Patent ID: 11883775
Assignee: PRAXAIR TECHNOLOGY, INC.
Field: Chemical engineering (Chemistry)
Classification: CPC B  C  Y | IPC B  C

Claim 12:
13. A pressure swing adsorption process for separating a pressurized feed supply gas containing N2 and methane which comprises continuous feeding said supply gas into a feed input end of an adsorber bed containing at least one solid adsorbent which kinetically adsorbs N2 and withdrawing the methane having a reduced amount of N2 from an exit end of the adsorber bed, which has at least 2 beds in service in which the continuous feeding of the supply gas sequentially through each of the adsorber beds produces product methane gas by using continuous feed gas, a constant product gas step, a product pressurization step, a high pressure equalization step, a product make step that overlaps with feeding the bed, at least one equalization up step and at least one low pressure equalization down step, a blow down step to depressurize the bed, wherein there is substantially no purge provided to any bed during any step in the PSA process.