The pilot project on Zhejiang Kemao Environmental Technology’s PTP (propylene production from waste plastics) technology is set to be put into operation soon

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Recently, the pilot project for the PTP (propylene produced from waste plastics) technology—the core innovative achievement in the chemical recycling of waste plastics by Zhejiang Kemao Environmental Technology Co., Ltd.—has seen all equipment installed at the Yanzhao Green Chemical Laboratory in Hebei. The project has now entered the commissioning phase and is set to be put into operation soon. Having been deeply involved in the chemical recycling of waste plastics for 17 years, Kema Environment has used independent innovation to break foreign technological monopolies. It has developed two core technological systems: PTO (waste plastic-to-oil) and PTP (waste plastic-to-propylene). To date, the company holds over 100 patents, including nearly 50 invention patents and more than 30 international PCT patents. Its technological footprint spans multiple countries, enabling it to establish a globally leading portfolio of proprietary intellectual properties. The PTP technology implemented this time utilizes a “highly selective catalytic cracking and olefin recombination” process to achieve the targeted and efficient conversion of waste plastics into propylene. This technology is internationally leading in its entirety, filling a gap in this field domestically. This technology achieves three major disruptive breakthroughs: First, it boasts world-leading adaptability to raw materials; there is no need for water washing or pre-treatment of mixed low-value waste polyolefin plastics, making it highly suitable for China’s actual solid waste disposal conditions ； Secondly, the product yield is outstanding: the yield of propylene from pure polyolefin plastics exceeds 45%, while the by-products propane and butane account for 15%–20%. This process enables the production of all chemicals in a “pure, oil-free” state, thereby eliminating the traditional reliance on fossil fuels ； Thirdly, its low-carbon advantages are evident; processing each ton of waste plastic helps reduce carbon emissions by 2 tons, which aligns closely with the **“dual carbon” strategy. Meanwhile, all aspects of this technology—from its reaction mechanism and core equipment to its catalysts—have been independently developed, ensuring full control over the entire process chain. It offers the most competitive “Chinese innovation solution” for the global chemical recycling industry for waste plastics.