| 摘要 |
<p num="1"><br/><br/><br/>Porous polymeric membranes formed from a hydrophobic polymer, such as halar <br/>having membrane pores of a size sufficient to permit gas and/or vapour <br/>permeation 0.05 μm to 5pm without permitting the flow of a hydrophilic <br/>fluid across the membrane. Pore distribution is uniform and porosity is high, <br/>in some cases up to 80%. Membranes may be in the form of a flay sheet or <br/>hollow fibre for example and can be used in a variety of applications such as <br/>stripping HF gas, degassing of caustic solution, chlorine gas/alkaline <br/>filtration, degassing tap water to remove dissolved chlorine. Processes used <br/>to make such membranes can be carried out using relatively non toxic solvents <br/>such as citric acid ethyl ester or glycerol triacetate.<br/>
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