JPS5511552A - Method of increasing trans isomer content in stereoismomer mixture of 3-methylhexahydrophthalic anhydride - Google Patents
Method of increasing trans isomer content in stereoismomer mixture of 3-methylhexahydrophthalic anhydrideInfo
- Publication number
- JPS5511552A JPS5511552A JP8487478A JP8487478A JPS5511552A JP S5511552 A JPS5511552 A JP S5511552A JP 8487478 A JP8487478 A JP 8487478A JP 8487478 A JP8487478 A JP 8487478A JP S5511552 A JPS5511552 A JP S5511552A
- Authority
- JP
- Japan
- Prior art keywords
- trans isomer
- methylhexahydrophthalic anhydride
- mixture
- stereoismomer
- isomer content
- 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
Landscapes
- Furan Compounds (AREA)
Abstract
PURPOSE: The stereoisomer mixture of 3-methylhexahydrophthalic anhydride, which mainly contains the cis isomer, is treated with hydrogen in the presence of a specific metal and amine and converted into the trans isomer that shows excellent properties as a curing agent for epoxy resins.
CONSTITUTION: The stereoisomer mixture of 3-methylhexahydrophthalic anhydride consisting mainly of the cis isomer is treated with hydrogen in the presence of a metal in group VIII of the periodic table and an amine and isomerized. The temperature is 100W200°C and time is 2W10 hours. The content of the trans isomer can be changed depending on the purpose by varying the reaction temperatur and time. The starting material, over 90% cis content, is obtained by the hydrogenation of 3-methyltetrahydrophthalic anhydride. The hydrogenation and isomerization are desired to be effected continuously.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8487478A JPS5910671B2 (en) | 1978-07-11 | 1978-07-11 | Method for increasing the trans isomer content in a stereoisomeric mixture of 3-methyl-hexahydrophthalic anhydride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8487478A JPS5910671B2 (en) | 1978-07-11 | 1978-07-11 | Method for increasing the trans isomer content in a stereoisomeric mixture of 3-methyl-hexahydrophthalic anhydride |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5511552A true JPS5511552A (en) | 1980-01-26 |
| JPS5910671B2 JPS5910671B2 (en) | 1984-03-10 |
Family
ID=13842934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8487478A Expired JPS5910671B2 (en) | 1978-07-11 | 1978-07-11 | Method for increasing the trans isomer content in a stereoisomeric mixture of 3-methyl-hexahydrophthalic anhydride |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5910671B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003026770A (en) * | 2001-07-12 | 2003-01-29 | Hitachi Chem Co Ltd | Acid anhydride curing agent and epoxy resin composition |
-
1978
- 1978-07-11 JP JP8487478A patent/JPS5910671B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003026770A (en) * | 2001-07-12 | 2003-01-29 | Hitachi Chem Co Ltd | Acid anhydride curing agent and epoxy resin composition |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5910671B2 (en) | 1984-03-10 |
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