JPH07265696A - Oil absorbent and its production - Google Patents

Abstract

PURPOSE:To obtain an oil absorbent which is fast in oil penetration, is short in treatment time, is less odorous and has high quality by adhering zeolite by a binder on the surfaces of the fiber components of dry granular paper making sludge and drying the zeolite, thereby forming the oil absorbent having an aggregated structure partially adhered with the zeolite in a dotty form. CONSTITUTION:The binder agent 2 (e.g. polyethylene glycol) in a container is heated. This binder agent 2 and the dry granular paper making sludge 1 are put into an agitating machine, where both are mixed and agitated to adhere the binder agent 2 on the surfaces of the sludge 1. The zeolite 3 is then put into the agitating machine and further, the binder agent and the sludge are mixed and agitated to the aggregated form; thereafter, the mixture is air dried. At this time, the compounding ratio of the dry granular paper making sludge, the zeolite and the binder agent is specified to 7 to 9:9 to 11:1 to 2. Consequently, the oil absorbent which is fast in oil penetration, is short in treatment time, is less odorous and has the high quality is obtd.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-quality oil absorbing material in which zeolite is adhered to a dried / granular papermaking sludge with a binder agent to form an aggregate, and its production.

[0002]

2. Description of the Related Art It is applicable to the treatment of both edible oil and machine oil waste oil, which consists of drying mud-like papermaking sludge generated from paper mills into granules and adhering a mineral called zeolite to it. There is an oil absorber shown in FIG. 4 in which oil fixed by heat or pressure does not re-fluidize, and an oil absorber shown in FIG. 5 in which this is put in a container (see Japanese Patent Application No. 5-190779). ). In FIG. 5, 5
Is a container and 6 is a conventional oil absorbent. As shown in FIG. 1, the process for producing this oil absorbent is as follows: (a) dried / granular papermaking sludge and (b) zeolite are mixed and stirred only in (c) stirring mixer. It is a powdery oil absorber. For this reason, since it is powdery and has no gaps, it is necessary to put the oil absorbing material in a flat container as shown in FIG.

[0003]

In the oil absorbent according to the conventional manufacturing method as described above, it takes a long time for the waste oil to permeate, and the handleability is poor, and there is a bad odor peculiar to the dry / granular papermaking sludge, which is hygienic. There were some drawbacks such as not very favorable. The present invention was proposed in order to improve the above-mentioned drawbacks, and its purpose is to shorten the processing time in the oil absorbent,
Another object of the present invention is to provide a high-quality oil absorbing material which is formed into aggregates by eliminating the bad odor peculiar to dried and granular papermaking sludge, and a method therefor.

[0004]

In order to achieve the above object, the present invention provides an oil having a granular structure in which zeolite is partially covered in a patchy manner with a binder on the surface of the fiber component of a dry / granular papermaking sludge. The absorbent material is a feature of the invention. Further, the present invention is a step of heating the binder agent in the container, and then putting the binder agent and dried and granular papermaking sludge in a stirrer, mixing and stirring, and adhering the binder agent to the surface of the sludge. And then, put the zeolite in the stirrer, further mixing and stirring, to granulate, and then a step of naturally drying, characterized in that the method for producing an oil absorbent is characterized by the invention. is there.

[0005]

When the oil absorbent of the present invention absorbs oil, the dry and granular paper sludge first absorbs oil. By mixing this dry and granular papermaking sludge with the oil absorbent, the oil is roughly absorbed (even if the oil cannot be completely absorbed, 50 to 8
It can absorb about 0% of oil) and can easily spread the oil. In the final stage the oil is adsorbed by the zeolite and its fluidity is fixed. Since zeolite has a molecular crystal lattice structure, the chain structure of oil is caught and fixed in the lattice. The oil thus fixed does not reflow due to heat or pressure. The zeolite used may be naturally occurring, synthetic or artificial. In addition, as shown in FIG. 1, the oil absorbent of the present invention has zeolite 3 attached to the dried / granular papermaking sludge in which 70% or more of the surface of the fiber component of the dried / granular papermaking sludge 1 is covered with the binder agent 2. When air-dried, the dried and granular papermaking sludge and zeolite solidify and become one, and the surface of the dried and granular papermaking sludge is manufactured with aggregates by partially covering the zeolite in spots. . It is desirable to use polyethylene glycol as the binder agent used at this time. This is because there are water-soluble polymer agents such as polyvinyl alcohol in the binder agent, but when it is mixed with dry / granular papermaking sludge, it
Granular papermaking sludge contains water of water-soluble polymer agent and spends a lot of drying time, and the dry and granular papermaking sludge may rot to give off a specific rotten odor, which is a sanitary problem. is there.

However, the molecular weight is large, for example, the molecular weight is 2.
000 or more polyethylene glycol is solid at room temperature and has a thermoreversible property that turns into a liquid when heated at about 60 ° C. For example, it is liquefied at a high temperature of 120 to 150 ° C and dried / granular papermaking. By mixing with sludge, it is possible to remove the water contained in the dried / granular papermaking sludge. Further, when naturally cooled, polyethylene glycol is solidified and has the effect of trapping the odor of dried and granular papermaking sludge. Further, since polyethylene glycol has adhesiveness (cohesiveness) when liquefied, it becomes easy to aggregate dry / granular papermaking sludge and zeolite, and an aggregated product can be easily produced. When the produced oil absorbing material is put into a container and waste oil is poured into the container, the oil permeates into the gaps of the aggregated product, and the oil can be absorbed evenly. As shown in Fig. 1 (b), the dried / granular papermaking sludge has a structure in which the fibrous material to which the binder agent is attached spreads in a mesh shape, and the binder agent and zeolite are attached to the fibrous material. Even
Oil is roughly absorbed due to capillary action between fibers.

Therefore, the absorbing effect of the oil absorbing material does not change regardless of the temperature of the oil. Even with the vertical container as shown in FIG. 2, the processing time of the waste oil is significantly shortened as compared with the conventional manufacturing method. In FIG. 2, 4 is the oil absorbent of the present invention, and 5 is a container. Therefore, by using a polymer agent such as polyethylene glycol as a binder agent, it is possible to shorten the processing time in the oil absorbent material and to eliminate the malodor peculiar to the dried / granular papermaking sludge, which is the object of the present invention.

[0008]

EXAMPLES Next, the present invention will be described in more detail by way of examples. FIG. 3 is a flow chart showing an example of a method for producing the oil absorbent of the present invention. As shown in the figure,
(A) Dry / granular papermaking sludge and (b) solid polyethylene glycol are placed in an enamel container, (c) a liquid obtained by melting polyethylene glycol into a high-temperature liquid using a heater, and (d) a stirring mixer. Mix well with and stir,
(E) Polyethylene glycol is attached to the dried and granular papermaking sludge. Then, (f) zeolite is placed in a container and further mixed and stirred to form granules, and (g) naturally dried to obtain (h) a high-quality oil absorbent of the present invention.

In this example, the following procedure was conducted as an experiment for producing a high-quality oil absorbent. First, an experiment was carried out to determine the compounding ratio of dry / granular papermaking sludge to zeolite and polyethylene glycol.
As a result of kneading with some mixing ratios changed, it became clear that the mixing ratio of the dry / granular papermaking sludge and the zeolite polyethylene glycol is preferably about 7 to 9: 9 to 11 to 1 to 2 by weight. If the proportion of zeolite is larger than this, the zeolite cannot sufficiently adhere to the dried / granular papermaking sludge, so when the oil absorbent is stored in the container, there is little clearance for oil to penetrate and there is a long processing time. is necessary. On the contrary, it has been found that if the ratio is reduced, the ability to absorb oil becomes poor, and it becomes impossible to achieve a predetermined purpose as an oil absorbent. Further, the basis of the mixing ratio of the binder agent is that the binder agent is attached to the papermaking sludge, but if the amount is less than this, the zeolite cannot be attached sufficiently, so that no aggregate is formed. Also, if it is more than this,
This is because the binder agent has also entered the gaps between the fibers, and the capillary action between the fibers to absorb oil cannot be expected. The mixing ratio varies depending on the dryness of the papermaking sludge and the degree of the granular state, but in this case, it may be changed within the range not departing from the gist of the invention.

Next, the following specific manufacturing experiments were conducted. Polyethylene glycol [Poly-etlyl
en Glycol molecular weight # 6000 (PEG)] 2k
g in an enameled container and use a heater to heat it to about 150 ° C
Liquefied at a high temperature with a dry and granular papermaking sludge 1
6 kg was put into a stirring mixer and stirred well. After the high temperature liquid polyethylene glycol and the dried / granular papermaking sludge were well blended, 20 kg of zeolite was added to produce granular granules. The mixing and stirring time in the mixer is about 5 minutes,
It is necessary to complete mixing and stirring before the high-temperature liquid polyethylene glycol is cooled and becomes solid. Because, if it becomes solid, zeolite will not adhere well to dry / granular papermaking sludge and it will not be possible to manufacture it into agglomerates. Also, completely remove the water contained in the dry / granular papermaking sludge. Because you can't. After the completion of mixing and stirring, the oil absorbing material manufactured in a granular shape was taken out from the mixer and naturally dried at room temperature of 20 ° C. to manufacture a high quality oil absorbing material. The state of adhesion of polyethylene glycol to the fiber components of the dried / granular papermaking sludge produced by this method was examined. Polyethylene glycol was colored with a red pigment, and the aggregated oil absorbing material produced in the same manner as above was observed with a microscope at 100 times, and the coloring area of the dried / granular papermaking sludge to the fiber component was determined. It was measured. The result was as shown in FIG. 1, and it was confirmed that 70% or more of the surface of the fiber content of the dried / granular papermaking sludge was covered with the binder agent.

Table 1 shows a comparison of the processing time at 1 kg for the conventional oil absorbent and the high-quality oil absorbent produced as described above. At the processing time shown in Table 1, the amount of waste oil is 600
It takes about 32 minutes to process ml with a conventional oil absorbent, but it takes about 8 minutes with a high-quality oil absorbent.
It was confirmed that it could be processed in the time. Further, Table 2 shows the results of the survey on how to feel the odor. A survey of randomly selected n = 23 people showed that 21 (91%) said that they felt a bad odor or strongly felt in the conventional oil absorbent before use. It was confirmed that there were 13 people (57%) who felt that it was slightly felt with a quality oil absorbent material, and 10 people (43%) who did not feel it at all, and there was little odor. As for the odor after use, all people felt only the odor of the absorbed waste oil, and did not smell the dry / granular papermaking sludge at all. As a result, it is possible to solve the problem of the processing time of the oil absorbent, which is the object of the present invention, and the problem of the malodor peculiar to the dried / granular papermaking sludge.

[0012]

As described above, according to the present invention, since the oil absorbent manufactured in this manner is manufactured in a granular shape, the gap is large and the oil permeates quickly, so that the processing time is shortened. effective. For this reason, it is not always necessary to put in a flat container, and a container with good handleability can be freely selected. Further, since the dried / granular papermaking sludge is covered with the binder agent, it has less odor and is superior to the conventional one in terms of hygiene. However, the quality is extremely excellent, high quality, easy to manufacture, and capable of withstanding long-term storage. Furthermore, the oil-absorbing material of the present invention, which has already absorbed oil, forms a dumpling and can be recycled as a high-calorie solid fuel. (The absorbent applied to cooking oil is
Can be recycled as organic fertilizer. Further, the papermaking sludge, which is an industrial waste, can be effectively used, the waste can be treated by the waste, and the excellent utility is exhibited from the viewpoint of economical and global environmental conservation. The effect of the present invention can be further enhanced by using a fly ash discharged from a thermal power plant or the like and a zeolite synthesized by incineration of papermaking sludge. In other words, it is highly economical from the standpoint of resource reuse.

[Brief description of drawings]

FIG. 1 shows an oil absorbent of the present invention, (a) is a schematic diagram,
(B) is an enlarged view.

FIG. 2 is a sectional view of a vertical oil absorber.

FIG. 3 is a flowchart showing a method for producing the oil absorbent of the present invention.

FIG. 4 is a schematic view of an oil absorbing material.

FIG. 5 is a sectional view of an oil absorber.

FIG. 6 is a flowchart showing a manufacturing process of an oil absorbent.

[Explanation of symbols]

 1 Paper Making Sludge 2 Binder Agent 3 Zeolite 4 Oil Absorbent of the Present Invention 5 Container

Front page continuation (72) Inventor Kyobayashi Kyobayashi 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (72) Inventor Junichi Shirakawa 5-8 Akihabara, Taito-ku, Tokyo Airec Giken Co., Ltd. In the company

Claims (4)

[Claims] 1. An oil absorbent having a granular structure in which zeolite is partially covered in a patchy manner with a binder agent on the surface of the fiber components of dried and granular papermaking sludge. 2. A step of heating the binder agent in the container,
Then, the binder agent and dried and granular papermaking sludge are put into a stirrer, mixed and stirred, and the step of adhering the binder agent to the surface of the sludge, and then zeolite is put into the stirrer, and further mixed and stirred. A method for producing an oil absorbent, comprising a step of forming aggregates and then a step of naturally drying. 3. The method for producing an oil absorbent according to claim 2, wherein any one of polyethylene glycol, propylene glycol and polyvinyl alcohol is used as the binder agent. 4. The compounding ratio of dry / granular papermaking sludge, zeolite and binder agent is 7 to 9: 9 to 11 to 1 to 2.
The method for producing an oil absorbent according to claim 2, wherein