F25J3/04436 - CPC Classification Index

ClassID:

160225 ⎘

F25J3/04436 - 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 using at least a triple pressure main column system

Sub-classes:

F25J3/04442 » {in a double column flowsheet with a high pressure pre-rectifier} 6
F25J3/04448 » {in a double column flowsheet with an intermediate pressure column} 30
F25J3/04454 » {a main column system not otherwise provided, e.g. serially coupling of columns or more than three pressure levels} 21

Recent Application in this class:

20220090855

2022-03-24

Method and apparatus for producing high-purity nitrogen and low-purity oxygen