JPS54138518A - Preparation of organic isocyanate - Google Patents
Preparation of organic isocyanateInfo
- Publication number
- JPS54138518A JPS54138518A JP4532978A JP4532978A JPS54138518A JP S54138518 A JPS54138518 A JP S54138518A JP 4532978 A JP4532978 A JP 4532978A JP 4532978 A JP4532978 A JP 4532978A JP S54138518 A JPS54138518 A JP S54138518A
- Authority
- JP
- Japan
- Prior art keywords
- reaction
- organic
- organic isocyanate
- react
- hydrogen chloride
- 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.)
- Pending
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
PURPOSE: To obtain a high quality organic isocyanate in high yield in a short time, by the phosgenation of an aminium hydrochloride, which is prepared by the reaction of an organic primary amine with hydrogen chloride, in the presence of an active carbon catalyst.
CONSTITUTION: An organic primary amine is dissolved in an inert organic solvent at a concentration of 5W30% and then made to react with at least 1 mol of hydrogen chloride to one amino group at 100W140°C to give an aminium hydrochloride. The compound obtained is made to react with excess (100W200%) phosgene at 100W 200°C, preferably 120W160°C in the presence of active carbon in a ratio of 0.1W10% to the amount of the amine to given an organic isocyanate. The reaction time is 1W6hr. The reactive carbon used in the reaction is filtered, recovered and reused.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4532978A JPS54138518A (en) | 1978-04-19 | 1978-04-19 | Preparation of organic isocyanate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4532978A JPS54138518A (en) | 1978-04-19 | 1978-04-19 | Preparation of organic isocyanate |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54138518A true JPS54138518A (en) | 1979-10-27 |
Family
ID=12716266
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4532978A Pending JPS54138518A (en) | 1978-04-19 | 1978-04-19 | Preparation of organic isocyanate |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54138518A (en) |
-
1978
- 1978-04-19 JP JP4532978A patent/JPS54138518A/en active Pending
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