采用超临界二氧化碳萃取技术对有机溶剂萃取的辣椒红粗提物进行提纯、精制，制备高色价、高质量的辣椒红色素产品。
The red chilli colour product with high color value and high quality was prepared through refining capsicum oleoresin by supercritical carbon dioxide extraction method.
介绍了国外六氟化钨的制备和精制工艺进展，重点描述了电子工业中应用的高纯度六氟化钨的制备工艺。
The progresses of preparation and purification of tungsten hexafluoride, especially the preparation of high purity tungsten hexafluoride used in the electronic industry, are introduced.
结果表明：D3520、D140树脂的精制效果较好，适合制备高色价的栀子黄色素。
The results showed that D3520 and D140 macroporous resins were suitable to prepare gardenia yellow of high color value.
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