JPH09253656A - Oil treatment agent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow mineral oil showing a liquid state at the normal temp. to gel at the normal temp. by using aluminum n-octanoate hydrate or aluminum 2-ethylhexanoate hydrate as an effective component. SOLUTION: Aluminum n-octanoate or aluminum 2-ethylhexanoate is produced, for example, by adding an aluminum salt to an aq. soln. of a sodium n-octanoate or sodium 2-ethylhexanoate (double decomposition method) and obtained only by filtering the reaction soln. When a proper amt. of aluminum n-octanoate hydrate or aluminum n-hexanoate hydrate is added not only to mineral oil such as gasoline or light oil in a container but also to water- containing oil, oil dispersed in water or a small amt. of oil floating on the surface of the water, oil can be easily gelled at the normal temp. without heating the oil to be easily removed by a net or the hand.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The invention belongs to the manufacturing fields of electricity, electronics, machinery, metals, automobiles, pharmaceuticals, inks, paints, agriculture, fisheries, foods, fibers, polymers, rubber, etc., and wastewater treatment and oil spill accidents in those factories. Provided are a mineral oil treatment agent and a method for removing mineral oil that can be used for pollution prevention such as treatment. Further, it can be used for prevention of danger such as leakage processing of fuel oil at gas stations and homes.

[0002]

2. Description of the Related Art Conventionally, gasoline, light oil,
Various mineral oils are used as petroleum distillation components such as kerosene and heavy oil, solvents for cleaning metals and machines, solvents for inks and paints, solvents for chemical reactions and the like. However, once mineral oil is spilled, the danger of flames and the pollution of rivers, lakes, oceans, and soil become serious problems, which greatly affects the living environment.

In order to solve these problems, various oil treatment agents such as adsorption type and gelling type have been developed. Typical examples include inorganic adsorbents (sand, silica, perlite, clay), organic natural and synthetic adsorbents (peat moss, kapok, cotton, pulp, etc., polypropylene non-woven fabric, foamed polyurethane, etc.), thickened gelation. Additive (12-
There are hydroxystearic acid, metallic soap, benzylidene sorbitol, amino acids), and self-swelling oil absorbing agents (t-butylstyrene / divinylbenzene copolymer, acrylic acid ester crosslinked polymer, polynorbornene, etc.).

These adsorbents, gelling additives and oil absorbing agents have their own advantages and disadvantages. Although an inorganic adsorbent is inexpensive, it has a small adsorption amount and is bulky, and it cannot be used because it sinks in a river or the like. Furthermore, it becomes difficult to dispose of the oil that has absorbed the oil. Although the organic natural and synthetic adsorbents have a high adsorption rate, they have a small oil retaining force and exude and leak due to pressure. Furthermore, it also has the drawback of absorbing water. The self-swelling oil absorbent has a high selective oil absorption performance only with oil, but has a low adsorption rate and is expensive. Therefore, its use cannot be used for leak treatment of heavy oil etc. because it can be recycled and used, or limited to special applications.

It has been said that the risk of fire cannot be ignored because the thickening gelling additive needs to be melted by heating and gelled. 12-Hydroxystearic acid, benzylidene sorbitol, and amino acids need to be gelled by heating, and fats and oils gel, but mineral oil does not gel. In particular, metal soaps have been used for decades as a gelling agent for varnishes of inks and paints, but it was thought that heat gelation was necessary (Gel: Sangyo Tosho p197.
~ 199).

Since the spilled oil and the like cannot be treated while being heated, the metallic soap was not used for treating the spilled oil and the like. Further, it was considered that it cannot be applied to water-containing oil, oil dispersed in water, or oil floating in a small amount in water. In other words, it was thought that gelling could not be performed with metallic soap in the presence of a large amount of water (property and application of metallic soap: Koshobo).

[0007]

DISCLOSURE OF THE INVENTION An object of the present invention is to treat waste water capable of gelating mineral oil which is liquid at room temperature at room temperature,
To provide an oil treatment agent useful for pollution prevention, fire prevention, etc.

[0008]

[Means for Solving the Problems] In order to achieve the above-mentioned object, the inventors of the present invention have conducted extensive studies and found that mineral oil can be gelated at room temperature by using a metallic soap containing a specific water content. The present invention was started and the present invention was completed. That is, the present invention is an oil treatment agent capable of gelling mineral oil containing n-aluminum octoate hydrate or 2-ethylhexanoate hydrate.

Not only when the mineral oil is in the container, but also when it is on the floor or concrete where the leaked or spilled oil does not permeate, it is in the state of oil containing water, dispersed oil in water, or oil floating in a small amount in water. When an appropriate amount of aluminum octoate hydrate or aluminum 2-ethylhexanoate hydrate is added, the oil easily gels at room temperature without heating.

When collecting the oil on the water that has flowed out to rivers, lakes, etc., if the oil layer is thick, it can be removed by sucking with a pump or scooping with a jade, but the oil layer is about 2 to 3 cm. After that, it will be difficult to pump only oil. If you try to force it, it will contain a large amount of water and the treatment efficiency will decrease. In addition, oil removal tanks and coagulating sedimentation methods have been used to remove oil in wastewater treatment facilities, but they are not fully satisfactory.

The mineral oil gelled by the water hydrate of aluminum n-octanoate or the water hydrate of aluminum 2-ethylhexanoate can be easily removed with a net or a hand because it floats on water. Unlike dried aluminum soap, n-aluminum octoate hydrate or aluminum 2-ethylhexanoate hydrate is easy to adapt to water, and therefore exhibits an effect even in the case of oil dispersed in a small amount in water. Furthermore, dried aluminum soap has a large scattering property, is difficult to handle, and is susceptible to static electricity.

It is dangerous to add dry aluminum n-octanoate or aluminum 2-ethylhexanoate to oils such as gasoline and toluene which are prone to ignition and electrostatic ignition. Since the n-aluminum octoate hydrate or the 2-ethylhexanoate hydrate contains less water, it is less likely to cause a flame than the dried one, and it has the advantage that the amount of evaporation is reduced by gelation. is there. n-Aluminum octoate hydrate or 2
-Aluminum ethylhexanoate hydrate absorbs only oil and gels while expelling its own water, so its volume is hardly changed, and it is not bulky like a polypropylene nonwoven fabric oil absorbent and does not expand greatly by absorbing oil.

The hydrated aluminum n-octanoate or the hydrated aluminum 2-ethylhexanoate is one which has been subjected to an ordinary method for producing aluminum soap, that is, a metathesis reaction (Japanese Patent Publication Nos. Sho 36-19125 and Sho 36-193).
79, Japanese Patent Publication No. 36-10476, Japanese Patent Publication No. 7-2571
No. 7, French Patent Fr1605242, etc.), and it is preferable that it is not dried, but it may be slightly dried to control the water content.

Aluminum n-octanoate or 2-
Aluminum ethylhexanoate is produced, for example, by adding an aluminum salt to an aqueous solution of sodium n-octanoate or sodium 2-ethylhexanoate (metathesis method), but the produced aluminum n-octanoate or aluminum 2-ethylhexanoate is used. Water content of 90% by weight or more depending on the degree of filtration.
20% by weight can be easily obtained.

As the aluminum n-octanoate or aluminum 2-ethylhexanoate, from the viewpoint of its gelling power, a disoap form represented by the formula Al (OH) (RCOO) ₂ is preferable. Even when sodium n-octanoate or sodium 2-ethylhexanoate and an aluminum salt are used in the composition in the proportions that form disoap, those containing 20% by weight or less of trisoap or monosoap are produced.

The production of disoap form may be carried out by a production method from aluminum alkyloside, that is, a method of reacting an acid with an aluminum alkoxide in an organic solvent, but this method requires extremely expensive starting materials. And
Not economic. Further, in order to change the composition ratio of disoap, monosoap and trisoap, the metathesis method and the manufacturing method from aluminum alkoxide may be combined.

The aluminum soap described in Japanese Patent Publication No. 36-19125 is dried at 100 ° C. Aluminum octylate described in JP-B-36-10476 is characterized by being dried at 100 ° C. and having a loss on drying at 105 ° C. of 3 to 8%. The one described in JP-B-7-25717 is also characterized by being dried at 50 ° C. or lower. Furthermore, French patent Fr1605242 is also dried at 50 ° C. or lower to 3
It is characterized by containing ~ 5% water.

That is, conventionally known aluminum soaps as gelling agents are used for inks and paints with a water content of 5% or less provided that they are all dried, and have a water content of 20 to 90%. The use as a mineral oil treating agent which gels with the contained aluminum n-octanoate or aluminum 2-ethylhexanoate has not been known. The n-aluminum octoate hydrate or aluminum 2-ethylhexanoate hydrate having a water content of 20 to 90%, preferably 60 to 80% has little scattering and is easy to handle.

The shape of hydrated aluminum n-octanoate or hydrated aluminum 2-ethylhexanoate is
Powders, granules, pellets, sheets, blocks, lumps, pastes and the like can be used, but not limited to these.

The mineral oil treating agents of the present invention comprising n-aluminum octoate hydrate or aluminum 2-ethylhexanoate hydrate may be used alone or as a mixture, but as long as they do not deviate from the present invention, they can be used. In addition, an appropriate amount of conventionally known aluminum soap such as aluminum stearate, aluminum laurate, aluminum behenate, etc. may be added. Moreover, you may use together with the said well-known gelling agent and oil absorption processing agent.

Mineral oils to which the present invention is applied include gasoline, light oil, kerosene, heavy oil, toluene, xylene, pentane, hexane, cyclohexane, isooctane, paraffin, isoparaffin, thinner, mineral terpene,
It is intended for hydrocarbon oils such as ligroin, petroleum ether, petroleum benzine, solvent No. 4, solvent No. 5, solvent No. 6, solvent No. 7, solvent oil, machine oil and spindle oil, but is not limited to these. Absent.

The amount of the n-aluminum octanoate hydrate or aluminum 2-ethylhexanoate hydrate added to the mineral oil varies depending on the type of the mineral oil, the gelation time, and the desired gel state, but is 100 parts by weight of the mineral oil. On the other hand, n-aluminum octanoate hydrate or aluminum 2-ethylhexanoate hydrate is added so that the amount of aluminum metal is in the range of 0.01 to 10 parts by weight, preferably 0.1 to 1 part by weight. Good to do,
It is not limited to these. The gelled oil is easy to handle, can be easily transported, and can be incinerated as it is.

[0023]

EXAMPLES The present invention will be described below in more detail with reference to examples, but the present invention is not limited to these examples.

Example 1 100 ml of the oil shown in Table 1 was placed in a 200 ml beaker, the temperature was adjusted to 20 ° C., 10 g of aluminum 2-ethylhexanoate hydrate (water content 67%) was added, and the mixture was slowly added with a glass rod. The mixture was stirred and the gelled state was observed. The results are shown in Table 1.

[0025]

[Table 1] Table 1 Gasoline: Complete gel within 3 minutes Kerosene: Complete gel within 3 minutes Light oil: Complete gel within 3 minutes Heavy oil: Complete gel within 10 minutes Toluene: Complete gel within 3 minutes Xylene: Complete gel within 3 minutes Mineral terpene: Complete gel within 3 minutes AF5 solvent: Complete gel within 5 minutes

Example 2 200 ml of water in a 500 ml beaker, oil 2 shown in Table 2
After adding 0 ml and adjusting the temperature to 20 ° C., 4 g of aluminum 2-ethylhexanoate hydrate (water content 67%) was added, and the mixture was slowly stirred with a glass rod, and after 1 minute, 5 minutes, 30
The state after 1 minute and after 1 minute was observed. Table 2 shows the results.

[0027]

[Table 2] Table 2 1 minute 5 minutes 30 minutes 1 hour Gasoline: △ ○ ◎ ☆ Kerosene: △ ○ ◎ ☆ ☆ Light oil: △ ○ ◎ ☆ Heavy oil: △ △ ○ ◎ Toluene: ○ ◎ ◎ ☆ Xylene: ○ ◎ ◎ ☆ Mineral terpen: ○ ○ ◎ ☆ AF5 solvent: △ ○ ◎ ☆ △ There is a change in fluidity ○ The whole is gelled paste ◎ Complete gelation ☆ Can be taken out with tweezers

Example 3 To a 200 ml graduated cylinder, 100 g of a mineral terpene was added to 10 g (about 16 ml) of hydrated aluminum 2-ethylhexanoate (water content: 67%), and gelled with stirring.
The temperature and volume during gelation were measured. The results are shown in Table 3.

[0029]

[Table 3] Table 3 Mixing 116ml 19.5 ° C 1 minute later 114ml 22.0 ° C 5 minutes later 105ml 24.0 ° C 15 minutes later 105ml 23.0 ° C 15 minutes or more, the gelation is strong, and the mixture is forcibly stirred. The volume increases because it encloses air.

Example 4 100 g of mineral terpene was charged into a 200 ml beaker, the temperature was adjusted to 20 ° C., and 2 to 20 g of aluminum 2-ethylhexanoate hydrate (water content: 67%) was added to observe the gelled state. The results are shown in Table 4.

[0031]

[Table 4] Table 4 Addition amount (Al amount / 100g oil) 1 minute 5 minutes 15 minutes 30 minutes 1 hour 2g (0.053g) --- △ ○ ○ 5g (0.132g) △ △ ○ ○ ◎ 10g (0 246g) ○ ○ ◎ ◎ ☆ 20g (0.528g) ○ ◎ ☆ ☆ ☆

Example 5 100 g of a mineral terpene, an aluminum 2-ethylhexanoate hydrate (water content 6) required for complete gelation within 5 minutes
The required amount was as follows. Table 5 shows the results.

[0033]

[Table 5] Table 5 (Al amount / 100g oil) 30% water product 4.3g (0.24g) 50% water product 6g (0.24g) 70% water product 10g (0.24g) 80% water product 15g (0.24g)

Example 6 100 ml of mineral turpentine was placed in a 200 ml beaker and 10 g of aluminum 2-ethylhexanoate hydrate (water content 67%) was added at each temperature shown in Table 6 to observe the gelled state. Table 6 shows the results.

[0035]

[Table 6] Table 6 1 minute 5 minutes 15 minutes 30 minutes 1 hour 7-8 ° C − − − △ ○ 20 to 21 ° C ○ ○ ◎ ◎ ☆ 38 to 40 ° C ○ ◎ ◎ ☆ ☆

Although the examples of the hydrated aluminum 2-ethylhexanoate have been described above, the same tendency is shown when aluminum n-octanoate is used.

[0037]

INDUSTRIAL APPLICABILITY According to the present invention, mineral oil can be promptly gelled at room temperature with a treating agent containing an n-octanoic acid hydrate or an aluminum 2-ethylhexanoate hydrate as an active ingredient. It is cheaper than conventional ones and has excellent gelling ability, and can be effectively used for wastewater treatment, pollution prevention, hazardous material treatment, etc.

Claims (4)

[Claims] 1. A mineral oil treating agent comprising a hydrous n-octanoate or a hydrous 2-ethylhexanoate as an active ingredient. 2. An n-aluminum octoate hydrate or an aluminum 2-ethylhexanoate hydrate is represented by the formula:
Al as a main component Jisopu represented by (OH) (RCOO) _2, Torisopu of formula _{Al (RCOO) 3, Al (} OH) 2 (RCOO) aluminum containing 0-20% each monosoap represented by The mineral oil treatment agent according to claim 1, which is a water-containing soap. (However, RCOO in the above formula represents an n-octanoic acid residue or a 2-ethylhexanoic acid residue.). 3. The mineral oil treating agent according to claim 1, wherein the water content of the n-aluminum octanoate hydrate or the aluminum 2-ethylhexanoate hydrate is 20 to 90%. 4. A mineral oil is a hydrocarbon oil which is liquid at room temperature, and an n-aluminum octoate hydrate or 2 corresponding to 0.01 to 10 parts by weight of aluminum metal is added to 100 parts by weight of mineral oil. -A method for removing mineral oil, which comprises adding a hydrous substance of aluminum ethylhexanoate and gelating the mineral oil for removal.