GB681688A - Improvements in or relating to the preparation of 1,8-diamino-p-menthane - Google Patents
Improvements in or relating to the preparation of 1,8-diamino-p-menthaneInfo
- Publication number
- GB681688A GB681688A GB12294/51A GB1229451A GB681688A GB 681688 A GB681688 A GB 681688A GB 12294/51 A GB12294/51 A GB 12294/51A GB 1229451 A GB1229451 A GB 1229451A GB 681688 A GB681688 A GB 681688A
- Authority
- GB
- United Kingdom
- Prior art keywords
- menthane
- moles
- mixture
- terpineol
- alpha
- 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.)
- Expired
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
1: 8-Diamino - p - menthane having the formula <FORM:0681688/IV (b)/1> is prepared by reacting at 15-50 DEG C. a mixture of limonene, terpin hydrate, alpha-terpineol, beta-terpineol or alpha-pinene with 2-3 moles (preferably 2-2.5 moles) of hydrogen cyanide, 1.5 to 5 moles. (preferably 1.5-2.5 moles.) of sulphuric acid and water in a quantity of 0.1-5 times the weight of the sulphuric acid (preferably 2/3 -3 times the weight of said acid), heating the mixture at 40-80 DEG C. to form a 1 : 8-diformamido-p-menthane, then heating between 80 DEG C. and the reflux temperature of the mixture in the presence of water totalling 1-9 times the weight of sulphuric acid. The product is separated by neutralizing the mixture with a strong base such as sodium, potassium or calcium hydroxide and isolating the diamine, e.g. by salting out, solvent extraction or distillation. In examples, the 1 : 8-diamine-p-menthane is prepared by the above method, using as the terpene raw material (1) and (2) terpin hydrate; (3) alpha-terpineol; and (4) limonene or turpentine.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US681688XA | 1950-07-07 | 1950-07-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB681688A true GB681688A (en) | 1952-10-29 |
Family
ID=22080841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB12294/51A Expired GB681688A (en) | 1950-07-07 | 1951-05-25 | Improvements in or relating to the preparation of 1,8-diamino-p-menthane |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB681688A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4024185A (en) * | 1973-09-05 | 1977-05-17 | Allied Chemical Corporation | Cycloaliphatic unsymmetrical diamines |
| CN100486956C (en) * | 2006-09-19 | 2009-05-13 | 中国林业科学研究院林产化学工业研究所 | Process for the preparation of alkanediamines from 1, 8-terpene diols |
-
1951
- 1951-05-25 GB GB12294/51A patent/GB681688A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4024185A (en) * | 1973-09-05 | 1977-05-17 | Allied Chemical Corporation | Cycloaliphatic unsymmetrical diamines |
| CN100486956C (en) * | 2006-09-19 | 2009-05-13 | 中国林业科学研究院林产化学工业研究所 | Process for the preparation of alkanediamines from 1, 8-terpene diols |
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