Title:
PRODUCTION OF ISOCYANATE AND CONTINUOUS WORKING-UP OF ITS RESIDUE
Document Type and Number:
Japanese Patent JPH06336469
Kind Code:
A
Abstract:
PURPOSE: To recover pure isocyanate and a pourable, non-dusting, granular material.
CONSTITUTION: Pure isocyanate is recovered from an isocyanate-contg. residue of a phosgene/amine reaction mixture by continuously feeding such residue and a high boiling point hydrocarbon such as bitumen to a heated vacuum drier with a horizontal rotary shaft. The contents of the drier are distilled at temperature of about 160-280°C under pressure of about 2-50 mbar.
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Inventors:
HERUMANNYOOZEFU BENEDEIKUSU
BUERUNAA MOTEIKA
BUERUNAA MOTEIKA
Application Number:
JP13394194A
Publication Date:
December 06, 1994
Filing Date:
May 25, 1994
Export Citation:
Assignee:
BAYER AG
International Classes:
C07C263/10; C07C263/20; C07C265/00; C07C265/14; (IPC1-7): C07C265/00; C07C263/10; C07C263/20
Attorney, Agent or Firm:
Kawahara Kazuho