JPS57165358A - Continuous preparaion of organic isocyanate - Google Patents
Continuous preparaion of organic isocyanateInfo
- Publication number
- JPS57165358A JPS57165358A JP5121681A JP5121681A JPS57165358A JP S57165358 A JPS57165358 A JP S57165358A JP 5121681 A JP5121681 A JP 5121681A JP 5121681 A JP5121681 A JP 5121681A JP S57165358 A JPS57165358 A JP S57165358A
- Authority
- JP
- Japan
- Prior art keywords
- amine
- phosgene
- circulation circuit
- temperature
- phosgenation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
PURPOSE: To prepare the titled compound in large quantities, with a small-sized reactor, by reacting large excess phosgene with an organic primary amine in a tubular circulation circuit at a temperature to decompose a part of the intermediate, and completing the decomposition of the intermediate in the second stage reactor at higher temperature, thereby carrying out the phosgenation.
CONSTITUTION: A large excess phosgene is supplied through the phosgene-feed pipe 3 to the tubular circulation circuit 1 in the presence of an inert organic solvent. At the same time, an organic primary amine is supplied to said circulation circuit 1 through the amine-feed pipe 2, and both raw materials are circulated under a pressure of ≤10kg/cm2G at 60W100°C which is the temperature to decompose 30W70% of carbamoyl chloride produced as an intermediate. The amine (hydrochloride) is phosgenated during the circulation. The reaction mixture is then transferred through the pipe 6 to the second stage reactor maintained at 120W160°C and ≤10kg/cm2G pressure to complete the phosgenation of the unreacted amine and the decomposition of the intermediate optionally by introducing additional phosgene. After the completion of the reaction, the mixture is flashed in a flash tank 12 and degassed to obtain the objective compound.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5121681A JPS57165358A (en) | 1981-04-07 | 1981-04-07 | Continuous preparaion of organic isocyanate |
US06/364,894 US4422976A (en) | 1981-04-07 | 1982-04-02 | Continuous preparation of organic isocyanates |
DE3212510A DE3212510A1 (en) | 1981-04-07 | 1982-04-03 | METHOD FOR THE CONTINUOUS PRODUCTION OF ORGANIC ISOCYANATES |
BR8201971A BR8201971A (en) | 1981-04-07 | 1982-04-06 | PROCESS TO PREPARE AN ORGANIC ISOCIANATE CONTINUOUSLY |
MX192184A MX156500A (en) | 1981-04-07 | 1982-04-06 | CONTINUOUS PROCEDURE FOR THE PREPARATION OF ORGANIC ISOCYANATES |
FR8206087A FR2503146B1 (en) | 1981-04-07 | 1982-04-07 | PROCESS FOR THE CONTINUOUS PREPARATION OF ORGANIC ISOCYANATES |
GB8210299A GB2097789B (en) | 1981-04-07 | 1982-04-07 | Preparation of organic isocyanates |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5121681A JPS57165358A (en) | 1981-04-07 | 1981-04-07 | Continuous preparaion of organic isocyanate |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57165358A true JPS57165358A (en) | 1982-10-12 |
JPH0124783B2 JPH0124783B2 (en) | 1989-05-15 |
Family
ID=12880717
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5121681A Granted JPS57165358A (en) | 1981-04-07 | 1981-04-07 | Continuous preparaion of organic isocyanate |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57165358A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006109576A1 (en) * | 2005-04-05 | 2006-10-19 | Mitsui Chemicals Polyurethanes, Inc. | Apparatus for continuously producing polyisocyanate |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS516126A (en) * | 1974-07-04 | 1976-01-19 | Kobe Steel Ltd | Chukuseikeihinno seikeihoho oyobi sonosochi |
JPS5356635A (en) * | 1976-11-01 | 1978-05-23 | Allied Chem | Method of and apparatus for producing aromatic isocyanate |
-
1981
- 1981-04-07 JP JP5121681A patent/JPS57165358A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS516126A (en) * | 1974-07-04 | 1976-01-19 | Kobe Steel Ltd | Chukuseikeihinno seikeihoho oyobi sonosochi |
JPS5356635A (en) * | 1976-11-01 | 1978-05-23 | Allied Chem | Method of and apparatus for producing aromatic isocyanate |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006109576A1 (en) * | 2005-04-05 | 2006-10-19 | Mitsui Chemicals Polyurethanes, Inc. | Apparatus for continuously producing polyisocyanate |
US7767160B2 (en) | 2005-04-05 | 2010-08-03 | Mitsui Chemicals, Inc. | Apparatus for continuously producing polyisocyanate |
Also Published As
Publication number | Publication date |
---|---|
JPH0124783B2 (en) | 1989-05-15 |
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