JPH05125370A - Gasoline composition - Google Patents

Abstract

PURPOSE:To obtain a gasoline composition, containing a vinylcyclohexene and/or a tetrahydroindene, having a high octane number and calorific value without increasing aromatic components and useful as a fuel for automobiles, other internal combustion engines, etc. CONSTITUTION:A gasoline composition having a high octane number is prepared by adding a vinylcyclohexene and/or a tetrahydroindene to gasoline as a fuel for internal combustion engines, especially for automobiles. In the process, the objective gasoline composition is obtained by using a naphtha fraction, a cracked gasoline obtained by a catalytic cracking method, hydrocracking method, etc., a reformed gasoline prepared by the catalytic cracking method, etc., a polymerized gasoline obtained by polymerizing an olefin, an alkylate, etc., prepared by adding a lower olefin to a hydrocarbon such as isobutane as a blending material employed as the gasoline and adding an optional amount of the vinylcyclohexene such as 4-vinyl-1-cyclohexene and/or tetrahydroindene such as 3a,4,7,7a-tetrahydroindene thereto.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gasoline composition, and more particularly to a gasoline composition which is particularly useful as a fuel for automobiles and other internal combustion engines and has a high octane number and a calorific value.

[0002]

2. Description of the Related Art High octane number and high calorific value are desired for gasoline for internal combustion engines, especially for automobiles. Conventionally, gasoline with a high octane number has been produced by blending tetraethyl lead, but now blending is prohibited due to pollution problems caused by lead.

Generally, by adjusting the refining process,
It is known that a fairly high octane number gasoline can be obtained, and various proposals have been made, but there is a limit to such adjustment, and further, the basic principle of the adjustment is that the aromatic component is mainly increased. Therefore, similar to the pollution problem caused by lead, there is a drawback that pollution occurs due to release of an aromatic compound into the atmosphere. Further, in recent years, blending of gasoline such as methanol and methyl tertiary butyl ether, which are effective in reducing exhaust gas pollution, has been proposed.
The proposal is effective in improving the octane number of gasoline,
There is a drawback that the calorific value of gasoline decreases.

Also, regarding the octane number of various gasoline materials, it was reported from American ASTM in the 1950s (API Res
Only the earch Project 45) has been issued. The AS
The TM report is extremely extensive, accurate, and valuable, but since it is only the measurement value report for each compound under one compounding condition, it is not possible to know the change in octane number behavior due to the compounding. is there.

[0005]

An object of the present invention is to provide a gasoline composition having a high octane number and a high calorific value.

[0006]

According to the present invention, there is provided a gasoline composition characterized by containing vinylcyclohexene and / or tetrahydroindene.

The present invention will be described in more detail below.

The gasoline composition of the present invention contains vinylcyclohexene and / or tetrahydroindene as an essential component.

In the vinyl cyclohexene, the bonding position of the vinyl group may be any position on the vinyl cyclohexene ring, but 4-vinyl-1-cyclohexene or the like can be preferably used.

In the above-mentioned tetrahydroindene, the position of the double bond is arbitrary, but preferably, 3a, 4,7,7a-tetrahydroindene represented by the following structural formula 1 can be mentioned most preferably.

[0011]

[Chemical 1]

In the gasoline composition of the present invention, the content of the vinylcyclohexene and / or tetrahydroindene is arbitrary and can be appropriately selected depending on its use. For example, in the case of gasoline for automobile racing, it is preferably 2 to 100% by volume based on the total amount of the gasoline composition. Practically, it is preferably 50% by volume or less, particularly 2 to 30% by volume, and more preferably 5 to 20% by volume based on the total amount of the gasoline composition. It should be noted that the hydrocarbon fraction normally used as a gasoline base material does not substantially contain vinylcyclohexene or tetrahydroindene.

The gasoline composition of the present invention can be prepared by appropriately blending a blending material used for ordinary gasoline except when 100% of vinylcyclohexene and / or tetrahydroindene is used. Examples of the blending material include naphtha fraction, cracked gasoline obtained by catalytic cracking method / hydrocracking method, reformed gasoline obtained by catalytic reforming method, polymerized gasoline obtained by polymerization of olefin, isobutane, etc. Examples thereof include alkylate, isomerate, de-n-paraffin oil obtained by adding (alkylating) a lower olefin to hydrocarbon, or a fraction of these specific ranges, or aromatic hydrocarbon. The gasoline composition obtained at this time preferably satisfies the automobile gasoline standard of JIS K 2202.

The gasoline composition of the present invention need only contain the above-mentioned essential components, and its octane number is arbitrary, but the octane number by research method is preferably 90 or more, particularly preferably 95 or more. The research method octane number means the octane number and the octane number measured by the JIS K 2280 octane number and cetane number test methods.

In the gasoline composition of the present invention, if necessary, for example, a phenol-based or amine-based antioxidant; a metal deactivator such as a Schiff-type compound or a thioamide-type compound; Surface anti-ignition agent; Detergent / dispersant such as succinimide, polyalkylamine, polyetheramine; Deicing agent such as polyhydric alcohol and its ether; Alkali metal or alkaline earth metal of organic acid, Sulfate ester of higher alcohol A known fuel oil additive such as an anti-static agent such as an anionic surfactant, a cationic surfactant, an amphoteric surfactant, a colorant such as an azo dye, etc. can be added. Can be used alone or as a mixture. The amount of the fuel oil additive added is arbitrary, but the total amount is preferably 0.1% by weight or less based on the total amount of the gasoline composition. Furthermore, if necessary, for example, methanol, ethanol,
Isopropanol, t-butanol, methyl-t-butyl ether, ethyl-t-butyl ether, methyl-t
It is also possible to add an octane number improver such as amyl ether or ethyl-t-amyl ether. Although the addition amount of the octane number improver is arbitrary, it is preferably 20% by volume or less based on the total amount of the gasoline composition.

[0016]

Since the gasoline composition of the present invention contains vinylcyclohexene and / or tetrahydroindene without increasing the aromatic component, the octane number and calorific value of gasoline can be increased.

[0017]

The present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited thereto.

[0018]

Comparative Examples 1 to 3 Isooctane and normal heptane were mixed to give an octane number of 60 (Comparative Example 1) and an octane number of 80.
(Comparative Example 2) and an octane number of 90 (Comparative Example 3) were prepared as standard substrates. Research method octane number and octane number calculated value of each obtained base material (BLENDING OCTANE NUMBA
R: See API Research Project p45, octane number and calculated octane number of compounding agent), 15 ℃
Density (kg / L) and true heat value (Kcal / L) (JIS K
2203) was measured. The results are shown in Table 1.

[0019]

Examples 1-1 and 2-3 To each of the base materials prepared in Comparative Examples 1 to 3, the compounding agents shown in Table 1 were mixed at the compounding ratios shown in Table 1, and in the same manner as Comparative Examples 1 to 3. Each measurement was performed. The results are shown in Table 1.

[0020]

[Table 1]

From the results shown in Table 1, it is understood that the octane number and calorific value of the gasoline base material are remarkably improved by blending vinylcyclohexene and / or tetrahydroindene.

Claims (1)

[Claims] 1. A gasoline composition containing vinylcyclohexene and / or tetrahydroindene.