F25J3/04648 - CPC Classification Index

ClassID:

160259 ⎘

F25J3/04648 - CPC Classification

Classification description:

Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air; Recovering noble gases from air argon

Sub-classes:

F25J3/04654 » {Producing crude argon in a crude argon column} 18
F25J3/04721 » {Producing pure argon, e.g. recovered from a crude argon column} 26

Recent Application in this class:

20240035742

2024-02-01

Air separation unit and method for production of high purity nitrogen product using a distillation column system with an intermediate pressure kettle column