Combination processing of pyrolysis naphtha to obtain aromatic hydrocarbons and high-octane gasolines
- and others
In the pyrolysis of hydrocarbon feedstocks, production of the desired monomer - ethylene - is accompanied by the formation of pyrolysis naphtha, which has a high content of benzene (30%) and hence is processed solely for benzene recovery. In view of the increased demand for automotive gasolines, this processing scheme is extremely illogical. One of the possible means for rational utilization of pyrolysis naphtha is the combined production of high-octane unleaded gasolines and aromatic hydrocarbons, mainly benzene. With such a scheme, the pyrolysis naphtha and the fractions segregated from the naphtha can be processed separately. Another problem that requires a fast solution is the production of ecologically clean modified gasolines. The production and use of leaded gasolines are being phased out universally, in the interest of improving environmental health. For the improvement of octane number, tetraethyllead is being replaced by oxygen-containing compounds, mainly methyl tert-butyl ether and methyl tert-amyl ether. These oxygenates are used at concentrations of 2.0-2.7% in the gasoline. The content of aromatic hydrocarbons (particularly benzene) is limited to 1%. In this article we will describe an optimal scheme for processing pyrolysis naphtha, yielding benzene and AI-93 high-quality unleaded gasoline.
- OSTI ID:
- 191800
- Journal Information:
- Chemistry and Technology of Fuels and Oils, Vol. 29, Issue 11-12; Other Information: PBD: Jul 1994; TN: Translated from Khimiya i Tekhnologiya Topliv i Masel; No. 11, 7-8(Nov 1993)
- Country of Publication:
- United States
- Language:
- English
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