Patent ID: 7481074

Claim:
A process for the on-site delivery of a product gas having improved purity to a point of use from a container filled with liquid having less volatile contaminates, including particulates, under pressure which comprises: (a) integrating a purifier with the container; (b) converting at least a portion of the liquid to vapor in said container; (c) introducing the vapor from a headspace within said container to an interior vapor inlet in said purifier; (d) partially condensing said vapor within said interior vapor inlet thereby generating a vapor fraction and a condensate fraction and under conditions for allowing the vapor fraction to be stripped of said less volatile contaminates, including particulates, by said condensate fraction thereby generating a cooled gas having improved purity and a condensate fraction rich in less volatile contaminates, including particulates; (e) warming the thus cooled gas having improved impurity in indirect heat exchange against the vapor fraction and condensate fraction within the interior vapor inlet forming a superheated product gas of improved purity; (f) removing the superheated product gas of improved purity from the purifier through a product vapor outlet for delivery to a point of use; (g) returning said condensate fraction rich in less volatile contaminates, including particulates, to the container; and, (h) removing the container integrated with said purifier from service when the concentration of less volatile contaminates, including particulates becomes too high in said container to permit separation of less volatile contaminants, including particulates, and produce a superheated product vapor of improved purity.