1969 Making Bad Water Good

DuPont patented the first commercial reverse osmosis membranes for treating brackish water in 1969 and improved Permasep to the point that it was capable of desalinizing seawater in 1974. Permasep is also widely used to produce highly purified water for industrial or medical use. For its innovation in developing the Permasep B-9 permeator, the company was awarded Chemical Engineering’s Kirkpatrick Chemical Engineering Achievement Award in 1971. DuPont remains committed to advancing reverse osmosis technology and is the world leader in the production of technologies designed to make potable water available wherever it is needed.