Abstract
The preparation of asymmetric polyimide ultrafiltration and reverse osmosis membranes has been described. The membranes have been characterized in terms of their filtration properties and chemical stability. They were found to be insoluble in almost any organic solvent, even at elevated temperatures. In aqueous solutions, however, their stability is rather poor and their use in reverse osmosis desalination of sea and brackish water will be limited, in spite of their good salt rejection.
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