How to get ethanol from ethylene?

The chemical reaction for producing ethanol from ethylene is CH2 = CH2 (g) + H2O (g) → CH3-CH2-OH (l). This process is known as the hydration of ethylene (alkene), it takes place at a temperature of 300 degrees Celsius, at a pressure of 60 to 70 atm. The reaction catalyst is phosphoric acid (H3PO4) or sulfuric acid (H2SO4) with SiO2. This type of reaction is called reversible. The output is 5% ethylene. Enthalpy of reaction: -45 kJ / mol.