PT67236A - Method for purification of 4-methyl-2,6-di-tertbutylpheno - Google Patents
Method for purification of 4-methyl-2,6-di-tertbutylphenoInfo
- Publication number
- PT67236A PT67236A PT6723677A PT6723677A PT67236A PT 67236 A PT67236 A PT 67236A PT 6723677 A PT6723677 A PT 6723677A PT 6723677 A PT6723677 A PT 6723677A PT 67236 A PT67236 A PT 67236A
- Authority
- PT
- Portugal
- Prior art keywords
- prod
- butylphenol
- methanol
- methyl
- stabiliser
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Anti-Oxidant Or Stabilizer Compositions (AREA)
Abstract
Purificn. of 4-methyl-2,6-di-t-butylphenol (I) comprises crystallising at 0-5 degrees C from methanol contg. 3-10 w/w % of water, the ratio of solute to aq. methanol ranging from 1:1 to 1:4. The prod. is made by O-alkylation of phenol then aminomethylation and hydrogenolysis of the resultant N,N-dimethyl-3,5-di-ti-butyl-4-hydroxybenzylamine. Aq. methanol containing 3% of water leads to increased losses of prod. The prod. is a colourless stabiliser for synthetic rubber and polymers, an antioxidant for oils, fuels and other petroleum prods. as stabiliser in foods and drugs. The process removes impurities such as 2,6-di-t-butylphenol 2,4,6-tri-t-butylphenol and 2,6-di-ti-butyl-4-methylcyclohexanone with reduced losses of the desired prod. which is obtd. at a purity of =99.95%.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PT6723677A PT67236B (en) | 1977-11-03 | 1977-11-03 | Method for purification of 4-methyl-2,6-di-tertbutylphenol |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PT6723677A PT67236B (en) | 1977-11-03 | 1977-11-03 | Method for purification of 4-methyl-2,6-di-tertbutylphenol |
Publications (2)
Publication Number | Publication Date |
---|---|
PT67236A true PT67236A (en) | 1977-12-01 |
PT67236B PT67236B (en) | 1979-04-16 |
Family
ID=20082151
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PT6723677A PT67236B (en) | 1977-11-03 | 1977-11-03 | Method for purification of 4-methyl-2,6-di-tertbutylphenol |
Country Status (1)
Country | Link |
---|---|
PT (1) | PT67236B (en) |
-
1977
- 1977-11-03 PT PT6723677A patent/PT67236B/en unknown
Also Published As
Publication number | Publication date |
---|---|
PT67236B (en) | 1979-04-16 |
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