发明名称 |
INTEGRIERTES VERFAHREN ZUR HERSTELLUNG VON ISOCYANATEN |
摘要 |
Process for preparing organic isocyanates, which comprises the steps (a) making available a first partial amount of chlorine, with the chlorine of this first partial amount having a content of free and bound bromine and iodine of <400 ppm; (b) making available a second partial amount of chlorine; (c) reacting the first and second partial amounts of chlorine with carbon monoxide to form phosgene; (d) reacting the phosgene from step (c) with one or more primary amines to form the corresponding isocyanates and hydrogen chloride; (e) separating off and, if necessary, purifying the isocyanates formed in step (d); (f) separating off and, if necessary, purifying the hydrogen chloride formed in step (d); (g) catalytically oxidizing at least part of the hydrogen chloride separated off in step (e) by means of oxygen to form chlorine; (h) separating off the chlorine formed in step (g) and using at least a partial amount of the chlorine which has been separated off as second partial amount of chlorine in step (b). |
申请公布号 |
AT483681(T) |
申请公布日期 |
2010.10.15 |
申请号 |
AT20030784115T |
申请日期 |
2003.07.30 |
申请人 |
BASF SE |
发明人 |
WALSDORFF, CHRISTIAN;FIENE, MARTIN;STROEFER, ECKHARD;HARTH, KLAUS;JACOBS, JAN;DEBERDT, FILIP |
分类号 |
C07C263/10;B01J23/46;C01B7/04;C07C263/20;C25B1/26 |
主分类号 |
C07C263/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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