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化学系统公司预测,世界乙烯需求将从1998年的8040×104t增到2003年的10500×104t/a,在此期间,年均增长率55%。乙烯生产能力将由1998年的9300×104t/a增至2003年的11700×104t/a,能力利用率由88%上升到92%。世界丙烯需求由1998年的46
Chemical Systems predicts that the world demand for ethylene will increase from 8040 × 104t in 1998 to 10500 × 104t / a in 2003, during which time the average annual growth rate was 5.5%. The ethylene capacity will increase from 9300 × 104t / a in 1998 to 11700 × 104t / a in 2003, and the capacity utilization rate will increase from 88% to 92%. World propylene demand from 1998 to 46