| 摘要 |
The invention relates to a method for producing styrene by the dehydrogenation of ethyl benzene, comprising steps (i) to (iii): (i) in a first dehydrogenation step, a gas mixture containing ethyl benzene and optionally water vapour is brought into contact with a first dehydrogenation catalyst A, producing a reaction gas containing ethyl benzene, styrene and hydrogen, (ii) in an oxidation step, the reaction gas obtained in the first dehydrogenation step is brought into contact with oxygen in the presence of an oxidation catalyst, whereby the hydrogen is at least partially burnt, (iii) in a second dehydrogenation step, the reaction gas obtained in the oxidation step is brought into contact with a second dehydrogenation catalyst B, which is characterised in that the molar ratio of hydrogen to ethyl benzene in the reaction gas obtained according to the first dehydrogenation step is greater than 0.4. |
