JPH08253800A - Preparation of high-bulk-density detergent composition - Google Patents

Abstract

PURPOSE: To enable a high-bulk-density detergent compsn. having a good solubility in water and an excellent detergency to be produced with a high productivity and without any troubles (particularly with excellent crushability and granulatability) in the course of production thereof. CONSTITUTION: In a process for producing a high-bulk-density detergent compsn. by spray-drying a slurry contg. a sodium salt of α-sulfofatty ester, a salt of a linear alkylbenzenesulfonic acid and an inorg. salt, compacting and kneading the resulting spray-dried powder together with an alkali builder and a binder component with a kneader, and then crushing and graulating the resulting compacted kneaded mass; at least one of potassium carbonate and potassium bicarbonate is dispensed and added in both the slurry preparation step and the kneading step at a slurry preparation step/kneading step dispensing ratio of 1/0.4 to 1/0.01.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a high bulk density detergent composition which has excellent productivity and can be mass-produced.

[0002]

2. Description of the Related Art In recent years, laundry detergents have been shifted to the use of high bulk density detergent compositions which can be washed with a small amount of detergent and which are excellent in transportability, storability and displayability. There is. Further, among the surfactants, α-sulfofatty acid ester salt is derived from natural raw materials and is known as a surfactant excellent in cleaning ability, particularly hard water resistance, and a high bulk density detergent composition containing the same. The object is JP-A-62-199695.
JP-A-64-60695, JP-A-64-
No. 60696, JP-A-3-35098, JP-A-6-6097, and the like.

A high bulk density detergent composition is produced by compacting and kneading a detergent raw material, crushing, granulating or stirring granulating,
As the manufacturing method, for example, JP-A-61-69897, JP-A-61-69898, and JP-A-61-69.
899, JP-A 1-318097, JP-A-2-14297, JP-A-2-29500,
JP-A-2-86700, JP-A-2-173099
Japanese Patent Application Laid-Open No. 2-245100, Japanese Patent Application Laid-Open No. 2-2200
86799, JP2-38497A, JP2-145699A, JP2-169696A, JP2-232299A, JP2-2323A.
Various methods have been proposed in Japanese Patent No. 2300, Japanese Unexamined Patent Publication No. 3-33199, and the like.

Among these methods, after spray kneading a spray-dried composition of detergent containing a surfactant and a builder,
In the method of granulating with a crushing granulator that crushes by impact and shearing force with a knife cutter that rotates at high speed, the hardness of the kneaded product greatly contributes to the suitability for crushing, and the hardness of the kneaded product is low. However, problems such as adhesion to the crusher and poor fluidity of the crushed product occur. For this reason, conventionally, in order to increase the hardness of the kneaded product, an alkali builder or a binder has been added. For example, as described in JP-A-6-166897, a method of blending potassium carbonate and potassium bicarbonate during kneading, or potassium carbonate during kneading with a slurry as described in JP-A-6-166896. ,
A method of incorporating potassium bicarbonate has been proposed. However, in a system containing a sodium salt of α-sulfo fatty acid ester and a linear alkylbenzene sulfonate, the blending of potassium carbonate and potassium bicarbonate significantly adversely affects the quality of the detergent, and especially when kneading, a large amount of these is added. When compounded, the detergent particles become difficult to dissolve in water, and there is a problem that the detergent power of the detergent decreases.

[0005]

DISCLOSURE OF THE INVENTION According to the present invention, a slurry containing a sodium salt of α-sulfo fatty acid ester and a linear alkylbenzene sulfonate is spray-dried, and the obtained detergent composition is kneaded and ground to obtain a high bulk density. In the process of producing a detergent composition, it is an object of the present invention to produce a detergent composition having good solubility in water and excellent detergency with high productivity without trouble during production.

[0006]

Means for Solving the Problems The present inventors have spray-dried a slurry containing a sodium salt of α-sulfo fatty acid ester and a linear alkylbenzene sulfonate and an inorganic salt, and then obtained a spray-dried powder with an alkali builder. And a binder component and kneading with a kneader, and then crushing and granulating the obtained kneaded product to produce a high-bulk density detergent composition. Or a part of sodium salt of α-sulfo fatty acid ester is changed to potassium salt by potassium salt of bicarbonate, and it is precipitated as crystals in the washing liquid, and it is found that this is the cause of deterioration of solubility of the detergent. Surprisingly, the addition of potassium salt to both the slurry and the kneading in a specific split ratio improves the water solubility of the detergent,
As a result, they have found that the detergency is improved.

Further, the present inventors have set the ratio of potassium salt / sodium salt of linear alkylbenzene sulfonic acid to 1/0.
It was also found that by adjusting the amount to ˜1 / 10, the suitability for crushing and granulation, which is the cause of the decrease in the solubility of the detergent, and the effect of preventing the precipitation of the potassium salt of α-sulfofatty acid ester, can be further dramatically improved. It was the invention.

That is, the method for producing a high-bulk density detergent composition of the present invention comprises spray drying a slurry containing a sodium salt of α-sulfo fatty acid ester, a linear alkylbenzene sulfonate and an inorganic salt, and then spray drying the resulting slurry. The powder is kneaded and compacted with an alkali builder and a binder component with a kneader,
Next, in the method for producing a high bulk density detergent composition by crushing and granulating the obtained kneaded kneaded product, at least one kind of potassium salt of carbonic acid or bicarbonate is added both during slurry preparation and during kneading. At the time of slurry preparation / kneading = 1/0.
It is characterized in that it is dividedly added at a division ratio of 4 to 1 / 0.01.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, the sodium salt of α-sulfo fatty acid ester is typically represented by the following chemical formula 1.

[0010]

Embedded image (R ¹ : alkyl group or alkenyl group R ² : lower alkyl group)

The sodium salt of α-sulfofatty acid ester is prepared by sulfonation of α-sulfofatty acid ester by the method described in, for example, JP-A-4-359098, and after aging and bleaching as necessary, Obtained by harmonizing. The fatty acid residue (R ¹ CHCOO) of the sodium salt of α-sulfo fatty acid ester has 8 to 2 carbon atoms.
2 is suitable, and preferably 12-18. The lower alkyl group (R ² ) preferably has 1 to 6 carbon atoms, and preferably 1 to 3 carbon atoms. Further, as the sodium salt of α-sulfo fatty acid ester, those having a specific carbon number such as (a) and (b) below are (a) / (b) = 1/9 to 6/4,
In particular, it is preferable to use it in combination in a weight ratio of 2/8 to 5/5 from the viewpoint of solubility of the detergent composition. (A) Fatty acid residues having 12 to 14 carbon atoms (b) Fatty acid residues having 16 to 18 carbon atoms

The sodium salt of α-sulfofatty acid ester is generally a subordinate amount of α-sulfofatty acid di-salt (where R ² is an alkali metal in the above chemical formula 1), lower alkyl fatty acid salt or ester, higher alkyl fatty acid. It includes salts or esters, mirabilite, various ethers, which can be produced by industrial post-treatments such as bleaching with hydrogen peroxide or hydrolysis of the ester bonds during neutralization. In the case of industrial products, this di-salt is usually contained in an amount of 1 to 10% by weight, but this does not impair the working effect of the product. The sodium salt of the α-sulfo fatty acid ester is 4 to 35% by weight, preferably 5 to 3% by weight in the final detergent composition.
0% by weight is compounded.

The linear alkylbenzene sulfonate is industrially generally provided as an aqueous slurry, or is mixed by a method of neutralizing the linear alkylbenzene sulfonic acid with potassium hydroxide, sodium, potassium carbonate, sodium or the like. It has an alkyl group having an average carbon number of 8 to 16 and is incorporated in the final composition in an amount of 1 to 30% by weight, preferably 3 to 20% by weight. Further, by adjusting the weight ratio of the potassium salt / sodium salt of the linear alkylbenzene sulfonate to the range of 1/0 to 1/10, preferably 1/0 to 1/8, α can be obtained without impairing the productivity. -The counterion exchange suppressing effect from sodium salt to potassium salt of sulfo fatty acid ester is improved. Here, if the sodium salt ratio is out of the above range, although the exchange of the α-sulfo fatty acid ester with the potassium salt is less likely to occur, the hardness of the kneaded product becomes softer in terms of production, and the pulverizer is crushed. It also causes troubles in manufacturing and makes industrially stable manufacturing difficult.

In the present invention, other surfactants may be added to the slurry, for example, the following non-soap anionic surfactants and soaps can be exemplified. 1) an α-olefin sulfonate having an average carbon number of 10 to 20; 2) an alkyl sulfate having an average carbon number of 10 to 20; and 3) a linear or branched alkyl group or alkenyl group having an average carbon number of 10 to 20. Alkyl ether sulphate or alkenyl ether sulphate having an average of 0.5 to 8 mol of ethylene oxide, 4) Saturated or unsaturated fatty acid salt having an average of 10 to 22 carbon atoms. Alkali metal salts such as sodium and potassium are usually suitable as counterions in these anionic surfactants.

Next, as the inorganic salt, alkali builder, zeolite, etc. can be used, and as the zeolite, for example, those commercially available as A-type, X-type or amorphous synthetic zeolite can be used.
Its content is 5 to 35% by weight, preferably 10 to 30% by weight in the final detergent composition. In addition, as the alkali builder, known ones other than potassium carbonate and potassium bicarbonate, such as sodium silicate, sodium carbonate, sodium hydrogen carbonate, sodium sulfate, sodium sesquicarbonate, powdered sodium silicate, and the like can be used, and carbonic acid is particularly preferable. Salt is preferably used. Its content is 5 to 60% by weight in the final composition, preferably 8 to 5%.
0% by weight.

In the production method of the present invention, at least one kind of potassium salt of carbonic acid or bicarbonate is dividedly added at the time of preparing the slurry and at the time of kneading, and the addition amount is 4 to 20% by weight, preferably in the detergent composition. Is blended in an amount of 5 to 18% by weight, and the split blending ratio (weight ratio) at the time of slurry preparation / kneading is 1 / 0.4 to 1 / 0.01, preferably 1 / 0.35
It is mixed in the range of 1 / 0.03.

Here, if the amount of the α-sulfo fatty acid ester is changed from the sodium salt to the potassium salt when the compounding amount is out of the above range and the kneading amount is large, the product quality is improved, especially during pickling and washing. There is a problem that the detergency is lowered. On the other hand, if the blending amount at the time of preparing the slurry is increased, the problem of deterioration of detergency due to exchange of sodium salt of α-sulfofatty acid ester with potassium salt does not occur, and the slurry viscosity can be decreased, The hardness of the kneaded material at that time is remarkably reduced, and as a result, troubles such as adhesion to a crusher occur and stable production becomes difficult. Therefore, when the divided compounding ratio at the time of preparing the slurry / at the time of kneading is within the above range, it becomes possible to satisfy both product quality and manufacturing suitability.

The aqueous slurry can be prepared by a usual method and can be spray-dried by a general method. For example, using a counter-current type spray drying tower, a hot air temperature of 20
It can be performed under the condition of 0 to 300 ° C. Next, in the production method of the present invention, the dry powder thus obtained is kneaded with an alkali builder and a binder component by a kneader, and then the kneaded product is crushed (crushed) and granulated.

As the detergent component other than the dry powder at the time of granulation, an alkali builder, a zeolite or a binder component can be used, and the amount of the dry powder used is 50 to 90% of the whole detergent composition, particularly It is preferably 55 to 85%. As the alkali builder and zeolite other than potassium carbonate and potassium bicarbonate to be added at the time of granulation, those of the above types can be used. Further, as the binder component, a high-concentration aqueous solution of an anionic surfactant, a nonionic surfactant or an aqueous solution thereof, polyethylene glycol, polyacrylic acid, polyacrylic acid salt,
A polymer aqueous solution such as polyvinyl alcohol, water or the like can be used.

Further, examples of the above-mentioned anionic surfactant include the following. 1) an α-olefin sulfonate having an average carbon number of 10 to 20; 2) an alkyl sulfate having an average carbon number of 10 to 20; and 3) a linear or branched alkyl group or alkenyl group having an average carbon number of 10 to 20. Alkyl ether sulphate or alkenyl ether sulphate having an average of 0.5 to 8 mol of ethylene oxide, 4) fatty acid lower alkyl having an average carbon number of 8 to 22 (C ₁ to
C ₃ ) ester sulfonates, 5) saturated or unsaturated fatty acid salts having an average carbon number of 10 to 22. Alkali metal salts such as sodium and potassium are usually suitable as counterions in these anionic surfactants.

The following nonionic surfactants are suitable. 1) an EO addition type nonionic surfactant obtained by adding ethylene oxide (EO) to an average of 4 to 50 moles of a primary or secondary alcohol having 8 to 18 carbon atoms, and 2) a primary or secondary alcohol having 8 to 18 carbon atoms. To EO
Is an average of 4 to 25 mol, and propylene oxide (PO) is an average of 3 to 15 mol. EO-PO-added nonionic surfactant, 3) Lower alkyl (C ₁ to C 6 -C 20) fatty acid.
C ₃ ) Ester type nonionic surfactant obtained by adding 4 to 25 mol of EO on average to the ester.

The final detergent composition can be obtained by powder blending the detergent particles obtained by granulation with an enzyme, a softening agent, a bleaching agent or the like, or by spraying a perfume, if necessary. In the detergent composition of the present invention, in addition to the above-mentioned components, a surfactant, zeolite, an inorganic builder such as sodium tripolyphosphate and sodium pyrophosphate, sodium citrate, sodium ethylenediaminetetraacetate,
Nitrilotriacetate, sodium polyacrylate, sodium acrylate-sodium maleate anhydride copolymer,
Calcium capture builder such as polyacetal carboxylate, alkali builder such as carbonate and silicate, anti-redeposition agent such as carboxymethyl cellulose and polyethylene glycol, paratoluene sulfonate, toluene sulfonate, xylene sulfonate, urea, etc. Viscosity modifiers, enzymes such as protease, lipase, cellulase and amylase, quaternary ammonium salts, softening agents such as bentonite, bleaching agents, fluorescent agents, fragrances and dyes can be used. These compounds can be compounded by any method depending on their properties.

[0023]

According to the present invention, the slurry containing the sodium salt of α-sulfofatty acid ester, the linear alkylbenzene sulfonate and the inorganic salt is spray-dried, and the resulting spray-dried powder is treated with an alkali builder and a binder component. And kneading with a kneader, and then crushing and granulating the obtained kneaded product to produce a high-bulk density detergent composition. An excellent high-bulk density detergent composition can be produced with high productivity without any troubles during production (particularly excellent in crushing and granulation).

[0024]

【Example】

Examples 1 to 10 According to the dry product composition of Table 2 below, the slurry water content was adjusted to be 50%, and spray drying was performed at a hot air temperature of 230 ° C. using a countercurrent spray dryer to obtain the dry product water content. Dry to 5%. Then, each component shown in the kneaded composition of Table 2 was added to this spray-dried product, and the mixture was kneaded by a KRC kneader (Kurimoto Iron Works Co., Ltd.) and then extruded by a machine (manufactured by Fuji Paudal Co., Ltd.). A pellet of about 10 mmφ × 20 mm was prepared. This pellet product was crushed and granulated by a speed mill (manufactured by Okada Seiko Co., Ltd.) equipped with a screen having an opening of 2 mm, and the presence or absence of adhesion to the crusher was observed. Also,
The cleaning performance was performed using the test described below. The results of these tests are shown in Table 3.

<< Evaluation Criteria for Adhesion to Crusher >> ○: No adhesion △: Adhesion to 10% or less of screen area ×: Adhesion to 30% or more of screen area

<< Evaluation Method of Detergency >> (1) Preparation of Artificial Soil Clay containing crystalline minerals such as kaolinite and vermiculite dried at 200 ° C. for 30 hours was used as inorganic soil. . After dissolving 3.5 g of gelatin in 950 cc of water at about 40 ° C., 0.25 g of carbon black was dispersed in water with a powerful emulsifying and dispersing machine, Polytron (manufactured by KINEMATICA, Switzerland). Next, 14.9 g of inorganic dirt and 31.4 g of an oily dirt component having the composition shown in Table 1 were added and emulsified and dispersed with Polytron to prepare a stable dirt bath. A 10 cm × 20 cm predetermined clean cloth (cotton cloth No. 60 designated by Japan Oil Chemistry Association) was immersed in this dirt bath, and water was squeezed with two rubber rolls to make the amount of dirt adhered uniform. After drying this dirty cloth for 30 minutes at 105 ° C., both sides of the dirty cloth were rubbed 25 times on each side. This was cut into 5 cm × 5 cm, and the one having a reflectance within the range of 42 ± 2% was used as a soiled cloth. The soil composition of the artificial soil cloth thus obtained is shown in Table 1.

[0027]

[Table 1] Table 1: Soil composition Soil component wt% Organic stain Oleic acid 28.3 Triolein 15.6 Cholesterol oleate 12.2 Liquid paraffin 2.5 Squalene 2.5 Cholesterol 1.6 Oily soil Total 62.7 Gelatin 7.0 Inorganic dirt 29.8 Carbon black (specified by Japan Oil Chemistry Association) 0.5

(2) Cleaning Method A commercially available two-tub type washing machine was used as the cleaning device. As for the items to be washed, 10 pieces of the artificial soil cloth are sewn onto the worn shirt and the total is 1
Kg. Put 30L of tap water at 25 ℃ into the washing machine,
A predetermined amount of the detergent composition and the article to be washed are added so that the detergent concentration becomes 0.0833%, and the article is washed for 10 minutes. After washing, it is dehydrated for 1 minute, then rinsed for 3 minutes, further dehydrated for 1 minute, rinsed for 3 minutes, the reflectance of the soiled cloth is measured, and the cleaning power is calculated by the following formula (1).

[0029]

[Equation 1] Detergency = (K / S of dirty cloth-K / S of cleaning cloth) / (K / S of dirty cloth-K / S of unclean cloth) × 100 K / S = (1 -R / 100) ² / (2R / 100) ... [Kubelka Munk's equation] R is the reflectance (%) measured by an ELREPHO reflectometer manufactured by Cari Zeiss. The detergency was evaluated by an average value of 10 pieces of artificial dirt cloths tested.

<< Measurement of Precipitated Amount of Potassium Salt of .alpha.-Sulfo Fatty Acid Ester >> 0.4 g of the detergent composition was added to 100 ml of water at 25.degree. C., shaken for 1 hour, filtered through a millipore of 0.45 .mu.m, and then obtained. The obtained filtrate is put in a 500 ml measuring flask and diluted to the marked line. After that, 5m from this
1 ml was taken, 25 ml of methylene blue indicator and 15 ml of chloroform were added, and then 5 ml of 4 mM benzethonium chloride aqueous solution was added, followed by titration with a 2 mM LAS-Na standard solution, and both layers separated into two layers had the same color tone. The amount of anionic surfactant was determined with the point as the end point. A blank test was also conducted at the same time. Further, a sample which is not filtered is similarly titrated to obtain an initial value, and a decrease amount from this initial value is used as a potassium salt of α-sulfofatty acid ester (α-S
F-K) The amount of precipitation was calculated from the following formula of Equation 2.

[0031]

[Equation 2] Here, B: amount of LAS-Na standard solution required for titration of blank test (ml) A: amount of LAS-Na standard solution required for titration of sample solution (ml) f: titer of LAS-Na standard solution M: average molecular weight of anionic surfactant X ₀ : Anionic surfactant content in sample before filtration (%) X ₁ : Anionic surfactant content in sample after filtration (%)

Comparative Examples 1 to 7 Comparative Examples 1 to 7 according to the compositions shown in Table 4 as in Examples 1 to 8.
Was carried out and the results are shown in Table 5.

From Tables 2 to 5, in Examples, the kneaded product was less attached to the grinder, and the amount of the potassium salt of α-sulfofatty acid ester deposited was also low, that is, the solubility of the detergent was good. Moreover, it can be seen that the cleaning power is also excellent.

[0034]

[Table 2]Table 2: Examples 1 to 10 (part 1) [detergent composition] Example 1 2 3 4 5 6 7 8 9 10 Dry product composition (%) α-SF-Na *¹5 10 10 15 20 15 15 15 20 10 LAS-K *²20 10 10 3 10 10 15 5 0 1 LAS-Na *³0 2 2 10 0 2 0 5 10 15 AOS-K *^Four3 5 5 3 0 3 3 3 0 3 Soap 4 3 3 3 4 4 4 4 4 4 Potassium carbonate 6 0 10 5 8 10 0 4 8 5 Potassium bicarbonate 0 10 5 5 0 0 7 4 0 5 Sodium carbonate 9.8 10.8 10.8 7.8 9.8 7.8 7.8 10.8 9.8 8.8 Sodium sulfite 2 2 2 2 2 2 2 2 2 2 Sodium silicate 2 2 2 2 2 2 2 2 2 2 Zeolite 18 15 10 14 14 14 14 15 14 14 Fluorescent agent 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 Water 5 5 5 5 5 5 5 5 5 5 Kneaded composition (%) Dry product 75 75 75 75 75 75 75 75 75 75 Nonionic surfactant *^Five3 3 3 3 3 3 3 3 3 3 Potassium carbonate 2 0 1 3 1 0 1.5 0.5 1 2 Potassium bicarbonate 0 2 0 0 1 1.5 0 0.5 1 0 Sodium carbonate 12 12 11 11 12 10.5 10.5 11 12 12 Zeolite 6 6 8 6 6 8 8 8 6 6 Added water 2 2 2 2 2 2 2 2 2 2 * 1) Sodium salt of α-sulfofatty acid methyl ester (mixture of fatty acid residues having 12 to 14 carbon atoms / 16 to 18 carbon atoms = 3/7 (weight ratio)) * 2) C₁₄~ C₁₈Α-olefin sulfone fatty acid potassium * 3) linear alkyl (C_Ten~ C₁₄) Potassium benzenesulfonate * 4) Linear alkyl (C_Ten~ C₁₄) Sodium benzene sulfonate * 5) Addition product of primary alcohol having 12 to 13 carbon atoms with 25 mol of ethylene oxide

[0035]

[Table 3]Table 3: Examples 1 to 10 (part 2) [Evaluation results] Example 1 2 3 4 5 6 7 8 9 10 Evaluation result Adhesion to crusher ○ ○ ○ ○ ○ ○ ○ ○ △ ～ ○ △ ～ ○ Detergency (%) 82 82 82 84 83 84 82 82 84 83 α-SF-K precipitation (%) * ⁶ 2 2 1 2 2 2 2 1 4 4 * 6) Amount of potassium salt of α-sulfo fatty acid fatty acid salt (%)

[0036]

[Table 4] Table 4: Comparative Examples 1 to 8 (Part 1) [Detergent Composition] Comparative Example 1 2 3 4 5 6 7 8 Dry product composition (%) α-SF-Na * ¹ 5 10 5 15 10 15 15 15 LAS-K * ² 20 15 20 5 10 5 15 0 LAS-Na * ³ 0 0 0 5 0 5 2 15 AOS-K * ⁴ 3 3 3 3 5 3 3 3 Soap 4 4 4 4 4 4 4 4 4 Potassium carbonate 5 0 0 0 10 0 2 2 Potassium bicarbonate 0 10 0 0 0 8 2 2 Sodium carbonate 10.8 9.8 13.8 13.8 11.8 10.8 8.8 10.8 Sodium sulfite 2 2 2 2 2 2 2 2 2 Sodium silicate 2 2 2 2 2 2 2 2 2 Zeolite 18 14 20 20 15 15 14 14 Fluorescent agent 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 Water 5 5 5 5 5 5 5 5 Kneaded composition (%) Dry product 75 75 75 75 75 75 75 75 Nonionic interface Activator * ⁵ 3 3 3 3 3 3 3 3 3 Potassium carbonate 0 0 10 5 5 8 5 5 Potassium bicarbonate 0 0 0 5 0 0 0 0 Sodium carbonate 14 14 6 6 11 6 9 9 Zeolite 6 6 4 4 4 6 6 6 added water 2 2 2 2 2 2 2 2 * 1) α- sulfo carbon atoms of the sodium salt (fatty acid residues of fatty acid methyl ester 12 to 14 / to 16 carbon atoms 18 = 3/7 (weight ratio) mixture) * 2) C ₁₄ -C ₁₈ of α- olefin sulfonate fatty acid potassium * 3) linear alkyl (C ₁₀ -C ₁₄₎ potassium benzenesulfonate * 4) straight-chain alkyl ( C _{10 to} C ₁₄ ) Sodium benzene sulfonate * 5) 25 mol of ethylene oxide adduct of primary alcohol having 12 to 13 carbon atoms

[0037]

[Table 5] Table 5: Comparative examples 1 to 8 (part 2) [Evaluation result] Comparative example 1 2 3 4 5 6 7 8 8 Evaluation result Adhesion to crusher × × ○ ○ ○ ○ ○ ○ ○ Detergency (% ) 82 82 70 66 70 66 68 69 Precipitation of α-SF-K (%) * ⁶ 1 2 18 25 15 28 20 15 * 6) Precipitation amount of potassium salt of α-sulfo fatty acid fatty acid salt (%)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Seiji Abe 1-3-7 Honjo, Sumida-ku, Tokyo Lion Corporation

Claims (3)

[Claims] 1. A spray-dried slurry containing a sodium salt of an α-sulfo fatty acid ester, a linear alkylbenzene sulfonate, and an inorganic salt, and the obtained spray-dried powder is kneaded with an alkali builder and a binder component by a kneader. In the method for producing a high bulk density detergent composition by crushing and granulating the resulting kneaded mixture, at least one kind of potassium salt of carbonic acid or bicarbonate is kneaded at the time of slurry preparation. Slurry preparation / kneading = 1 at both times
A method for producing a high-bulk density detergent composition, characterized in that it is dividedly added at a division ratio of /0.4 to 1 / 0.01. 2. The high bulk density detergent composition according to claim 1, wherein the detergent composition contains a sodium salt of α-sulfofatty acid ester in an amount of 4 to 35% by weight and a linear alkylbenzene sulfonate in an amount of 1 to 30% by weight. Method of manufacturing things. 3. The method for producing a high bulk density detergent composition according to claim 1, wherein the weight ratio of potassium salt / sodium salt of linear alkylbenzene sulfonate is in the range of 1/0 to 1/10.