Title:
塩化水素とホスゲンの混合物を分離する方法
Document Type and Number:
Japanese Patent JP4336655
Kind Code:
B2
Abstract:
The invention relates to a process for the partial or complete separation of a mixture comprising hydrogen chloride and phosgene, possibly solvents and possibly low boilers and inerts as are typically obtained in the preparation of isocyanates by reaction of amines with phosgene, which comprises firstly carrying out a partial or complete condensation of phosgene, then a distillation or stripping step in a column to remove the hydrogen chloride from the bottom product phosgene and subsequently a scrub of the top product hydrogen chloride by means of the process solvent to absorb the phosgene in the process solvent. An after-purification by means of adsorption on activated carbon or by another suitable method can subsequently be carried out to remove solvent residues.
Inventors:
Zone, martin
Streffer, Eckhart
Nefyans, Philip
Penzell, Ulrich
Palash, Hans-Jurgen
Van den abert, peter
Debert, Philip
Jacobs, Yang, Day
Mackenroth, Wolfgang
Streffer, Eckhart
Nefyans, Philip
Penzell, Ulrich
Palash, Hans-Jurgen
Van den abert, peter
Debert, Philip
Jacobs, Yang, Day
Mackenroth, Wolfgang
Application Number:
JP2004561291A
Publication Date:
September 30, 2009
Filing Date:
December 13, 2003
Export Citation:
Assignee:
BASF SE
International Classes:
C07C263/20; C01B7/01; C01B7/07; C01B32/80; C07C263/10; C07C265/00
Domestic Patent References:
| JP58024553A | ||||
| JP51006126B1 | ||||
| JP48016905B1 |
Attorney, Agent or Firm:
Satoshi Eto
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