Process for the hydrogenation of benzene to cyclohexane
AssigneeChinese Petroleum Corporation
InventorsShao-Chueh Hu, I-Kai Wang, Jung-Chung Wu
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Abstract
The present invention relates to an improvement in a process for the conversion of benzene in gas-phase to cyclohexane under a suitable operation conditions by hydrogenation over a specific supported nickel catalyst located on a fixed bed reactor, the improvement comprising that the specific supported nickel catalyst is a nickel catalyst supported by a mixture of titanium dioxide and zirconium dioxide. The present invention also relates to the operation condition for the hydrogenation of benzene, the optimal components of the catalyst used, process for the preparation of said specific supported catalysts and the conditions for pretreatment.
Claims6
A process for converting benzene to cyclohexane by hydrogenation over a supported nickel catalyst comprising the steps of:
- mixing together and precipitating solutions of titanium compounds and zirconium compounds wherein said compounds are present in a atomic ratio of 25 Ti/75 Zr to 75 Ti/25 Zr;
- calcining said mixture at a temperature between 450.degree. C. and 750.degree. C. to produce a support;
- impregnating the surface of said support with a solution of nickel salt such that the nickel content is 2-18 weight percent based on the supported catalyst;
- calcining the resulting support at a temperature below 150.degree. C.;
- reducing the supported catalyst at 250.degree.-350.degree. C.;
- and
- hydrogenating benzene to cyclohexane in a gas phase reaction by passing said benzene over said catalyst.
Dependencies are inferred from the claim text.