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1)  liquid hydrogen distillation
液氢精馏
2)  the liquid distils finely
液体精馏
1.
The liquid distils finely is one of the important components and the difficult point of chemical engi- neering principle,Base on analyzing the difficult points in teaching,procedures of the liquid distils finely,the teaching plans,the learning target and the application of the medium in teaching procedures is assurance in this paper.
液体精馏是化工原理中的重要内容之一,也是难点之一。
3)  full distillation non hydrogen
全精馏无氢
1.
Analyzes the use and market value of Argon,compares several low temperature separating methods of Argon,points out that full distillation non hydrogen Argon extraction process is suited to air separator for "Coal Replacing Oil"project,and presents the flexibility of the investment and management of Argon plan
分析氩气用途及市场价值,比较氩气生产的几种低温分离方法,指出煤代油工程空分装置宜采用全精馏无氢提氩工艺和氩装置投资经营的灵活性。
4)  producing liquid ammonia by rectification
精馏制液氨
5)  Complete-distillation hydrogen-free argon recovery
全精馏无氢制氩
6)  whole fraction oil hydrotreating
全馏分加氢精制
补充资料:液氢精馏
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CAS号:

性质:制氘的一种重要方法,它具有分离系数大(21K,α=1.70),提取率高(90%~95%),潜热最小等优点。H2、HD和D2的沸点分别为20.39K、22.13K和23.57K。氢是由o-H2、p-H2、HD、o-D2和p-D2组成多元混合物,正-仲组分的蒸气压差别很小,液氢精馏实际上是H2-HD-D2三元混合物的分离。在低浓氘时,是H2-HD二元混合物分离。常压液氢精馏时,αH2/HD随HD浓度增大而增大,αH2/D2随D2浓度增加而减小。天然氢精馏时得到的是纯HD,通过催化剂达到2HDD2+H2歧化反应,平衡后再精馏得纯D2

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