Ultrapure hydroxylamine compound solutions and process of making same
US6235162A · kind A · utility
8Cited by
10References
35Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 28, 1998 |
| Grant date | May 22, 2001 |
| Priority date | — |
| Expiry date | May 28, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D5/009
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In one embodiment, the present invention relates to a method of treating a solution containing hydroxylamine, involving subjecting the solution containing hydroxylamine to fractional distillation using a packed column thereby providing a first distillate; and subjecting the first distillate to flashover distillation thereby providing a second distillate containing a hydroxylamine solution. In another embodiment, the present invention relates to an ultrapure solution simply containing hydroxylamine, at least one stabilizer, and water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.