Process for recovering CF4 and C2F6 from vent gases of an aluminum production cell

申请公布号：US5968334(A)

申请号：US19980071200

申请日期：1998.05.01

申请公布日期：1999.10.19

申请人：

AMERICAN AIR LIQUIDE INC.

发明人：LI, YAO-EN

分类号：B01D53/22;C25C3/22;(IPC1-7):C25C3/22

主分类号：B01D53/22

摘要：A process for recovering at least one of CF4 and C2F6 from a vent gas from an aluminum electrolysis cell. The process includes the steps of: (a) removing inorganic fluorides from a vent gas comprising inorganic fluorides and at least one of CF4 and C2F6 to obtain a purified vent gas; and (b) contacting the purified vent gas with a membrane at conditions effective to obtain a retentate stream rich in at least one of CF4 and C2F6, and a permeate stream depleted in at least one of CF4 and C2F6.

RESIST COATER

PROLIFERATED AND IMMOBILIZED SUBSTANCE OF MICROORGANISM AND ITS PRODUCTION

METHOD FOR RESTRAINING HINDRANCE TO SOLID-LIQUID SEPARATION OF ACTIVATED SLUDGE

MASK PROTECTION DEVICE

METHOD AND DEVICE FOR MEASURING FLOW RATE OF CELLS

SEMICONDUCTOR MEMORY

IMAGE COMMUNICATION EQUIPMENT

LIGHT EMISSION DEVICE FOR BICYCLE

CARRIED ARTICLE ROTATING DEVICE

METHOD AND APPARATUS FOR MANUFACTURING FRP CYLINDER

BURST DATA RECOVERY CIRCUIT

METHOD FOR ADHERING PRISM COUPLER AND COUPLER PRISM

CONTROL OF DISPLACEMENT TYPE MACHINE OF HYDROSTATIC PRESSUREMECHANICAL TYPE LOAD INTERRUPTER

METHOD FOR DEPOSITING MAGNETIC TONER ON BLADE IN DEVELOPING DEVICE

IMAGE FORMING DEVICE

PLASTIC OPTICAL FIBER

PRODUCTION OF PLASTIC OPTICAL FIBER

MANUFACTURE OF OXIDE SUPERCONDUCTIVE WIRE MATERIAL

PNEUMATIC TIRE

DISCHARGE LAMP LIGHTING DEVICE