Chemical Process
Reverse osmosis is normally used for the

Desalination of brackish water to produce potable (drinking) water
Purification of oxygen
Separation of helium from natural gas
Separation of isotopes of uranium from gaseous uranium hexaflouride

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Chemical Process
In the manufacture of H₂SO₄, vanadium catalyst as compared to platinum catalyst

All of these
Has a longer life and is not poisoned by arsenic
Handles lower SO₂ content gas (7 -10% SO₂), thus increasing the capital cost of the plant
Gives higher conversion efficiency

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