公开(公告)号：US3891678A

公开(公告)日：1975-06-24

申请号：US39151673

申请日：1973-08-24

Applicant: STAMICARBON

Inventor： VERHEIJEN EGIDIUS J M ,  THOMA JOZEF A ,  DEUMENS JOHANNES J M

IPC: B01J23/00 ,  C07B61/00 ,  C07D311/00 ,  C07D311/06 ,  C07D311/08 ,  C07D311/10 ,  C07D311/20 ,  C07D7/26

CPC classification number: C07D311/20 ,  C07D311/06 ,  C07D311/08

Abstract: A process for dehydrogenating hexahydrocoumarin or alkylated derivatives thereof is disclosed, wherein the selection of specific process conditions allows substantial amounts of coumarin or alkylated derivatives thereof to be produced along with dihydrocoumarin or alkylated derivatives thereof. The hexahydrocoumarin or derivatives are contacted with the catalyst at about the dehydrogenation temperature and then are dehydrogenated in the presence of a Group VIII metal dehydrogenation catalyst in the liquid phase at a temperature of 200*-375*C while removing hydrogen from the reaction zone, and the reaction product contains coumarin or alkylated derivatives thereof in a molar ratio of coumarin compounds:dihydrocoumarin compounds of at least 1:5. Coumarin and dihydrocoumarin, as well as alkylated derivatives thereof, are known compounds which are used in the fragance industry.

Abstract translation: 公开了一种使六氢香豆素或其烷基化衍生物脱氢的方法，其中特定工艺条件的选择允许与二氢香豆素或其烷基化衍生物一起产生大量的香豆素或其烷基化衍生物。 六氢香豆素或衍生物在约脱氢温度下与催化剂接触，然后在第Ⅷ族金属脱氢催化剂存在下，在液相中，在200-375℃的温度下脱氢，同时从反应区除去氢气， 并且反应产物含有以香豆素化合物：二氢香豆素化合物的摩尔比为至少1:5的香豆素或其烷基化衍生物。