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公开(公告)号:ES2330518T3
公开(公告)日:2009-12-11
申请号:ES03789263
申请日:2003-12-13
Applicant: BASF SE
Inventor: SOHN MARTIN , STROEFER ECKHARD , NEVEJANS FILIP , PENZEL ULRICH , PALLASCH HANS-JURGEN , SANDER MICHAEL
IPC: C07C263/10 , C07C263/20 , C07C265/14
Abstract: Procedimiento para la obtención de toluilendiisocianato mediante la reacción de aminas con fosgeno en un reactor y subsiguiente separación y purificación del isocianato a partir de la mezcla de la reacción, caracterizado porque la separación y la purificación del isocianato se lleva a cabo en una columna a una presión en cabeza comprendida entre 5 y 50 mbares, preferentemente comprendida entre 10 y 20 mbares, y con una temperatura de cola comprendida entre 90 y 250ºC, de manera preferente comprendida entre 120 y 170ºC, de manera especialmente preferente comprendida entre 130 y 150ºC, y la columna se hace trabajar a contracorriente entre el gas y el líquido, retirándose en estado líquido o gaseoso la corriente de isocianato puro por una descarga lateral de la columna y el tiempo de residencia en la cola de la columna no es mayor que 6 horas, referido a la descarga de cola, y porque la columna presenta una pared separadora vertical.
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公开(公告)号:DE50311902D1
公开(公告)日:2009-10-22
申请号:DE50311902
申请日:2003-12-13
Applicant: BASF SE
Inventor: SOHN MARTIN , STROEFER ECKHARD , NEVEJANS FILIP , PENZEL ULRICH , PALLASCH HANS-JUERGEN , SANDER MICHAEL , SCHWARZ HANS VOLKMAR , MACKENROTH WOLFGANG
IPC: C07C263/10 , C07C263/20 , C07C265/14
Abstract: The present invention relates to a process for preparing isocyanates by reaction of amines with phosgene in a reactor and subsequent separation of the isocyanate from the reaction mixture leaving the reactor and purification of the isocyanate, wherein the separation and purification of the isocyanate is carried out in a column having a pressure at the top of 1-950 mbar, preferably 5-50 mbar, particularly preferably 10-20 mbar, and a temperature at the bottom of 90-250° C., preferably 120-170° C., particularly preferably 130-150° C., and the pure isocyanate stream is preferably taken off in liquid or gaseous form at a side offtake of the column.
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公开(公告)号:PT1575905E
公开(公告)日:2009-09-30
申请号:PT03789263
申请日:2003-12-13
Applicant: BASF SE
Inventor: PENZEL ULRICH , MARTIN SOHN DR , MACKENROTH WOLFGANG , STROEFER ECKHARD , NEVEJANS FILIP , PALLASCH HANS-JUERGEN , SCHWARZ HANS VOLKMAR , SANDER MICHAEL
IPC: C07C263/10 , C07C263/20 , C07C265/14
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公开(公告)号:AT442350T
公开(公告)日:2009-09-15
申请号:AT03789263
申请日:2003-12-13
Applicant: BASF SE
Inventor: SOHN MARTIN , STROEFER ECKHARD , NEVEJANS FILIP , PENZEL ULRICH , PALLASCH HANS-JURGEN , SANDER MICHAEL , SCHWARZ HANS , MACKENROTH WOLFGANG
IPC: C07C263/10 , C07C263/20 , C07C265/14
Abstract: The present invention relates to a process for preparing isocyanates by reaction of amines with phosgene in a reactor and subsequent separation of the isocyanate from the reaction mixture leaving the reactor and purification of the isocyanate, wherein the separation and purification of the isocyanate is carried out in a column having a pressure at the top of 1-950 mbar, preferably 5-50 mbar, particularly preferably 10-20 mbar, and a temperature at the bottom of 90-250° C., preferably 120-170° C., particularly preferably 130-150° C., and the pure isocyanate stream is preferably taken off in liquid or gaseous form at a side offtake of the column.
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