JPH0774355B2 - Method for producing granular nonionic detergent composition - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for producing a granular detergent composition containing a high concentration of a nonionic surfactant.

PRIOR ART At present, granular detergents are mainly produced by a spray drying method. However, when a detergent containing a nonionic surfactant is manufactured by a spray drying method, there is a problem that a part of the nonionic surfactant is decomposed or scattered during the drying, and it is necessary to take measures against exhaust gas pollution. Therefore, there is a problem that the amount and type of the nonionic surfactant used are limited.

U.S. Pat. No. 3838072 describes a method of spraying and impregnating spray dried builder substrate beads with a nonionic surfactant. However, this method requires a complicated operation for manufacturing the substrate beam, and requires a large amount of energy for spray drying.

In JP-A-61-26698, a spray-dried powder containing a nonionic surfactant is obtained, and the powder is sprayed with a nonionic surfactant, and further zeolite and alkali metal perborate are used as carriers. A method for producing a nonionic surfactant-containing composition having a high active agent concentration and a high bulk density, which comprises adding nonionic surfactant-containing granules, is described. However, the manufacturing method itself of this detergent composition requires extremely complicated operations. Further, the nonionic surfactant-containing granules are said to be produced by a granulator, and no specific production method thereof is shown.

OBJECT OF THE INVENTION The present invention provides a method for producing a detergent composition containing a high concentration of a nonionic surfactant in a simple and energy-saving manner.

The method for producing the granular nonionic detergent composition of the present invention comprises
20 to 50% by weight of liquid or pasty nonionic surfactant at 40 ° C. or lower; (A) zeolite and (B) light sodium carbonate of 50 to 80% by weight, and (A) zeolite and ( B) A raw material composition containing light sodium carbonate in a weight ratio of (A) / (B) = 75/25 to 25/75 is uniformly kneaded and mixed to form a solid detergent. The solid detergent is crushed into granules.

Hereinafter, the present invention will be described in more detail.

Any nonionic surfactant can be used as long as it is liquid or pasty at a temperature of 40 ° C. or lower. Granulation is difficult if it is not liquid or pasty. Preferred specific examples of the nonionic surfactant include primary or secondary alcohols having 8 to 18 carbon atoms to which ethylene oxide is added in an average of 3 to 20 moles, or primary or secondary alcohols having 8 to 18 carbon atoms. And ethylene oxide added on average 3 to 15 mol and propylene oxide on average 2 to 10 mol.

As the zeolite, aluminosilicate powder known as a builder for detergents can be used.

Light sodium carbonate is used, and heavy sodium carbonate cannot provide the effect of the present invention.

In the present invention, first, a raw material composition containing a nonionic surfactant, zeolite and light sodium carbonate (light ash) is uniformly kneaded and kneaded with a kneader or the like to obtain a solid detergent.

Light sodium carbonate impregnates nonionic surfactants, and zeolites become highly viscous materials when mixed with nonionic surfactants. By kneading these three components at an appropriate ratio, a solid detergent containing a high concentration of nonionic surfactant and easy to handle and granulate can be formed.

Knead only nonionic surfactant and light sodium carbonate,
When kneaded, in the case of a paste, when the amount of nonionic surfactant is small, it is impregnated with light sodium carbonate and becomes a dry state, and it does not become an integral body. In addition, when the amount is large, the nonionic surfactant exceeding the impregnated amount is in a state of leaching. When a liquid nonionic surfactant is used, it does not become a unit in any amount.

If only the zeolite and nonionic surfactant are kneaded and kneaded, there will be no particular problem if the amount of nonionic surfactant is small, but this realizes a granular detergent containing a high concentration of nonionic surfactant. Can not. When the amount of nonionic surfactant increases, it becomes a highly viscous one-piece, and the property of dilatancy appears, making it difficult to handle. .

As described above, it is necessary to knead and knead the three in an appropriate ratio, and the nonionic surfactant is added to the raw material composition at 20%.
-50% by weight, preferably 25-45% by weight. The total amount of zeolite and light sodium carbonate is 50 to 80% by weight, preferably 55 to 75% by weight in the raw material composition. Further, (A) zeolite and (B) light sodium carbonate are blended in a weight ratio of (A) / (B) = 25/75 to 75/25, preferably 1/2 to 2/1. To be done.

In the raw material composition, a conventional detergent component, for example, a fluorescent agent, an anti-soil redeposition agent, a builder such as baking soda or silicic acid, and a small amount of anionic surfactant detergent may be added.

The solid detergent obtained is then crushed to give a granular detergent composition. The crushing can be carried out by an appropriate crusher, but a cutter mill type having a screen classification mechanism is preferable. Alternatively, the kneaded product can be extruded and then crushed. The particle size of the granular nonionic detergent composition is 10
About 0 to 3000 μm is suitable.

The obtained granular product can be improved in powder characteristics by adding a water-insoluble fine powder, if necessary.

EFFECTS OF THE INVENTION According to the method of the present invention, a nonionic surfactant, zeolite and light sodium carbonate are kneaded in a specific ratio, mixed into a solid detergent, and then crushed and granulated to give a nonionic surfactant. A granular detergent composition containing a high concentration of is easily and energy-savingly produced, and there is no environmental problem such as scattering of nonionic surfactant into the atmosphere, which is extremely suitable as an industrial production method. .

The obtained granular nonionic detergent composition can be used alone as a detergent, or can be added to a conventional granular detergent as an additive.

Example The raw material composition shown in Table-2 was uniformly kneaded for 15 minutes with a table kneader, mixed, and then made into a cylindrical pellet of 5 mmφ × 15 mm with an extruder, and then crushed with a crusher to form a granular nonionic detergent composition. I got a thing. The properties and kneadability of the kneaded product at this time are also shown in Table 2.

The abbreviations of the nonionic surfactants in Table-2 are as shown in Table-1.

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

Claims (1)

[Claims] 1. A liquid or paste nonionic surfactant at a temperature of 40 ° C. or lower, 20 to 50% by weight; (A) zeolite and (B) light sodium carbonate in a total amount of 50 to 80% by weight, Moreover, the weight ratio of the above (A) zeolite and (B) light sodium carbonate is (A) / (B) = 75/25 to 25 /
Production of a granular nonionic detergent composition characterized in that a raw material composition containing in the range of 75 is uniformly kneaded and mixed to form a solid detergent, and then the solid detergent is crushed into granules. Method.