JPH06116545A - Coagulating agent - Google Patents

Abstract

PURPOSE:To provide the coagulating agent capable of rapidly adsorbing and coagulating an animal or vegetable oil at room temperature and of safely and efficiently treating waste oils, and excellent in an animal or vegetable oil-holding force. CONSTITUTION:The coagulating agent comprises the powder of a block copolymer comprising polystyrene blocks and polybutadiene blocks, the polystyrene blocks and the polybutadiene blocks being alternately and linearly arranged each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coagulant, and more particularly to a coagulant for adsorbing and coagulating waste oil of animal and vegetable oil produced from homes, restaurants and various factories.

[0002]

2. Description of the Related Art Edible oils such as frying oil in general households and commercial animal and vegetable oils used in restaurants and food factories need to be disposed of as waste oil after being deteriorated in quality. Similarly, it is necessary to dispose of waste oil of plants and animals that has been used for lubricating oil applications in general manufacturing factories and machine factories. Conventionally, as the disposal method of these,
A method is known in which an absorbent material such as a synthetic fiber, a natural fiber or pulp is adsorbed and discarded.

[0003]

However, although these disposal methods certainly adsorb animal and vegetable oils, they do not have sufficient holding power, and the adsorbed animal and vegetable oils exert physical force on the absorbent. As a result, there is a drawback that the material leaks from the absorbent.

On the other hand, in recent years, as a method for treating frying waste oil and the like, as disclosed in, for example, JP-A-55-106298, 12-hydroxystearic acid is added to waste oil, heated and dissolved, and then cooled and solidified. A method has been proposed. According to this method, the solid substance obtained is certainly strong and easy to process after cooling. However, this method has a disadvantage that practical performance cannot be found unless the temperature of the waste oil is 70 ° C to 80 ° C or higher, and there is a problem in terms of safety and disaster prevention from treatment at high temperature, which is inefficient. Is. Moreover, it has a defect that the oil seeps out after a few days and the holding power of the oil becomes weak.

Further, a method of adding a coagulant to these used animal and vegetable oils and discarding them is known. Examples of the coagulant include dibenzylidene sorbitol as disclosed in JP-A-61-19681 and JP-A-61-19682, and N-acyl amino acid amide, N-acyl amidic acid ester or N-acyl. BACKGROUND ART Surfactants such as amino acid-based gelling agents composed of derivatives such as amino acid amine salts are known.

However, in the method using this coagulant, the strength of the gelled solid matter is weak and it is in the form of paste or pudding, and considerable energy and time are required to collect and discard these. , Inefficient. The gelation referred to in the present application means that fluidity is lost.

Further, in the method using this coagulant, the fact that an organic solvent must be used together when gelling can cause environmental pollution or a secondary disaster which has become a problem in recent years.

[0008] Therefore, the main object of the present invention is to provide a coagulant capable of quickly adsorbing and coagulating animal and vegetable oils at room temperature and having excellent animal and vegetable oil retaining ability and capable of safely and efficiently treating waste oil. Is to provide.

[0009]

The coagulant according to the present invention is a coagulant made of powder of a block copolymer comprising a polystyrene block and a polybutadiene block, the block copolymer being a polystyrene block and a polybutadiene block. It is a coagulant having a structure in which and are alternately arranged in a straight line.

That is, the block copolymer used in the coagulant according to the present invention is a thermoplastic elastomer having a structure in which polystyrene blocks and polybutadiene blocks are alternately arranged in a straight line, and has the following formula (1). ，
It has a general formula such as (2) or (3).

[0011]

[Chemical 1]

Where A is a polystyrene block,
B is a polybutadiene block. n is an integer and is not particularly limited, but is usually 1 to 10, and preferably 2 to 6. It should be noted that n is substantially 10 or less because the manufacturing process becomes too complicated when trying to increase n. Further, in a block copolymer having a structure in which a polystyrene block and a polybutadiene block are arranged in a side chain or radial state, it is necessary to adsorb animal and vegetable oils at room temperature and it takes a long time to coagulate the oil. Does not meet the purpose.

The method for producing the block copolymer used in the present invention is not particularly limited as long as it is a method capable of arranging polystyrene blocks and polybutadiene blocks alternately in a linear form. For example, a known method such as a reaction between polymers or a living polymerization method or a sequential monomer addition method can be applied.

The block copolymer used in the present invention preferably has an average molecular weight of about 20,000 to about 500,000, and more preferably one that softens at around 100 ° C.

The ratio of styrene to butadiene in the block copolymer is preferably styrene, preferably 10 to
60% by weight is good.

Further, the block copolymer used in the present invention is mechanically pulverized using, for example, a turbo mill. The diameter of the powder is preferably 2 mm or less, more preferably 1 mm or less. This is because if the powder diameter of the block copolymer is too large, the surface area of the block copolymer becomes smaller and the swelling speed of the block copolymer with animal and vegetable oils slows down, so that the animal and vegetable oils are adsorbed and coagulated. This is because it takes a long time to become inefficient.

The amount of the coagulant according to the present invention added to animal and vegetable oils cannot be specified because it varies depending on the nature of the animal and vegetable oils, but the smaller the viscosity of the animal and vegetable oils, the smaller the amount, and the larger the viscosity of the animal and vegetable oils, the larger. It tends to be needed. Normally, 5 per 100 parts by weight of animal and vegetable oil
If 30 to 30 parts by weight is added, animal and vegetable oils can be quickly adsorbed and solidified. The coagulation referred to in this application is
The state in which the oil hardly seeps out even if some physical force is applied.

The coagulant according to the present invention is sufficiently practical at room temperature, but when the animal or vegetable oil is heated to a fluid state in advance and then added, the animal or vegetable oil is adsorbed and coagulated. The action can be further enhanced.

The coagulant may be a fine powder of an anti-blocking agent such as wax, hardened oil, magnesium carbonate, calcium carbonate, silicon dioxide, etc. for the purpose of preventing blocking between block copolymer powders before use. And / or a powdered monoglyceride, a surface active agent such as polyethylene glycol may be blended in a small amount as an antistatic agent or a wetting agent.

Further, an absorbent having a large surface area such as synthetic fiber, natural fiber, paper, pulp, starch and protein may be blended, and these may be used together.

Although the coagulant according to the present invention may be used by directly adding it to the target animal or vegetable oil, it may be used in a bag made of a hydrophobic non-woven fabric, for example, a non-woven fabric of synthetic resin fiber such as polyolefin or polyester. You may use it in the filled form. The bag can be used in any shape such as a mat shape, a sugar stick shape, a cylindrical shape, and a spherical shape according to the application.

[0022]

Industrial Applicability According to the present invention, a coagulant capable of quickly adsorbing and solidifying waste oil of animal and vegetable oil at room temperature and having excellent retention of waste oil of animal and vegetable oil can be obtained. That is, the coagulant according to the present invention includes, for example, vegetable oils such as soybean oil, cottonseed oil, corn oil, safflower oil and sesame oil, and beef tallow, lard and fish oil in a fluid state (heated and liquid). Effective for animal oil.

Further, the coagulant according to the present invention has an excellent property of adsorbing and coagulating animal and vegetable oil in a short time at room temperature, for example, within 1 minute to 1 hour, and
Excellent retention of animal and vegetable oils. Therefore, after adsorbing animal and vegetable oils, there is no separation of the oil, and there is almost no exudation of the oil by physical force. Moreover, once solidified, the solid material becomes stronger with the passage of time, so that it is extremely easy to handle when treating waste oil and the like.

The above and other objects, features and advantages of the present invention will become more apparent from the detailed description of the embodiments below.

[0025]

【Example】

Example 1 Three types of block copolymers shown in Table 1 were prepared by polymerizing styrene and butadiene using a living polymerization method. This block copolymer has a structure in which polystyrene blocks and polybutadiene blocks are alternately arranged in a straight line. Next, this block copolymer was pulverized using a turbo mill to obtain 18 mesh (opening diameter 1
mm) to obtain Samples (1) to (3). These were added to 100 parts by weight of used frying oil (soybean oil) at room temperature and the coagulated state was observed. The results are also shown in Table 1. In the table, A represents a polystyrene block and B represents a polybutadiene block. Further, the coagulation in the table means a state in which almost no oil exudes even when pressed with a finger. The following table is also the same.

[0026]

[Table 1]

Example 2 Four types of block copolymers shown in Table 2 were prepared by polymerizing styrene and butadiene using a sequential monomer addition method. This block copolymer has a structure in which polystyrene blocks and polybutadiene blocks are alternately arranged in a straight line. Next, this block copolymer was freeze-pulverized to 32 mesh (opening diameter 0.5 mm).
The sample (4) to the sample (7) were obtained by passing through a No. 4 sieve. These were added to 100 parts by weight of fish oil (sardine oil) at room temperature and the solidified state was observed. The results are also shown in Table 2.

[0028]

[Table 2]

Example 3 Sample (1) was added to 100 parts by weight of various animal and vegetable oils, and the coagulated state was observed. The results are shown in Table 3.

[0030]

[Table 3]

As is clear from the results shown in Table 1, Table 2 and Table 3, Samples (1) to (7) can quickly adsorb various animal and vegetable oils at room temperature and solidify them. Recognize. Moreover, these were also excellent in the retention of animal and vegetable oils.

Comparative Example 1 12-Hydroxystearic acid was pulverized using a power mill and passed through an 18 mesh (opening diameter 1 mm) sieve to obtain a sample (8). Used frying oil (soybean oil)
It was added to 100 parts by weight and the solidified state was observed. Similarly, a polypropylene fiber non-woven fabric [Sample (9)] was used. The results are shown in Table 4.

[0033]

[Table 4]

Comparative Example 2 Styrene and butadiene were polymerized by a polymer initiator method using a coupling agent to prepare a block copolymer having a side chain and a structure arranged in a radial state. Next, this block copolymer was pulverized using a turbo mill and passed through an 18-mesh (opening diameter 1 mm) sieve,
Samples (10) and (11) were obtained. It was added to 100 parts by weight of used frying oil (soybean oil) and the coagulated state was observed.
The results are shown in Table 5.

[0035]

[Table 5]

As is clear from the results shown in Tables 4 and 5, Samples (8) to (11) are not satisfactory as waste oil treating agents.

Example 4 In order to examine the effects of the antiblocking agent and antistatic agent on the coagulant, sample (6) was blended with 0.5% by weight of silicon dioxide to obtain sample (12). Also, sample (6)
2.5% by weight of fine powder of stearic acid monoglyceride
Compounding was performed to obtain a sample (13). Furthermore, in order to examine the effect of other waste oil absorbents on the coagulant, sample (6) was used to absorb oil-absorbing starch (bulk density 0.12 g / cm ³ , 18 mesh passing product, manufactured by Matsutani Chemical Co., Ltd., trade name: Pine flow)
Was mixed in an amount of 20% by weight to obtain a sample (14). Add these to 100 parts by weight of fish oil (sardine oil) at room temperature,
The coagulation state was observed. The results are shown in Table 6.

[0038]

[Table 6]

From the results shown in Table 6, it can be seen that the addition of the antiblocking agent, antistatic agent, and other absorbent having a large surface area has no effect.

Claims (1)

[Claims] 1. A coagulant comprising a powder of a block copolymer comprising a polystyrene block and a polybutadiene block, wherein the block copolymer has a structure in which polystyrene blocks and polybutadiene blocks are alternately arranged in a linear form. Is a coagulant.