JPH07179898A - Preparation of high bulk density granular detergent composition - Google Patents

Abstract

PURPOSE:To produce safely a detergent composition containing a high concentration of an anionic surfactant by means of a stirring or a mixing granulation method, the composition being reduced in adhesion to the granulator. CONSTITUTION:This detergent composition is prepared by granulating 10-70wt.% surfactant paste containing one or more anionic surfactants, 0.5-40wt.% potassium salt of carbonic or hydrogencarbonic acid, 3-50wt.% crystalline aluminosilicate and 0.5-10wt.% fine particles comprising a silica powder or/and a clay powder by means of a stirring or a mixing granulator.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a method for producing a high bulk density granular detergent composition containing a surfactant in a high concentration.

[0002]

2. Description of the Related Art As an example of producing a high bulk density detergent using agitation granulation, there is disclosed in JP-A-61-69897 and JP-A-61-69900 after pulverizing spray-dried particles of detergent. , A method of performing agitation granulation in the presence of a surface modifier in vertical and horizontal mixers. However, this method requires a large amount of energy because a spray dryer is used for producing the granulation raw material, which is not preferable in terms of energy saving. As an example of producing a detergent without a spray-drying step, an aqueous activator paste and a dry-cleaning builder are mixed in JP-A-2-86700 to form a dough, which is then produced at a temperature of -25 to 20 ° C. A method of doing the grain is shown. However, in this method, it is difficult to granulate at a high temperature because adhesion to the granulator is a concern, and an extra step of cooling to a predetermined temperature is required. Examples of containing a porous oil-absorbing carrier in a detergent composition are disclosed in JP-A-4-339898 and JP-A-5-125400, but these contain a nonionic surfactant as a main base as a composition. The manufacturing method is limited, and its applicability to a composition containing a general anionic surfactant is not shown. Moreover, when a relatively large amount of oil absorbing carrier is used, there is a concern that fine powder in the granulated product may increase.

[0003]

DISCLOSURE OF THE INVENTION The present invention is a detergent particle containing an anionic surfactant as a main active ingredient by using a stirring or mixing granulator without a spray drying step requiring a large amount of energy. The present invention provides an efficient method for producing high bulk density detergent particles, which does not require extra steps such as cooling and aging for suppressing sticking to a granulator when granulating the.

[0004]

In the method for producing a high bulk density granular detergent of the present invention, the total amount of the granular material obtained by granulation is 10
It is characterized in that the components including the following (a) to (d) are mixed at 0% by weight and then stirred or mixed and granulated. (A) Surfactant paste containing at least one anionic surfactant: 10-70% by weight. (B) Carbonic acid or hydrogen carbonate and potassium salt: 0.5 to
40% by weight. (C) Crystalline aluminosilicate: 3 to 50% by weight. (D) Fine particles composed of silica-based powder and / or clay-based powder: 0.5 to 10% by weight.

[0005]

DETAILED DESCRIPTION OF THE INVENTION

The surfactant paste as the component (a) contains at least one anionic surfactant as a main surfactant component, and may contain a nonionic surfactant as necessary. As the anionic surfactant, for example, the following ones can be used, and sulfate ester type and sulfonate type are preferable. (1) A linear or branched alkylbenzene sulfonate having an alkyl group or an alkenyl group having an average carbon number of 10 to 18. (2) A higher alcohol sulfate ester salt having an alkyl group or an alkenyl group having an average carbon number of 10 to 18. (3) A higher alcohol ethoxylate sulfuric acid ester salt in which a saturated or unsaturated alcohol residue has an average carbon number of 10 to 18 and an average of 0.5 to 8 mol of ethylene oxide is added in one molecule. (4) An α-olefin sulfonate having an average carbon number of 10 to 18. (5) An α-sulfofatty acid alkyl ester salt in which a saturated or unsaturated fatty acid residue has an average carbon number of 10 to 18 and an alkyl group of the ester has 1 to 5 carbon atoms.

Typical salts are sodium salt and potassium salt, but other water-soluble salts can also be used.
The anionic surfactant is preferably added to the surfactant paste (a) in an amount of 10 to 80% by weight, more preferably 20 to 70% by weight. Also, considering the final high bulk density granular detergent composition as a reference, the anionic surfactant is compounded and granulated in the paste so as to be compounded in the final detergent composition in an amount of 5 to 40% by weight. It is suitable, and more preferably 25 to 40% by weight.

(A) In the surfactant paste, a nonionic surfactant can be blended, if necessary, and this reduces the viscosity of the paste and makes the paste highly concentrated and easy to handle. . Examples of the nonionic surfactant used here include the following. (1) A fatty acid polyoxyalkylene alkyl ether represented by the following general formula (I).

[0008]

[Chemical 1] (R ₁ CO: a saturated or unsaturated fatty acid residue having 6 to 20 carbon atoms, AO: an oxyalkylene group having 2 to 4 carbon atoms, and the same oxyalkylene group may be added alone. And oxyalkylene groups different from each other may be mixed and added.n: Indicates an average number of moles of alkylene oxide added to form an oxyalkylene group, and when a plurality of alkylene oxides are added, it may be random addition or block addition R ₂ : lower alkyl group having 1 to 5 carbon atoms)

(2) A polyoxyethylene alkyl ether obtained by adding 3 to 30 mol of ethylene oxide on average to a saturated or unsaturated straight or branched chain alcohol having 8 to 18 carbon atoms. (3) Saturated or unsaturated straight-chain or branched-chain carbon number 8
~ 18 alcohols with an average of 3 to 3 ethylene oxide
Polyoxyethylene polyoxypropylene alkyl ether to which 0 mol and propylene oxide are added in an average of 2 to 30 mol.

When a nonionic surfactant is added,
It is suitable to add 1% by weight or more to the (a) surfactant paste, preferably 1 to 50% by weight, more preferably 1 to 25% by weight. If the blending amount of the nonionic surfactant is less than 1% by weight, the effect of reducing the viscosity due to the addition will not be sufficiently exhibited. It should be noted that addition of a nonionic surfactant to the surfactant paste is an advantageous method for carrying out the present invention as described above, but the purpose of the present invention is mainly to use an anionic surfactant. It is a method for producing detergent particles using an activator paste as an activator component, and at the same time, it is for preventing adhesion troubles in the granulating apparatus. Therefore, it is desirable that the content of the anionic surfactant in the (a) surfactant paste is larger than the content of the nonionic surfactant. More specifically, the ratio of anionic surfactant to nonionic surfactant is 1/4 or greater, preferably 1/1.
Above, and below this, the detergency derived from the anionic surfactant cannot be sufficiently exerted.

The component (b) of carbonic acid or a salt of hydrogen carbonate and potassium (hereinafter referred to as potassium carbonate, etc.) includes
Potassium carbonate, potassium sodium carbonate, sodium hydrogen carbonate, potassium sesquicarbonate and the like are used. (C)
As the crystalline aluminosilicate of the component, zeolite Na is used.
-A, P type, etc. are used. Among the components (d), fine powders of silica, calcium silicate, magnesium silicate and the like are preferably used as the silica-based powder, and montmorillonite-based and smectite-based fine powders are preferably used as the clay-based powder.

In the present invention, the above-mentioned components (a) to (d),
Further, if necessary, for improving performance, an alkali builder such as sodium carbonate, sodium sulfite, various organic and inorganic chelate builders, and a fluorescent agent are used.
Detergent particles are obtained by granulating with a stirring or mixing granulator.

The addition amount of each component at this time is as follows. The amount of the (a) surfactant paste added is 10 to 70% by weight, and preferably 20 to 60% by weight. If this addition amount exceeds 70% by weight, the binder component at the time of granulation becomes excessive and the particle morphology cannot be retained.
If it is less than 10% by weight, the performance as a detergent is deteriorated. (B) The amount of potassium carbonate added is 0.5 to 40% by weight
And is preferably 1.5 to 30% by weight. If the amount added is less than 0.5% by weight, the adherence and solubility of the granulated particles may be deteriorated, while if it exceeds 40% by weight, the amount of other components to be blended may decrease, resulting in a decrease in detergency. There is a nature. The amount of the crystalline aluminosilicate (c) added is 3 to 50% by weight, preferably 10 to 30% by weight, from the viewpoint of ensuring detergency. (D) The silica-clay-based powder is added in an amount of 0.5 to 10% by weight as a single product or a combined amount, preferably 0.
It is 5 to 5% by weight. If the amount added is less than 0.5% by weight, there is almost no effect of reducing the adhesion to the granulator, and
If it exceeds 5% by weight, the amount of fine powder of granulated particles may increase.

As a stirring or mixing / mixing granulator used in the practice of the present invention, a continuous device, Sugi mixer (manufactured by Paulec), a turbulizer (manufactured by Hosokawa Micron Co., Ltd.), and a batch device, a high speed mixer ( Fukae Industry Co., Ltd.), a Ledige mixer, a rigid mixer and the like. Further, after granulation, sizing can be performed using a crusher or a crusher together with a crushing aid. Examples of the apparatus used at this time include Fitzmill (manufactured by Hosokawa Micron Co., Ltd.) and speed mill (manufactured by Okada Seiko Co., Ltd.).
Zeolite, sodium carbonate, and silica-based fine powder are used as the grinding aid.

By granulation, an average particle size of 200 to 1000 μ
It is possible to obtain detergent particles having a volume density of about m and a bulk density of about 0.5 g / cc or more. The detergent particles can be directly used as a high bulk density granular detergent composition. Also,
After granulation, it is also possible to add an inorganic compound such as fine powder zeolite having a particle size of 10 μm or less as a fluidity improver. Furthermore, it is also possible to powder-blend the above-mentioned high-bulk-density granular detergent particles with a chelating builder, an enzyme, etc., which are detergency-improving agents, to obtain a final detergent composition.
The chelate builder used here includes powder zeolite, sodium maleate-acrylic acid copolymer, β
-Alanidine sodium acetate and the like.

[0016]

INDUSTRIAL APPLICABILITY According to the present invention, adhesion to a granulator, which is a problem when a detergent composition containing an anionic surfactant at a high concentration is produced by a stirring or mixed granulation method, is reduced. And stable production becomes possible.

[0017]

【Example】

Examples 1 to 4 In accordance with the composition shown in Table 1, each component of the present invention, sodium carbonate, and other minor components except for 8 parts by weight of a surfactant paste and zeolite were continuously added to a turbulator (manufactured by Hosokawa Micron Co., Ltd.). Add and perform agitation granulation operation for 3 minutes,
The obtained granulated product was used together with 8 parts by weight of zeolite having an average particle size of 2 μm using Fitzmill (manufactured by Hosokawa Micron Co., Ltd.),
Grinding under the condition of screen diameter 1.5mm, average particle size 3
Detergent particles having a particle size of 00 to 700 μm and a bulk density of 0.5 to 0.9 g / cc were obtained. Table 1 also shows the results of scraping off the solid matter adhering to the inner surface of the granulator and the paddle and examining the adhering amount.

Comparative Example 1 According to the composition shown in Table 1, the same operation as in Example was carried out to obtain a detergent particle having an average particle diameter of 450 μm and a bulk density of 0.75 g / cc.
Table 1 shows the results of scraping off the solid matter adhering to the inner surface of the granulator and the paddle and examining the adhering amount in the same manner as in the examples. As is clear from the above examples and comparative examples, according to the production method of the present invention, the adhesion to the granulator can be reduced, and the stable production of the high bulk density granular detergent composition becomes possible.

[0019]

[Table 1] Table 1: Composition and evaluation results Example Comparative Example 1 2 3 4 1 Surfactant paste (%) 35.5 55.0 21.5 48.1 35.5 Paste composition: α-SF-Na (%) 20.0 30.0 5.8-20.0 AOS -K (%) − − − 25.0 − AES-Na (%) − − 4.0 − − Nonionic-1 (%) * 1 7.0 12.0 7.0−7.0 Nonionic-2 (%) * 2 − − − 10.0− Light agent (%) 0.5 0.5 0.5 0.5 0.5 Other components (%) 8.0 12.3 4.2 12.6 8.0 Viscosity * 3 (P) 30 20 25 40 30 Additive composition: Potassium carbonate (%) 10.0 15.0 5.0 2.0 25.0 Sodium carbonate (% ) 18.5 − 38.5 17.9 17.5 Zeolite (%) 30.0 20.0 30.0 30.0 20.0 Fine particle silica * 4 (%) 4.0 6.0 − − − Fine particle silicic acid (%) − 2.0 − − − Calcium * 5 Clay powder * 5 (%) − − 3.0 2.0- Other components (%) 2.0 2.0 2.0 2.0 2.0 Total (%) 100 100 100 100 100 Evaluation result: Adhesion amount (g) 1.5 2.5 2.0 3.2 25.5 * 1: Nonionic-1: Fatty acid ( _C18 ) polyoxy Ethylene methyl ether (EOp = 15), EOp: Molar number of addition of Chi alkylene oxide * 2: nonionic -2: higher (C ₁₃₎ alcohol (Dia
do1 13; manufactured by Mitsubishi Petrochemical Co., Ltd.) Polyoxyethoxy sheet (EOp = 25) * 3: Measured at 70 ° C using a B-type viscometer * 4: Tokseal N (manufactured by Tokuyama Soda Co., Ltd.) * 5: Fluorite (Tokuyama) Soda) * 6: Kunipia F (Kunimine Industries)

Continuation of front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display area C11D 3:08 3:10 3:12)

Claims (2)

[Claims] 1. A high bulk density granular detergent composition, which comprises granulating the following components (a), (b), (c) and (d) using a stirring or mixing granulator. (A) Surfactant paste containing at least one anionic surfactant: 10-70% by weight. (B) Carbonic acid or hydrogen carbonate and potassium salt: 0.5 to
40% by weight. (C) Crystalline aluminosilicate: 3 to 50% by weight. (D) Fine particles composed of silica-based powder and / or clay-based powder: 0.5 to 10% by weight. 2. The method for producing a high bulk density granular detergent composition according to claim 1, wherein the content of the nonionic surfactant in the surfactant paste is 1% by weight or more.