Purification of carbon dioxide
US10655912B2 · kind B2 · utility
0Cited by
8References
21Claims
0Family size
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Key dates
| Filing date | Oct 22, 2014 |
| Grant date | May 19, 2020 |
| Priority date | — |
| Expiry date | Sep 16, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/151
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Impurities that are less volatile than carbon dioxide, e.g. hydrogen sulfide, are removed from crude carbon dioxide by processes involving distillation of said crude carbon dioxide in a distillation column system operating at super-atmospheric pressure(s) to produce carbon dioxide-enriched overhead vapor and bottoms liquid enriched with said impurities. Where such processes involve a single heat pump cycle, significant savings in power consumption are realized when the distillation column system is re-boiled by at least partially vaporizing liquid in or taken from an intermediate location in the column system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.