Abstract: Paraxylene (PX) is the leading raw material of polyester industry in China and an important bulk product in chemical industry. With the popularization of ‘Double Carbon’ strategy in China, the raw materials of chemical manufacturing industry are gradually changing from non-renewable resources (petroleum and coal) to renewable resources. The development of bio-based PX production process from lignocellulosic biomass can not only promote the comprehensive utilization of lignocellulose as a renewable resource, but also promote the development of green and low-carbon manufacture of polyethylene terephthalate (PET) polyester monomer, connect the two. Based on this, the research status of various preparation routes of bio-PX was reviewed, and their advantages and disadvantages were analyzed. Combined with process simulation and economic analysis, the problems of high production cost and low production capacity in bio-based PX process were pointed out.

Key words: lignocellulose, biomass, p-xylene, sustainable polymers