Distillative separation of methane and carbon dioxide
US4383842A · kind A · utility
19Cited by
4References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 1, 1981 |
| Grant date | May 17, 1983 |
| Priority date | — |
| Expiry date | Oct 1, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S62/929
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An improvement in a Ryan/Holmes separation of methane from carbon dioxide is disclosed wherein the upper portion of a distillation column is operated at temperatures above the triple point of carbon dioxide, i.e., -70.degree. F., while still effectuating a separation of methane from carbon dioxide. This is achieved by increasing the amount of non-polar liquid agent added to the condenser of the column to an amount sufficient to maintain the condenser and all portions of the column at such temperatures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.