[Naphtha Isomerization] Isomerization of C5 and C6 alkanes

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This post was last edited by Xiao Gong 1985 on 2016-4-28 08:04. The C5/C6 low-temperature isomerization technology, along with the corresponding catalysts and process techniques, represents China’s first chloride-based low-temperature isomerization method. This technology uses feedstocks such as straight-run naphtha, hydrocracked light naphtha, reformed distillate oil, aromatics extraction residue oil, and coal-derived naphtha to directly produce high-octane gasoline additives that are low in sulfur, free of olefins and aromatics, and have a low density. These additives effectively compensate for the high levels of olefins and aromatics in catalytic and reformed gasoline, while still ensuring that the octane rating of the gasoline meets standard requirements. It is an ideal technique for producing gasoline that complies with National V and National VI standards. The core of this technology is a chlorinated low-temperature isomerization catalyst, and the industrial production of such catalysts was achieved for the first time in the country. The successful development of this technology and catalysts has addressed the challenge faced by oil refining companies in producing isomerized gasoline at low costs, providing strong technical support for upgrading gasoline products, reducing production costs, and meeting National V and National VI standards. Compared with medium-temperature isomerization technology, C5/C6 low-temperature isomerization technology has the following obvious advantages. 1. Among the investment costs, the catalyst cost for moderate-temperature isomerization technology is too high, as are the equipment expenses ； The catalyst for this technology has a low cost, and the equipment required is inexpensive ； 2. Low operating costs: The operating temperature range for medium-temperature isomerization technology is 200–350°C, resulting in high energy consumption per unit volume of product ； The operating temperature of this technology is <200°C, with low energy consumption per unit ； 3. The octane number of the product; the RON of the gasoline produced by this high-temperature isomerization technology is 79–80 ； The octane number RON of the gasoline produced by this technology can reach 83+ ； 4. High liquid yield: The product yield of the high-temperature isomerization technology is 97–98% ； The product gasoline yield of this technology can reach 99% ； 5. Flexible process flow options: This low-temperature isomerization technology allows for a variety of process flow options to be utilized, depending on the characteristics of the raw materials and the requirements of the products. This enables the selection of the optimal process scheme to maximize benefits for users, thereby meeting their demands for high-quality products.