JPH09165582A - Asphalt extraction solvent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the subject solvent containing turpentine oil and/or a turpentine oil derivative as main components, safe to human body, free from problem of environmental disruption, having performance comparable to that of conventional asphalt extraction solvent and useful for asphalt extraction test. SOLUTION: The objective solvent contains turpentine oil and/or a turpentine oil derivative as main components. The turpentine oil is present mainly in pine tree, separated by the fractionation as a component having a boiling point of 150-180 deg.C and preferably e.g. 1-methyl-4-propinylcyclohexene [1-methyl-4-(1- methylethynyl)cyclohexene, etc.] existing in the peel of orange.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to asphalt pavement work for roads, etc., and then asphalt is extracted from aggregates, fillers, etc. using a Soxhlet extractor, for the purpose of quality control, and the accuracy of its mixing is checked. It relates to the composition of the extraction solvent, which has been tested for solvent extraction, including confirmation.

[0002]

2. Description of the Related Art Conventionally, ethane trichloride and trichloroethane have been used as solvents for solvent extraction of asphalt products. However, since these solvents are substances that deplete the ozone layer, adversely affect the human body, and pollute groundwater and rivers, they become a social pollution problem. It is prohibited to use. It is natural to prohibit the use as a problem of groundwater, river pollution, global warming, and destruction of nature, but it is a serious problem in the industry that the above solvents cannot be used, and the development of alternative solvents has been earnestly desired. . As the asphalt extraction solvent, various kinds such as petroleum-based solvent and alcohol-based solvent can be considered, but none of them was sufficient when judged from the viewpoint of environment, hygiene, performance, and productivity.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an asphalt extraction solvent which is safe to the human body and free from the risk of natural destruction, and which is equivalent in performance to conventional asphalt extraction solvents.

[0004]

In order to solve the above problems, the present invention solves the above problems by containing turpentine oil and / or turpentine oil derivative as a main component as an extraction solvent for an asphalt extraction test. The present invention has been completed and the present invention has been completed.

Here, turpentine oil is an essential oil mainly contained in pine trees, and is produced in various parts of the world including Japan. This essential oil has a boiling point of 150 ° C to 18 ° C.
Fractionation into various fractions is carried out by rectification at 0 ° C.

If the fractionated fraction is 150 ° C. or lower, the flammability becomes low and the danger becomes great. At 180 ° C or higher, the asphalt solubility is poor and the performance is not good as an extraction solvent for the asphalt extraction test.

[0007] One of turpentine oils, 1-methyl-4-isopropynylcyclohexene, is contained in citrus peel. 1-Methyl-4-isopropenylcyclohexene is widely used as a tableware solvent, a bath agent, a fragrance, a medical agent, and a food flavor, and its safety has been confirmed.

At what is obtained at these boiling point levels,
From natural to gum turpentine oil, 1-methyl-4-isopropynylcyclohexene, 2,6,6-trimethylbicyclo (3.1.1) hept-2-ene, 6,6-dimethyl-2-methylenebicyclo (3.1 1) Heptane, 1,
3,3-trimethyl-2-oxabicyclo (2.2.
2) Octane, 3,7-dimethyl-1,3,6-octatriene, 2-methyl-5- (1-methylethyl)-
1,3-cyclohexadiene, 2,6-dimethyl-1,
5,7-octatriene, 1-methyl-4-isopropylcyclohexane, α-4-trimethyl-3-cyclohexene-1-methanol, 2-methyl-5- (1-methylethyl) bicyclo (3.1.0) Hexan-2-ol, 1-methyl-4- (1-methylethyl) benzene,
There are 3,7,7-trimethylbicyclo (4.1.0) hept-3-ene and other derivatives.

Although the same effect can be obtained from any of these compounds, the above-mentioned 1-methyl-4-isopropynylcyclohexene (1-methyl-4- (1-methylethynyl) cyclohexene) is particularly notable. Excellent in odor, boiling point, dissolving power, production amount, pollution-free, extraction power, price and safety.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail with reference to Examples of an asphalt extraction test (Soxhlet method) generally performed in the asphalt industry. It is not limited to these examples unless it exceeds. Test conditions Mixture type: dense-grained Ascon (13) AS amount 6.0
The results of the 0% asphalt extraction test are as shown in Table 1, and the performance of Sample A (1-methyl-4-isopropynylcyclohexene) was equal to or higher than that of Comparative Sample B (tricholethane).

[0011]

[Table 1]

[0012]

[Effect] Since the asphalt extraction solvent of the present invention is obtained from nature or has its derivative as a main component, the environmental damage and the influence on the human body are extremely small as compared with the conventional petroleum-based ones and are safe. Is. In addition, the extraction performance is the same as that of conventional petroleum-based ones, and will be useful as a substitute for conventional products in the future.

Claims (1)

[Claims] 1. An asphalt extraction solvent comprising turpentine oil and / or a turpentine oil derivative as a main component as an extraction solvent for an asphalt extraction test.