In this paper the nontoxic plasticizer tributyl citrate has been prepared by the catalysis of the molecular sieve and the ion exchange resin.

报导了用分子筛和离子交换树脂催化合成无毒增塑剂柠檬酸三丁酯的初探结果。

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The method of modified 13X molecular sieve by microwave composite ion-exchange was introduced.

介绍微波法对13X分子筛进行复合离子交换的方法。

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If large facilities to ensure no oil, no oil pump need not choose ethnic groups, such as: water pump, molecular sieve adsorption pump, sputter ion pumps, heat pumps.

若设施宽大务求无油时，无须选各族无油泵，如：水环泵、分子筛吸附泵、溅射离子泵、高温泵等。

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If large facilities to ensure no oil, no oil pump need not choose ethnic groups, such as: water pump, molecular sieve adsorption pump, sputter ion pumps, heat pumps.

若设施宽大务求无油时，无须选各族无油泵，如：水环泵、分子筛吸附泵、溅射离子泵、高温泵等。

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