JPH045080B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for producing a powder detergent having high density and excellent fluidity. [Prior art and problems] Detergents used in households have been required to have good productivity, be easy to handle, and have good solubility when used by consumers. Most of the detergents were powdered detergents manufactured by Here, ease of handling refers to the fact that the powder has high free-flowing properties and is difficult to solidify, and that no dust is generated. However, in recent years, rationality from a resource saving perspective,
Demand for high-density powder detergents is increasing due to consumer convenience and portability. High density means that the apparent specific gravity of the powder is 0.5 g/cm ³
Refers to the above. It is extremely difficult to obtain powder detergents with such high density by conventional spray drying methods. Generally, the apparent specific gravity of spray-dried detergent particles is
It is difficult to directly obtain high-density detergent particles with a particle size of 0.4 g/cm ³ or less and an average particle diameter of about 200 to 1000 μm. On the other hand, the spray drying method has the advantage that any composition containing various raw materials including an anionic surfactant containing a large amount of water can be easily dried, except for thermally unstable components. Therefore, it has been desired to establish a manufacturing method for processing spray-dried detergent particles to obtain particles with high density and excellent fluidity. Attempts to obtain high-density powder detergent by processing spray-dried detergent particles have been made, for example, in JP-A-51-67302.
There is. In Japanese Patent Application Laid-open No. 51-67302, atomization is carried out using a granulation device called Marmerizer, which includes a substantially horizontal, rotatable, rough-surfaced table located inside and at the bottom of a substantially vertical, smooth-walled surface. Although a manufacturing method for densifying dry powder detergent has been disclosed, and is a pioneering technology of the present invention, no consideration is given to the fluidity of the powder, and as a result, the fluidity of the product is powder detergent, and the convenience for consumers is insufficient. [Means for Solving the Problems] Based on the above technical background, research was conducted to produce a high-density powder detergent that exhibits good fluidity, and as a result, the present invention described below was completed. The present invention relates to a mixer or a tank thereof having a vertical stirring shaft inside a solid mixing tank, for example, a stirring shaft protruding from the bottom, and stirring blades attached to the shaft to mix and roll powder. After stirring and grinding the spray-dried product of the detergent containing at least one surfactant and at least one builder by means of a mixer having a grinding or rolling chopper in the presence of surface modifiers and binders. It is characterized by producing a powdered detergent with high density and excellent fluidity by performing stirring granulation treatment under the above conditions. Aluminosilicates are preferred as surface modifiers because they act as calcium ion scavengers during washing. In particular, an aluminosilicate having an average primary particle diameter of 10 μm or less is desirable. As a surface modifier,
In addition to aluminosilicates, inorganic fine powders such as silicon dioxide, bentonite, talc, and clay with an average particle size of 10 μm or less can be used. Furthermore, metal soaps having an average particle size of 10 μm or less can be used in the same manner. The purpose of the surface modifier is achieved by using 0.5 to 35 parts by weight per 100 parts by weight of spray-dried detergent particles. If the surface modifier is less than 0.5 parts by weight,
It is difficult to obtain a powder that exhibits good fluidity;
Moreover, if it exceeds 35 parts by weight, the fluidity will decrease, and unless the amount of binder is increased unnecessarily, dust may be generated and the usability of the consumer may be impaired. Furthermore, the apparent specific gravity of the high-density detergent particles is 0.5~
It is 1.2g/ ^cm3 . This is because if the apparent specific gravity is larger than this, it tends to have an adverse effect on the solubility of the powder. Moreover, the average particle size starts from 200
Preferably it is 800 μm. This is because dust is generated when the average particle size is less than 200μm, and
This is because when the diameter exceeds 800 μm, solubility tends to deteriorate. Surfactants that can be used in the present invention include the following. 1 A straight-chain or branched alkylbenzene sulfonate having an alkyl group with an average of 10 to 16 carbon atoms 2 A straight-chain or branched alkyl benzene sulfonate having an average of 10 to 20 carbon atoms average
0.5 to 8 moles of ethylene oxide or propylene oxide or butylene oxide or ethylene oxide/propylene oxide = 0.1/9.9 to 9.9/0.1 ratio or ethylene oxide/butylene oxide =
Alkyl or alkenyl ether sulfate added in a ratio of 0.1/9.9 to 9.9/0.1 3 Alkyl or alkenyl sulfate having an alkyl or alkenyl group having an average of 10 to 20 carbon atoms 4 An average of 10 to 20 carbon atoms per molecule Holefin sulfonate 5 having an average of 10 to 20 carbon atoms per molecule 6 Saturated or unsaturated fatty acid salt having an average of 10 to 24 carbon atoms per molecule 7 Average carbon number 10 It has ~20 alkyl or alkenyl groups, and an average of 0.5 to 8 moles of ethylene oxide, propylene oxide, or butylene oxide in one molecule, or ethylene oxide/propylene oxide = 0.1/
At a ratio of 9.9 to 9.9/0.1 or ethylene oxide/butylene oxide = 0.1/9.9 to 9.9/0.1
Alkyl or alkenyl ether carboxylic acid salt added in a ratio of 8 α-sulfo fatty acid salt or ester represented by the following formula (In the formula, Y is an alkyl group having 1 to 3 carbon atoms or a counter ion, Z is a counter ion, and R is an alkyl group having 1 to 3 carbon atoms.
20 alkyl or alkenyl groups. ) 9 Amino acid type surfactant represented by the following general formula (Here, R ₁ ' is an alkyl group or alkenyl group having 8 to 24 carbon atoms, and R ₂ ' is hydrogen or an alkyl group having 1 to 24 carbon atoms.
2 alkyl group, R ₃ ' is an amino acid residue,
represents an alkali metal or alkaline earth metal ion. ) (R ₁ ′, R ₂ ′ and X are as described above. n is 1 to 5
Indicates an integer. ) (R ₁ ' is as described above. m represents an integer from 1 to 8.) (R ₁ ', R ₃ ' and X are as described above. R ₄ represents hydrogen or an alkyl or hydroxyalkyl group having 1 to 2 carbon atoms.) (R ₁ ′, R ₃ ′ and X are as described above. R ₅ represents a β-hydroxyalkyl or β-hydroxyalkenyl group having 6 to 28 carbon atoms.) (R ₃ ′, R ₅ and It has an alkyl group with an average carbon number of 6 to 12, and 1 to
Polyoxyethylene alkyl phenyl ether 12 with 20 moles of ethylene oxide added Polyoxypropylene alkyl or alkenyl ether 13 with an alkyl or alkenyl group having an average carbon number of 10 to 20 and with 1 to 20 moles of propylene oxide added Polyoxybutylene alkyl or alkenyl ether 14 having an alkyl group or alkenyl group with an average carbon number of 10 to 20 and to which 1 to 20 moles of butylene oxide has been added, A nonionic surfactant with a total of 1 to 30 moles of ethylene oxide and propylene oxide or ethylene oxide and butylene oxide added (ratio of ethylene oxide and propylene oxide or butylene oxide is 0.1/9.9 to 9.9/0.1) 15 The following: Higher fatty acid alkanolamide or its alkylene oxide adduct represented by the general formula (In the formula, _R11 ' is an alkyl group or alkenyl group having 10 to 20 carbon atoms, _R12 ' is H or _CH3 , _n3 is an integer of 1 to 3, and _m3 is an integer of 0 to 3. ) 16 Sucrose fatty acid ester consisting of a fatty acid with an average carbon number of 10 to 20 and sucrose17 Fatty acid glycerin monoester consisting of a fatty acid with an average carbon number of 10 to 20 and glycerin18 Alkylamine oxide represented by the general formula below (In the formula, R ₁₃ ′ is an alkyl group or alkenyl group having 10 to 20 carbon atoms, and R ₁₄ ′ and R ₁₅ ′ are groups having 1 to 20 carbon atoms.
3 is an alkyl group. ) 19 Betaine type amphoteric activator represented by the general formula below (Here, R ₂₁ is alkyl or alkenyl having 8 to 24 carbon atoms, β-hydroxyalkyl or β
-Hydroxyalkenyl group, R ₂₂ has 1 or more carbon atoms
The alkyl group of 4 and _R23 represent an alkyl or hydroxyalkyl group having 1 to 6 carbon atoms. ) (Here, R ₂₁ and R ₂₃ are as described above. n ₂ is 1 to
Indicates an integer of 20. ) (Here, R ₂₁ and R ₂₃ are as described above. R ₂₄ represents a carboxyalkyl or hydroxyalkyl group having 2 to 5 carbon atoms.) 20 Sulfonic acid type amphoteric surfactant represented by the following general formula (Here, R ₁₁ is an alkyl or alkenyl group having 3 to 24 carbon atoms, R ₁₂ is an alkyl group having 1 to 4 carbon atoms, R ₁₃ is an alkyl group having 1 to 5 carbon atoms, and R ₁₄ is an alkyl group having 1 to 4 carbon atoms. (Indicates an alkyl or hydroxyalkyl group.) (Here, R ₁₁ and R ₁₄ are as described above. _{R 15} ,
_R16 represents an alkyl or alkenyl group having 8 to 24 carbon atoms or 1 to 5 carbon atoms. ) (Here, R ₁₁ and R ₁₄ are as mentioned above, and n ₁ is 1 to
Indicates an integer of 20. ) 21 Phosphate ester activator No. 1 Alkyl (or alkenyl) acid phosphate ester (R' is an alkyl group or alkenyl group having 8 to 24 carbon atoms, n'+m'=3, n'=1 to 2) No.2 Alkyl (or alkenyl) phosphate ester (R′ is as mentioned above, n″+m″=3, n″=1~3) No.3 Alkyl (or alkenyl) phosphate ester salt (R′, n″, m″ are as mentioned above, M′ is Na, K,
Ca) 22 Cationic surfactant represented by the general formula below (Here, at least one of R ₁ ′, R ₂ ′, R ₃ ′, and R ₄ ′ represents an alkyl or alkenyl group having 8 to 24 carbon atoms, and the others represent an alkyl group having 1 to 5 carbon atoms.
X′ represents halogen. ) (Here, R ₁ ′, R ₂ ′, R ₃ ′, and X′ are as described above.) (Here, R ₁ ′, R ₂ ′, and X′ are as described above.
R ₅ ' is an alkylene group having 2 to 3 carbon atoms, and n ₄ is 1 to 3.
Indicates an integer of 20. ) The content of surfactant is 10-70% by weight, preferably 25-50% by weight. Further, inorganic builders that can be used in the present invention include the following. Alkaline salts such as soda carbonate, sodium sesquicarbonate, and sodium silicate, neutral salts such as mirabilite, phosphates such as orthophosphate, pyrophosphate, tripolyphosphate, metaphosphate, hexametaphosphate, and phytate. In addition to the following aluminosilicates may also be included. No. 1 Crystalline aluminosilicate x′ (M ₂ ′O or M″O)・Al ₂ O ₃・y′(SiO ₂ )・
w′(H ₂ O) (where M′ is an alkali metal atom, M″ is an alkaline earth metal atom exchangeable with calcium, x′,
y' and w' represent the number of moles of each component, and generally, 0.7≦x'≦1.5, 0.8≦y'≦6, and w' is any integer. ) No. 2 As the detergent builder, those represented by the following general formula are particularly preferred. Na ₂ O・Al ₂ O ₃・nSiO ₂・wH ₂ O (Here, n represents a number from 1.8 to 3.0, and w represents a number from 1 to 6.) No. Amorphous aluminosilicate x expressed by the cubic formula (M ₂ O)・Al ₂ O ₃・y(SiO ₂ )・=(H ₂ O) (In the formula, M represents a sodium and/or potassium atom, and x, y, and w are within the following marginal value range. 0.7≦x _≦ 1.2 1.6≦y≦2.8 w is any positive number including 0) No. 4 Amorphous aluminosilicate _O )・_Al2O3・Y( _SiO2 )・Z _{( P2O5} )・ω
(H ₂ O) In the formula, M represents Na or K, and X, Y, Z, and W represent the number of moles of each component within the following numerical range. 0.20≦X≦1.10 0.20≦Y≦4.00 0.001≦Z≦0.80 W: Any positive number including 0) Furthermore, the following additives can be used in the present invention. (1) Divalent metal ion scavenger 1 Ethane-1,1-diphosphonic acid, Ethane-
1,2-triphosphonic acid, ethane-1-hydroxy-1,1-diphosphonic acid and its derivatives, ethanehydroxy-1,1,2-triphosphonic acid, ethane-1,2-dicarboxy-
Phosphonates such as 1,2-diphosphonic acid and methanehydroxyphosphonic acid. 2 Phosphonocarboxylic acid salts such as 2-phosphonobutane-1,2-dicarboxylic acid, 1-phosphonobutane-2,3,4-tricarboxylic acid, and α-methylphosphonosuccinic acid. 3 Amino acid salts such as aspartic acid and glutamic acid. 4 Aminopolyacetates such as nitrilotriacetate, ethylenediaminetetraacetate, diethylenetriaminepentaacetate, etc. 5 Polyacrylic acid, polyaconitic acid, polyitaconic acid, polycitraconic acid, polyfumaric acid, polymaleic acid, polymethaconic acid, poly-α-hydroxyacrylic acid, polyvinylphosphonic acid, sulfonated polymaleic acid, maleic anhydride-diisobutylene copolymer , maleic anhydride-styrene copolymer, maleic anhydride-methyl vinyl ether copolymer, maleic anhydride-ethylene copolymer, maleic anhydride-ethylene crosslink copolymer, maleic anhydride-vinyl acetate copolymer, Maleic anhydride-acrylonitrile copolymer, maleic anhydride-acrylic ester copolymer, maleic anhydride-butadiene copolymer, maleic anhydride-isoprene copolymer, polyamide derived from maleic anhydride and carbon monoxide. −β−
Ketocarboxylic acid, itaconic acid, ethylene copolymer, itaconic acid-aconitic acid copolymer,
Itaconic acid-maleic acid copolymer, itaconic acid-acrylic acid copolymer, malonic acid-methylene acid copolymer, methaconic acid-fumaric acid copolymer, ethylene glycol-ethylene terephthalate copolymer, vinylpyrrolidone-vinyl acetate Copolymer, 1-butene-2,3,4-tricarboxylic acid. Itaconic acid-acrylic acid copolymer, polyester polyaldehyde carboxylic acid with quaternary ammonium groups, cis-isomer of epoxysuccinic acid, poly[N,N-bis(carboxymethyl)acrylamide], poly(oxycarboxylic acid) , starch succinic acid or maleic acid or terephthalic acid ester, starch phosphate ester, dicarboxy starch, dicarboxymethyl starch, carboxymethyl cellulose, succinic acid ester, etc. Polyethylene glycol, polyvinyl alcohol, polyvinyl pyrrolidone, cold water soluble urethane Non-dissociated polymers such as polyvinyl alcohol. 7 Diglycolic acid, oxydisuccinic acid, carboxymethyloxysuccinic acid, cyclopentane-1,2,3,4-tetracarboxylic acid, tetrahydrofuran-1,2,3,4-tetracarboxylic acid, tetrahydrofuran-2,2,
Carboxymethylated products of 5,5-tetracarboxylic acid, citric acid, lactic acid, tartaric acid, sucrose, lactose, raffinose, etc., carboxymethylated products of pentaerythritol, carboxymethylated products of gluconic acid, polyhydric alcohols or sugars, and maleic anhydride. Or a condensate with succinic anhydride, a condensate of oxycarboxylic acid with maleic anhydride or succinic anhydride, benzene polycarboxylic acid represented by mellitic acid, ethane-1,1,2,2-tetracarboxylic acid, Ethene-1,1,2,2-
Tetracarboxylic acid, butane-1,2,3,4
-tetracarboxylic acid, propane-1,2,3
-Tricarboxylic acid, butane-1,4-dicarboxylic acid, oxalic acid, sulfosuccinic acid, decane-1,10-dicarboxylic acid, sulfotricarbalic acid, sulfoitaconic acid, malic acid, oxydisuccinic acid, gluconic acid, CMOS, Builder M organic acid salts such as (2) Anti-restaining agent Furthermore, one or more of the following compounds can be contained in the composition in an amount of 0.1 to 5% as an anti-restaining agent. Polyethylene glycol, polyvinyl alcohol, polyvinylpyrrolidone, carboxymethyl cellulose, etc. (3) Bleach Soda percarbonate, sodium perborate, sodium sulfate hydrogen peroxide adduct, etc. (4) Enzymes (enzymes that perform their original enzymatic action during the cleaning process) Classified based on their reactivity, they include hydrolases, hydrolases, oxidoreductases, desmolases, transferases, and isomerases. However, any of them can be applied to the present invention. Particularly preferred are hydrolases, including proteases, esterases, carbohydrases and nucleases. Specific examples of proteases include pepsin, tripepsin, chymotrypsin, collagenase, keratinase, elastase, sptilisin, BPN,
papain, promeline, carboxypeptidase A and B, aminopeptidase, and aspargylopeptidase A and B. Specific examples of esterases include gastric lipase, pancreatic lipase, plant lipases, phospholipases, cholinesterases, and hostases. Carbohydrases include cellulase, maltase, satucarase, amylase, pectinase,
Includes lysozyme, α-glycosidase and β-glycosidase. (5) Blue-tinging agent Various types of blue-tinging agents can be added as necessary. For example, the following structure is recommended: (In the formula, D represents a blue to purple monoazo, disazo or anthraquinone dye residue, and
and Y is a hydroxyl group, an amino group, a hydroxyl group, a sulfonic acid group, a carboxylic acid group, an aliphatic amino group that may be substituted with an alkoxy group, a halogen atom, a hydroxyl group, a sulfonic acid group, a carboxylic acid group, a lower alkyl group, It is an aromatic amino group or a cycloaliphatic amino group which may be substituted with a lower alkoxy group. R is a hydrogen atom or a lower alkyl group. However, this excludes cases where R represents a hydrogen atom and X and Y simultaneously represent a hydroxyl group or an alkanolamino group, and cases where either one of X and Y is a hydroxyl group and the other is an alkanol-amino group. n represents an integer of 2 or more. ) (In the formula, D represents a blue to purple azo or anthraquinone dye residue, and X and Y represent the same or different alkanol amino residues or hydroxyl groups.) (6) Anti-caking agent para-toluenesulfonate, Xylene sulfonates, acetates, sulfosuccinates, talc, finely powdered silica, clays, calcium-silicates (such as Microcell from Johns Manvill), magnesium oxide, etc. (7) Antioxidant Tertiary-butylhydroxytoluene, 4,4'-butylidenebis-(6-tert-butyl-3-methylphenol), 2,2'-butylidenebis-(-tert-butyl-4-methylphenol) , monostyrenated cresol, distyrenated cresol, monostyrenated phenol, distyrenated phenol, 1,
Antioxidants such as 1'-bis-(4-hydroxyphenyl)cyclohexane. (8) Fluorescent dye 4,4'-bis-(2-sulfostyryl)-biphenyl salt, 4,4'-bis-(4-chloro-3-sulfostyryl)-biphenyl salt, 2-(styrylphenyl)naphthothiazole derivative, 4,4'-bis(triazol-2-yl)stilbene derivative,
One or more bis(triazinylamino)stilbene disulfonic acid derivatives are present in the composition.
It can be contained in an amount of up to 1% by weight. (9) Photoactivated bleaching agent The composition may contain 0 to 0.2% by weight of one or both of sulfonated aluminum phthalocyanine and sulfonated zinc phthalocyanine. (10) Fragrance Binders that can be used in the present invention include carboxycellulose, polyethylene glycol,
Water-soluble polymer solutions such as polycarboxylic acid salts such as sodium polyacrylate, nonionic substances such as polyoxyethylene alkyl ether, fatty acid monoethanolamide, fatty acid diethanolamide,
Examples include aqueous sodium silicate solution and water. In practicing the present invention, spray-dried detergent particles can be obtained as follows. That is, excluding thermally unstable raw materials such as enzymes and bleaching agents, and inorganic builders that do not require drying, such as sodium carbonate and sodium sulfate, anionic surfactant solutions and aluminosilicate slurries that require drying. , a fluorescent dye, a pigment, etc., is spray-dried.
If the spray-dried particles are highly sticky, it is optional to incorporate sodium carbonate, sodium sulfate, sodium silicate, etc. into the detergent slurry. The apparent specific gravity and particle size of spray-dried detergent particles are similar. The moisture content is preferably 12% or less. If there is more water than that, it will have a negative effect on the fluidity of the particles after granulation. Next, the granulation process in the method of the present invention will be explained. The granulation treatment method in the present invention basically consists of the following two steps. Crushing process Spray-dried detergent particles are placed in a mixer that has a vertical stirring shaft inside a solid mixing tank, such as a stirring shaft that protrudes from the bottom, and that mixes the powder by attaching stirring blades to this shaft. and grind until the apparent specific gravity becomes 0.05 to 0.3 g/cm ³ larger than the original particles. At this time, if the temperature of the powder exceeds 60 degrees Celsius, the powder will become more sticky and cause agglomeration, so to avoid this, it is effective to install a jacket around the mixer and run cold water through it. In this step, other inorganic and/or organic raw materials of the detergent other than the spray-dried product may be mixed. Stirring granulation process Following the above steps, stirring granulation is carried out while adding a surface modifier and a binder. The surface modifier and the binder may be added at the same time, one of them may be added first, or they may be added alternately. In this step, it is optional to mix other inorganic and/or organic raw materials of the detergent. As an example of the mixer used in the present invention, either a high-speed mixer (stirring rolling granulator) or a Henschel mixer (high-speed stirring granulator) can be used. The detergent particles produced by the present invention can be easily distinguished from detergent particles produced by other methods because they have the following two characteristics. One of these is that the particle surface is covered with a surface modifier, which can be easily confirmed by observation with an electron microscope. Another feature is that the detergent particles of the present invention are composed of mechanically broken, spray-dried particles. This is because when detergent particles are soaked in ethyl alcohol, the detergent particles of the present invention become a fine powder and disperse, whereas simply spray-dried laundry detergent particles do not disperse in this way. I can confirm. [Examples] Examples of the present invention are shown below, but these Examples do not limit the present invention. Example 1 A detergent having the following composition was spray-dried. Linear alkylbenzene sulfonate 35 parts by weight Alkyl sulfate ester salt 10 Sodium carbonate 21.5 Sodium silicate 7 Sodium aluminosilicate 14 Sodium sulfate 3 Nonionic surfactant 3.5 Water 6 Average of detergent particles obtained The particle size was 600 μm and the apparent specific gravity was 0.31 g/cm ³ . 100 parts by weight of the spray-dried detergent particles were placed in a high-speed mixer (manufactured by Fukae Kogyo Co., Ltd.), stirred and pulverized for 10 minutes, and the apparent specific gravity was 0.43 g/ml.
The average particle size was 130μm. Next, 2 parts by weight of water and 4 parts of aluminosilicate fine powder with an average particle size of 2.7 μm were added.
After adding part by weight and stirring to granulate, coarse particles were removed using a 16-mesh sieve. The apparent specific gravity, average particle size, and fluidity of the detergent thus obtained were measured and are shown in Table 1 along with other Examples and Comparative Examples. Here, the fluidity of the powder is determined by measuring the time required for 100ml of powder to flow out from a hopper for measuring apparent specific gravity specified in JIS K3362, and the shorter the time, the better the fluidity is determined. . Example 2 A detergent having the following composition was spray dried. Linear alkylbenzene sulfonate 35 parts by weight Alkyl sulfate ester salt 10 〃 Sodium carbonate 30 〃 Sodium silicate 7 〃 Sodium aluminosilicate 9 〃 Sodium sulfate 3 〃 Water 6 〃 The average particle size of the obtained detergent particles is 500 μm, and the apparent specific gravity is It was 0.34g/ml. 100 parts by weight of these detergent particles were placed in a high-speed mixer (manufactured by Fukae Kogyo Co., Ltd.), stirred and pulverized for 10 minutes, and the apparent specific gravity was 0.44.
g/ml, and the average particle size was 110 μm. Next, 4.6 parts by weight of a nonionic surfactant and 17 parts by weight of aluminosilicate fine powder having an average particle size of 2.7 μm were added, and granulation was performed with stirring. After removing coarse particles using a 16-mesh sieve, specific gravity, average particle size, and fluidity were measured. Example 3 Spray-dried detergent particles used in Example 1
100 parts by weight was placed in a high-speed mixer (manufactured by Fukae Kogyo Co., Ltd.) and pulverized with stirring for 10 minutes, resulting in an apparent specific gravity of 0.43 g/ml and an average particle size of 130 μm. Next, 2 parts by weight of water and 1 part by weight of silicon dioxide fine powder having a particle size of 20 mμ (0.02 μm) were added, and after granulation with stirring, coarse particles were removed using a 16-mesh sieve. Example 4 In Example 3, 2 parts by weight of the same aluminosilicate and the average particle size were used instead of the silicon dioxide fine powder.
2 parts by weight of 1.5 μm fine talc powder were used together. Comparative Example 1 In Example 1, stirring granulation was performed without adding a surface modifier. Comparative Example 2 In Example 1, 40 parts by weight of the same aluminosilicate as in Example 1 was added and granulation was performed with stirring. As is clear from the above Examples and Comparative Examples, according to the production method of the present invention, a granular detergent with high density and excellent fluidity can be obtained. 【table】

Claims (1)

[Claims] 1. A vertical stirring shaft is provided inside a rigid mixing tank,
After stirring and pulverizing the spray-dried detergent product containing at least one type of surfactant and at least one type of builder using a mixer with a stirring blade attached to the shaft for mixing powder, surface modification is performed. A method for producing a high-density granular detergent with improved fluidity, characterized in that high-density detergent particles with an apparent specific gravity of 0.5 to 1.2 g/cm ³ are obtained by performing an agitation granulation process in the presence of an agent and a binder. . 2. The manufacturing method according to claim 1, wherein the surface modifier is an aluminosilicate. 3 The average diameter of primary particles of aluminosilicate is 10 μm
The manufacturing method according to claim 2, which is as follows. 4. The manufacturing method according to claim 1, wherein the surface modifier is an inorganic fine powder such as silicon dioxide, bentonite, talc, or clay having an average diameter of 10 μm or less. 5. The manufacturing method according to claim 1, wherein the surface modifier is a metal soap with an average diameter of 10 μm or less. 6. The method according to any one of claims 1 to 5, wherein the surface modifier is used in an amount of 0.5 to 35 parts by weight per 100 parts by weight of the spray-dried product. 7. The manufacturing method according to any one of claims 1 to 6, in which a powder or granular inorganic raw material or (and) organic raw material other than the spray-dried product is added and granulation is performed at the same time.