Diesel light oil composition

Abstract

To provide a diesel light oil composition having an excellent ignitability while containing butanol. The diesel light oil composition comprises a diesel light oil base material, butanol having a volume percentage in a range of 9% to 20% and butyl nitrate or butyl nitrite having a volume percentage in a range of 0.8% to 4%. It is preferable that the butanol is 20 v / v %, and the butyl nitrate or butyl nitrite is 4 v / v %. The butyl nitrite or butyl nitrate is derived from butanol as a material.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a diesel light oil composition.[0003]2. Description of the Related Art[0004]In recent years, it has been demanded to reduce the discharged amount of carbon dioxide for the purpose of preventing the global warming, and various means to reduce the discharged amount of carbon dioxide have been proposed. As one of such means, it is known to use ethanol, butanol or the like obtained by fermentation and distillation of botanical materials, for example, agricultural crops such as sugar cane and corn as fuels or the like for vehicles.[0005]Carbon contained in the botanical materials comes from atmospheric carbon dioxide which has been absorbed through photosynthesis by plants serving as raw materials. Therefore, the amount of carbon dioxide discharged upon combustion of the botanical materials is equal to the amount of carbon dioxide which has been absorbed by the plants, and as a result, the di...

AI Technical Summary

Benefits of technology

[0008]The present invention has been accomplished in view of the aforementioned problems, and it is therefore an objective of the present invention to provide a diesel light oil composition having an excellent ignitability while containing butanol therein.

[0010]The diesel light oil composition of the present invention enables to attain an excellent ignitability despite of containing butanol therein by containing butyl nitrite or butyl nitrate in the above described range along with butanol in the above described range.

[0011]In the diesel light oil composition of the present invention, when the butanol mentioned above is a botanical material obtained by fermentation and distillation of agricultural crops, for example, sugar cane, corn or the like, discharged amount of carbon dioxide due to the butanol can be considered to be zero owing to the carbon neutral effect, and as a result, the discharged amount of carbon dioxide can be reduced.

[0014]It is known that an alkyl nitrate having 6 or 8 carbon atoms is used as a cetane number improver to improve the ignitability of diesel light oil (see Japanese Patent No. 3102934), but it has not been known that butyl nitrite or butyl nitrate is used as such a cetane number improver.

[0015]In the diesel light oil composition of the present invention, the butyl nitrite or butyl nitrate may be synthesized through any kind of reaction path, but those derived from butanol as a raw material are preferable. According to the diesel light oil composition of the present invention, the butyl nitrite or butyl nitrate can not only improve the ignitability of the diesel light oil composition containing butanol, but also contribute to the reduction on the discharged amount of carbon dioxide along with butanol when butanol is used as a raw material.

Problems solved by technology

However, since butanol has a low ignitability, there is a disadvantage that a fuel in which butanol is mixed in the diesel light oil has also deteriorated ignitability.