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
  • C11D3/02—Inorganic compounds ; Elemental compounds
  • C11D3/04—Water-soluble compounds
  • C11D3/08—Silicates
• • 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
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/02—Inorganic compounds ; Elemental compounds
  • C11D3/12—Water-insoluble compounds
  • C11D3/124—Silicon containing, e.g. silica, silex, quartz or glass beads
• • 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
  • C11D3/12—Water-insoluble compounds
  • C11D3/124—Silicon containing, e.g. silica, silex, quartz or glass beads
  • C11D3/1246—Silicates, e.g. diatomaceous earth
  • C11D3/1253—Layer silicates, e.g. talcum, kaolin, clay, bentonite, smectite, montmorillonite, hectorite or attapulgite
  • C11D3/126—Layer silicates, e.g. talcum, kaolin, clay, bentonite, smectite, montmorillonite, hectorite or attapulgite in solid compositions
• • 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
  • C11D3/12—Water-insoluble compounds
  • C11D3/124—Silicon containing, e.g. silica, silex, quartz or glass beads
  • C11D3/1246—Silicates, e.g. diatomaceous earth
  • C11D3/1253—Layer silicates, e.g. talcum, kaolin, clay, bentonite, smectite, montmorillonite, hectorite or attapulgite
  • C11D3/1273—Crystalline layered silicates of type NaMeSixO2x+1YH2O
• • 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
  • C11D3/12—Water-insoluble compounds
  • C11D3/124—Silicon containing, e.g. silica, silex, quartz or glass beads
  • C11D3/1246—Silicates, e.g. diatomaceous earth
  • C11D3/128—Aluminium silicates, e.g. zeolites

Definitions

• the present invention relates to a process for the preparation of anionic surfactant compositions in powder, pearl or granule form and the application of these compositions, in particular in cleaning and / or maintenance products.
• Anionic surfactants are frequently obtained in the form of aqueous solutions whose concentration of active materials is between 25 and 70%.
• anionic surfactants in solid form, in particular in powder, in beads or in granules, having a high concentration of active materials, non-dusty and non-irritant during handling. , flowing easily, quickly soluble in water, high bulk density and moderate manufacturing cost.
• surfactants in the form of granules, using an atomization technique which has the drawback of consuming a lot of energy. It is also known to prepare surfactant granules by absorption on charges and possibly by flaking. However, these techniques are difficult to use in the case of highly hydrophilic surfactants such as alkyl sulfates or sulfonates, which, because of their high hygroscopicity tend to regain moisture very easily and to re-agglomerate. This is the case, in particular, of secondary sodium alkanesulfonates, which, thanks to their excellent solubility in water, are used essentially in liquid detergents.
• FR-A-2 265 852 proposes the atomization of alkanesulfonates, in mixture with a mineral filler and of silicic acid.
• the quantities of mineral fillers required are greater than those of the active ingredient, so that the atomized product obtained has a reduced concentration of active ingredients.
• EP-A-0 349 200 and EP-A-0 349 201 propose a technique akin to cryoscopic grinding: the concentrated, pasty anionic surfactant is cooled very strongly using carbon dioxide snow and then it is dispersed with using a propeller rotating at high speed.
• EP-A-0 345 090 describes a process for the preparation of surfactants of the sodium alkylbenzenesulfonate type (ABSNa) in the form of granules from alkylbenzenesulfonic acid neutralized in situ, and absorbed on bentonite.
• ABSNa sodium alkylbenzenesulfonate type
• the ABSNa / Bentonite ratio being between 1/3 and 1/8, the concentration of active material of the powder obtained is low.
• the known wet granulation techniques consist essentially of agglomerating powders using a liquid, serving as a binder, forming a homogeneous mixture in sufficient proportions to allow granulation.
• compositions of surfactants in particular anionic, in powder, in beads or in granules, non-dusty, with high active material, fluids, not re-agglomerating by absorption of moisture and rapidly soluble in cold water.
• the subject of the present invention is therefore a process for the preparation of surfactant compositions in powder, pearl or granule form, containing one or more surfactants, in particular anionic, and one or more absorbent fillers, characterized in that one or more surfactants are mixed in paste.
• the present method which proceeds to a coating of the filler around the surfactant particles, allows to obtain a product divided into fine particles directly at the outlet of the mixer.
• the process described above is carried out using one or more surfactants in aqueous or hydroalcoholic paste with a concentration by weight of active material greater than or equal to 60% and having a viscosity Brookfield between 100 and 10,000 Pa.s determined at 20 ° C with a Brookfield LVT viscometer at the speed of 0.6 rpm.
• the process which is the subject of the invention will be implemented using fillers C, characterized in that the particles constituting these fillers have an average diameter less than or equal to 100 ⁇ m, and in that their absorption capacity total A, expressed in grams, determined according to standard NFT 30-022, is greater than or equal to 50 g per 100 g of the charge or charges used, and preferably, greater than 100 g for 100 g of charges used.
• the fillers are preferably chosen from the group consisting of silica, silicates of alkali or alkaline earth metals, clays, aluminosilicates, silicates and aluminosilicates of alkali and / or alkaline earth metals lamellar, also designated phyllosilicates.
• anionic surfactant is meant a surfactant having one or more anionic functions of the sulfate, sulfonate, carboxylate or phosphate type such as those cited in particular in Ullman's Encyclopaedia of Industrial Chemistry, 5th edition, volume A9, page 312 et seq., VCH GmbH - Weinheim - Germany 1991.
• alkali or alkaline earth metals can denote sodium, potassium, lithium, calcium, magnesium.
• the invention more particularly relates to a process as defined above, characterized in that the surfactant (s) is or are anionic (s) and is or are chosen (s) from the group of secondary alkanesulfonates C13-C17 and C10-C18 alkylpolyglycolsulfates.
• the absorbent filler (s) is or are preferably chosen from the group consisting of silica, alkali or alkaline earth metal silicates, and silicates and aluminosilicates of lamellar alkali and / or alkaline earth metals.
• the subject of the invention is in particular a process for preparing the compositions as defined above, characterized in that x satisfies the relation 4: 60% ⁇ x ⁇ 72% and that the absorbent filler (s) is or are very particularly chosen from the group consisting of silica, magnesium silicate, lamellar sodium silicate 2 SiO2, NaO2, commercially designated SKS6®.
• the surfactant compositions in granules, powder or pearls obtained by the process according to the invention may contain water or a mixture of water and an alkanol as well as the conventional additives making it possible to improve or modify the appearance, flow properties or any other property of the product, for example: additional silicic filler, dyes, perfumes, polymers, alkali silicates, etc., and they can also be mixed with fillers or other products in powder in order to obtain products intended for various applications: washing powders, cleaning products, phytosanitary products, disinfectants, etc ...
• the anionic surfactant compositions in powder, granule or pearl form obtained by the process of the invention due to their high concentration of surfactants, exhibit very advantageous properties in the fields of detergency, hygiene, agriculture, etc ... They allow easy preparation of various formulations of powdered products such as washing powder, various maintenance products, phytosanitary products, disinfectants. They are easily dispersible or soluble in water, they give quickly flowing powders and do not give resistant lumps.
• a subject of the invention is finally the surfactant compositions in granules, powder or pearls obtained by a above process, as well as their use in the preparation of washing powders, cleaning products, disinfectants or phytosanitary products.
• absorbent fillers are introduced successively as well as optionally the additives such as urea, anhydrous sodium carbonate, sodium sulfate and then the anionic surfactant (s) chosen in branch or in the form of aqueous pastes of weight concentration greater than or equal to 60% in the weight proportions (expressed in grams) given in table II.
• additives such as urea, anhydrous sodium carbonate, sodium sulfate and then the anionic surfactant (s) chosen in branch or in the form of aqueous pastes of weight concentration greater than or equal to 60% in the weight proportions (expressed in grams) given in table II.
• the total absorption capacity A of the charges introduced is also determined. For this, the values measured according to the method described above and given in table I are used.
• the ratio R1 between the quantity of commercial anionic surfactants actually introduced, expressed in grams and the value A indicates, if it is greater than 1, an excess of surfactant relative to the maximum quantity capable of being absorbed by the charges.
• Tables II and III clearly show that it is possible to obtain in a simple manner granular, powder or pearl compositions, having a high content of anionic active substances, easy to dry and flowing and dissolving or easily dispersing (note 2).
• the components are kneaded so as to obtain a homogeneous paste, the consistency of which is analyzed using a STEVENS-LFRA TEXTURE ANALYZER device equipped with the TA9 mobile.
• the dough brought to room temperature is extruded in a die with a diameter of 5 mm (the hot dough that is too sticky cannot be extruded) the ribbon obtained is chopped so as to obtain dumplings of approximately 5 mm of diameter.
• pellets obtained are too sticky and cannot be ground directly; nor can they be dried in a fluidized bed. They are therefore spread on a ceramic plate and dried in an oven at 105 ° C for 4 hours.
• the well-granulated and moist product is collected, the device is in no way clogged.
• the product obtained was stored for one year in a closed plastic bag, at room temperature, without any degradation of its properties being noted.
• the product was dried at the outlet of the mixer on a fluidized bed for 30 minutes at 80 ° C.
• the solubility is measured at 20 ° C for 5 g of anionic active materials per liter of distilled water.
• Table III shows the considerable improvement in dissolution rate obtained with the compositions according to the invention compared with the usual commercial qualities.

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• 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)
• Inorganic Chemistry (AREA)
• Crystallography & Structural Chemistry (AREA)
• Detergent Compositions (AREA)
• Agricultural Chemicals And Associated Chemicals (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=9464511

Family Applications (1)

Country Status (3)

Cited By (8)

Citations (6)

• 1994
  • 1994-06-22 FR FR9407652A patent/FR2721616A1/fr active Pending
• 1995
  • 1995-06-16 EP EP95401425A patent/EP0688861A1/fr not_active Withdrawn
  • 1995-06-22 JP JP7156057A patent/JPH083598A/ja active Pending

Patent Citations (6)

Non-Patent Citations (1)

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