Patent ID: 8895763

Claim:
A process for preparing alkylene oxide and an alkylene oxide derivative chosen from the group consisting of alkylene glycols, alkylene glycol ethers and mixtures thereof in an integrated plant having a first subplant for preparing alkylene oxide by reacting C 2 -C 6 -olefin with an oxidant in a liquid and water-containing phase, with alkylene glycols being formed as by-products, and a second subplant for preparing an alkylene oxide derivative chosen from the group consisting of alkylene glycols, alkylene glycol ethers and mixtures thereof by reacting alkylene oxide with a ring opening agent chosen from the group consisting of water, alcohols and mixtures thereof in the liquid phase being connected to the first subplant, wherein the reaction mixture which originates from the first subplant and comprises at least water and an alkylene oxide derivative chosen from the group consisting of alkylene glycols, alkylene glycol ethers and mixtures thereof is introduced into the second subplant.