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1·R502 is considered to be one refrigerant with good performance, but it will be forbidden to be used because its pollution to the ozonic atmosphere.

R 502被认为是一种性能良好的制冷剂，但由于其对臭氧层的污染即将被禁止使用。

2·Then ozonic-hydrogen peroxide bleaching were carried out and the results show that the higher of Kappa number, the poor of the delignification selectivity and the lower of brightness rising.

然后经过臭氧-过氧化氢漂白，结果表明：卡伯值越高，脱木质素选择性越差，白度上升值越低。