Title:
イソシアネートを調製するためのプロセス
Document Type and Number:
Japanese Patent JP6951455
Kind Code:
B2
Abstract:
A process for preparing an isocyanate product includes providing a phosgene inlet stream and an amine in solvent inlet stream to a phosgenation mixer, the amine in-solvent inlet stream including one or more amines and one or more inert solvents, and during steady state operation compensating for a fouling pressure drop increase by decreasing a pressure drop in the phosgenation mixer over a time period divided into at least a first period of time T1 and a second period of time T2 that is subsequent to the first period of time T1. During the second period of time T2 an amine concentration of the one or more amines in the amine-in-solvent stream is higher than during the first period of time T1, and during the second period of time T2 a phosgene-to-amine ratio value in the phosgenation mixer is higher than during the first period of time T1.
Inventors:
Klinger, Artur
Gillis, Paul A.
Khan, Ilfan
Gillis, Paul A.
Khan, Ilfan
Application Number:
JP2019547650A
Publication Date:
October 20, 2021
Filing Date:
February 28, 2018
Export Citation:
Assignee:
Dow Global Technologies LLC
International Classes:
C07C263/10; B01F3/04; B01F5/00; B01F5/02; C07C265/14
Domestic Patent References:
| JP57200346A | ||||
| JP2006510692A |
Foreign References:
| US20130060062 | ||||
| WO2015144658A1 |
Attorney, Agent or Firm:
Hiroshi Kobayashi
Eiji Katayama
Norio Omori
Go Arai
Yasuhito Suzuki
Eiji Katayama
Norio Omori
Go Arai
Yasuhito Suzuki