A manufacturing method of isocyanate - Bayer Intellectual Property GmbH

Title:

A manufacturing method of isocyanate

Document Type and Number:

Japanese Patent JP6113824

Kind Code:

B2

Abstract:

The invention relates to a method for preparing isocyanates by phosgenating the corresponding amines, wherein low-boiling secondary components, excess phosgene, and the co-product hydrogen chloride are separated from the crude liquid isocyanate stream, which is obtained after the phosgenation has occurred, within a maximum of 60 minutes, and wherein the crude liquid isocyanate stream is not exposed to temperatures above 250° C. until said separation.

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Inventors:

Reiner Bruns
Wolfgang Lorenz
Andreas Karl Rausch
Stephan Welshofen
Tim Rodden Kemper

Application Number:

JP2015500856A

Publication Date:

April 12, 2017

Filing Date:

March 15, 2013

Export Citation:

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Assignee:

Bayer Intellectual Property GmbH

International Classes:

C07C263/20; C07C263/10; C07C265/14

Domestic Patent References:

JP10508859A
JP2007302672A
JP2006510712A
JP2010536928A
JP2006510696A
JP2008500296A

Foreign References:

US4118286

Attorney, Agent or Firm:

Hiroyuki Nagai
Yukitaka Nakamura
Yasukazu Sato
Satoru Asakura
Hirohito Katsunuma
Hiroshi Sorimachi
Mari Asano
Hakoda Mitsuru

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