JPS6044968B2 - Solidifying agent composition in organic medium - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a solidifying agent composition in an organic medium containing 12-hydroxystearic acid as a solidifying agent component.

It is often desired to solidify an organic medium that is liquid at room temperature. Since such organic media are highly fluid,
When a container containing it breaks or falls over, it spills out and spreads over a wide area, making it extremely difficult to recover. If the spilled organic medium is a flammable medium, such as fuel oil, fires may occur due to spontaneous combustion. If the organic medium is solidified, there is no risk of the organic medium leaking out, and it is possible to prevent a fire from occurring due to the spillage of fuel oil. Furthermore, organic media solidification treatment technology solidifies the organic media of oil that is accidentally spilled at sea, on water, on land, in facilities, etc., thereby preventing its dispersion and facilitating recovery. Validly applied. It can also be applied to the purpose of solidifying waste oil such as used tempura oil, impure fuel oil, etc., which is discharged from ordinary households, and making it easier to handle and recover. Can be done. Conventionally, it has been known that 12-hydroxystearic acid has the ability to solidify an organic medium, but a method has been proposed in which the compound is added to an organic medium, dissolved by heating, and then cooled and solidified. (Bull, Ch.
em, Soc, Japan, 94293422 (196
9)).

However, in this known method, it is necessary to heat the entire organic medium to be solidified to a fairly high temperature, and it takes time to cool and solidify the solution at a high temperature. It cannot be said to be a practical method from the viewpoint of safety measures during heating and operation, as it requires additional equipment. It is especially applicable to application fields where it is inconvenient to heat the organic medium to be solidified, such as when solidifying and storing a large amount of organic medium, or when solidifying waste oil or oil spilled onto the sea. Can not do it. The purpose of the present invention is to solidify the organic medium without heating it at all.
The object of the present invention is to provide a 12-hydroxystearic acid-containing solidifying agent composition suitable for providing a uniform and strong solidified product.

The present inventor discovered that the solubility of 12-hydroxystearic acid in organic solvents largely depends on temperature, and that 12-hydroxystearic acid
By preparing a highly concentrated solution of hydroxystearic acid and adding it to the organic medium to be solidified, it is possible to solidify it without heating the organic medium to be solidified, in a short time, and with special equipment. We focused on the fact that it can be solidified without the need for.

When applying this method, the most important thing is the selection of the solvent.
It is essential to be able to prepare a 2-hydroxystearic acid solution and to use a solvent that gives a homogeneous and firm solidification so that the added solvent does not inhibit solidification.

As a result of various searches for solvents that meet these requirements, the present inventor found that 12-hydroxystearic acid was
It is preferable to use an organic solvent that can dissolve up to 7% by weight, in which 12-hydroxystearic acid is dissolved at a high concentration by heating,
The solid or semi-solid composition obtained by subsequent cooling can be redissolved at a relatively low temperature (e.g. 30 to 60°C),
They discovered that when this was heated to form a solution and mixed with an appropriate amount of an organic solvent to be solidified, a uniform hard solidified product was formed, and the present invention was completed. That is, the present invention provides (a) 12-hydroxystearic acid and (b) 12-
A composition consisting of a single or mixed organic solvent capable of dissolving 20 to 70% by weight of hydroxystearic acid at 50 ° C. The composition was heated until it became a homogeneous solution, and then cooled to room temperature. A solidifying agent composition in an organic medium characterized in that 12-hydroxystearic acid is present in an amount sufficient to sometimes form a solid or semi-solid.

The solidifying agent composition of the present invention can be used to form a liquid at room temperature. When solidifying the organic medium to be used, the solidifying agent composition is heated to form a solution and then added and mixed without heating the organic medium to be solidified.

If necessary, the solidifying agent composition of the present invention can be heated once, turned into a solution, and then cooled (and converted into a solid or semi-solid), so that it can be stored as a liquid until it is used. The solvent used to prepare the solidifying agent composition of the present invention is capable of dissolving 12-hydroxystearic acid in an amount of 20 to 7% by weight at 50°C. However, if we further divide this based on the solubility of 12-hydroxystearic acid at room temperature, there are two types: poor solvents that can dissolve 1% by weight or less at room temperature, and good solvents that can dissolve 10 to 6% by weight at room temperature. It can be roughly divided into two types.

The former poor solvent is a monohydric alcohol with 4 or more carbon atoms (
For example, n-butanol, isobutanol, tert-butanol, n-pentanol, n-hexanol, n-
octanol, 2-ethylhexanol, oleyl alcohol, etc.), polyhydric alcohols (e.g. propylene glycol, 1,3-butanediol, 1,4-butanediol, etc.), cellosolves (e.g. methyl cellosolve, ethyl cellofulve, isopropyl cellosolve) , butyl cellosolve, etc.), ethers (e.g. dioxane, glycol monomethyl ether, diethylene glycol monoethyl ether, ethylene glycol diethyl ether, etc.)
, ketones (e.g. acetone, methyl isobutyl ketone, etc.), hydrocarbons (e.g. hexane, benzene, toluene, kerosene, boron, etc.), halogenated fatty acid hydrocarbons (e.g. chloroform, carbon tetrachloride, etc.), Fatty acids with 4 or more carbon atoms (e.g., butyric acid, oleic acid, etc.), organic acids or esters of fatty acids (e.g., ethyl acetate, ethyl orthoformate, etc.), phthalate esters, trimethyl phosphate, tricresyl phosphate, or two or more of these. Examples include a mixed solvent of. Good solvents for the latter include lower alcohols with 3 or less carbon atoms (e.g., methanol, ethanol, propanol, etc.), lower fatty acids (e.g., acetic acid, propionic acid), liquid amides (e.g., formamide, dimethylformamide, N-methyl pyrrolidone, etc.), triethyl phosphate, tributyl phosphate, etc. In addition, 12-hydroxystearic acid was added at 50 C.
When a solidifying agent composition consisting of an organic solvent (e.g., glycerin, diacetin, polyethylene glycol, acetonitrile, etc.) and 12-hydroxystearic acid, which exhibits a solubility of less than % saliva volume, is blended in a solution state with an organic medium, non-uniformity occurs. Gives only partially solidified material.

However, such a poor solvent, which is unsuitable when used alone, is mixed with a good solution such as a lower alcohol as mentioned above and heated at 50℃ for 1 hour.
It can be used similarly by forming a mixed solvent that can dissolve 20 to 7 weight percent of 2-hydroxystearic acid. The blending ratio of 12-hydroxystearic acid in the solidifying agent composition of the present invention is such that the solidifying agent composition is
Amount to give a homogeneous solution at a relatively low temperature of 0 to 60°C, and then to give a solid or semi-solid after cooling it to room temperature, i.e.,
There is no particular limitation as long as the amount exceeds the solubility at room temperature.
This varies depending on the type of solvent used, but can be easily set experimentally. Generally, among the two types of solvents mentioned above, the blending ratio of 12-hydroxystearic acid is preferably 10 to 5% by volume when used in combination with a poor solvent, and 20% by volume when used in combination with a good solvent. A range of 7% to 7% is preferred. Further, when a mixed solvent of a good solvent and a poor solvent is used as a solvent for the solidifying agent, the solidifying time can be arbitrarily adjusted by changing the mixing ratio of both. Organic media that can be solidified according to the present invention include 12-
Any material may be used as long as it solidifies when mixed with hydroxystearic acid, heated and dissolved, and then cooled, such as mineral oils such as heavy oil, light oil, kerosene, and gasoline, and machinery oils such as sewing machine oil, spindle oil, and turbine oil. Preferred examples include oil, animal and vegetable oils such as soybean oil, rapeseed oil, and whale oil, and poor solvents in solidifying agent compositions.

The organic medium to be solidified may also be used as a solvent, and the solvent of the solidifying agent is appropriately selected from those having compatibility with the organic medium to be solidified.

For example, when applied to oil spilled at sea, on water, on land, in facilities, etc., if the same oil as the spilled oil is used as a solidifying agent solvent, it is easy to regenerate the recovered oil. In addition, when waste cooking oil such as tempura oil that has deteriorated in quality is solidified and reused as soap, it is preferable to use liquid fatty acids as a solvent. The solidifying agent composition of the present invention is heated to, for example, 50°C to form a solution, and added to the organic medium to be solidified in an amount of 0.5% by weight or more, preferably about 1 to 5% by weight in terms of 12-hydroxystearic acid. By adding and mixing so that the strength is 30y/C in a short time
A uniform solidified product of le or more can be obtained.

Hereinafter, this will be explained in detail using examples. Example 1 12-Hydroxystearic acid was added to the solvent shown in the table below.
The solidifying agent composition was prepared by adding the solidifying agent composition in a proportion of 0 to 4% by rutting, dissolving it by heating, and then cooling it.

Claims (1)

[Claims] 1(a) 12-hydroxystearic acid and (b) 12-
A composition consisting of a single or mixed organic solvent capable of dissolving 20 to 70% by weight of hydroxystearic acid at 50 ° C. The composition was heated until it became a homogeneous solution, and then cooled to room temperature. A solidifying agent composition in an organic medium, characterized in that 12-hydroxystearic acid is present in an amount sufficient to sometimes form a solid or semi-solid product.