Chemical Process
Nylon 6-6 is manufactured from

Dimethyl terephthalate and ethylene glycol
Hexamethylene diamine and maleic anhydride
Caprolactum
Hexamethylene diamine and adipic acid

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Chemical Process
Reverse osmosis is normally used for the

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

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