| 摘要 |
PURPOSE:To obtain a 1,4-dialkylbenzene with very high selectivity, by converting a monoalkylbenzene in the vapor phase in the presence of a catalyst prepared by treating a crystalline borosilicate with a silicic acid ester. CONSTITUTION:A monoalkylbenzene, particularly 1-3C monoalkylbenzene in the vapor phase is converted into a 1,4-dialkylbenzene, particularly p-xylene, p-ethyltoluene or p-diethylbenzene. In the process, a catalyst prepared by treating a crystalline borosilicate with a gas containing a silicic acid ester, and firing the treated ester in a gas containing oxygen, and containing at least 0.1wt% silica supported thereon is used to carry out the conversion. The above-mentioned crystalline borosilicate preferably has the diffraction pattern shown in the table in the X-ray diffraction pattern. |
