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US 12,662,440 B2Granted
Method for preparing isopropyl alcohol
AssigneeLG Chem, Ltd.
InventorsSa Eun Park, Sung Kyu Lee, Tae Woo Kim
Life of this patent
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Abstract
A method of preparing isopropyl alcohol that allows separation of a reaction product stream formed by reacting a propylene monomer and water in a reactor into an unreacted propylene monomer and isopropyl alcohol with high purity using an absorption column, a gas purification column, and an inert gas removal column.
Claims14
A method of preparing isopropyl alcohol, the method comprising:
- reacting a propylene monomer and water in a reactor to produce a reaction product stream;
- supplying the reaction product stream to an absorption column;
- supplying a lower discharge stream including isopropyl alcohol from the absorption column to a gas purification column;
- supplying a part of an upper discharge stream including an unreacted propylene monomer from the absorption column to an inert gas removal column;
- supplying an upper discharge stream including the unreacted propylene monomer from the gas purification column to the inert gas removal column;
- supplying a lower discharge stream including isopropyl alcohol from the gas purification column to an isopropyl alcohol purification section;
- refluxing an upper discharge stream including the unreacted propylene monomer from the inert gas removal column to the reactor;
- supplying a lower discharge stream including isopropyl alcohol from the inert gas removal column to the isopropyl alcohol purification section,
- supplying the lower discharge stream from the absorption column to a first flash drum;
- supplying an upper discharge stream from the first flash drum to the inert gas removal column;
- supplying a lower discharge stream from the first flash drum to a second flash drum;
- supplying an upper discharge stream from the second flash drum to the gas purification column;
- and
- supplying a lower discharge stream from the second flash drum to the isopropyl alcohol purification section.
11 more elements
Dependencies are inferred from the claim text.