| 摘要 |
PURPOSE:To obtain the title compound having extremely low sulfur and nitrogen contents with a long catalytic life and in high yield by hydrogenating a kerosine fraction to make sulfur and nitrogen contents <= specific concentrations, subjecting the resultant substance to reforming reaction to give a formed oil and recovering the title compound from the formed oil. CONSTITUTION:A kerosine fraction is hydrogenated under a severe condition, sulfur and nitrogen contents are made into <=1ppm, respectively to give a hydrogenated oil, from which n-paraffin is recovered to give raffinate. The raffinate is subjected to reforming reaction. Then methylnaphthalenes are recovered from the prepared formed oil to efficiently give methylnaphthalenes having <=1ppm sulfur content and <=1ppm nitrogen content. Sulfur and nitrogen contents >=the above-mentioned concentrations extremely shorten the catalytic life of the reforming process and exert poisoning actions on zeolite in the following isomerization and adsorption and separation processes in production of 2,6- dimethylnaphthalene useful as a raw material of polyester. |
