| 摘要 |
<p>An insulating oil comprising dibenzylbenzenes which is most suitably used for impregnating a metallized plastic film capacitor is produced by the reaction of benzene or toluene with diphenylmethane or a methylated derivative thereof at 170 to 400°C in the presence of a synthetic crystalline zeolite catalyst having a molar ratio of SiO2 to Al2O3 of 20 or above, wherein the opening of a main cavity is constituted of a ten-membered oxygen ring.</p> |
