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以下因素正在驱使苯持续供过于求：①预期的乙烯供应量增长将使联产裂解汽油量增加；②由于燃料法规的改变，从汽油中回收苯的数量有增加趋势；③为了满足二甲苯的需求，甲苯歧化和Ｃｙｃｌａｒ工艺的采用有增长趋势，将导致联产苯量增加。供过于求驱使全球苯价在整个９０年代?
The following factors are driving the persistent oversupply of benzene: 1 The anticipated increase in the supply of ethylene will increase the amount of pyrolysis gasoline produced jointly; 2 The number of benzene recovered from gasoline will increase due to changes in fuel regulations; 3 To meet the demand for xylene, Toluene disproportionation and the adoption of the Cyclar process have an increasing trend, which will lead to an increase in the amount of co-produced benzene. Oversupply drove worldwide benzene prices throughout the 1990s?