JPH05138044A - Productiohn of lils and fats decomposing film - Google Patents

Abstract

PURPOSE:To produce an oils and fats decomposing film decomposing and purifying the oil contamination of a cooking apparatus at low temp. within a short time. CONSTITUTION:Coating material containing oxide of either one of manganese, iron, cobalt and copper or composite oxide of them as an oils and fats decomposing catalyst and containing metal phosphate or metal silicate as a binder is prepared and applied to the surface of a heated base material and cured to obtain an oils and fats decomposing film.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a film for decomposing oils and fats for purifying oil stains on cookers and the like.

[0002]

2. Description of the Related Art In a conventional manufacturing method, as shown in FIG. 6, a paint containing a catalyst and a binder is prepared, the prepared paint is applied to the surface of a substrate, and then the paint is cured by heating. .. Then, as shown in FIG. 7, the method for curing the paint is as follows. The base material coated with the paint is put into a baking oven and the temperature is sequentially raised (A) and kept at a constant temperature (B) to cure, and then the temperature is gradually increased. It was lowered (C).

[0003]

However, when salad oil was dropped on the coating film having a thickness of about 100 μm produced by the conventional method and a decomposition and purification test was conducted in an electric oven, it took several hours at 400 ° C. Without it, it will not be completely decomposed. Even if the binder is a hollow frit,
It is the same even if the catalyst is replaced. Lower than 400 ° C,
In a short time, the oxidation reaction does not proceed sufficiently and a tar-like residue remains.

There are several causes for this, the first is that the supply of oxygen necessary for the reaction is small, and the second is that the surface of the catalyst is covered with the binder and the surface area of the catalyst is apparently small. Etc.

It is an object of the present invention to solve the above-mentioned conventional problems and to provide a method for producing a decomposed film of oils and fats which decomposes and purifies oil stains at a low temperature in a short time.

[0006]

In order to achieve the above object, the method for producing a film for decomposing oils and fats according to the present invention comprises, as a catalyst for decomposing oils and fats, one or more selected from the group consisting of manganese, iron, cobalt and copper. A paint containing the oxide or complex oxide of 1) and a metal phosphate or a metal silicate as a binder is prepared, and the paint is applied to the surface of a heated substrate and cured.

[0007]

According to the present invention, since the coating material is applied while the base material is heated by the above-mentioned constitution, the pore diameter and the porosity are large due to the bumping of water which is the solvent of the coating material, and the surface shape is also uneven. A film is produced and a large amount of oxygen necessary for the oxidation reaction is supplied.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a process diagram of the manufacturing method of this embodiment. As shown in the figure, first, a paint is prepared. In this example, a metal phosphate [Sumiceram P-450 manufactured by Asahi Kagaku Kogyo Co., Ltd.] was used as a binder, and a composite oxide (Fe containing manganese, iron, copper was used as a fat and oil decomposition catalyst.
₂ O ₃ .Mn ₂ O ₃ .CuO) was mixed to prepare a coating material. After that, stainless steel plate (SUS43
A substrate consisting of 0, dimensions: 0.5 t × 100 w × 100 lmm) was heated to 200 ° C. in an electric oven, taken out, and the coating was applied immediately. Then, it was cured in an electric oven heated to 300 ° C. for 30 minutes and then cooled to produce a fat and oil decomposition film. The heating and curing method of this embodiment is as shown in FIG. 2, and is different from the conventional method shown in FIG. 7 in that the base material coated with the coating material is placed in a baking oven and the temperature is sequentially raised. There is no point.

According to the manufacturing method of this embodiment, evaporation of water starts from the moment when the coating material adheres to the substrate, the pore size and the porosity are large, and the surface shape is a film having a lot of irregularities. Pore size is a few
A film having a wide distribution of 0 μm to several 100 μm can be obtained.
The base material temperature is an important factor that determines the properties of the coating film.
0-500 degreeC is desirable. If it is less than 200 ° C, the pore size, porosity and surface irregularities do not become so large, and if it exceeds 500 ° C, it becomes difficult for the paint to wet the surface of the substrate, which is not preferable.

Further, according to the manufacturing method of the present embodiment, since the substrate temperature is high, it is possible to increase the amount of adhesion per application number of times, and it is possible to form a coating having a larger film thickness in a shorter time than the conventional manufacturing method. Can be manufactured. As the oil and fat decomposition film has a larger film thickness, the amount of purification treatment increases. As shown in FIG. 3, the cross-section of the oil and fat decomposition film produced by this example shows a complex oxide (Fe ₂
O ₃ · Mn ₂ O ₃ · CuO) as a catalyst, a metal phosphate as a binder 3, a closed hole 4 and an opening 5 as a coating film.

According to the manufacturing method of this embodiment, the ratio of the openings 5 can be increased as compared with the conventional manufacturing method.

Next, the purification rates of the salad oils of this example and the conventional example were compared. The purification rate was 10 in the atmosphere after dropping 5 drops of salad oil on the film with a drop of about 25 mg per drop.
The weight change was measured while raising the temperature at ° C / min to obtain the purification rate. The result is shown in FIG. As is clear from the figure,
In the conventional example, 500 ℃ to completely decompose the salad oil.
Although it was necessary to raise the temperature to near, 330 ° C. is sufficient in this embodiment.

A comparison of the absorption time of 100 mg of salad oil is as shown in Table 1, and the film according to this example has a large porosity, and therefore the absorption time is extremely short. Therefore, the amount of purification treatment increases.

[0015]

[Table 1]

FIG. 5 shows the results of measuring the time-dependent change in the weight residual ratio at various oxygen concentrations at 300 ° C. by dropping salad oil on the coating film according to this example. The higher the oxygen concentration, the shorter the weight residual ratio. Will be lower. From this, it is considered that in the oil and fat decomposition film, the purifying ability becomes higher as the porosity is increased and the oxygen concentration is increased.

In the examples, the metal phosphate was explained as the binder, but the same effect can be obtained by using a metal silicate instead.

As the catalyst, manganese of the embodiment,
Complex oxide of iron and copper (Fe ₂ O ₃ · Mn ₂ O ₃ · Cu
The same effect can be obtained by using one or more oxides or composite oxides selected from the group of manganese, iron, cobalt and copper instead of O).

[0019]

EFFECTS OF THE INVENTION As is clear from the above description, according to the method for producing a fat and oil decomposition coating of the present invention, a coating having a larger pore size and porosity and a more irregular surface shape can be produced. Oxygen required for the reaction is supplied in a large amount, and oils and fats can be decomposed at low temperature in a short time.

[Brief description of drawings]

FIG. 1 is a process chart of an embodiment of the present invention.

FIG. 2 is a diagram showing curing conditions as well.

FIG. 3 is a sectional view of the same oil and fat decomposition film

[Figure 4] Similarly, a characteristic diagram of the purification rate

FIG. 5 is a characteristic diagram of weight residual ratio

FIG. 6 is a process diagram of a conventional manufacturing method.

FIG. 7 is a diagram showing curing conditions similarly.

Claims (1)

[Claims] 1. An oil or fat decomposition catalyst containing one or more oxides or complex oxides selected from the group consisting of manganese, iron, cobalt and copper, and a metal phosphate or metal silicate as a binder. A method for producing a decomposed film of fats and oils, which comprises preparing a coating material to be contained, applying the coating material to the surface of a heated substrate, and curing the coating material.