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The modifying Mg/Al composite catalyst was prepared by co-precipitation method and it was characterized by FTIR and BET. It was used in the ethoxylation between ethanls and EO, and the narrow-range distribution polyethers which  have steady properties were prepared. The product was characterized by FTIR and GC/MS. The molecular weight  distribution of the product can arrive to 83.28%

Modifying Mg/Al Composite Catalyst for Preparing Narrow-range Distribution Polyether