in WO2009/158162.
• anionic surfactant such as linear alkyl benzene sulphonate
• anionic surfactant such as linear alkyl benzene sulphonate
• a gas such as air
• a gas such as air
• any inorganic ingredients such as sodium sulphate and sodium carbonate, if present in the aqueous slurry mixture, to be micronized to a small particle size such as described in WO2012/134969.
• a suitable agglomeration process comprises the step of contacting a detersive ingredient, such as a detersive surfactant, e.g. linear alkyl benzene sulphonate (LAS) and/or alkyl alkoxylated sulphate, with an inorganic material, such as sodium carbonate and/or silica, in a mixer.
• a detersive ingredient such as a detersive surfactant, e.g. linear alkyl benzene sulphonate (LAS) and/or alkyl alkoxylated sulphate
• LAS linear alkyl benzene sulphonate
• an inorganic material such as sodium carbonate and/or silica
• the agglomeration process may also be an in-situ neutralization agglomeration process wherein an acid precursor of a detersive surfactant, such as LAS, is contacted with an alkaline material, such as carbonate and/or sodium hydroxide, in a mixer, and wherein the acid precursor of a detersive surfactant is neutralized by the alkaline material to form a detersive surfactant during the agglomeration process.
• a detersive surfactant such as LAS
• Suitable detergent ingredients include polymers, chelants, bleach activators, silicones and any combination thereof.
• the agglomeration process may be a high, medium or low shear agglomeration process, wherein a high shear, medium shear or low shear mixer is used accordingly.
• the agglomeration process may be a multi-step agglomeration process wherein two or more mixers are used, such as a high shear mixer in combination with a medium or low shear mixer.
• the agglomeration process can be a continuous process or a batch process.
• the agglomerates may be subjected to a drying step, for example to a fluid bed drying step. It may also be preferred for the agglomerates to be subjected to a cooling step, for example a fluid bed cooling step.
• the agglomerates are subjected to particle size classification, for example a fluid bed elutriation and/or a sieve, to obtain the desired particle size distribution.
• particle size classification for example a fluid bed elutriation and/or a sieve
• the agglomerates have a particle size distribution such that weight average particle size is in the range of from 300 micrometers to 800 micrometers, and less than 10wt%of the agglomerates have a particle size less than 150 micrometers and less than 10wt%of the agglomerates have a particle size greater than 1200 micrometers.
• fines and over-sized agglomerates may be recycled back into the agglomeration process.
• over-sized particles are subjected to a size reduction step, such as grinding, and recycled back into an appropriate place in the agglomeration process, such as the mixer.
• fines are recycled back into an appropriate place in the agglomeration process, such as the mixer.
• ingredients such as polymer and/or non-ionic detersive surfactant and/or perfume to be sprayed onto base detergent particles, such as spray-dried base detergent particles and/or agglomerated base detergent particles.
• base detergent particles such as spray-dried base detergent particles and/or agglomerated base detergent particles.
• this spray-on step is carried out in a tumbling drum mixer.
• step c) the addition of the premix in step c) is achieved by spraying the premix on said plurality of detergent particles, preferably inside a rotating drum.
• the premix is formed by mixing the liquid protective agent and the perfume in a mixer, preferably a static mixer.
• step b) said liquid protective agent and said perfume are mixed at an average shear rate of from 10 to 10000 s -1 , preferably from 20 to 5000 s -1 , more preferably from 40 to 7000 s -1 .
• the liquid protective agent is an alkyl alkoxylated alcohol having an average degree of alkoxylation of from 1 to 50, preferably a linear or branched, substituted or unsubstituted C 8-18 alkyl ethoxylated alcohol having an average degree of ethoxylation of from 1 to 12, more preferably from 5 to 10.
• the weight ratio of the liquid protective agent to the perfume in the premix is from 0.05 to 50, preferably from 0.1 to 20, more preferably from 0.2 to 10.
• the detergent particles are spray-dried, extruded or agglomerate particles.
• the detergent particles may comprise a detersive surfactant preferably selected from the group of: alkyl benzene sulfonate; alkoxylated alkyl sulfate; alkyl sulfate; alkoxylated alcohol; and mixtures thereof.
• a detersive surfactant preferably selected from the group of: alkyl benzene sulfonate; alkoxylated alkyl sulfate; alkyl sulfate; alkoxylated alcohol; and mixtures thereof.
• the detergent particles may comprise at least one additional detergent ingredient preferably selected from the group of: polymeric carboxylate; chelant; starch; sodium sulphate; citric acid; cellulosic polymer; suds suppressor; fluorescent whitening agent; hueing agent; flocculating agent; polyester soil release agent; or a mixture thereof.
• the present invention relates to a system for making a granular detergent composition, wherein said system comprises i) a rotating drum comprising a nozzle located inside said rotating drum, ii) a static mixer which is in fluid communication with said nozzle, and iii) a first reservoir for containing a perfume and a second reservoir for containing a liquid protective agent, in which said first and second reservoirs are both in fluid communication with said static mixer.
• Any suitable detersive surfactant is of use in the granular detergent composition.
• Suitable detersive surfactants include, but are not limited to: anionic surfactants, non-ionic surfactants, cationic surfactants, zwitterionic surfactants, amphoteric surfactants and any mixtures thereof.
• Preferred surfactants include anionic surfactants, cationic surfactants, non-ionic surfactants and any mixtures thereof.
• Suitable anionic surfactants can include alkyl benzene sulphonate.
• the anionic detersive surfactant comprises at least 50 wt%, at least 55 wt%, at least 60 wt%, at least 65 wt%, at least 70 wt%, at least 75 wt%, at least 80 wt%, at least 85 wt%, at least 90 wt%, or even at least 95 wt%, by weight of the anionic detersive surfactant, of alkyl benzene sulphonate.
• the alkyl benzene sulphonate is preferably a linear or branched, substituted or unsubstituted, C 8-18 alkyl benzene sulphonate. This is the optimal level of the C 8-18 alkyl benzene sulphonate to provide a good cleaning performance.
• the C 8-18 alkyl benzene sulphonate can be a modified alkylbenzene sulphonate (MLAS) as described in more detail in WO 99/05243, WO 99/05242, WO 99/05244, WO 99/05082, WO 99/05084, WO 99/05241, WO 99/07656, WO 00/23549, and WO 00/23548.
• MLAS modified alkylbenzene sulphonate
• C 8-18 alkyl benzene sulphonates are linear C 10-13 alkylbenzene sulphonates.
• linear C 10-13 alkylbenzene sulphonates that are obtainable by sulphonating commercially available linear alkyl benzenes (LAB) ;
• suitable LAB include low 2-phenyl LAB, such as those supplied by Sasol under the trade name or those supplied by Petresa under the trade name
• suitable LAB include high 2-phenyl LAB, such as those supplied by Sasol under the trade name
• the anionic detersive surfactant may preferably comprise other anionic detersive surfactants.
• a suitable anionic detersive surfactant is a non-alkoxylated anionic detersive surfactant.
• the non-alkoxylated anionic detersive surfactant can be an alkyl sulphate, an alkyl phosphate, an alkyl phosphonate, an alkyl carboxylate or any mixture thereof.
• the non-alkoxylated anionic surfactant can be selected from the group consisting of; C 10 -C 20 primary, branched-chain, linear-chain and random-chain alkyl sulphates (AS) , typically having the following formula (I) :
• M is hydrogen or a cation which provides charge neutrality
• preferred cations are sodium and ammonium cations, wherein x is an integer of at least 7, preferably at least 9
• C 10 -C 18 secondary (2, 3) alkyl sulphates typically having the following formulae:
• M is hydrogen or a cation which provides charge neutrality
• preferred cations include sodium and ammonium cations, wherein x is an integer of at least 7, preferably at least 9, y is an integer of at least 8, preferably at least 9; C 10 -C 18 alkyl carboxylates; mid-chain branched alkyl sulphates as described in more detail in US 6,020,303 and US 6,060,443; methyl ester sulphonate (MES) ; alpha-olefin sulphonate (AOS) ; and mixtures thereof.
• MES methyl ester sulphonate
• AOS alpha-olefin sulphonate
• anionic detersive surfactant is an alkoxylated anionic detersive surfactant.
• the presence of an alkoxylated anionic detersive surfactant in the spray-dried powder provides good greasy soil cleaning performance, gives a good sudsing profile, and improves the hardness tolerance of the anionic detersive surfactant system.
• the alkoxylated anionic detersive surfactant is a linear or branched, substituted or unsubstituted C 12-18 alkyl alkoxylated sulphate having an average degree of alkoxylation of from 0.5 to 30, preferably from 0.5 to 10, more preferably from 0.5 to 3.
• the alkoxylated anionic detersive surfactant is a linear or branched, substituted or unsubstituted C 12-18 alkyl ethoxylated sulphate having an average degree of ethoxylation of from 0.5 to 10, more preferably from 0.5 to 3.
• the alkoxylated anionic detersive surfactant is a linear unsubstituted C 12-18 alkyl ethoxylated sulphate having an average degree of ethoxylation of from 0.5 to 7, more preferably from 0.5 to 3.
• the alkoxylated anionic detersive surfactant when present with an alkyl benzene sulphonate may also increase the activity of the alkyl benzene sulphonate by making the alkyl benzene sulphonate less likely to precipitate out of solution in the presence of free calcium cations.
• the weight ratio of the alkyl benzene sulphonate to the alkoxylated anionic detersive surfactant is in the range of from 1: 1 to less than 5: 1, or to less than 3: 1, or to less than 1.7: 1, or even less than 1.5: 1. This ratio gives optimal whiteness maintenance performance combined with a good hardness tolerance profile and a good sudsing profile.
• the weight ratio of the alkyl benzene sulphonate to the alkoxylated anionic detersive surfactant is greater than 5: 1, or greater than 6: 1, or greater than 7: 1, or even greater than 10: 1. This ratio gives optimal greasy soil cleaning performance combined with a good hardness tolerance profile, and a good sudsing profile.
• the additional detergent ingredient may include a builder.
• Any suitable builder may be of use in the granular detergent composition.
• Suitable builders include, but are not limited to those selected from the group of: zeolite builder; phosphate builder; and mixtures thereof.
• Non-limiting examples of useful zeolite builders include: zeolite A; zeolite X; zeolite P; zeolite MAP; and combinations thereof.
• Sodium tripolyphosphate is a non-limiting example of a useful phosphate builder.
• the zeolite builder (s) may be present at from about 1 to about 20 %by weight of the detergent composition. It may also be especially preferred for the granular detergent composition to comprise low levels, or even be essentially free, of builder.
• the granular detergent composition is essentially free of zeolite, preferably has no zeolite.
• the granular detergent composition is essentially free of phosphate, preferably has no phosphate.
• the additional detergent ingredient may include a polymer.
• Any suitable polymer may be of use in the granular detergent composition. Suitable polymers include, but are not limited to: polymeric carboxylate; polyester soil release agent; cellulosic polymer; and mixtures thereof.
• One preferred polymeric material is a polymeric carboxylate, such as a co-polymer of maleic acid and acrylic acid.
• other polymers may also be suitable, such as polyamines (including the ethoxylated variants thereof) , polyethylene glycol and polyesters.
• Polymeric soil suspending aids and polymeric soil release agents are also particularly suitable.
• cellulosic polymer such as cellulosic polymer selected from the group of: alkyl alkoxy cellulose, preferably methyl hydroxyethyl cellulose (MHEC) ; alkyl cellulose, preferably methyl cellulose (MC) ; carboxy alkyl cellulose, preferably carboxymethylcellulose (CMC) ; and mixtures thereof.
• MHEC methyl hydroxyethyl cellulose
• MC methyl cellulose
• CMC carboxymethylcellulose
• Polymers may be present at from about 0.5 to about 20%or from about 1 to about 10%by weight of the detergent composition.
• Suitable detergent ingredients may be selected from the group of: chelants such as ethylene diamine disuccinic acid (EDDS) ; hydroxyethylene diphosphonic acid (HEDP) ; starch; sodium sulphate; carboxylic acids such as citric acid or salts thereof such as citrate; suds suppressor; fluorescent whitening agent; hueing agent; flocculating agent such as polyethylene oxide; and mixtures thereof.
• chelants such as ethylene diamine disuccinic acid (EDDS) ; hydroxyethylene diphosphonic acid (HEDP) ; starch; sodium sulphate; carboxylic acids such as citric acid or salts thereof such as citrate; suds suppressor; fluorescent whitening agent; hueing agent; flocculating agent such as polyethylene oxide; and mixtures thereof.
• EDDS ethylene diamine disuccinic acid
• HEDP hydroxyethylene diphosphonic acid
• starch sodium sulphate
• carboxylic acids such as citric acid or salts thereof such as citrate
• suds suppressor
• the inventors of the present invention found that it can significantly improve the stability of perfume to premix the perfume with a liquid protective agent before spraying onto the detergent particles.
• the non-ionic surfanct may play a protective role for perfume to prevent evaporation during the making (i.e. inside the rotating drum) and/or the storage.
• the liquid protective agent is selected from a non-ionic surfactant, a non-ionic polymer, ⁇ aryl esters and any combinations thereof. More preferably, the liquid protective agent is selected from alkyl alkoxylated alcohols, polyethylene glycols, benzyl benzoate, phenyl salicylate, and any combinations thereof.
• the non-ionic surfactant for use in the premix could be an alkyl polyglucoside and/or an alkyl alkoxylated alcohol.
• the non-ionic surfactant is a linear or branched, substituted or unsubstituted C 8-18 alkyl ethoxylated alcohol having an average degree of ethoxylation of from 1 to 10.
• Suitable non-ionic surfactants include alkyl polyglucoside and/or an alkyl alkoxylated alcohol.
• Preferred non-ionic alkyl alkoxylated alcohols include C 8-18 alkyl alkoxylated alcohol, preferably a C 8-18 alkyl ethoxylated alcohol, preferably the alkyl alkoxylated alcohol has an average degree of alkoxylation of from 1 to 50, preferably from 1 to 30, or from 1 to 20, or from 1 to 10, preferably the alkyl alkoxylated alcohol is a C 8-18 alkyl ethoxylated alcohol having an average degree of ethoxylation of from 1 to 20, preferably from 5 to 10.
• the alkyl alkoxylated alcohol can be linear or branched, and substituted or un-substituted.
• Suitable non-ionic surfactants can be selected from the group consisting of: C 8 -C 18 alkyl ethoxylates, such as, non-ionic surfactants from Shell; C 6 -C 12 alkyl phenol alkoxylates wherein preferably the alkoxylate units are ethyleneoxy units, propyleneoxy units or a mixture thereof; C 12 -C 18 alcohol and C 6 -C 12 alkyl phenol condensates with ethylene oxide/propylene oxide block polymers such as from BASF; C 14 -C 22 mid-chain branched alcohols; C 14 -C 22 mid-chain branched alkyl alkoxylates, preferably having an average degree of alkoxylation of from 1 to 30; alkylpolysaccharides, preferably alkylpolyglycosides; polyhydroxy fatty acid amides; ether capped poly
• Suitable non-ionic polymers for use in the premix can be selected from the group consisting of polyethylene glycols, polypropylene glycols, and other polymers.
• Suitable ⁇ aryl esters for use in the premix can be selected from the group consisting of benzoates, salicylates, and any combinations thereof, for example benzyl benzoate, phenyl salicylate.
• the granular detergent composition is suitable for any laundry detergent application, for example: laundry, including automatic washing machine laundering and hand laundering, and even bleach and laundry additives.
• the granular detergent composition can be a fully formulated detergent product, such as a fully formulated laundry detergent product, or it can be combined with other particles to form a fully formulated detergent product, such as a fully formulated laundry detergent product.
• the granular detergent composition may be combined with other particles such as: enzyme particles; perfume particles including agglomerates or extrudates of perfume microcapsules, and perfume encapsulates such as starch encapsulated perfume accord particles; surfactant particles, such as non-ionic detersive surfactant particles including agglomerates or extrudates, anionic detersive surfactant particles including agglomerates and extrudates, and cationic detersive surfactant particles including agglomerates and extrudates; polymer particles including soil release polymer particles, cellulosic polymer particles; buffer particles including carbonate salt and/or silicate salt particles, preferably a particle comprising carbonate salt and silicate salt such as a sodium carbonate and sodium silicate co-particle, and particles and
• the granular detergent composition according to the present invention may have a bulk density of from about 250 to about 550 grams per liter, or from about 400 to about 800 grams per liter.
• the granular detergent composition may have a mean particle granule size of from about 300 to about 550 microns, or from about 350 to about 450 microns.
• Example 1 Improved stability of perfume by premixing the perfume with non-ionic surfactant compared to separately adding perfume and non-ionic surfactant
• Comparative Process and Test Proces 1 and 2 for making granular detergent products are summarized in Fig. 1 in which non-ionic surfactants (NI) and perfume were separately sprayed onto the blended particles of blown powder (BP) of detersive surfactants and other solid particles for other ingredients in Comparative Process and then final products (FP) were prepared after the perfume was added.
• NI non-ionic surfactants
• BP blown powder
• FP final products
• Test Process 1 and 2 NI and perfume were firstly mixed with an IKA mixer (type: ULTRA TURRAX T25 basic) at 6500 rpm for 20 seconds to provide a premix before spraying onto the detergent particles, the shear head was located under the interface to avoid aeration; in which the premix was sprayed onto the blended particles of BP and other solids in Test Process 1 and the premix was sprayed onto BP and then blended with other solid particles in Test Process 2.
• IKA mixer type: ULTRA TURRAX T25 basic

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• 2020
  • 2020-11-19 WO PCT/CN2020/130029 patent/WO2022104631A1/en active Application Filing
  • 2020-11-19 EP EP20961922.0A patent/EP4247930A1/de active Pending
  • 2020-11-19 CN CN202080106759.1A patent/CN116507708A/zh active Pending

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