JPS5811477B2 - How to bleach wool wax - Google Patents

Description

[Detailed Description of the Invention] The present invention involves the decolorization and purification of crude wool wax collected from wool.
This method uses light.

Due to its unique properties, wool wax has been widely used as a base material for pharmaceutical ointments and cosmetic creams, lotions, shampoos, and conditioners since ancient times, and its quality is regulated in the Japanese Pharmacopoeia and the Cosmetic Raw Materials Standards. There is.

The most important characteristic of wool wax is that it resembles the human cortex, and when applied to the skin, it makes the skin smooth, supple, and provides just the right amount of moisture.

Moreover, when used as a raw material for cosmetics, in addition to the above-mentioned effects, it has excellent properties such as imparting gloss, improving humidity resistance, and improving spreadability.

Also, since it has excellent emulsion stability, especially near body temperature, it is widely used as an emulsifier in cosmetics to improve oil retention.

Despite having such ideal properties as a base material for cosmetics, wool wax is disliked due to its hue and odor, which have become serious problems, and there is no improvement in these issues. This is extremely significant.

When using crude wool wax, it naturally requires a refining process like other natural fats and oils, but it is not enough to simply perform acid washing, alkali washing, activated clay treatment, and deodorization operations as with normal fats and oils. No bleaching effect can be obtained.

Therefore, in the case of wool wax, it is further decolored using a bleaching agent.

A common bleaching agent for wool wax is NaClO2゜H2O2
However, using such bleaching agents in high concentrations often causes other quality problems.

In particular, excessive decolorization with bleaching agents has a negative effect on the peroxide value and acid value of wool wax.

In addition, when refining wool wax, activated clay treatment or adsorbent treatment using activated carbon may be applied, but with activated clay,
Its decolorization rate does not reach the desired level, and although activated carbon has a high decolorization rate, it causes a significant loss of solvent and wool wax, making it uneconomical.

The present invention improves the drawbacks of these various decolorization techniques and provides a completely new method for decolorizing wool wax that can be used industrially.

Specifically, the present invention is a method in which wool wax alone or after being dissolved in a solvent is blown with air or oxygen and irradiated with artificial light.

According to the method of the present invention, the recovery rate is 10% in a short processing time.
A decolorized wool wax with a low odor of 0% is obtained.

Since ancient times, it has been known that wood wax and beeswax can be bleached by leaving them in the sun, but in the case of wool wax, even if you apply these ancient techniques, not only will it not be possible to obtain a sufficient bleaching effect, but the acid value and excess It could not be used industrially because it often caused significant quality deterioration such as oxide value.

On the other hand, when using illegal methods, products with high productivity and less coloring can be obtained without significantly increasing the acid value or peroxide value.

Moreover, even if it is combined with conventionally known acid cleaning, alkaline cleaning, bleaching agents, and adsorbents, its effectiveness will not be affected at all, so it can be combined with these conventional techniques to achieve even more advanced decolorization. Suitable for obtaining wool wax.

Therefore, the wool wax obtained by combining illegal methods is almost white in color, and it is an epoch-making product in that it can be easily obtained at a level particularly desirable for cosmetics.

Next, a more detailed explanation of the method of carrying out the present invention is as follows: 1) The wool wax to be irradiated with light may be melted by applying heat to itself without using a solvent, but the efficiency of light irradiation is increased. Considering ease of handling, it is desirable to dissolve it in a solvent and use it as a solution.

The concentration of the solution may be so long as it does not significantly obstruct the passage of light to the light source, but it is usually used at a concentration of 5 to 30%.

It is more effective to add stirring while irradiating the light.

It is necessary to inhale air or oxygen into this irradiated liquid beforehand or during irradiation.

If an inert atmosphere such as nitrogen or a reducing atmosphere using hydrogen supply is used, the desired decolorizing effect cannot be obtained.

Furthermore, there is no significant difference in the decolorization effect depending on the light irradiation time.

When using a solvent, any solvent may be selected as long as it does not react with the wool wax or cause a decomposition reaction when exposed to the irradiated light.

2) The light irradiation time for the wool wax is appropriately selected depending on the purpose.

Even if it is irradiated for an unnecessarily long time, the decolorization rate will not change and it will only induce other quality deterioration, which is not a good idea.

For example, when 400 ml of a 20% n-hexane solution is internally irradiated with a high-pressure mercury lamp (100 W), decolorization is sufficient in about 1 hour.

3) The light source used for decolorizing the wool wax should preferably have a wavelength range of 300 to 450 nm.

Although a light source having a large amount of so-called ultraviolet light having a wavelength lower than 300 nm has the effect of decolorizing wool wax, it is not a good idea because it has the disadvantage of promoting the production of peroxides.

On the other hand, a light source containing a large amount of wavelengths longer than 450 nm has the drawbacks of low decolorization efficiency and large power loss, and is not economically advisable.

A high-pressure mercury lamp contains a large amount of light in the wavelength range of 300 to 450 nm, has high light energy, and has excellent decolorization efficiency, and is a light source suitable for implementing the present invention as an industrial means.

4) The raw wool wax to be bleached has a Gardner chromaticity of 1.
Even in the case of markedly colored products No. 7 to 18 and commercially available pharmacopoeia products No. 7 to 8, both are further decolorized by irradiation with light.

The method of the present invention can be applied regardless of the degree of coloring of the raw material.

This shows that high quality wool wax with significantly less coloring can be obtained easily and at a high yield by combining the method with the conventional decolorization method as described above.

The present invention will now be described in detail with reference to Examples, which are not intended to limit the present invention and may be modified within the scope of not changing the nature of the present invention.

In the examples, the weight percentage is indicated.

The method for measuring Gardner chromaticity is based on the standard oil and fat analysis test method (2.3°1.3-71) established by the Japan Oil Chemists' Association.

The peroxide value (hereinafter abbreviated as P, 0.V) was measured according to the above-mentioned (2°4.12-71).

Example 1 After dissolving 30 parts of crude wool wax in 60 parts of methyl ethyl ketone, 0.3 parts of phosphoric acid (purity 89%) and a predetermined amount of sodium chlorite (purity 25%) shown in Table 1 were added. Aqueous solution containing 40
After stirring at 70°C for 1 hour and washing, the liquid was separated by standing, and the methyl ethyl ketone solution was taken out.
To this was added 40 parts of an aqueous solution containing 0.72 parts of caustic soda and a predetermined amount of hydrogen peroxide (purity: 35) shown in Table 1, and the oil layer was washed at 70°C for 3 hours with stirring. was taken out and the solvent was distilled off to obtain wool wax.

On the other hand, 400 m of a solution of 20 parts of crude wool wax dissolved in 80 parts of n-hexane was bubbled with air at a rate of 0.41 per minute, and then irradiated with a high-pressure mercury lamp (100 W) at air temperature for 1 hour, and then the solvent was removed. Wool wax was obtained by distillation.

Gardner chromaticity and peroxide value (
Table 1 shows a comparison of the measurement results of p, o, v,).

However, the Gardner chromaticity of the crude wool wax used as a sample is 12.
, p, o, v, was 20.

Example 2 20 parts of commercially available wool wax with a Gardner chromaticity of 8 was mixed with n-hexane 7
The prescribed adsorbent was added to a solution of 80 parts in the proportions shown in Table 2, and the adsorption treatment was carried out while stirring at room temperature for a day and night. The solvent, n-hexane, was then distilled off. The Gardner color and recovery rate are compared with those obtained by internally irradiating 400 ml of the same wool wax n-hexane solution with a high-pressure mercury lamp (IOOW) for 1 hour at room temperature while blowing air at a rate of 0.41 per minute. -2.

Example 3 Under the conditions of various solvent atmospheres shown in Table 3, wool wax with a Gardner chromaticity of 14 was made into a solution of 5 parts in n-hexane, and 200 ml of this solution was mixed with air or air at a rate of 0.21 per minute. Table 3 shows the results of the Gardner chromaticity of the wool fat obtained by internally irradiating it with a high-pressure mercury lamp (100 W) for 1 hour while blowing nitrogen, and then distilling off n-hexane.

As is clear from these results, it can be seen that the decolorizing effect by light irradiation is effective in the method of the present invention under an oxygen atmosphere.

Example 4 A high-pressure mercury lamp (100 W) was heated at room temperature for 1 hour while blowing air at a rate of 0.21 per minute into 200 ml of an s% n-hexane solution of crude wool wax having various Gardner chromaticities shown in Table 4. Table 4 shows the Gardner chromaticity of the wool wax obtained by distilling off n-hexane after internal irradiation.

As is clear from the results, the effect of decolorization by light irradiation is significant regardless of the degree of coloration of the raw material.

Example 5 200ml of n-hexane solutions of various concentrations of wool wax with Gardner chromaticity 8 as shown in Table 5 were heated with a high pressure mercury lamp (100W) at room temperature for 1 hour while blowing air at a rate of 0.21/min. Table 5 shows the Gardner chromaticity results of the wool wax obtained by distilling off n-hexane after internal irradiation.

As is clear from the results, there is no difference in the degree of decolorization depending on the concentration of light irradiation, so the method of the present invention is a technology that can be fully applied industrially.

Example 6 Three types of light sources were selected as shown in Table 6, and the low-pressure mercury lamp was inserted into an optical quartz jacketed container, the high-pressure mercury lamp was inserted into a Pyrex glass jacketed container, and the incandescent halogen lamp was inserted into a glass jacketed container. Then, cooling water was passed through the jacket, and 100 ml of a 10% n-hexane solution of wool wax into which air had been blown at a rate of 0.41 per minute was internally irradiated at room temperature for 30 minutes.

The irradiation time was determined as shown in Table 6 so that the amount of light exposure was constant.

Table 7 shows the Gardner chromaticity and p, o, v of the wool wax obtained by distilling off n-hexane after irradiation with light.

However, the Gardner chromaticity of unirradiated wool wax is 7. P, 0. V
, was 27.

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Claims (1)

[Claims] 1 When decolorizing wool wax, wool wax alone or after dissolving it in a solvent, blowing air or oxygen,
A method for decolorizing wool wax, which comprises irradiating artificial light with a wavelength of ~450 nm.