JPS6064624A - Surfactant - Google Patents

Abstract

PURPOSE:To obtain a surfactant having a large defoaming rate, by containing sulfonate of a trimer-pentamer of butylene as a main component. CONSTITUTION:Sulfonate of polybutylene being a trimer-pentamer of n-butylene, iso-butylene or a mixture thereof is used a main component. As a salt of sulfonic acid, an alkali metal salt, an alkaline earth metal salt, an amine salt or an ammonium salt are designated. In preparing a surfactant, alkylbenzenesulfonate or ethylene oxide adduct of phenols can be appropriately added other than the above-mentioned main component.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a surfactant, and more particularly to a surfactant with a high defoaming rate.

In particular, dodecylbenzene sulfone soda and lauryl sulfate soda are widely used in the industry.

However, conventional surfactants have a strong foaming property and a very low defoaming rate.

As a result, environmental deterioration in rivers and other areas has become an extremely serious problem.

Therefore, as a result of intensive research to develop a surfactant with a high defoaming rate while maintaining conventional excellent properties such as detergency, permeability, and foaming properties, the present inventor found that a specific alkenyl sulfonic acid They discovered that salts are useful and completed the present invention.

That is, the present invention is a surfactant whose main component is a tri- to pentamer-sulfonate of butylene.

Here, the 5-5-unit sulfonate of butylene is the main component of the surfactant of the present invention, and refers to 3-5 units of n-butylene, imbutylene, or a mixture thereof, that is, the average carbon number. 12. I.S.

20 butylene oligomer sulfonate.

Here, the sulfonation rate of the butylene oligomer is not particularly limited, but is usually 40 to 80%, preferably 60 to 70%.
It is. Among the salts of sulfonic acid, such as alkali metal salts, alkaline earth metal salts, and amino acid salts, sodium salts are most preferred. When used as a surfactant, sulfonic acid salts of butylene trimers, tetramers, and snl'l oligomers can be used alone or in combination of two or more.

The butylene trimer-pentamer sulfonate used in the present invention can be produced by various methods, but usually, butylene hexa-pentamer is sulfonated by a total reaction with sulfuric anhydride or sulfuric acid, and then sulfonated with sulfuric acid. The conditions for oxidation vary depending on the type of raw materials, etc., but generally K ki SOs /butylene oligomer (mole ratio) = 1.1 to 2.0 and the reaction temperature is room temperature to 8.
The reaction is carried out at 0°C and at a reaction time of 1 minute or more.

In addition, saponification is usually carried out at an amount equivalent to or more than the amount of alkali added.
The reaction is carried out by heating to 00 to 130'C and reacting for 1 hour or more. Furthermore, unreacted raw materials and the like are removed to obtain the desired butylene oligomer sulfonate.

A surfactant is produced using the butylene penta-pentamer sulfonate obtained as described above as a main component. In that case, other components such as alkylbenzene sulfonates, ethylene oxide adducts of phenols, etc. may be added as necessary.

The surfactant of the present invention has the same performance (surface tension, penetration power, initial foaming property, etc.) as conventional typical surfactants, but its defoaming rate is significantly higher than that of conventional surfactants. It has the characteristic of being large. Therefore, after the surfactant of the present invention is used in factories, homes, etc., the foam disappears quickly. Therefore, it can be used with confidence without the problem of environmental pollution caused by the use of conventional surfactants. Therefore, the surfactant of the present invention is expected to be widely used in the paper manufacturing industry, textile industry, etc.

Next, the present invention will be explained in detail by implementing IPIJ.

Example 1 Isobutylene oligomer (manufactured by Idemitsu Petrochemical ■; trade name: P-2Q28FL; mainly those with an average carbon number of 16) was supplied in an amount of 1.0 to a thin film sulfonation apparatus having a reaction tube with an inner diameter of 12 m and a length of 60 cm. Go/min film thickness [], 2
M, Av was removed from the film and allowed to flow down under conditions of a welding time of 1 minute. At the same time, twice the molar amount of SO gas diluted with nitrogen gas was introduced from the upper part of the reaction tube to carry out a sulfonation reaction. Here, the supply amount of S03 gas is 0.52 yzl/m
In, the original grade of nitrogen gas was set to 2 L/min.

The reaction product 3.21 thus obtained was neutralized with 1 equivalent or more of sodium hydroxide, and further heated to 110 °C.
I performed a saponification reaction between two poems. Next, unreacted oligomers and sulfonate salts were extracted and separated using f,n-hexane and a 50% aqueous solution of isopropanol. Furthermore, the alcohol aqueous solution layer was salted out with sodium carbonate, and the solvent was distilled off from the alcohol layer to remove 50% of the sodium sulfonate of butylene oligomer.
Obtained. The sulfonation rate of this reaction was 65%.

The sodium sulfonate of the butylene oligomer thus obtained has a water content of 0.1% or less and no unreacted oligomer.
．． It was a solid carving of less than 1%. The surfactant ability of this surfactant was measured. The results are shown in Table 1.

Comparative Examples 1 to 6 The surfactant properties of conventionally used sodium dodecylbenzenesulfonate (Comparative 9141), lauryl sulfate ester Cedar (Comparative Example 2), and tetradecene sulfonate (Ratio Example 6) were tested in the same manner as in Example 1. It was measured. The results are shown in Table 1.

Claims (1)

[Scope of Claims] +11 A surfactant whose main component is a tri- to pentamer-sulfonate of butylene. (2) The surfactant according to claim 1I11, wherein the butylene is n-butylene and/or imbutylene.