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1.发明授权Apparatus for continuously separating mixtures of substances by multistage rectifying column crystallization 失效用于连续分离物质混合物的装置通过多级整流柱结晶
公开(公告)号：US3501275A
公开(公告)日：1970-03-17
申请号：US3501275D
申请日：1968-05-27
Applicant: INVENTA AG
Inventor： SAILER RICHARD , PHILIPP HANSWERNER , BERTHER CLAU
CPC classification number: C07D201/16 , B01D9/0013 , B01D9/004 , B01D9/005 , C07C37/74 , C07C37/84 , C07C39/04
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公开(公告)号：US3476744A
公开(公告)日：1969-11-04
申请号：US3476744D
申请日：1966-06-07
Applicant: INVENTA AG
Inventor： BERTHER CLAU , SAILER RICHARD
IPC: B01D9/00 , B01D11/04 , C07D201/16 , C07D41/00 , C07D41/06
CPC classification number: C07D201/16 , B01D9/0036 , B01D9/0059 , B01D11/0488
Abstract: Lactams are purified by forming a melt of crude lactam and adding to it sufficiently finely divided solid crude lactam to make a mixture in which the melt forms 50-90% by weight, maintaining the mixture in an adiabatic state and, after melting equilibrium is reached, separating crystals of purified lactam from the mixture. The process is particularly suitable for the purification of lactams having 7-13 ring members. The crude lactam may be subjected to a preliminary treatment with potassium permanganate prior to purification.
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公开(公告)号：US3435068A
公开(公告)日：1969-03-25
申请号：US3435068D
申请日：1965-08-06
Applicant: INVENTA AG
Inventor： GEHRING ALBERT , SAILER RICHARD
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