Method of producing gasoline for car from synthetic naphtha

Abstract

The invention discloses a method of producing gasoline for a car from naphtha. The method comprises the following steps: feeding the naphtha which is synthesized by a coal indirect liquefaction process into a fractionating tower for fractioning, wherein C5-C6 which is fractioned out by a tower line I is fed to a normal paraffin hydro-isomerization process for being treated; and feeding fraction which is not lower than 80 DEG C and obtained at the tower bottom to a fixed-bed catalytic reforming process for being treated; and mixing and feeding the oil, which is obtained by the normal paraffin hydro-isomerization process and the fixed-bed catalytic reforming process, into a degassing tower for degassing to obtain a car gasoline component at the tower bottom. According to the method of producing gasoline for a car from naphtha disclosed by the invention, the fixed-bed catalytic reforming process is adopted for converting C7-C9 alkane not lower than 80 DEG C in the synthetic naphtha into aromatic hydrocarbon; and the normal paraffin hydro-isomerization process is adopted for realizing the hydrocarbon isomerization of the C5-C6 normal paraffin in the synthetic naphtha. And therefore, the octane value of the synthetic naphtha is effectively improved, and the car gasoline with indexes reaching National Gasoline Quality Standard-VI is produced.

Description

1. Technical field

[0001] The invention belongs to the technical field of gasoline production for vehicles, and in particular relates to a method for producing gasoline for vehicles using naphtha synthesized by an indirect coal liquefaction process. 2. Background technology

[0002] In my country's indirect coal liquefaction production technology, synthetic naphtha is the product of synthetic cold trap oil after hydrogenation process, and is one of the main products in the production of synthetic oil from coal liquefaction. 22% of the total. Since a large amount of mono- and di-olefins are generated during the coal-to-liquids process, these olefins are converted into normal paraffins after hydrogenation and saturation, and the content of normal paraffins in the product synthetic naphtha is generally about 85%. The n-alkanes have a lower octane number, nC6 has an octane number (RON) of 26 and nC7 has an octane number (RON) of 0. The presence of a large amount of n-alkanes af...

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