Process and composition for purifying hydrogen selenide and hydrogen telluride, to remove moisture and oxidant impurities therefrom
US4797227A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 1987 |
| Grant date | Jan 10, 1989 |
| Priority date | — |
| Expiry date | Jul 31, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2220/56
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A scavenger, having utility for purifying a mixture comprising: PA1 (i) a primary component selected from one or more members of the group consisting of hydrogen selenide and hydrogen telluride, and PA1 (ii) impurities selected from one or more members of the group consisting of moisture and oxidants, comprising: PA2 (a) a support; and PA2 (b) associated with said support, one or more members of the group consisting of: PA3 (I) precursor compounds of the formula R.sub.3-x AlH.sub.x, wherein x is 0 or 1, and R is a hydrocarbon radical containing from 1 to 12 carbon atoms; and PA3 (II) aluminum chalconides of the formula Al.sub.2 M.sub.3, wherein M is selenium or tellurium. Illustrative supports useful in such scavenger include aluminosilicates, alumina, silica, carbon, and macroreticulate polymers. A process and apparatus are disclosed for purifying hydrogen selenide and/or hydrogen telluride, to remove moisture and/or oxidant impurities therefrom, in which a bed of the scavenger is employed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.