Millipore Corporation

Bruce M Dawson

Gary A O'Neill

Adam D Foley

Mohammed F Bacchus

Frank Firicano

Water to be purified is passed through a reverse osmosis step to produce a pure water stream and a waste water stream. The waste water is directed to a deionization step to produce purified deionized water which is recycled to the reverse osmosis step. The process directs far less water to waste as compared to conventional reverse osmosis processes. The process also produces water of higher organic and inorganic purity than can be obtained by either reverse osmosis or deionization alone.

Process for purifying water

Water to be purified and degassed is passed through a reverse osmosis step which a pure water stream and a high pressure waste water stream are produced. The high pressure waste water is passed through an eductor to produce a vacuum. The pure water stream is passed into a first volume of a degassifier and the vacuum is directed to a second volume of the degassifier. The first and second volume of the degassifier are separated by a hydrophobic membrane.

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Westford, MA, United States of America

Bruce M Dawson