FIELD: chemistry; technological processes.
SUBSTANCE: present invention relates to a method for producing 2,3,5-trimethyl benzoquinone or a mixture containing 2,3,5-trimethyl benzoquinone, which are used to produce vitamin E. Method comprises the step of oxidation of 2,3,6-trimethylphenol to 2,3,5-trimethyl benzoquinone with oxygen or an oxygen-containing gas in a two- or multi-phase reaction medium in the presence of a catalyst or catalyst system containing at least a copper (ll) halide, so that a mixture containing 2,3,5-trimethyl benzoquinone is formed. Reaction medium contains water and at least one secondary aliphatic acyclic alcohol having 6 or more carbon atoms. Invention also relates to a mixture for the synthesis of vitamin E containing 2,3,5-trimethyl benzoquinone, to use of a secondary aliphatic acyclic alcohol having 6 or more carbon atoms and to use of the mixture produced by the proposed method.
EFFECT: proposed method allows maximally preventing the formation of chlorinated byproducts, thereby improving the selectivity of the process.
18 cl, 1 tbl, 12 ex
| Title | Year | Author | Number |
|---|---|---|---|
| PROCESS FOR PREPARING 2,3,5-THRIMETHYLBENZOQUINONE | 1991 |
|
RU2039037C1 |
| PROCESS FOR PREPARATION OF 2,3,5-TRIMETHYLHYDROQUINONE | 1994 |
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|
RU2196764C2 |
| 0 |
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SU474133A3 | |
| METHOD OF PREPARING ALPHA-TOCOPHEROL (VITAMIN E) | 1998 |
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| OLIGOMERIZATION PROCESS (OPTIONS) AND A METHOD FOR PREVENTING CORROSION DURING OLIGOMERIZATION PROCESS | 2000 |
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| METHOD OF OBTAINING TRIMETHYL-N-BENZOQUINONES | 0 |
|
SU633467A3 |
| PROCESS OF PRODUCING CARBOXYLIC ACIDS, ALCOHOLS, OR ESTERS (OPTIONS) | 2000 |
|
RU2268872C2 |
