JPH10195232A - Continuous production for carrying out recycling of expanded polystyrene by precipitation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To continuously carry out recycle of expanded polystyrene at ordinary temperatures by precipitating the expanded polystyrene into a mixture of pinene with a petroleum-based light gas oil or light fuel oil to form mass of polystyrene. SOLUTION: (A) Colorless and transparent pine essential oil (terpene pine oil) obtained by steam distillation or vacuum distillation of raw turpentine consisting essentially of pinene is mixed with (B) 15-25% petroleum-based light gas oil such as benzole, white spindle oil, white liquid paraffin, colorless mineral spirit or white oil or light fuel oil to afford a base oil of recycle. Expanded polystyrene, as necessary, formed into fine pieces is precipitated into a base oil and the oil is agitated as necessary, the mixture is sometimes agitated and the precipitate is taken out as polystyrene having gum-like or ball-like mass and the above operation for precipitating other expanded polystyrene is repeated. On other hand, the taken out polystyrene mass is spread into about 5mm width and applied by hot air and slightly left base oil is removed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION In the present invention, colorless and transparent pine essential oil (tarpentine oil) obtained by steam distillation or vacuum distillation of raw pine resin containing pinene as a main component is used for recycling styrene foam. This does not include limonene.

[0002]

2. Description of the Related Art Conventionally, recycling of polystyrene foam by the dissolving method has not been carried out frequently because the solvent is more expensive than recycled polystyrene, and the expensive solvent must be recovered. 5% to 10% in the process of heating and cooling to the product to reach the boiling point
The degree of reduction is likely to be expected, and the heating of each pot is oxidatively polymerized to distill, and the deterioration of the solvent cannot be avoided. Once oxidized, the deterioration proceeds automatically. In particular, most of the organic hydrocarbons that react with iron and are effective will be colored like ink and become unusable in six months just by being placed in an iron drum. In particular, heating distillation at a pot temperature is a prohibited matter. Therefore, unless the oil is heated and the product is not distilled at room temperature, the profit cannot be established. Therefore, the appearance of the precipitation method of the present invention is expected. In the present invention, a wooden container is prepared at the bottom using a stainless steel container, an aluminum container, a duralumin container or an enameled container, and is installed so that the product can be taken out.

[0003]

SUMMARY OF THE INVENTION The present invention relates to an oil and fat which does not dissolve styrofoam at all in combination with pine essential oil, such as a petroleum-based highly refined light oil or light heavy fraction at a ratio of 15% to 25% to pine essential oil. By mixing, this is used as the base oil for recycling, and the raw material is continuously used at room temperature without using fire, and dissolved and settled at the bottom of the base oil to form a gum-like mass. It is a manufacturing method based on a new method that enables exquisite continuous production, which is to say that it takes out.

[0004]

According to the method of the present invention, the product is precipitated as polystyrene at the bottom of the base oil without distillation at a pot temperature to obtain a gum-like or rice cake-like mass to obtain the product polystyrene. Such a phenomenon is that the liquid melted at the limit of the solvency of pinene does not melt the styrofoam, but the pine essential oil is melted by mixing fats and oils such as petroleum light oil and light heavy oil. The polystyrene particles which precipitate downward due to the difference in specific gravity, and which have been broken down into fine particles in the base oil and whose melting criticality has been broken, are collected below to form a lump. So only a few percent between particles
However, since only the base oil in the product is mixed, the product becomes a gum-like mass. Since there is no heat distillation, there is no deterioration of the oil, and the product is taken out at a time of about 2 to 3 hours at a time and the continuous production is possible only by replenishing the oil occasionally. Compared to the other, base oil losses are significantly smaller. To give an example, it is easy to see that vegetable oil frying oil is oxidatively polymerized by heat and deteriorates after 15 uses. Styrofoam needs to be broken into pieces and stirred occasionally with a T-shaped rod to make contact with the oil. This speeds up the precipitation. The oil that promotes precipitation is an oil that cannot dissolve styrene foam, and it is more convenient to select an oil that has a boiling point as close as possible to 150 ° C. of pine essential oil. Heavy oils and vegetable oils with a very high boiling point tend to remain in the product despite being expensive, so avoid them as much as possible. Choose from colorless, white oil, etc., with a boiling point of 80
It is convenient to use a small amount of oil in the polystyrene of the product such as {-150} by applying hot air or the like to the finished product. In the present invention, since the fire is not used during charging, the life of the oil is long and the oil can be continuously used only by replenishing the shortage occasionally, and there is almost no contamination and coloring of the oil. Polystyrene of the product taken out of the container is taken out as a gum or freshly made rice cake, and it does not stick to hands etc. even if it is extended on a plate, it can be extended with hands or rolls like clay You can also cut with.
The slight residual oil in the product is completed with hot air. It is spread on a stainless steel platen for about 5 wears and then blasted with hot air to cool the hot air and recover even a small amount of oil. The product is cut into small pieces with a cutter and recycled. Even 100% remanufactured products are the same as new ones and do not lose quality when mixed with new ones.

[0005]

[Table 1]

Table 1 shows the qualities of the precipitated products. Since the boiling point is higher for a heavy distillate, it is necessary to pay attention to the subsequent treatment.
In this method, since the loss is small, it is advantageous that the oil that promotes precipitation has a low boiling point even if it is slightly high.

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Claims (1)

[Claims] 1. A production method wherein styrene foam is precipitated on an oil bottom with oils and fats, especially petroleum-based light oil or light and heavy oil, in which pinene is used in combination, and recycling is continuously performed at room temperature.