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
  • C11D3/16—Organic compounds
  • C11D3/37—Polymers
  • C11D3/3746—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
  • C11D3/3757—(Co)polymerised carboxylic acids, -anhydrides, -esters in solid and liquid compositions
  • C11D3/3761—(Co)polymerised carboxylic acids, -anhydrides, -esters in solid and liquid compositions 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
• • 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
  • C11D17/065—High-density particulate detergent 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
  • C11D3/128—Aluminium silicates, e.g. zeolites

Definitions

• the present invention relates to a new production process for zeolite-containing granules with a pronounced adsorption capacity for liquid to waxy active substances.
• the granules are characterized by a high density, i. H. a bulk density of between 750 and 1,000 g / l (grams per liter) and are suitable for use in detergents and cleaning agents.
• DE-A-33 16 513 discloses granules containing fine powdered zeolites and salts of (co) polymeric carboxylic acids which are produced by spray drying aqueous slurries. They have a bulk density of only 560 - 610 g / l. A teaching of the content that such granules can be used as carrier material for liquid to waxy detergent components is not to be found in this document.
• DE-A-34 44 960 describes granules which contain zeolites, salts of (co) polymeric carboxylic acids and additionally small amounts of alkali metal silicates and serve as carrier material for liquid detergent components, in particular nonionics.
• the bulk density of these granules produced by spray drying is a maximum of 700 g / l and is preferably between 500 and 650 g / l.
• Document EP-A-149 264 teaches that commercially available spray-dried zeolites or their mixtures with inorganic salts, such as sodium sulfate, can be used for the same purpose.
• the bulk density of this spray pro products is in the range of 400 - 600 g / l. From EP-A-21 267 agglomerates containing zeolites and alkali silicates are known which have a bulk density of 300-700 g / l.
• a dry premix of zeolite and alkali metal silicate (mixing ratio 1: 1 to 1: 8) is sprayed with water in a granulator and agglomerated, whereupon the excess water is removed to a residual proportion of less than 5% by weight by drying .
• the granules are also suitable for adsorbing liquid detergent components, in particular from Nonionics.
• the main disadvantage is their high content of strongly alkaline-reacting alkali silicates, which severely limits their use in neutral to weakly alkaline-reacting detergents suitable for sensitive textiles and also reduce the proportion of zeolite which is capable of ion exchange.
• bulk densities of over 700 g / l cannot be achieved.
• the invention relates to a process for the production of granules containing fine crystalline zeolite, sodium or potassium salts of polymeric or copolymeric carboxylic acids and water, characterized in that (a) in a first mixing stage a homogeneous, powdery mixture of zeolite and the Salt of the (co) polymeric carboxylic acid is produced, this mixture (b) is agglomerated in a second mixing and granulation stage and (c) the agglomerate obtained until a free-flowing mixture is obtained Granules with a bulk density of 750 - 1,000 g / l dry.
• the granules which are produced by the process according to the invention generally contain (based on anhydrous substance) 60-80% by weight of zeolite, 2-15% by weight of a sodium salt of (co) polymeric carboxylic acids and 15-25% by weight.
• % Water including water bound to the zeolite.
• an anhydrous zeolite is understood to mean a sodium zeolite dewatered at the annealing temperature.
• Granules with a content of 62-75% by weight, in particular 65-70% by weight of zeolite (calculated as anhydrous) and 4-12% by weight, in particular 5-10% by weight of Na salt (co- ) polymeric carboxylic acids (water content: difference up to 100% by weight) are preferred.
• the granules For the production of the granules, it is expedient to start from spray-dried, finely powdered zeolite, which generally has a water content of 17-25% by weight, preferably 19-22% by weight.
• This water includes constitutional water and adhering moisture.
• 70-95 parts by weight, preferably 75-93 parts by weight and in particular 80-90 parts by weight of this water-containing zeolite are mixed with 2-12 parts by weight, preferably 4-10 parts by weight and in particular 5-8 parts by weight of the sodium salt of the polymeric or copolymeric carboxylic acid combined to form a homogeneous powder mixture.
• 15-25 parts by weight, preferably 18-23 parts by weight of water are mixed in with constant further mixing.
• the water is preferably sprayed onto the powder mixture kept in motion by means of nozzles and mechanically processed further until granular agglomerates are formed.
• the still moist but already free-flowing agglomerate is then dried, for example with hot flowing air or with hot combustion gases, the drying being carried out until the water added in the granulation stage to a proportion of less than 5 parts by weight, preferably less than 3 parts by weight is removed.
• further water components that were originally introduced with the zeolite or a (co) polymeric salt which is not used anhydrous can be removed during drying.
• Such "over-dried" granules can have application advantages, for example when added to detergents that contain moisture-sensitive active ingredients.
• the dewatering of the zeolite should preferably not be driven below a water content of 18% by weight in order to avoid a reduction in activity.
• the water content of the granules is expediently in a range in which the water-binding capacity of the zeolite is largely saturated, i.e. H. in which the zeolite has a total water content of 19-22% by weight (including constitutional water).
• Suitable zeolites are those of the zeolite A type. Mixtures of zeolite NaA and NaX can also be used, the proportion of the zeolite NaX in such mixtures advantageously being less than 30%, in particular less than 20%. Suitable zeolites have no particles larger than 30 ⁇ m and consist of at least 80% particles smaller than 10 ⁇ m. Their average particle size (volume distribution, measurement method: Coulter Counter) is 1 to 10 ⁇ m. Their calcium binding capacity, which is determined according to the information in DE 24 12 837 and is based on anhydrous substance, is in the range from 100 to 200 mg CaO / g.
• Examples of the homopolymeric and / or copolymeric carboxylic acids contained in the granules, in the present case as water-soluble salts, of which the sodium salts are preferred, are also polyacrylic acid, polymethacrylic acid and polymaleic acid, copolymers of acrylic acid with methacrylic acid or maleic acid with vinyl ethers, such as vinyl methyl ether or vinyl ethyl ether with vinyl esters, such as vinyl acetate or vinyl propionate, acrylamide, methacrylamide and with ethylene, propylene or styrene.
• copolymeric acids in which one of the components has no acid function the proportion thereof in the interest of sufficient water solubility is not more than 50 mol percent, preferably less than 30 mol percent.
• Copolymers of acrylic acid or methacrylic acid with maleic acid as described in more detail in EP 25 551 B1, have proven to be particularly suitable. These are copolymers which contain 50 to 90% by weight of acrylic acid or methacrylic acid and 50 to 10% by weight of maleic acid. Copolymers in which 45 to 85% by weight of acrylic acid and 55 to 15% by weight of maleic acid are present are particularly preferred.
• the molecular weight of the homo- or copolymeric polycarboxylates is generally 2,000 to 150,000, preferably 5,000 to 100,000.
• salts of (co) polymeric carboxylic acids in powder form often contain 5 to 15% by weight of moisture. This proportion of water is included in the calculation of the water balance, or the amount of water introduced into the pelletizing stage can be reduced by this proportion.
• the proportion of salts in the preparation of the compositions or in the composition of the finished granules is based on anhydrous salt.
• the granulation can be carried out batchwise or continuously in conventional mixing and granulating devices.
• B. pelletizers which consist of a horizontally arranged or inclined to the horizontal, cylindrical containers, in the longitudinal axis of which a shaft equipped with mixing tools and conveyor blades rotates.
• the water can be supplied by spray nozzles mounted in the wall or on the hollow shaft. If work is carried out continuously, two consecutive mixers can be used, the dry premix being produced in the first mixer and the pelletizing being carried out with the addition of water in the second mixer. Continuous operation is also possible in a mixer, the powder streams being combined and homogenized in a first mixing section and the mixture being treated with water and agglomerating in a subsequent mixing section in a subsequent mixing section.
• the drying can be carried out by introducing hot gases in a third mixing section z. B. a fluidized bed, or after discharging the granules from the mixer, for example in a vibrating section, a free-fall dryer or in a thin layer on a conveyor belt. Finally, coarse and fine particles are sieved off. The coarse fractions are ground and mixed into the product, fine fractions or dust are returned to the granulation.
• the granules have a bulk density of 750-1000 g / l, usually that of 800-950 g / l. Due to their tight packing and their small pore volume, their absorption capacity for liquid or pasty detergent components, especially nonionics, is somewhat reduced compared to specifically lighter carrier grains, but is still 15 to a maximum of 20% by weight without any appreciable impairment of the free-flowing properties. This In view of the high packing density, the surprisingly high adsorption capacity is completely sufficient for the usual fields of application, in particular for use as a mixture component in detergents and cleaning agents.
• the granules can be impregnated with any liquid or paste-like or fat-like detergent constituents which cannot be incorporated into conventional powdery or granular detergents or cleaning agents in other ways or only with a loss of activity.
• foam inhibitors in particular paraffin hydrocarbons, silicones, silicone resins and bis-acylalkylenediamines derived from long-chain fatty acids, and mixtures thereof.
• Other adsorbable active ingredients are fatty acid alkylolamides and cationic plasticizers, such as long-chain fatty residues containing quaternary ammonium salts, and also fat-dissolving solvents, such as terpenes.
• the granules are preferably used as carrier grains for nonionic surfactants. This is another aspect of the invention.
• Suitable nonionic surfactants are alkoxylation products with 10 to 20 carbon atoms in the hydrophobic radical and 3 to 20 glycol ether groups. These include ethoxylation products of alcohols, vicinal diols, amines, thio alcohols, fatty acid amides and fatty acids. Alkylphenol polyglycol ethers with 5 to 12 carbon atoms in the alkyl radical and 3 to 10 ethylene glycol ether groups can also be used. Block polymers of ethylene oxide and propylene oxide, which are commercially available under the name Pluronics, are also suitable. Alkyl glycosides or alkyl polyglycosides and mixtures thereof with the ethoxylation products mentioned can also be used.
• Preferred nonionics which can be adsorbed on the granules and together with them as a free-flowing mixture, are derived from alcohols with 12 to 18 carbon atoms which are saturated or olefinically unsaturated, linear or methyl-branched in the 2-position (oxo radical) could be.
• Their reaction products with ethylene oxide (EO) or propylene oxide (PO) are water-soluble or water-dispersible mixtures of compounds with different degrees of alkoxylation, the number of EO or PO groups given below corresponding to a statistical mean.
• Examples of preferred ethoxylated fatty alcohols are C12 ⁇ 18 coconut alcohols with 3 to 12 EO, C16 ⁇ 18 tallow alcohol with 4 to 16 EO, oleyl alcohol with 4 to 12 EO and ethoxylation products of corresponding chain and EO distribution available from other native fatty alcohol mixtures. From the series of ethoxylated oxo alcohols, for example, those of the composition C12 ⁇ 15 + 5 to 10 EO and C14 ⁇ 15 + 6 to 12 EO are suitable.
• Mixtures of low and highly ethoxylated alcohols are distinguished by increased detergency against both greasy and mineral stains, for example those made from tallow alcohol + 3 to 6 EO and tallow alcohol + 12 to 16 EO or C13 ⁇ 15 oxo alcohol + 5 EO and C12 ⁇ 14 -Oxo alcohol + 8 to 12 EO.
• ethoxylates containing EO groups and PO groups e.g. B. C12 ⁇ 18 alcohols of the formula R- (PO) a - (EO) b or R- (EO) b - (PO) c , in which a is from 1 to 3, b is from 5 to 20 and c is from 1 to 10 (b greater than c) mean.
• the liquid, optionally heated, additives, in particular nonionics, can be applied to the granules by mixing, preferably spraying, the carrier material advantageously being kept in motion by suitable mixing devices. Further treatment of the granular adsorbate is not necessary. However, it may be advisable to leave the product to rest for several hours at high contents of the applied liquid material, since its diffusion into the interior of the grain takes some time. The treatment of the granules with the liquid additives leads to a further increase in the bulk density, which can rise to values of over 1,000 g / l.
• the grains can optionally also be dusted with finely divided powders or coated on the surface.
• Suitable powdering agents have a grain size of 0.001 to at most 0.1 mm, preferably less than 0.05 mm, and can be present in proportions of 0.03 to 3, preferably 0.05 mm to 2% by weight, based on that with Additive-laden adsorbents can be used.
• finely powdered zeolites, silica airgel (Aerosil (R) ), colorless or colored pigments, such as titanium dioxide are suitable. in the in general, however, such an aftertreatment is superfluous, especially since it does not improve the solution properties.
• the detergent additives can be combined and mixed in a known manner with the granular or pulverulent detergent, for example a tower spray powder and its mixtures with other powder components, such as persalts, enzyme granules, bleach activators or defoamers.
• the mixed detergents generally contain 10 to 40% by weight of the additive according to the invention.
• the granules according to the invention have a different grain structure than those which are produced by conventional granulation processes. This can also be demonstrated by electron micrographs. If, as is customary in conventional granulation processes, the powdery zeolite is placed in the mixer and a solution of the (co) polymeric salt is sprayed on, granules are formed which do not differ externally from the products according to the invention, except that their bulk density is significantly reduced.
• the images obtained with the scanning electron microscope show sections through two different granules on a magnification scale of 1: 2 500 (Figs. 1 and 2) and 1: 5 000 (Figs. 3 and 4). Both grains have the identical qualitative and quantitative composition according to the information in Example 1.
• Figures 1 and 3 show a grain, in the production of which the spray-dried zeolite was sprayed in a mixer with a 25% strength by weight aqueous solution of the copolymeric salt, granulated and then dried.
• Figures 2 and 4 show the grain structure of the according to the information in the case spiels 1 manufactured product.
• the arrangement of the cubic zeolite particles in Figures 1 and 3 is completely random. Large pores alternate with strongly bonded, irregularly structured aggregates.
• the zeolite cubes are packed much denser and more uniformly. Individual parts are pronounced of a structure comparable to a pavement or a brickwork. The pore size is also significantly reduced.
• the granulation was carried out in a mixing granulator, consisting of a horizontally arranged cylindrical mixer with a rotating shaft (Lödige type) rotating in the central axis, equipped with mixing elements, with a capacity of 130 liters and a knife mill connected to it, operated at a speed of 1200 to 1500 rpm .
• 69.5 parts by weight of a synthetic, finely crystalline, spray-dried zeolite of the NaA type, containing 20% by weight of bound water were mixed with 8.8 parts by weight of powdered sodium salt of an acrylic acid-maleic acid copolymer (moisture content 8 % By weight) to a homogeneous powder mixture.
• the copolymer (Sokalan (R) CP5 from BASF, Ludwigshafen) had a molecular weight of approximately 70,000. After the mixing, which took about 20 seconds, 21.7 parts by weight of water were sprayed in over 90 seconds by means of nozzles and the mixture was granulated for a further 3 minutes with constant mixing. The granules leaving the mixer were dried in a fluidized bed with hot, flowing dry gases. The final product had the following composition: 72.9% by weight of zeolite (calculated as anhydrous) 9.3% by weight polymer salt (calculated anhydrous) 17.8 wt% water
• the bulk density of the granules was 900 g / l.
• the granules were sprayed in a spray mixer with a liquid, nonionic surfactant heated to 40 ° C., consisting of a mixture of coconut and tallow alcohol reacted with 5 mol EO in a ratio of 1: 4. After standing for 1 hour, the adsorbates showed the following bulk weights: example % By weight nonionic g / l bulk density 1a 2nd 960 1b 6.5 995 1c 12.3 1,060
• the granules treated with the nonionic surfactant were free-flowing and had a perfect wash-in capacity, both as unblended powder and mixed with a powdery household detergent in a ratio of 1: 4.

Landscapes

• 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)
• Detergent Compositions (AREA)
• Silicates, Zeolites, And Molecular Sieves (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=6366852

Family Applications (2)

Family Applications Before (1)

Country Status (9)

Cited By (11)

Families Citing this family (7)

Citations (3)

Family Cites Families (5)

• 1988
  • 1988-11-10 DE DE3838086A patent/DE3838086A1/de not_active Withdrawn
• 1989
  • 1989-11-02 ES ES89120266T patent/ES2047091T3/es not_active Expired - Lifetime
  • 1989-11-02 EP EP89912426A patent/EP0442923A1/fr active Pending
  • 1989-11-02 KR KR1019900701431A patent/KR900701992A/ko not_active Application Discontinuation
  • 1989-11-02 WO PCT/EP1989/001312 patent/WO1990005175A1/fr not_active Application Discontinuation
  • 1989-11-02 EP EP89120266A patent/EP0368137B1/fr not_active Expired - Lifetime
  • 1989-11-02 DE DE89120266T patent/DE58906639D1/de not_active Expired - Lifetime
  • 1989-11-02 JP JP1511510A patent/JPH04501730A/ja active Pending
  • 1989-11-07 PT PT92223A patent/PT92223B/pt not_active IP Right Cessation
  • 1989-11-10 TR TR89/0954A patent/TR24018A/xx unknown
• 1991
  • 1991-05-08 DK DK086891A patent/DK86891A/da unknown

Patent Citations (3)

Also Published As

Similar Documents

Legal Events