会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 6. 发明专利
    • PRODUCTION OF 1,3-CYCLOHEXANEDIMETHANOL
    • JPH06321823A
    • 1994-11-22
    • JP13922893
    • 1993-05-19
    • TOWA KASEI KOGYO KK
    • MAGARA MITSUOONODA YOSHIMIYAMAZAKI FUMITOYONEDA SUSUMUKATO KAZUAKI
    • B01J23/46B01J23/86C07B61/00C07C29/149C07C31/27
    • PURPOSE:To enable the use of an inexpensive ruthenium catalyst, reduce the formation of impurities and economically and economically and advantageously produce the subject compound by hydrogenating a dialkyl isophthalate in two divided stages. CONSTITUTION:Hydrogen is introduced into the upper or lower end of a fixed bed continuous type hydrogenation apparatus filled with a ruthenium hydrogenating catalyst and a raw material dialkyl isophthalate or a hydrogenation product in the first stage or in both are then subjected to hydrogenating reaction under constant conditions. The resultant reactional product and the excess hydrogen are subsequently discharged. Hydrogen is then introduced into the upper or lower end of the fixed bed continuous type hydrogenation apparatus filled with a copper chromite hydrogenating catalyst and the reactional product in the first stage or compounds expressed by formula I (R is alkyl), formula II or III and the hydrogenation product in the first stage are hydrogenated under constant conditions to discharge 1,3-cyclohexanedimethanol and the excess hydrogen from the lower or upper end of the apparatus. Furthermore, the hydrogenation apparatus equipped with a perforated plate in the lower part thereof is preferably used. The resultant 1,3-cyclohexanedimethanol is useful as a raw material for polyester-based compounds.