JPS6023159B2 - Manufacturing method of granular detergent - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention uses a vertical rolling granulator with rotating blades in the production of powdered cleaning agents to mix cleaning aids and surfactants and dry them without heating. It's about how to do it.

There are two conventional methods for manufacturing powdered cleaning agents:

H. Spray dryer method In this case, a surfactant and a cleaning aid are dissolved together in water (referred to as a slurry), and this is dropped from a high place into a mist, heated midway through the process, and turned into powder. It is also allowed to dry. This method is suitable for mass production and is currently used in most cases, but not only does the heating fuel account for 10% of cleaning agent production, but the pollution caused by flying powder has also become a topic of discussion. . 0 Dry Blending Method This method is a method in which a surfactant solution and a cleaning aid are placed in a tank as they are and mixed together.

In this case, because the liquid and powder are in direct contact, primary agglomeration and coarse particles are likely to occur, and a dryer, a divider, and even a granulator must be used as ancillary steps. Therefore, the work efficiency is extremely low and it is unsuitable for mass production. The purpose of finishing the cleaning agent in granular form is not only to give it fluidity and facilitate automated production, but also to prevent secondary agglomeration of the packaged product during storage, or to make it more soluble in water when used. This is for the sake of The present invention
Instead of the rope machine used in dry blending, a vertical rolling granulator with rotating flat blades (in most cases, multiple blades) is used, and by specifying the type and composition of the surfactant and adjuvant, This method accomplishes everything from mixing of both mixtures to drying in just one step, and two major elements are necessary to achieve the purpose of the present invention.

That is, [1] The mixture of surfactant and auxiliary agent dries up in an extremely short time without heating. For this purpose, the following considerations are made in the present invention. In other words, in order to reduce the amount of the surfactant mixture, the nonionic surfactant was used as the main ingredient.

The detergency of surfactants is usually expressed as a numerical value of 1 for soap, an eagle for anions, and 0 for non-ions. In the present invention, the nonionic surfactant is used as the main ingredient, and some anions are added thereto in order to reduce the amount of surfactant by utilizing the mutual effect. {o} Utilizing frictional heat and reaction heat.

In the present invention, a net flocking machine (
Compared to the propeller rotation speed of 50 to 80 per minute in the case of a ribbon mixer (in many cases), even a flat blade has a propeller rotation speed of 50 to 3 per minute.
000, and the temperature rise due to internal friction of the particles also reached 500
~80 qo, which is useful for drying. Furthermore, sodium carbonate, which is contained in a large amount in the adjuvant, is easily decomposed by the water in the activator, further promoting the temperature rise.

Moisture absorption effect of sodium carbonate Since anhydrous sodium carbonate is used, water in the surfactant liquid is absorbed and becomes crystal water.
Moisture does not appear in the grains.

■ Mix surfactant and auxiliary agent in the same reaction cylinder in a very short time, then crush and granulate them.

The method of the present invention that satisfies this element uses a vertical transfer granulator with a flat blade 2, and in the cylinder 1, 10 anchors of a cleaning aid mainly composed of anhydrous sodium carbonate are placed in advance, A nonionic surfactant selected from alkanolamide, alkylamine oxide, and polyoxyethylene alkyl ether, and an anionic surfactant selected from alkyl sulfate, olefin sulfonate, alkyl ether sulfate, and alkylbenzene sulfonate. Add 7 parts to 3 parts of a mixture containing 50 to 95% of the total amount of nonionic surfactant, and operate the flat blade 2 at 500 to 3000 revolutions per minute to reduce friction and reaction heat. This is a method for producing a powdered detergent, which is characterized by crushing and drying under a temperature increase caused by

Among the nonionic surfactants used in the present invention, the alkanolamide is lauryl ethanolamide, the alkylamine oxides are cocodimethylamine oxide, stearyldimethylamine oxide, and lauryl dimethylamine oxide, and the polyoxyethylene alkyl ether is polyoxyethylene. Examples include alkyl ether, polyoxyethylene oleyl ether, polyoxyethylene stearyl ether, polyoxyethylene cetyl ether, polyoxyethylene lauryl ether, and the like.

To explain the drawings below, the vertical transfer granulator has cylindrical 1
Inside, the rattan is used as a rotating shaft 4, and one or several stages of flat blades 2 are provided.

The cleaning aid 6 dropped from the cleaning aid hopper 7 and the surfactant mixture dropped from the surfactant tank 5 are placed on the cylinder 1 located above the main body 8 of the vertical rolling granulator. Both mixtures are rotated gently as a whole by the flat blade 2 that rotates at high speed around the rotating shaft 4 with little deflection, and are also moved up and down by the action of the scraping blade 3, causing them to fly. On the other hand, the flat blade rotates at high speed, and the solid particles colliding with the blade surface are crushed, rolled, and mixed by scale-cutting force and centrifugal force, and are subsequently pulverized. The rotation speed affects the particle size distribution of the product as well as the precision of the particle surface, resulting in superiority or inferiority in terms of value in practical use.

For example, excessive rotation tends to generate fine particles, resulting in [
i) It releases characteristic powder during work (senta〈) and causes coughing in the human body.

(ii) When dropped into still water, the powder may float on the water surface or the powder may aggregate.

This may cause other inconveniences.

According to the method of the present invention, the particle size of the product is much more uniform than that obtained through the sieving process using a ribbon mixer, and the product absorbs the surfactant uniformly, so the product absorbs the surfactant uniformly over time. No blocking occurs.

Therefore, it is possible to obtain the effect that the product value does not decrease. Next, the present invention will be specifically explained with reference to Examples.

Example 1 The following vertical rolling granulator was used.

Model: VG-2 tsubo Manufacturer: Fuji Sangyo Co., Ltd. Total capacity: 30 degrees Cylinder diameter: 35 degrees Rotational speed: 850 per minute Elevation angle of flat blade: 20 degrees The surfactant and auxiliary agents used as raw materials are as shown in the table below.

Charge 5,100 g of auxiliary agent into the cylinder of a vertical transfer granulator,
While pre-rotating, 1,400 quarts of surfactant maintained at about 40 qo was dropped on top of this, and as the rotation continued, the entire body moved up and down while gently rotating due to the action of the flat blade and scraping blade, and the granules The internal temperature of is 10-1 after 2 minutes.
50, the powdering was completed, and about 6,200 pieces of dry, non-powdered cleaning agent were obtained.

Example 2 The following vertical rolling granulator was used.

Model: SM old-200 Manufacturer: Kawada Seisakusho Total capacity: 2
00 cylinder diameter 650 side rotational speed 500 per minute Elevation angle of flat blade 25o Raw material surfactant and auxiliary agent are as follows.

Charge IO0kg of adjuvant into the cylinder of a vertical rolling granulator,
After pre-rotating for 2 minutes, dropping of surfactant 28k9, maintained at approximately 40°C, was started.

When the rotation was continued during this time, the internal temperature of the particles was 50 to 5.
When the temperature rose to 500, the powdering was completed, and it took about 5 minutes to discharge the powder. The weight of the product was approximately 121 kg in a dry state.
In the case of Examples 1 and 2 above, almost complete mixing took place one minute after the completion of the surfactant dropwise addition, and the particle size distribution of the resulting products was as shown in the following table.

That is, the weight of mesh 100 is the largest at 35.1%, which is the average value of the weight of mesh +65 to 200,
Furthermore, particles having a particle size within this range account for approximately 80% of the total weight.

Product particle size distribution:

[Brief explanation of drawings]

The drawing is a partially sectional front view of an apparatus for carrying out the method of the invention. 1... Cylindrical, 2... Flat blade, 3... Scraping blade, 4.
... Rotating shaft, 5 ... Surfactant tank,
6...Cleaning aid, 7...Cleaning aid tank, 8...Vertical rolling granulator body.

Claims (1)

[Claims] 1 Using a vertical rolling granulator with flat blades 2, alkanolamide, alkylamine oxide, and polyoxyethylene were added to 100 parts of a cleaning aid mainly composed of anhydrous sodium carbonate previously stored in the cylinder 1. Consists of a nonionic surfactant selected from alkyl ethers and an anionic surfactant selected from alkyl sulfates, olefin sulfonates, alkyl ether sulfates, and alkylbenzene sulfonates, with the nonionic surfactant accounting for 50 to 95% of the total amount. 7 to 30 parts of the mixed liquid is added, and the flat blade 2 is operated at a speed of 500 to 3000 revolutions per minute to raise the temperature due to friction and reaction heat.
A method for producing a powdered cleaning agent, which comprises crushing and drying.