申请人:OCCIDENTAL CHEMICAL CORPORATION
公开号:EP0495425A2
公开(公告)日:1992-07-22
A process for the production of diaryl ethers which comprises heating a compound of the formula
wherein X and Y may be selected from the group consisting of H, CN, CO₂H, CO₂R, CHO, COR, NO₂, NR3+ CF₃, provided that both X and Y may not simultaneously be H, in a solvent, in the presence of an inorganic base selected from the group consisting of the alkali metal carbonates and bicarbonates, and in the presence of a catalyst selected from the group consisting of benzoic acid, substituted benzoic acids, C2 - C14 aliphatic carboxylic acids, and alkali metal salts of said acids. A novel dinitrodiphenyl ether, a novel diaminodiphenyl ether, and polyimide resins are also disclosed.
一种生产二芳基醚的工艺,包括加热式如下的化合物
其中 X 和 Y 可选自由 H、CN、CO₂H、CO₂R、CHO、COR、NO₂、NR3+ CF₃(条件是 X 和 Y 不可同时为 H)组成的组,在溶剂中,在选自由碱金属碳酸盐和碳酸氢盐组成的组中的无机碱存在下、和选自苯甲酸、取代苯甲酸、C2-C14 脂肪族羧酸和上述酸的碱金属盐组成的组的催化剂存在下。还公开了一种新型二硝基二苯醚、一种新型二氨基二苯醚和聚酰亚胺树脂。