JPS6012337B2 - Metal soap manufacturing method - Google Patents

Description

[Detailed description of the invention] The present invention relates to a method for manufacturing metal soap.

More specifically, the present invention relates to an improved method for manufacturing metal soap by a melting process.

The double decomposition method and the melting method are generally known as methods for producing metal soap.

The double decomposition method is a method in which ordinary alkaline soap is first produced, then a metal salt solution is added to it, and the soap is converted into metal soap through double decomposition.

The disadvantages of this method are that the production is low despite the large scale of the equipment, that large amounts of water are required, and that wastewater treatment issues must be considered. Also, what is the melting method?
This is a method in which a fatty acid is heat-treated with a metal oxide or metal hydroxide at a high temperature to cause a direct reaction. According to this, the viscosity of the system in the middle of the reaction increases significantly, making it difficult to form a rope frame, and the product is lumpy, making it difficult to crush. Due to the high reaction temperature, the product becomes discolored and its quality deteriorates.
Furthermore, if 0K heat is added at this time, foaming will occur significantly, making reaction control difficult. An object of the present invention is to provide a method for manufacturing metal soap that eliminates the above-mentioned drawbacks.

That is, the object of the present invention is to provide a method for producing metal soap that can prevent thickening and foaming of the reaction system and produce a high-quality product that is free from coloration. The method for producing metallic soap of the present invention involves melting a higher fatty acid having 6 to 22 carbon atoms at a temperature 5 to 20°C higher than its melting point, and adding oxides of metal elements and/or hydroxides of metal elements to this. After uniformly dispersing the higher fatty acids, add water at a temperature of 5 to 55°C to
It is characterized in that it is added at a ratio of 0 mol and allowed to react. In the method for producing metallic soap of the present invention, the higher fatty acids having 6 to 22 carbon atoms used include, for example, saturated fatty acids such as capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, etc. Acids: Unsaturated fatty acids such as erucic acid, linoleic acid, linoleic acid, etc.
Alternatively, mixed acids of two or more of these acids may be used, but stearic acid is industrially most suitable.

In addition, the oxides and hydroxides of metal elements used in the present invention include zinc oxide, cadmium oxide, tin oxide, lead oxide, iron oxide, magnesium oxide, calcium oxide, barium oxide, zinc hydroxide, cadmium hydroxide, ~ Calcium hydroxide, tin hydroxide, barium hydroxide ``Magnesium hydroxide, lead hydroxide can be mentioned'' Also, as objects,
When attempting to obtain a metal soap containing two or more different types of metals, the required metal oxides or metal hydroxides may be mixed and used.

The above-mentioned fatty acids are melted at a temperature 5 to 2 points higher than the melting point, and the metal oxides and hydroxides are added thereto while the mixture is being melted and uniformly dispersed.

Then, 2.5 to 40 mol based on fatty acid, preferably 5
The reaction is carried out by adding water in an amount of ~20 moles to obtain a metal soap. If the temperature of the water added at this time is high, rapid foaming will occur upon addition, producing a bulk solidified soap, making it difficult to control the reaction. On the other hand, in the present invention, the temperature is 5 to 55°C, preferably 10 to 30°C.
It is characterized in that a large amount of water having a water temperature of qo is added to the fatty acid. In the present invention, foaming is significantly reduced, and the metal soap produced is in the form of fine particles or brittle particles that can be crushed very easily with small force, and has a good white color.

As described above, since the method of the present invention has a remarkable foaming suppressing effect, continuous supply of raw materials is possible, and reaction and
Drying and grinding can be done in a series of continuous steps.

Therefore, it can be said to be a highly productive and economical method suitable for eliminating dust pollution. Note that water remaining at the completion of the reaction can be removed by distillation and drying. The effect of the present invention is to provide a method for producing high-quality metal soap that prevents thickening and foaming of the reaction system and does not cause coloring. The following will be described in more detail with reference to Examples, but these are not intended to limit the scope of the present invention.

All parts in the middle part of the example are by weight. Example 1 Stearic acid (SV202, NV201, same below) 2
Charge 0 Ikarito into a reactor and heat to melt and adjust to 80°C.

After adding 22 parts of calcium oxide and uniformly dispersing it, 200 parts of water at 30°C is gradually added. At this time, slight foaming is observed. After the addition, heating was continued at 75-80°C for 10 minutes to complete the reaction. The produced metallic soap is dried to obtain a white fine granular product. The free fat content of the product is 1%. Example 2 20 parts of stearic acid are charged into a reactor and heated to melt and adjust to 80°C.

After adding 18.5 parts of magnesium oxide and uniformly dispersing it, 10 parts of 25 ml of water were gradually added. At this time, slight foaming is observed. 75-8 for 10 minutes after addition
Continue heating the lamp to 0qo to complete the reaction. The produced metallic soap is dried to obtain a white fine granular product. The free fatty acid content of the product is 0.5%. Example 3
- Charge 20 parts of stearic acid into a reactor, heat and melt to adjust to 75 qo.

After adding 27 parts of calcium hydroxide and uniformly dispersing it, 50 parts of water at 30°C is gradually added. At this time, slight foaming is observed. After the addition, heating was continued at 75-80 qO for 10 minutes to complete the reaction. The produced metallic soap is dried to obtain a white fine granular product. The free fatty acid content of the product is 1.3%. Example 4 20 tons of stearic acid was charged into a reactor, heated and melted to adjust the temperature to 80:00.

After adding 18.5 parts of zinc oxide and uniformly dispersing it, 13 parts of water at 50°C are gradually added. At this time, slight foaming is observed. After the addition, continue heating to 75-80°C for 10 minutes to complete the reaction. The produced metallic soap is dried to obtain a white fine granular product. The free fatty acid content of the product is 1.4%. Example 5 20% stearic acid was charged into a reactor and heated and melted to adjust to 70 qo.

After adding 7 parts of barium hydroxide and uniformly dispersing it, 10 parts of 50 qo of water were gradually added. At this time, slight foaming is observed. 75-80℃ for 1 female after addition
Continue heating the lamp to complete the reaction. The produced metallic soap is dried to obtain a white fine granular product. The free fatty acid content of the product is 1.3%. Example 6 20 parts of stearic acid was charged into a reactor, heated and melted to prepare 7 grates.

After adding 24 parts of calcium oxide and uniformly dispersing it, 77 parts of 1OO○ water was gradually added, and slight foaming was observed. 75-80 for 10 minutes after addition
Continue heating the lamp to complete the reaction. The produced metallic soap is dried to obtain a white fine granular product. The free fatty acid content of the product is 0.8%. Example 7 20 parts of stearic acid was charged into a reactor and heated to melt and adjust to 80 parts.

To this, 35 parts of magnesium oxide is added and uniformly dispersed, and then 35 parts of 500% water is gradually added. At this time, slight foaming is observed. After the addition, heating was continued for 10 minutes at 75-80°C to complete the reaction. The produced metallic soap is dried to obtain a white fine granular product. The free fatty acid content of the product is 0.8%. Comparative Example 1 20 parts of stearic acid was charged into a reactor, heated and melted, and adjusted to 80 qo.

After adding 24 parts of calcium oxide and uniformly dispersing it, 77 parts of 7,000 ml hot water was gradually added to it, and rapid foaming immediately occurred, the volume of which reached five times that of the original solution, and then solidified. After adding the hot water, continue heating the water for 10 minutes.
Terminate the reaction. The produced metallic soap is in the form of a hard lump, which is dried and ground into a product. The free fatty acid content of the product is 1.2%. Comparative Example 2 20 tons of stearic acid was charged into a reactor, heated and melted to adjust to 80 oo.

After adding 18.5 parts of magnesium oxide and uniformly dispersing it, 10 parts of 70% hot water were gradually added, and rapid foaming immediately occurred, the volume of which reached five times that of the original solution. It then solidifies. After adding hot water, heating was continued for 1 minute to complete the reaction. The produced metallic soap is in the form of a hard lump, which is dried and ground into a product. The free fatty acid content of the product is 1.3%. Comparative Example 3 20 parts of stearic acid is charged into a reactor and heated to melt and adjust to 95°C.

After adding 24 parts of calcium oxide and uniformly dispersing it, adding 13 parts of 1000 ml of cold water,
A block-shaped reactant is generated. This is dried and crushed to make a product. The free fatty acid content of the product is 10%. Comparative Example 4 20% stearic acid was charged into a reactor, heated and melted to adjust the temperature to 95:00.

Claims (1)

[Claims] 1. A higher fatty acid having 6 to 22 carbon atoms is melted at a temperature 5 to 20°C higher than its melting point, and zinc oxide, cadmium oxide, tin oxide, lead oxide, iron oxide, magnesium oxide, calcium oxide, barium oxide, and water are added to this. One or more metal oxides or metal hydroxides selected from the group consisting of zinc oxide, cadmium hydroxide, calcium hydroxide, tin hydroxide, barium hydroxide, magnesium hydroxide, and lead hydroxide are uniformly mixed. 1. A method for producing metal soap, which comprises dispersing the soap in water at a temperature of 5 to 55° C. and adding the fatty acid at a ratio of 2.5 to 40 mol to the fatty acid to cause a reaction.