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A method and system for providing Water for Injection using reverse osmosis. Water for Injection can be produced by reverse osmosis and the reverse osmosis membrane can be kept in a constantly self-sanitizing condition. One way of obtaining a constantly self-sanitizing condition is to maintain the

A method and system for providing Water for Injection using reverse osmosis. Water for Injection can be produced by reverse osmosis and the reverse osmosis membrane can be kept in a constantly self-sanitizing condition. One way of obtaining a constantly self-sanitizing condition is to maintain the reverse osmosis membrane at an elevated temperature during production of Water for Injection.

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What is claimed is: 1. A system for producing Water for Injection comprising: a reverse osmosis unit comprising a water inlet, a water outlet, and a reverse osmosis membrane; a temperature sensor positioned in the reverse osmosis unit; a water heat exchanger positioned upstream of and fluidly conne

What is claimed is: 1. A system for producing Water for Injection comprising: a reverse osmosis unit comprising a water inlet, a water outlet, and a reverse osmosis membrane; a temperature sensor positioned in the reverse osmosis unit; a water heat exchanger positioned upstream of and fluidly connected to the reverse osmosis membrane; a water pre-heater positioned upstream of and fluidly connected to the water heat exchanger and fluidly connected to a concentrate outlet of the reverse osmosis unit; a controller responsive to a signal from the temperature sensor to provide a control signal to the water heat exchanger to maintain a water temperature at greater than or equal to 60 C. during water purification; and a storage vessel downstream of and fluidly connected to the reverse osmosis unit wherein the storage vessel maintains Water for Injection at an elevated temperature. 2. The system of claim 1, wherein the reverse osmosis membrane is made of a material capable of withstanding a temperature greater than or equal to 60�� C. 3. The system of claim 2, further comprising means for continuously providing a trans-membrane stream at a pressure of greater than about 40 psig. 4. The system of claim 1, wherein the reverse osmosis membrane is made of a material capable of withstanding a temperature greater than or equal to 80�� C. 5. The system of claim 1, wherein the storage vessel is constructed and arranged to maintain a temperature greater than or equal to 65�� C. 6. The system of claim 1, further comprising a recycle loop providing fluid communication between a downstream side of the reverse osmosis membrane and the water heat exchanger. 7. The system of claim 1, further comprising a pre-treatment device upstream of and fluidly connected to the water heat exchanger.