用离子交换方法制备了铜交换的分子筛，研究了将二价铜还原为一价铜的方法。

Cupric ion exchanged NaY zeolite was prepared. The method to reduce cupric into cuprous exchanged zeolite was studied.

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举例来说，过去两个月铜价已经下跌了23%，这一定程度上是因为人们担心中国对该种金属的消费——今年中国的铜消费已下降逾一半。

Copper prices, for example, have fallen 23 per cent in the past two months, partly on fears over Chinese consumption of the metal, which has fallen by more than half this year.

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但从根本上讲，一些人相信，过去几个月空前高涨的铜价可能已经起到了效果：降低了需求，刺激了废铜供应的增加。

Fundamentally, however, some believe that the unprecedented prices over the past few months may already have done their job, trimming demand and stimulating higher scrap supplies.

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