JPS5917159B2 - Synthetic detergent formulation method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for blending synthetic detergents, and is characterized in that a thick slurry suitable for spray drying can be continuously produced and the blending composition can be easily changed. .

Conventionally, powdered detergents are made by blending various components in predetermined proportions to form a slurry, and then powdered by spray drying.

Since this slurry requires mixing a large number of ingredients in a predetermined ratio, it is usually done in a so-called batch method, in which each ingredient is added to a mixing tank and mixed uniformly, and two mixing tanks are used. Continuous operation is possible by preparing the above and using it alternately, but although it is a blending tank, it is extremely complicated in terms of switching operations of the blending tank. 5 The present invention relates to a continuous blending method, and an example will be described with reference to the drawings.
The slurry in the mixing tank 1 is circulated by the pump T and pipes 4, 8, and 9, the liquid component is supplied to the suction port of the pump 7 through the pipe 6, and the powder component is supplied from the upper part of the mixing tank 1 through the supply port 10. , 9 The slurry is sent to the mixing tank 3 through an overflow pipe 2 provided above the side wall of the mixing tank 1, and the slurry is extracted by a pipe 11 and a pump 12.

Among the liquid components to be supplied, sulfonated substances or sulfated substances (generally referred to as S agents) are not neutralized in advance, but are added to the tubes 18 and 1 in a predetermined ratio with the concentrated caustic soda aqueous solution.
It is preferable to supply the fluorescent dye to the suction port of the pump 1 through the feeder 8', and preferably to mix the fluorescent dye with the powder component using the mixing feeder 23 before supplying it from the supply port 10.

In addition, 5 in the figure is a return pipe from the mixing tank 3, and 1? A partitioned chamber 19 is formed in close proximity to the side wall of the mixing tank 1 using a bar plate, and an overflow pipe 2 is attached above the partitioned chamber 19. 13,
14 is a pipe, 15 and 16 are: an agitator, 21 is a line mixer, and all other instruments or valves are omitted.

In the present invention, since the liquid component is supplied to the suction port of the pump □ through the pipe 6, the liquid component is mixed into the slurry in advance, and the liquid component is first mixed uniformly into the slurry.

Powder components are introduced from the supply port 10 above the blending tank 1,
The liquid components will be dissolved into a uniformly mixed slurry. If both the liquid and powder components are supplied from above the mixing tank 1, the composition of the slurry with which the powder components come into contact will vary widely, resulting in variations in the rate of dissolution of the powder components, and overall it will take an extremely long time to dissolve the powder components. This is undesirable because it causes variations in the composition of the product. Furthermore, the present invention provides S
By supplying the agent to the suction port of the pump 7 through pipes 18 and 18' in a predetermined ratio together with a concentrated aqueous solution of caustic soda without previously neutralizing it in a neutralization tank, a slurry with an extremely low water content can be made. It is possible.

When neutralizing the S agent in a neutralization tank, it is common to add a certain amount of water to neutralize it, but since it is difficult to remove water mixed into the slurry before spray drying, this method is not recommended. As in the invention, it is preferable to blend the ingredients while adding as little excess water as possible, and to complete neutralization during blending. If it is difficult to form a slurry due to the lack of powder components and lack of water due to the blended composition, add water as appropriate to make the slurry as thick as possible with the minimum amount of water and reduce the amount of heat used by spray drying. It is possible to measure. When blending fatty acid soap, it may be supplied to the suction port of the pump 7 through the line mixer 22 through the pipes 20 and 205 in a predetermined ratio together with the concentrated aqueous solution of caustic soda without being neutralized in advance, as with the S agent. good. Reference numeral 24 indicates various liquid component supply pipes.

In addition, if trace components such as fluorescent dyes are added alone to the mixing tank, they will dissolve in some of the slurry and take a long time to homogenize, so they are mixed with powder components that have a relatively slow dissolution rate in the slurry before being supplied. By doing so, it can be uniformly blended into the slurry.

In the case of changing the blending composition, all the slurry in the blending tank 3 is returned to the blending tank 1 through the pipe 5, and the remaining amount of each component is calculated from the amount and composition of the slurry in the blending tank 1, and the slurry is changed to the changed blending composition. What is necessary is to add the missing components so that the amount of the components becomes insufficient, and then start operation while supplying each component at a predetermined ratio.

According to the present invention, the slurry in which the liquid components are uniformly mixed is circulated, the powder components are added and mixed into the slurry, and the slurry is caused to overflow through the jamb plate, so the residence time in the mixing tank is long. In addition, the powder components are rapidly dissolved, resulting in a blended detergent with a uniform composition.

Furthermore, since the residence time is constant, there is no change in viscosity due to hydration, making it easier to control the spray during spray drying. On the other hand, in the case of conventional batch-type spraying, the viscosity changes due to the difference in residence time between the initial and final stages of spraying, making it difficult to control the spray.

[Brief explanation of the drawing]

The drawing shows a flowchart of an embodiment of the invention. 1, 3...Mixing tank, 2, 5, 8, 9, 11...
...Tube, 6...Liquid supply port, 7...
Pump, 10...Powder supply port, 17...
・Jama board, 19... Compartment room.

Claims (1)

[Claims] 1. The slurry in the mixing tank 1 is pumped through the pump 7 and the pipes 4, 8, 9.
The liquid component is supplied to the suction port of the pump 7 through the pipe 6, and the powder component is supplied from the upper part of the mixing tank 1 through the supply port 10, and is formed by a baffle plate 17 close to the side wall of the mixing tank 1. Overflow pipe 2 provided above the compartment 19
The slurry is sent to the mixing tank 3 by the pipe 11 and the pump 1.
2. Synthetic detergent formulation method in which slurry is extracted. 2. Among the liquid components, the sulfonated or sulfated compounds are supplied to the inlet of the pump 7 through the pipes 18, 18' in a predetermined ratio with the concentrated aqueous sodium hydroxide solution without being neutralized in advance. The method described in Section 1. 3 The fluorescent dye is mixed with the powder component in advance and then passed through the supply port 10.
2. A method according to claim 1, wherein the method is characterized in that the method is characterized in that the method is characterized in that it is provided by: