发明授权
US3575820A Process for separating ortho-isomers from diisocyanate mixtures by distillation with aluminum oxide
失效
通过与氧化铝蒸馏从二异氰酸酯混合物分离异构体异构体的方法
- 专利标题： Process for separating ortho-isomers from diisocyanate mixtures by distillation with aluminum oxide
- 专利标题（中）： 通过与氧化铝蒸馏从二异氰酸酯混合物分离异构体异构体的方法
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申请号： US3575820D申请日： 1968-11-22
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公开(公告)号： US3575820A公开(公告)日： 1971-04-20
- 发明人: SCHNABEL WILHELM J , KOBER EHRENFRIED H
- 申请人： OLIN CORP
- 专利权人： Olin Corp
- 当前专利权人： Olin Corp
- 优先权： US77834468 1968-11-22
- 主分类号： B01D3/34
- IPC分类号： B01D3/34 ; C07C69/00 ; C07C265/12
摘要：
REMOVAL OF ORTHO-ISOMERS FROM TOLYLENE DIISOCYANATE MIXTURES IS EFFECTED BY INCORPORATING ALUMINUM OXIDE WITH SAID MIXTURES AND SUBSEQUENTLY DISTILLING TO RECOVER NONVICINAL TOLYLENE DIISOCYANATE. THE ALMINUM OXIDE FUNCTIONS AS A SELECTIVE POLYMERIZATION CATALYST FOR THE ORTHOISOMERS, WHICH POLYMERIZE TO SOLID, NON-DISTILLABLE POLY MERS.
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