JPH08209195A - Production of granulated bleaching activator - Google Patents

Abstract

PURPOSE: To produce a bleaching activator with controlled dusting during the production thereof. CONSTITUTION: A mixture of a bleaching activator comprising an alkylcarbonyloxybenzenesulfonate of formula I or an alkylcarbonyloxybenzenecarboxylate of formula II with a binder is compacted at 25-100 deg.C, and the compacted material obtained is disintegrated by giving an impact and shear force thereto with a high-speed rotating knife cutter to produce a granulated material with a mean particle diameter of at least 300μm. In the formulas, R<1> is a 10-18C linear alkyl; R<2> is a 7C or higher linear alkyl; and M is a salt-forming cation or H.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a granulation product of a bleach activator for activating a peroxide bleaching agent such as a percarbonate, and various granules containing the peroxide bleaching agent. The present invention relates to a bleach activator granule useful as an additive to a bleaching agent, a bleaching detergent, and the like.

2. Description of the Related Art It is known that an organic peracid-generating bleaching activator causes hydrolysis due to the presence of an alkaline component and water in a detergent and loses its function. Various methods have been proposed as methods for preventing such decomposition. For example, in JP-A-58-11597, a bleaching activator is mixed with a liquid ethoxylated nonionic surfactant into a friable mass, which is then mechanically extruded by a screw to form an elongated extrudate. The method is described. This method has a problem that dust is generated when preparing a crushable mass, which is not preferable in the working environment.

[0002]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for producing a bleach activator granulated product in which dust generation is suppressed during the production of the bleach activator granulated product.

According to the present invention, a mixture of a bleach activator and a binder is preliminarily compacted under a specific condition, and the resulting compact is subjected to a predetermined size by a high-speed rotary knife cutter. It was made based on the finding that the above problem can be efficiently solved by cutting into the above. That is, according to the present invention, a mixture of a bleach activator represented by the general formula (I) or (II) and a binder is subjected to consolidation treatment at a temperature of 25 to 100 ° C. Disclosed is a method for producing a bleach activator granule, which comprises crushing by applying impact and shearing force with a rotary knife cutter to obtain a granule having an average particle size of 300 μm or more.

[0003]

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(Wherein R ¹ is a linear alkyl group having 10 to 18 carbon atoms, R ² is a linear alkyl group having 7 or more carbon atoms,
M is a salt-forming cation or hydrogen. ) The bleach activator targeted by the present invention is represented by the above general formula (I).
Or represented by (II). In the formula, R ¹ has 11 carbon atoms.
The linear alkyl group having 17 to 17 carbon atoms is preferable, the linear alkyl group having 9 to 18 carbon atoms is preferable as R ² , and the linear alkyl group having 11 to 17 carbon atoms is more preferable.
Examples of M include alkali metals such as sodium and potassium, amines such as ammonium and alkanolamine. Of these, alkali metals are preferred. In the formula, the SO ₃ M group and COOM group can be in the ortho, meta or para position, but the para position is preferred.

In the present invention, these bleaching activators can be used alone or as a mixture of two or more kinds. These bleach activators can be used in an amount of about
Since it can be obtained as a plate-like crystal having a size of m to 100 μm, it may be pulverized by an ordinary method so that the average particle size becomes smaller than 300 μm, preferably about 200 to 100 μm. However, when the bleaching activator has a mean particle size of less than 300 μm, preferably about 200 to 100 μm, it can be used as it is. In the present invention,
A raw material bleaching activator having an average particle size of more than 300 may be used.

The binder used in the present invention is preferably a water-soluble binder which is solid at room temperature and melts when heated, and more preferably has a melting point of 25 to 100.
It is an organic binder at 25 ° C, more preferably 25 to 80 ° C. Although various compounds can be used as long as they satisfy such requirements, in the present invention, it is particularly preferable to use polyethylene glycol having an average molecular weight of 400 to 30,000, and more preferably 1000 to 2
0000, most preferably 4000 to 20000 polyethylene glycol. It is also preferable to use a polyethylene glycol addition type nonionic surfactant,
Specifically, it has 8 to 20 carbon atoms (preferably 10 to 18).
It is preferable to add 3 to 80 mol, preferably 10 to 50 mol of ethylene glycol per 1 mol of the aliphatic alcohol.

The use of polyethylene glycol and / or polyethylene glycol addition type nonionic surfactants, among other binders, can improve the solubility of the resulting bleach activator granules. In the present invention, the use ratio of the bleach activator and the binder can be arbitrary, but the binder is 10 to 100 parts by weight, preferably 20 to 100 parts by weight per 100 parts by weight of the bleach activator.
It is recommended to use 70 parts by weight.

In the present invention, the bleaching activator and the binder are introduced into a closed type consolidation apparatus, preferably a horizontal continuous kneader, and the binder is melted after or while mixing them in the kneader. Then, a shearing force is applied to carry out the consolidation treatment at 25 to 100 ° C., preferably 40 to 80 ° C. In addition to the kneader, this consolidation treatment
It can also be carried out using a single-screw or twin-screw extruder. Specific examples of the consolidation apparatus used in the present invention include KRC kneader manufactured by Kurimoto Iron Works Co., Ltd. In the present invention, it is preferable to obtain a consolidated product having a bulk density of 0.3 to 0.9 g / ml by such a consolidation treatment.

In the present invention, the compacted product of any shape can be obtained by the above-mentioned consolidation treatment, and the compacted product has a diameter of 0.5 to 30 mm, preferably 0.7 to 20 mm, more preferably 1 to 20 mm. Extruded as strands or noodle-shaped granules such as cylindrical, prismatic and triangular prisms of a certain degree. As a method of extruding, a mesh plate having a hole may be attached to the outlet of the compacting device, and the granulated product may be obtained through this.
Specific examples of the processing device used in this case include an extruder Omix manufactured by Hosokawa Micron Corporation. Further, an extruder may be used for the consolidated product. Examples of the extruder include a pelleter double (Fuji Paudal Co., Ltd.) and a twin dome gran (Fuji Paudal Co., Ltd.). The obtained granulated product is then crushed into granules having an average particle size of 300 μm or more by applying impact and shearing force with a high-speed rotating knife cutter to give the average particle size. Here, the high-speed rotary knife cutter preferably has a rotational speed of 30 to 100 m / s in peripheral speed. A crusher that gives an impact and a shearing force to an object to be crushed by a high-speed rotating knife cutter is also called a crushing granulator, and examples thereof include Comminute (Fuji Paudal Co., Ltd.) and Fitzmill (Hosokawa Micron Co., Ltd.). The above-mentioned crushing can be carried out at any temperature, but it is preferable to carry out the crushing at a temperature of 20 to 60 ° C. Further, an arbitrary amount of grinding aid may be used during grinding. Examples of the grinding aid include carbonate and zeolite.

In the present invention, the average particle size is thus 3
Granules having a size of 00 μm or more, preferably 300 to 800 μm are produced. The granulated product of the present invention, as an activator of a peroxide bleaching agent such as a percarbonate, a bleaching agent for clothing, a bleaching agent for homes, a bleaching agent for tableware, a bleaching agent for pulp, a bleaching agent for pulp, etc. It can be widely used in applications where it can be used. Further, it can be used in various cleaning agents together with the peroxide bleaching agent.

[0011]

According to the method of the present invention, it is possible to efficiently produce a bleach activator granule while suppressing the generation of dust.
In particular, when the bleaching activator is granulated with a binder consisting of polyethylene glycol and / or a polyethylene glycol addition type nonionic surfactant, a bleaching activator granulated product having improved solubility can be obtained. Next, the present invention will be described with reference to examples.

[0012]

【Example】

Example 1 A bleaching activator granule was prepared by the following method. First, a bleaching activator having an average particle size of 1000 μm is pulverized by using a Henschel type mixer to obtain an average particle size of about 200.
A pulverized product of μm was obtained. On the other hand, S-manufactured by Kurimoto
Hot water was circulated in the jacket of the 1KRC kneader to heat the kneader body to a temperature of 50 to 80 ° C. Next, 150 g of bleach activator and 50 g of binder are added to a kneader and kneaded, and passed through a mesh plate having 20 to 40 holes with a diameter of 0.8 mm and a length of 10 to 100 mm.
A noodle-like granulated product was obtained. Cold air was applied to the noodle-shaped granules to bring the temperature to 40 ° C., and then the noodle-shaped granules were given an impact and a shearing force by a high-speed rotary knife cutter (Fismill manufactured by Hosokawa Micron Co., Ltd.) rotating at 50 r.pS. And crushed to produce a granulated product having a diameter of 0.8 mm and a length of 0.5 to 7 mm. (Bleaching activator No, A, B, C,
D, E, F, G, H, I); First, bleach activator 15 having an average particle size of 1000 μm
Circulate warm water with 0 g and 50 g of binder 50 to 10
After adding and kneading to the Extruded Omix heated to 0 ° C., a noodle-like granulated product having a length of 10 to 100 mm was obtained through the intermediate orifices of 6 mm and 3 mm and the discharge orifice of 0.8 mm. After applying cold air to the noodle-shaped granules to bring the temperature to 40 ° C., the noodle-shaped granules were mixed with 5
A high-speed rotating knife cutter (Fitzmill manufactured by Hosokawa Micron Co., Ltd.) rotating at 0 rps was applied to crush and crush the product to produce a granulated product having a diameter of 0.8 mm and a length of 0.5 to 7 mm. At the time of crushing, 5% by weight of type A zeolite was added to the granulated product as an auxiliary agent. (Bleaching activator No.
J. K. L). The bleach activators used are shown in Table-1, and the types of binders are shown in Table-3.

[0013]

[Table 1] Table-1 Bleach activator Bleach activator No R X AC ₁₁ H ₂₃ SO ₃ Na BC ₁₃ H ₂₇ SO ₃ Na CC ₁₅ H ₃₁ SO ₃ Na DC ₁₇ H ₃₅ SO ₃ Na E C ₁₁ H ₂₃ COONa F C ₁₃ H ₂₇ COONa G C ₁₅ H ₃₁ COONa H C ₉ H ₁₉ COONa I C ₇ H ₁₅ SO ₃ Na J C ₇ H ₁₅ COOH K C ₉ H ₁₉ COOH L C ₁₁ H ₂₃ COOH The bleach activator in the table is the following formula. (III).

[0014]

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The dust-generating property of the granules produced in this way is measured by the DIGITAL DUST INDICATOR MODELP manufactured by Shibata Co., Ltd.
-5 Using a polypropylene container with a height of 45 cm and a length x width of 30 cm equipped with a dust measurement device on the top,
Evaluation was performed according to the procedure of. 25 g of the bleach activator granulated product is put into the charging port of the above dust measurement device. Quickly open the inlet and drop it into the device to start the dust meter. The count number after 1 minute is measured. (Indoor conditions: 25
C., 60% RH) The obtained results were evaluated according to the criteria of Table-2. The results are shown in Table-3.

[0016]

[Table 2] Table-2 ────────────────────────────────── Make the powder stand and feel the powder stand Sensual level that can be felt Count that does not feel but can be felt after 1 minute (cpm) <35 35-70 70-90> 90

[0017]

[Table 3] Table-3 Bleach activator No Binder No Count number (cpm) Inventive product A 125 Inventive product B 2 30 Inventive product C 2 33 Inventive product D 1 30 Inventive product E 1 35 Inventive product F 3 30 Inventive product Product G 1 30 Invention product H 1 35 Comparative Example I 1 90 Invention product J 1 35 Invention product K 1 25 Invention product L 3 25 Binders in the table are as follows. Binder No1: PEG6000 Binder No2: PEG20000 Binder No3: EMALEX750 (ethylene oxide average 50 mol adduct of lauryl alcohol)

Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display area C11D 7:34)

Claims (3)

[Claims] 1. A mixture of a bleaching activator represented by the general formula (I) or (II) and a binder is subjected to a consolidation treatment at a temperature of 25 to 100 ° C., and then the obtained consolidated product is rotated at a high speed. A method for producing a bleach activator granulated product, which comprises crushing by impact and shearing force with a knife cutter to obtain a granulated product having an average particle size of 300 μm or more. Embedded image (In the formula, R ¹ is a linear alkyl group having 10 to 18 carbon atoms,
R ² is a linear alkyl group having 7 or more carbon atoms, and M is a salt-forming cation or hydrogen. ) 2. The method according to claim 1, wherein a bleaching activator represented by the general formula (I) or (II) having an average particle size of less than 300 μm is used. 3. The method according to claim 1, wherein the binder is polyethylene glycol or a nonionic surfactant.