| 摘要 |
1,227,772. Separating gas mixtures by diffusion. GENERAL ELECTRIC CO. 2 May, 1968 [30 June, 1967], No. 20847/68. Heading B1L. Apparatus of the countercurrent flow type for separating gas mixtures by diffusion is constructed by forming a sandwich of gaspermeable membranes 14, 16 and woven separators 12, 15 defining separate flow regions A, B, C.., edge portions 13 being treated with a warm soluble waxy compound which solidifies on cooling. A potting compound 30 is used to seal the periphery of the sandwich and the waxy compound is then washed away (as at A, C) to define entry and exit passages, such that in the resulting structure gas supplied to any flow region cannot leave except through the appropriate exit passageway or through a membrane into an adjacent flow region. As described, the membranes are of silicone rubber, the waxy compound is a polyethylene glycol (M.W.=700 to 20,000) and the potting compound is a vulcanising rubber containing a siloxane. Wax is applied at corners 13, the others being cut off; the periphery is potted using a mould, the corners of the sandwich are further cut back, and the wax is washed away with water. Thus alternate flow regions A, C are exposed at each corner. |
