Results of TDLS application for ammonia monitoring in a process of high-purity arsine and phosphine production |
| |
| Authors: | A P Kotkov V A Ivanov N D Grishnova A V Shirayev A G Berezin A I Nadezhdinskii Y Y Ponurovskii I P Popov Y P Shapovalov D B Stavrovskii I E Vyazov |
| |
| Institution: | 1. Scientific-Industrial Enterprise “Salut”, Larina Str. 7, Nizhnii Novgorod, 603950, Russia
2. A.M. Prokhorov General Physics Institute of Russian Academy of Sciences, Vavilov Str. 38, Moscow, 119991, Russia
|
| |
| Abstract: | Using the TDLS method it has been found that ammonia (NH3) is the main impurity in arsine (AsH3) and phosphine (PH3), produced by hydrolysis of magnesium arsinide and phosphinide, respectively. NH3 behavior is abnormal in solutions of these hydrides: NH3 reveals the properties of a more volatile impurity in relation to arsine and phosphine, although its boiling temperature is higher than that of AsH3 and PH3. The observable anomaly is connected with the fact that in solutions of arsine and phosphine NH3 shows properties differing from the properties of pure ammonia. It was supposed that the influence of intermolecular interaction between ammonia molecules, when diluted by arsine or phosphine, decreases. During the purification of arsine or phosphine one must continuously monitor the NH3.concentration in the extraction of the light fraction in order to define the point at which to terminate the purification process. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
