JPS62598A - Production of detergent composition - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a granular cleaning composition having high bulk density and excellent appearance.

At present, granular cleaning compositions are mainly manufactured by spray drying. The granules obtained by this method are hollow bead-like, so they have disadvantages such as low bulk density and a large packaging form, and also have problems in terms of flowability and appearance due to large surface irregularities. was there.

A common method for granulating spherical materials with higher bulk density is a one-dish granulator. This granulation method is a method of producing spherical granules by placing powder in a rotating plate and dropping water droplets onto it to form bridges. However, in this method, not only does the production process take a long time, but there is also considerable variation in the growth process of the nuclei due to the dropped water droplets, and there is considerable variation in the size of the produced spherical granules.

Furthermore, Japanese Patent Publication No. 58-44120 discloses the use of a marmereizer as a post-granulation device for cleaning compositions. Marmerizer is a special public 41-
This is a device described in Japanese Patent No. 563, which is composed of a cylinder and a disk at the bottom, and is a granulation device that rotates the disk at high speed to roll the granules and make them spherical. However, the marmerizer requires a drive device to rotate the disk, and since there is a clearance between the disk and the cylinder, problems such as material getting caught occur, making maintenance complicated. Furthermore, it is difficult to increase the size of the marmerizer device, the processing capacity is limited, and it is also difficult to operate continuously.

The present invention provides a method for producing a granular detergent composition with a high bulk density, which is easy to maintain and easy to increase the size of processing equipment.

Plate fish! ! The method for producing a cleaning composition of the present invention involves entraining a granular cleaning composition in a container with a gas swirl flow along the container wall surface for a sufficient time to increase the bulk density of the composition. The method is characterized in that the composition is brought into contact with the container wall surface and spheroidized and/or densified.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

FIG. 1 is a perspective view showing an example of a device used to carry out the invention, and has a shape similar to a cyclone. The container body 11 is formed from a cylindrical portion 11a and a conical portion 11b continuous to the cylindrical portion 11a. The granular detergent to be treated is entrained by the airflow and flows from the inlet 13 into the container body 11.
will be introduced in The airflow is introduced from the tangential direction of the cylindrical portion 11a, and forms a swirling flow along the inner wall surface of the cylindrical portion 11a. The granular detergent entrained by this air flow repeatedly contacts and collides with the inner wall surface, and is rubbed to smooth the uneven surface and become spherical or compact to form granules with a high bulk density. The granular detergent will eventually fall due to its own weight and reach the granule outlet 15.
On the other hand, the gas is discharged from the gas outlet 17.

The processing device shown in Fig. 1 is similar to a cyclone in terms of shape, but its intended use is different, so the dimensions, roughness of the inner wall surface, etc. can be selected according to the processing purpose of the present invention. can. For example, regarding one dimension, in a cyclone, the length and height of the conical part is usually 2 to 2.
However, in the present invention, the longer the length, the more opportunities the granules come into contact with the inner wall surface, which is advantageous in terms of spheroidization or densification. Furthermore, the treatment efficiency will be higher if the inner wall surface is made somewhat rougher than the particle size of the granules.

FIG. 2 shows another example of an apparatus for carrying out the invention, in which a hollow container body 11 having a conical outer wall and a conical processing chamber formed therein is provided with an inlet 13 and an outlet. 19 are provided. The airflow carrying the granular detergent to be treated is introduced from the inlet 13 into the container body 11 in a tangential direction, forming a swirling flow along the inner wall surface. The granular detergent comes into contact with the conical inner wall surface and repeats Wj protrusion to smooth out the uneven parts and is discharged from the discharge port along with the airflow.

The shape of the device main body shown in FIG. 2 may also be cylindrical.

Further, although FIGS. 1 and 2 show a cylindrical inlet and an outlet, they may also have a rectangular cylindrical shape.

FIG. 3 shows another example of the device used in the present invention, in which a pipe 21 is wound into a coil to form the container body 11. The airflow carrying the granular detergent to be treated is introduced into the container body 11 from the inlet 13 and flows along the winding of the pipe, thereby forming a gas swirling flow along the wall surface of the container. As in FIGS. 1 and 2, gas is generally introduced tangentially to the wound pipe. The granular detergent contacts and collides with the inner wall surface of the container, that is, the inner wall surface of the pipe 21, is treated in the same manner as described above, and is discharged from the outlet along with the air flow. In this case, the granular detergent is treated not only on the outer side wall 21a of the inner wall surface of the pipe 21 shown in FIG. 4, but also on the bottom wall 21b, so that the treatment efficiency is improved. Note that FIG. 4 is a cross-sectional view of one turn of the pipe 21. Such an effect can also be achieved by spirally providing an inwardly protruding partition plate on the inner wall of a container having a cylindrical or conical processing chamber. The granular detergent is rubbed not only by the inner wall surface of the container but also by contact with the upper surface of the partition plate.

Furthermore, in the device shown in Figure 3, by introducing the airflow at an angle rather than parallel to the virtual central axis of the pipe, a swirling flow can also be created within the pipe. According to the method, the entire inner circumferential wall of the pipe can be used for high bulk density processing, and the flow path distance of the granules is also increased, so that the processing efficiency is further improved.

The granular detergent composition to be treated is not particularly limited, but in order to impart plasticity and efficiently achieve spheroidization or densification, a surfactant or water as an active ingredient may be used.
It is preferable to include it in a large amount so as not to cause excessive tackiness. Such a granular detergent composition can be obtained by any known granulation method, such as extrusion granulation, crush granulation, transfer granulation, spray drying, and dry mixing. In particular, it exhibits a remarkable effect on granules obtained by extrusion granulation, crush granulation, and transfer granulation.

Air is the cheapest and most desirable gas, but inert gases such as nitrogen can also be used.

The temperature and humidity of the gas can be selected as appropriate, but in order to give the granules plasticity, the temperature may be higher than room temperature or the humidity may be set to 5.
It can also be set to 0% or more.

It is also possible to only increase the temperature in order to effect partial drying during processing.

The speed of the gas introduced into the container can be appropriately set within a range of speed sufficient to entrain the granules to be treated.

It is also possible to introduce gas into the container to form a swirling flow, and separately introduce the granular cleaning composition to be treated into the container and entrain it into the swirling flow, but this has already been explained in accordance with each drawing. As mentioned above, it is desirable to entrain the granular cleaning composition in advance into the processing container.

The treatment according to the invention is carried out for a period of time sufficient to increase the bulk density of the cleaning composition and can be controlled by the size and shape of the treatment equipment.

It is also possible to control the devices by connecting them in series in multiple stages.

According to the present invention, the granular detergent composition is entrained in the swirling airflow in the container, and the granular detergent composition is brought into contact with and collided with the wall of the container by centrifugal force, thereby achieving a higher bulk density. Granules can be obtained in high yields. This thing is
It has a small capacity per weight, making it suitable for transportation, supply, and storage, and since it is spherical, it has good fluidity and is pleasing in appearance. Unlike conventional granulation or granulation methods, the method of the present invention does not require a rotating body in the container or its driving device, so it does not require complicated maintenance and can easily be made larger or more continuous. It is suitable as a method for producing industrial granular cleaning compositions.

Example 1 The following composition was kneaded using a kneader.

014-0. Sodium α-olefin sulfonate
20 parts by weight Dodecylbenzenesulfonic acid 20 parts by weight Sodium hydroxide
6 parts by weight Type A zeolite
15 parts by weight sodium carbonate
15 parts by weight potassium carbonate
15 parts by weight 3 parts by weight of other additives 94 parts by weight of the obtained tightly mixed pellets (2 cm square) (moisture content 12 wt%) and 3 parts by weight of sodium carbonate were crushed using a crusher (manufactured by Okayama Seiko, Speed Mill ND-30 model). )
Quantitative feed was carried out. The crusher used crushing blades with a diameter of 15 cm in 4 stages rotating at 3,000 rpm, a screen of 2 gus, and a punching metal with an opening rate of 20%.

The bulk density of the resulting crushed granules was 0.60 g/cc. The crushed granules were entrained with air at an introduction wind speed of 20 m/s into a processing container shown in Figure 1 with the following specifications. Then, a fixed amount was fed.

Diameter of cylindrical container part: 15 cmφ Length of cylindrical container part: 15c+s Length of conical container part: 30 cm The processing container was passed through repeatedly to measure the number of passes per pass and the bulk density after passing.

(Margins below) Back” Chang Omote 1 0.61g/cc3
0.65g/cc5
0.70g/cc10
0.73g/cc15
0.75/cc Example 2 The same crushed and granulated product as in Example 1 was quantitatively fed into a coil-shaped container shown in Figure 3 with the following specifications by entraining an air flow at a wind speed of 15 m. The results are shown in Table 2.

Pipe diameter: 5c1φ Coil outer diameter: 30c- Number of coil turns: 6 (blank below) No. 1 Table 1 0.63g/cc3
0.70g/cc5
0.78g/cc10
0.82g7cc15
0.85/cc

[Brief explanation of drawings]

FIG. 1, FIG. 2, and FIG. 3 are perspective views showing an example of the configuration of a particle size regulating device used for carrying out the present invention. FIG. 4 is a sectional view of one turn of the pipe of the particle size regulating device shown in FIG. 3.

Claims (1)

[Claims] 1. A granular detergent composition is entrained in a gas swirl flow along the container wall in a container, and the composition is brought into contact with the container wall for a sufficient time to increase the bulk density of the composition to form a spherical shape. 1. A method for producing a detergent composition, characterized by densification and/or densification.