Title:
イソシアナートの連続的製造方法
Document Type and Number:
Japanese Patent JP4227102
Kind Code:
B2
Abstract:
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).
Inventors:
Wallsdorf, Christian
Fine, Martin
Streffer, Eckhart
Claus
Jacobs, Jean, Dee
Debert, Philip
Fine, Martin
Streffer, Eckhart
Claus
Jacobs, Jean, Dee
Debert, Philip
Application Number:
JP2004526825A
Publication Date:
February 18, 2009
Filing Date:
July 30, 2003
Export Citation:
Assignee:
BASF SE
International Classes:
C07C263/10; B01J23/46; C01B7/04; C07C265/14
Domestic Patent References:
| JP2003503383A | ||||
| JP2001516333A | ||||
| JP10128111A |
Attorney, Agent or Firm:
Satoshi Eto
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