目前我国聚丙烯年生产能力已达300万吨左右,但还远不能满足国内市场的需要,自给率只有50%左右。聚丙烯产品大量依赖进口,造成国内市场价格及供给不稳。我国亟待加快发展聚丙烯产业,以替代进口,避免国内产品市场被大量挤占。扩大生产规模是替代进口的途径之一。燕山石化、齐鲁石化、扬子石化和上海石化等乙烯装置的第一轮技术改 At present, the annual production capacity of polypropylene in China has reached about 3 million tons, but it is far from meeting the needs of the domestic market. The self-sufficiency rate is only about 50%. Polypropylene products rely heavily on imports, resulting in unstable prices and supply in the domestic market. China urgently needs to speed up the development of the polypropylene industry in order to replace imports and avoid a large number of domestic product markets. Expanding production scale is one of the ways to replace imports. Yanshan Petrochemical, Qilu Petrochemical, Yangzi Petrochemical and Shanghai Petrochemical, etc.