Method of preparing isopropyl alcohol

A method of preparing isopropyl alcohol, the method comprising:

• supplying a feed stream including a propylene monomer and water to a reaction unit;
• reacting the propylene monomer and water to produce a reaction product including isopropyl alcohol, the propylene monomer, and water;
• separating the reaction product into a first discharge stream including a gaseous reaction product and a second discharge stream including a liquid reaction product;
• supplying the first discharge stream and the second discharge stream to a stripper, respectively;
• and
• circulating an upper discharge stream including the propylene monomer from the stripper to the reaction unit and supplying a lower discharge stream including water and isopropyl alcohol from the stripper to an isopropyl alcohol purification unit,
• wherein the first discharge stream is condensed by a first heat exchanger and supplied as a liquid phase to the stripper.