JPS6072998A - Manufacture of surfactant powder composition with high powder properties - 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 surfactant powder composition, and more particularly to 4. A free-flowing surfactant powder composition containing active ingredients at a high density and concentration, which is missing from the surfactant powder floor detergent. The present invention relates to a method for producing an interfacial viscosity agent powder composition with excellent properties.

Conventionally, powder compositions based on anionic surfactants were obtained by spray drying slurry at °C, but in recent years, from the viewpoint of saving energy and precious resources.

Methods that do not involve spray drying are being proposed.

However, no satisfactory method has yet been found for products with high concentrations of anionic surfactants. For example, US Pat. No. 5,454,947 describes the dry neutralization of alkylbenzenesulfonic acids with sodium bicarbonate, but the neutralized product is in the form of a paste (Bar).

Conventionally, it has been difficult to manufacture ABS-based anionic surfactants with good powder flowability as high IA products.

Therefore, the present inventors sought to obtain a method for producing a highly concentrated anionic surfactant powder composition with excellent free-flowing properties based on ABS. As a result of intensive research, the present invention was completed.

That is, in the present invention, alkylbenzene sulfonic acid and alkyl sulfuric acid ester are mixed in a weight ratio of 2 to 10 mol per 1 mol of these unneutralized substances together with 2 to 10 mol of sodium carbonate and 1 to 10 mol of water. Mix in a strong shearing device such as a machine.

The present invention provides a method for producing a patented activator powder composition, which is characterized in that it is neutralized and then pulverized.

The alkylbenzene sulfonic acid used in Honko'IIJ is obtained by sulfating a linear or branched alkylbenzene having an average of 10 to 16 carbon atoms by a known method. Usually, it is obtained by contacting benzene with diluted SO gas to carry out a reaction, and then hydrolyzing the acid anhydride that remains in the residue. Purity 92-98%! 1IH4Hao, s~4%, water 0.2
-1.0% and oil content of 0.5-4% is the composition usually obtained.

The alkyl sulfate ester used in the present invention is an aliphatic alcohol having an average carbon number of 10 to 18 produced by reducing triglycerides such as tallow or coconut oil, or a synthetic alcohol obtained by, for example, oxy synthesis or Ziegler synthesis. Can be produced by sulfation. Purity 9
2-98%, free sulfuric acid 1-4%, unreacted alcohol 1-
4% is the composition usually obtained directly from sulfation. Alkyl sulfate esters decompose during storage and float at °C.
It becomes iR acid and fatty alcohol.

Therefore, in carrying out the present invention, it is desirable to sulfate the material at a temperature as low as possible and then immediately send it to the neutralization device. Once stored, it is necessary to keep the residence time within several hours and at a temperature as low as possible above the melting point of the alkyl sulfate.

In the present invention, it is important that the ratio of the alkylbenzenesulfonic acid and the alkyl sulfate ester is in the range of 0 to 0 in terms of M amount ratio. If this ratio is thicker than chopsticks, the grinding will be fine.
Less free-flowing.

Moreover, if this ratio is smaller than %, it is practically the same as using only alkyl sulfate, and there is no advantage in terms of manufacturing cost (1), which is not suitable for the purpose of the present invention.

The temperature of sodium carbonate used in the present invention is dense ash (
It may be either light ash (apparent specific gravity 0.6) or light ash (apparent specific gravity 0.6).

Since the reaction mainly occurs through the surface of sodium carbonate, light ash with a larger specific surface area has better reactivity. It is also possible to use a pulverized product of sodium carbonate, which also provides better reactivity.

As sodium carbonate, anhydrous or monohydrate can be used. If the amount of sodium carbonate is less than 2 moles per 1 mole of unneutralized material, the reactivity will be low and one reaction will take a long time, and many fish will remain in the unneutral phase acid state until the subsequent process. It has an adverse effect on physical properties, etc. Also, if the amount of sodium carbonate exceeds 10'' moles, the effect on one reactivity is too large (which is not preferable from an economic standpoint as well as from the purpose of concentration).

Moisture is the water content of other ingredients added during neutralization.

Water is introduced from the water in the sodium carbonate and the water in the unneutralized product, but it is also possible to add only water.

Other components added during neutralization include an aqueous sodium hydroxide solution, sodium silicate and an aqueous solution thereof, a high molecular weight organic polymer containing a carboxy group and/or a hydroxyl group, and an aqueous solution thereof.

Polyalkylene glycols and aqueous solutions thereof, fragrances and aqueous solutions thereof, fluorescent dyes and aqueous solutions thereof.

The basic ingredients are pigments and their aqueous solutions that act effectively as detergent ingredients. Although it is possible to add a small amount of a builder such as zeolite during neutralization, it is not preferable to add a large amount because the skeletal structure of the zeolite is damaged by the acid and the ion exchange ability of the zeolite itself is reduced.

Some of these components that can be introduced have the effect of promoting the neutralization reaction. For example, addition of a small amount of aqueous sodium hydroxide solution and aqueous sodium silicate solution not only accelerates the neutralization reaction but also contributes to the reaction with unneutralized substances as an alkali component. As sodium silicate, silicic acid /i! rfi! Sodium salts such as sodium metasilicate and its hydrates in various proportions, sodium orthosilicate, etc. can be used, and water glass and the like are also practical.

High molecular weight organic polymers containing carboxyl groups and/or hydroxyl groups and aqueous solutions thereof are effective as detergent components, and those having a molecular weight of 500 to 100,000 are usually used. By introducing these components at the time of neutralization and mixing, it is possible to provide a suitable hardness as a detergent at a temperature of 0.degree.

Compounds suitable as organic polymers containing carboxyl groups and/or hydroxyl groups include acrylic acid, hydroxyacrylic acid, maleic acid, itacon rR
, mesaconyl, aconitic acid, polymers and combinations of these compounds, and polyvinyl alcohol. Examples of polyalkylene glycols include polyethylene glycol, polypropylene glycol, and polymers and copolymers of the like.

In the present invention, when less than 1 mole of water is introduced per mole of unneutralized material, the speed of the neutralization reaction is slow (in order for the reaction to proceed, a long residence time is necessary). Therefore, it is not practical.On the other hand, it is not practical to introduce 10 moles or more of water per mole of unneutralized material.

There is also a problem with the stickiness of the obtained neutralized product.

This is unsuitable because the crushing process in the subsequent process cannot be carried out smoothly. The amount of water is preferably 1 to 5 moles per mole of unneutralized mixture.

The apparatus used for the neutralization reaction in the present invention is as follows.

It is a device that can apply a strong shearing force like a crosstalk machine, and is
al), multi-bar bus continuous mixer (B
AKIERPERKINS lN00).

KRCi kneader (Kurimoto Iron Works Co., Ltd.), Nesco kneader (Fuji Sangyo Co., Ltd.), etc.
It has a 414# 'l [like 'a'], and has a continuous seven cleaning mechanism features.

Neutralization may be completed during mixing in the neutralizer 4, or may be completed after mixing and aging.

Cooling and aging are carried out using fluidized bed, belt sorting machine, pneumatic transport,
This can be done by cooling with an air slider, stirring and cooling, etc. Cooling layer and pulverization are usually carried out to below 60°C. Appropriate crushers include Fitz Mill, Linrex Mill (Honkawa Micro Co., Ltd.), Paraplex (Fuji Sangyo Co., Ltd.), and Rotary Cutter Mill (Nara Kikai Co., Ltd.).

At this time, other components can be added as necessary. For example, if the composition according to the present invention is used for detergents, aluminosilicate, silicate, phosphate, tir
Known detergent formulations such as salts, fragrances, pigments, nonionic surfactants, foam stabilizers, fabric softeners, whitening agents, etc. can be added and milled simultaneously.

In the method of the present invention, the neutralized product obtained by neutralizing only the alkylbenzene sulfone enemy with sodium carbonate, or the neutralized product obtained by drying an aqueous solution neutralized with a sodium hydroxide solution, is as follows.

It has viscous properties, which poses problems in processes such as pulverization, and it also has the disadvantage of powder physical properties in that when blended into highly concentrated powder detergents, products with uniform fluidity cannot be obtained. According to the present invention, the powder properties of the neutralized product are improved to make it more comfortable to wear, and when blended into a highly concentrated powder detergent, a product with excellent homogeneous fluidity can be obtained, and the decomposition of the alkyl sulfate ester is also reduced. It has the advantage of being comparable.

Examples of the present invention will be shown below, but the present invention is not limited by the examples.

Example 1 FM-NH3-120 type Nesco kneader (Fuji Sangyo (d
A quantitative amount of #4iFi# = coolant having the following composition was supplied to the product (manufactured by e).

The linear alkylbenzene sulfonic acid used was one that had been sulfated by a conventional method and then stored at about 30°C.

Purity 96%, free sulfuric acid 1.2%, moisture 0.4%, oil content 2
．． It was 4%. Further, the alkyl sulfate was used in this example immediately after forming the sulfated layer by a known method. The average dIY distillation time from the sulfation device to the neutralization device was about 1 hour.

The reactant was at about 70°C when it came out of the neutralization device, and it was cooled to about 30°C using a belt cooling device, and was ground to a particle size of less than s, o o o μ to form a surfactant with the following composition. A powder composition was obtained.

The obtained surfactant powder was smooth and easy to handle.

Add 20% by weight of zeolite powder to this powder.

Reviews as a detergent: 1i [I made/made 1i. The results are shown in Table 1.

In addition to the alkyl sulfate of Example 1, 15ky
A similar operation was carried out using a linear alkylbenzenesulfonic acid with an increased concentration of /H, but pulverization was extremely difficult. Zeolite was added in an amount of 20% by weight to the obtained powder and evaluated as a detergent in the same manner as in Example 1. The results are shown in Table 1.

The evaluation method for detergents in Table 1 is as follows.

1) Detergent power was measured according to the JrS method using a commercially available detergent as a standard and using the Xienhue paired comparison method.

At a risk rate of 5%, 10 superiority ± same one inferior l) Foaming power Pour 20°C tap water 5a43 into a commercially available recreational washing machine, add detergent 20I (commercially available detergent is 40I) to 6 and dissolve. Cotton skin * 1 ky and artificial oily dirt (cottonseed oil) were added, and the foaming state was determined after 10 minutes of inversion.

m) Keep the soluble ion exchange water 14 at 10° C. and gently stir it with a magnetic stirrer, and add detergent 1.551. After 5 minutes, the detergent solution was passed through a 200 mesh sieve, and the residue on the sieve was weighed.

IV) Enclose the detergent powder in a commercially available detergent carton without a caking moisture barrier. The product of this invention is 22m (W) x 50.
51') II (H) X 6.5 m (D) 2.
6kl, control product is 25.5 x 57.5 x 10
2.6kl was sealed in the box. Three measurements were taken at 30° C. and 80% RH, and the passage rate CG) was calculated using the following formula.

Table 1

Claims (1)

[Claims] 1 A mixture containing an alkylbenzene sulfonic acid and an alkyl sulfate ester in a weight ratio of ~% was mixed and neutralized with 2 to 10 mol of sodium carbonate and 1 to 10 mol of water per 1 mol of the mixture under strong shearing force. A method for producing a surfactant powder composition, which comprises rolling and grinding.