反应详情

温度

260 °C

250 Parts of dimethyl 1,4-cyclohexanedicarboxylate and 25 parts of a copper-chromium catalyst were placed in an autoclave having a volume of 2 liters, and the mixture was stirred at 260° C. and reduced with hydrogen under a hydrogen pressure of 15 MPa. Then, the catalyst was removed by filtration, methanol formed as a side product was removed from an obtained filtrate by concentration, and the remaining filtrate was distilled under reduced pressure (160-175° C./1.33-2.00×103 Pa), to give 1,4-cyclohexanedimethanol (to be sometimes referred to as “CHDM” hereinafter). This product was subjected to 1H-NMR (JNM-AL400 supplied by JEOL) to show an isomer structure ratio of 71% of a trans-isomeric compound and 29% of a cis-isomeric compound (CHDM1).

1. customThen, the catalyst was removed by filtration, methanol
2. customformed as a side product
3. customwas removed from an obtained filtrate by concentration
4. distillationthe remaining filtrate was distilled under reduced pressure (160-175° C./1.33-2.00×103 Pa)