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1·Ethyl decanoate was synthesized from capric acid and ethanol by using ferric potassium alum as catalyst.

以铁钾矾为催化剂，通过葵酸与乙醇反应合成了癸酸乙酯。

2·Since all forms of potassium alum are soluble in water, when the stone is wet or applied to wet skin, an invisible, fine layer of the mineral is rubbed off the stone and applied to the skins surface.

因为各种状态的钾明矾都能溶于水，当把它弄湿或接触湿皮肤时，会有一层肉眼看不见的细腻矿物层从钾明矾表面脱落，吸附到皮肤表面。

3·So if you just want to be on the safe side, you can make one on your own by using aluminum potassium sulfate or alum for short.

但是你如果仅仅是为了以防万一，那不如你自己用硫酸铝钾或者明矾来自己制作一件。

4·The principle and process of producing potassium-nitrogen compound fertilizer and aluminium hydroxide from potash alum are studied. Some problems are solved through the pilot test.

利用四川某含钾岩石制得的钾明矾进一步制备硫酸型钾氮肥和氢氧化铝，从原理、工艺等方面进行探讨，并通过中试解决了工业化生产所出现的问题。

5·Aluminium borate melting block was prepared by the combination of boric acid, anhydrous alum and potassium sulfate.

采用硼酸和无水明矾及硫酸钾压块、焙烧、制备硼酸铝熔块。