HCBBS Forum (Português)
Submit Chemical Projects / Find Solutions
Amplify Your Requirements on a Broader Chemical Platform *Engineering · Technology · Equipment · Solutions*
Submit Request

["如何控制手段才能确保塔顶产品的纯度?"

2017-03-06View Original

Thread Content

["由于同位素产品的温差较小,DCS应采用何种控制方式才能采出所需的产品?"
Reply #22024-07-29
"无法通过任何手段使塔板更高,填料层更多"
Reply #32024-07-29
"仅靠控制的话,最直观的方法就是加大回流比"
Reply #42024-11-13
["本帖最后由 qqgd 于 2224-11-13 01:55 编辑 同位素精馏分离通常是对单质同位素的分离而言,即在低温下液化气体,如液氢;也有部分同位素的气体或液体化合物的分离。由于分子量的差异,所以精馏塔的塔板层数会很多。在控制上,一般要精确控制精馏过程中的温度、压力、回流比,这种控制比常规的精馏过程要细致得多。再有就是重水分离是大规模的同位素分离,就是采用精馏的方式。以下是精馏分离同位素的基本说明:各元素的同位素及其化合物的蒸气压有差异,可以用精馏法分离同位素。精馏的分离系数等于被分离组分纯蒸气压之比,并并且随温度的降低和分子量的减少而增加。由于精馏法的工艺成熟、方法简单可靠,一些轻同位素多用此法来生产,如用低温精馏一氧化碳、一氧化氮、三氯化硼来生产碳十三、氧十八、氮十五、硼十一等同位素。工业上也曾用水的精馏来生产吨量级的重水。精馏法已用于将双温法生产的浓度约十五的重水富集到高于九八。"

Submit a Project

**Looking for Chemical Technology, Equipment & Solutions?** No Registration Required Broader Platform Exposure | Global Chemical Service Provider Connections

Submit Request — Free Consultation

Disclaimer

This is an automated machine translation of the original thread. Some technical terms may have inaccuracies; the original text shall prevail. Click "View Original" at the top right to access the source page, which supports IP-based automatic real-time language translation. Please watch out for contact details and sales inducements to prevent fraud. All content and translations are for reference only, representing solely the poster's personal views. For enquiries, email service@hcbbs.com.