Environmentally acceptable waste disposal by conversion of hydrothermally labile compounds
US5409617A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 13, 1993 |
| Grant date | Apr 25, 1995 |
| Priority date | — |
| Expiry date | Jul 13, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA62D2203/10
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a process for the disposal of waste or the conversion of hydrothermally labile chemical groups and compounds to species which are environmentally acceptable, or are amendable to further degradation by conventional disposal systems to produce environmentally acceptable products, which process comprises: PA1 (a) conveying an aqueous solution or slurry of ordnance waste material into a reaction zone capable of withstanding the temperatures and pressures of hydrothermal decomposition; PA1 (b) reacting the waste material in the reaction zone with an aqueous composition comprising one or more alkali or alkaline earth metal silicates, borates, phosphates, biphosphates, or trisubstituted-phosphates, at between 200.degree. C. and 500.degree. C. and at a pressure between 10 and 400 atmospheres for between about 0.01 and 10 minutes; PA1 (c) producing compounds which are environmentally acceptable or are amenable to further degradation by conventional disposal systems; and PA1 (d) optionally degrading further the compounds of step (e) by reaction in a conventional disposal system. The waste includes ordnance waste, process waste, agricultural waste and the like…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.