-
1.Recovery of benzoic acid by distillation in presence of excess water 失效
Title translation: 在过量水存在下通过蒸馏回收苯甲酸公开(公告)号:US3309289A
公开(公告)日:1967-03-14
申请号:US22923462
申请日:1962-10-08
Applicant: SNIA VISCOSA
Inventor: GIUSEPPE MESSINA , WERNER MUENCH , ROBERTO MATTONE , ENZA PASCALINO , PAOLA NOTARBARTOLO
IPC: C07C51/265 , C07C51/42 , C07C51/46
CPC classification number: C07C51/42 , C07C51/265 , C07C51/46 , C07C63/06
-
2.Process for the polycondensation of diamines and dicarboxylic acids 失效
Title translation: 二胺和二羧酸的缩聚方法公开(公告)号:US3017394A
公开(公告)日:1962-01-16
申请号:US75712658
申请日:1958-08-25
Applicant: SNIA VISCOSA
Inventor: WERNER MUENCH , CESANO MADERNO , LUIGI NOTARBARTOLO , GIUSEPPE MESSINA
IPC: C08G69/28
CPC classification number: C08G69/28
-