发明名称 |
METHOD FOR PREPARING DIALKYLOXYDIANHYROHEXITOL BY ETHERIFICATION OF DIANHYDROHEXITOL USING A LIGHT ALCOHOL, IN THE PRESENCE OF AN ACIDIC CATALYST |
摘要 |
A method for preparing a dialkyloxydianhyrohexitol (dimethylisosorbide) composition by etherification of dianhydrohexitol (isosorbide). The aim is to achieve a “clean” method that avoids the use of a methylation agent such as dimethyl sulfate or methyl chloride, which generates stoechiometric quantities of salts, or expensive dialkyl-carbonates, wherein only one of the two methyl groups participates in the preparation of mixed isosorbide ethers. The method involves using at least one O-alkylation agent and a catalyst including an acid or an acid salt, preferably a catalyst having Lewis or BrØnsted acid properties. A device for carrying out the method wherein the device includes a vaporization oven and a reaction oven is also described. |
申请公布号 |
EP2885305(B1) |
申请公布日期 |
2017.03.01 |
申请号 |
EP20130758931 |
申请日期 |
2013.08.05 |
申请人 |
Roquette Frères;Centre National de la Recherche Scientifique (C.N.R.S.);Université Claude Bernard Lyon 1 |
发明人 |
IBERT, Mathias;ESSAYEM, Nadine;FECHE, Cyril;PERRARD, Alain |
分类号 |
C07D493/04 |
主分类号 |
C07D493/04 |
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