公开(公告)号：CA1234825A

公开(公告)日：1988-04-05

申请号：CA473192

申请日：1985-01-30

Applicant: BASF AG

Inventor： OHLINGER RAINER ,  SCHNEZ HARALD ,  PFANNENSTIEHL LUDWIG ,  BLUMENBERG BERND ,  RAABE HANS J

IPC: C07C263/10 ,  C07C265/04 ,  C07C265/12 ,  C07C119/042

Abstract: PROCESS FOR THE CONTINUOUS PREPARATION OF ORGANIC MONO- AND/OR POLYISOCYANATES Summary of the Disclosure The invention relates to a process for the continuous preparation of organic isocyanates, preferably polyisocyanates, through the reaction of organic amines, preferably polyamines, with phosgene in the presence of organic solvents under pressure, for example from 5 to 100 bar, at elevated temperatures, for example from 100 to 220.degree.C, whereby the reaction mixture is partially recycled, preferably using natural circulation, and the hydrogen chloride content in the reaction mixture prior to the addition of the amine is less than 0.5 percent by weight based on the total weight of the reaction mixture and the molar ratio of phosgene to NH2 group in the organic amines is from 12:1 to 200:1.

公开(公告)号：CA1148972A

公开(公告)日：1983-06-28

申请号：CA350183

申请日：1980-04-18

Applicant: BASF AG

Inventor： KOEHLER WALDEMAR ,  BLUMENBERG BERND ,  VOGEL LUDWIG ,  HETZEL ECKHARD

IPC: C07C265/14 ,  B01D1/14 ,  B01D1/18 ,  B01D3/34 ,  B01J8/24 ,  C07C67/00 ,  C07C241/00 ,  C07C263/20 ,  C07C265/12 ,  C07C119/048

Abstract: SEPARATING TOLUENE DIISOCYANATE AND/OR HIGHER BOILING SOLVENTS FROM DISTILLATION RESIDUES OF THE TOLUENE DIISOCYANATE MANUFACTURE USING A FLUIDIZED BED A process for separating toluene diisocyanate and/or higher boiling solvents from distillation residues obtained from the phosgenation of toluene diamine in the presence of solvents wherein the separation takes place in a fluidized bed at temperatures of 140.degree.C to 280.degree.C.