copper modified

• 甲醛

copper modified的用法和样例：

例句

1. A new ketone resin is prepared from residuum of cyclohexanone rectification and formaldehyde with compound acid as catalyst,it is modified with pyromellitic dianhydride.
   以环己酮精馏残渣和甲醛为原料，用复合酸作催化剂，通过均苯四甲酸酐改性，合成一种新的酮树脂。