公开(公告)号：US3801651A

公开(公告)日：1974-04-02

申请号：US3801651D

申请日：1971-12-20

Applicant: BAYER AG

Inventor： ADOLPHEN G ,  WEDEMEYER K ,  SUTTER W

IPC: B01J23/00 ,  B01J23/40 ,  B01J23/44 ,  B01J23/58 ,  C07C37/07 ,  C07C45/71 ,  C07C43/20

CPC classification number: C07C45/71 ,  B01J23/005 ,  B01J23/44 ,  B01J23/58 ,  C07C37/07 ,  C07C41/18 ,  C07C2601/14 ,  Y02P20/582 ,  C07C49/517 ,  C07C49/753 ,  C07C43/23 ,  C07C43/253 ,  C07C39/08

Abstract: PYROCATECHOL AND ITS MONOETHERS ARE PREPARED BY DEHYDROGENATING THE CORRESPONDING CYCLOHEXANONE COMPOUNDS OVER PALLADIUM ON A LITHIUM-ALUMINUM SPINEL CARRIER AT TEMPERATURES OF 150* C. TO 300*C.

公开(公告)号：US3754007A

公开(公告)日：1973-08-21

申请号：US3754007D

申请日：1970-02-06

Applicant: BAYER AG

Inventor： SUTTER W ,  WEDEMEYER K

IPC: C07C45/57 ,  C07D303/48 ,  C07D493/10 ,  C07D1/02 ,  C07D13/00

CPC classification number: C07D493/10 ,  C07C45/57 ,  C07D303/48 ,  C07C49/403

Abstract: CYCLOHEXANEDIONE-(1,2)-HEMIHYDRATE ISOBTAINED BY INTRODUCING CYCLOHEXANOL, OPTIONALLY CONTAINING WATER, AND NITRIC ACID SIMULTANEOUSLY INTO AQUEOUS SULPHURIC ACID CONTAINING A CATALYTIC AMOUNT OF NITROUS ACID WITH THROOUGH MIXING AT A TEMPERATURE OF 0* TO 18*C.