发明名称 |
PROCESS FOR PRODUCTION OF STYRENE |
摘要 |
To provide a process for producing styrene by dehydrogenation of ethylbenzene by means of a combination of a dehydrogenation reaction and an oxidation reaction, wherein the formation of carbon dioxide is prevented in the section from a place where the dehydrogenation reaction gas is mixed with the oxygen-containing gas to the inlet of the oxidation step, thereby to produce styrene in high yield for a long period. A process for producing styrene, which comprises the following steps (1) to (3) and which is characterized in that at the time of feeding a dehydrogenation reaction gas obtained in step (1) and mixed with an oxygen-containing gas, to step (2), the conversion of oxygen by combustion is controlled to be at most 15% in the section from the place where the dehydrogenation reaction gas is mixed with the oxygen-containing gas to the inlet of step (2). Step (1) is a dehydrogenation step of reacting a raw material gas comprising at least ethylbenzene and steam in the presence of a dehydrogenation catalyst; Step (2) is an oxidation step of subjecting the dehydrogenation reaction gas obtained in the dehydrogenation step to an oxidation reaction of at least a part of hydrogen in the presence of an oxidation catalyst and in the coexistence of an oxygen-containing gas; and Step (3) is a dehydrogenation step of reacting the oxidation reaction gas obtained in the oxidation step in the presence of a dehydrogenation catalyst. |
申请公布号 |
EP1889824(A1) |
申请公布日期 |
2008.02.20 |
申请号 |
EP20060766556 |
申请日期 |
2006.06.09 |
申请人 |
MITSUBISHI CHEMICAL CORPORATION |
发明人 |
OBAYASHI, SHUJI;SUZUKI, SHOHEI;NISHIYAMA, TAKAHITO;KINOSHITA, HISAO;ITO, MITSUNOBU |
分类号 |
C07C5/48;C07B61/00;C07C5/333;C07C15/46 |
主分类号 |
C07C5/48 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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