Compared with the existing production process, amine extraction process has the advantage of higher use ratio of potassium, simpler process flow, less energy need, and lower cost.

与现有生产工艺相比，具有钾利用率高、工艺流程简单、能耗少及成本低等优点。

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The technology and test results for the preparation of non-iron aluminium sulfate by primary amine extraction method are introduced. The technical and economical status of the process are also stated.

介绍了用伯胺直接从铝土矿的硫酸浸取液中萃取分离铁生产无铁硫酸铝的工艺研究内容和结果，并介绍了工艺技术经济状况。

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The lipstick sample was coated on glass slide, then the glass was put in the extraction vessel and aromatic amine compounds in the sample were extracted by microwave radiation.

先将口红涂于玻璃片上，然后用微波萃取和高效液相色谱法测定萃取液中的芳香胺类化合物。

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