With the rapid expansion of China's ethylene capacity and the continuous adjustment of China's industrial pattern,the amount of C5 and C9 resources produced as a by-product of naphtha cracking for ethylene production has also increased substantially.In 2023,China's capacities of cracking C5 and C9 reach 4.094 million tons per year and 3.165 million tons per year,respectively,with historical five-year average annual growth rate of about 10.9％and 8.8％.The rapid growth of cracking C5 and C9 resources has made them increasingly important for more and more companies to enhance the comprehensive utilization value of C5 and C9,and downstream deep processing enterprises are shifting from producing traditional resource-oriented products to application-oriented products.Upstream ethylene feedstocks production enterprises are also beginning to consider extending to the high-value synthetic materials downstream.
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