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US 12,398,086 B2Granted
Method for preparing isopropyl alcohol
AssigneeLG Chem, Ltd.
InventorsSa Eun Park, Byung Woo Choi, Sung Kyu Lee, Sung Kyun Kim, Tae Woo Kim
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Abstract
A method of preparing isopropyl alcohol, where a propylene monomer and water are reacted in a reactor to produce a reaction product including isopropyl alcohol, and the reaction product stream is separated into unreacted propylene monomer and isopropyl alcohol with high purity using an absorption column, a first gas purification column, a second gas purification column, and an inert gas removal column.
Claims13
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 first gas purification column;
- supplying a part of an upper discharge stream including an unreacted propylene monomer from the absorption column to a second gas purification column;
- refluxing a remaining part of the upper discharge stream from the absorption column to the reactor;
- supplying an upper discharge stream including the unreacted propylene monomer from the first gas purification column to the second gas purification column;
- supplying a lower discharge stream including isopropyl alcohol from the first gas purification column to an isopropyl alcohol (IPA) purification section;
- supplying an upper discharge stream including the unreacted propylene monomer from the second gas purification column to an inert gas removal column;
- supplying a lower discharge stream including isopropyl alcohol from the second gas purification column to the IPA purification section;
- and
- refluxing an upper discharge stream including the unreacted propylene monomer from the inert gas removal column to the reactor.
8 more elements
Dependencies are inferred from the claim text.