Process for the purification of inert gases
US5612011A · kind A · utility
4Cited by
2References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 16, 1995 |
| Grant date | Mar 18, 1997 |
| Priority date | — |
| Expiry date | Nov 16, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B2210/0068
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Process for the purification of an inert gas recycled from a solid state polycondensation (SSP) reactor of aromatic polyester resins, comprising the step of adding the gas with oxygen or gas containing oxygen in stoichiometric quantity or in such an excess that the gas at the outlet of the catalytic bed contains no more than 250 ppm of oxygen, circulating the gas on a catalytic bed comprising Pt or Pt and Pd heated at temperatures from 250.degree. to 600.degree. C. and recycling the gas to SSP reactor with previous drying to eliminate the water formed in the oxidation stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.