| 摘要 |
A stream of technical grade gas is fed to a column operated with a counter-current recycle flow to produce a higher purity, liquid intermediate product which is run to storage. The stored intermediate is then re-run to the column to produce a high purity product. A stream of technical grade gas (11), in particular nitrogen, hydrogen or argon, is fed to a column operated with a counter-current recycle flow to produce a higher purity, liquid intermediate product which is run to storage (3). The stored intermediate (3) is re-run to the column to produce a high purity product. An Independent claim is also included for a device to perform the process. |
