Title:
仕切壁蒸留カラムを用いるトルエンジイソシアネートの混合物の精製方法
Document Type and Number:
Japanese Patent JP4443149
Kind Code:
B2
Abstract:
The invention is directed to a process for the purification of toluenediisocyanate from a crude distillation feed comprising toluenediisocyanate, an organic solvent and less than 2% by weight phosgene by separating the crude distillation feed in a dividing-wall distillation column into at least four product fractions P1 - P4, whereby P1 is a phosgene enriched low-boiler product, P2 is a solvent-enriched product, P3 is a high boiler enriched bottoms and P4 is a toluenediisocyanate product stream.
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Inventors:
Bill Brady
Friedhelm Steffens
Berthold Keggenhof
Kai Fairkerk
Gerhard Ruffelt
Friedhelm Steffens
Berthold Keggenhof
Kai Fairkerk
Gerhard Ruffelt
Application Number:
JP2003168858A
Publication Date:
March 31, 2010
Filing Date:
June 13, 2003
Export Citation:
Assignee:
Bayer Aktiengesellschaft
International Classes:
B01D3/14; C07C263/20; B01D3/32; C07C263/10; C07C265/10; C07C265/14
Domestic Patent References:
| JP5001014A | ||||
| JP61063644A | ||||
| JP10033901A | ||||
| JP59142801A |
Attorney, Agent or Firm:
Samejima Mutsumi
Genban Sanae
Genban Sanae
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