Title:
A method for preparing Dialkyl oxydi anhydro Hexitol by etherifying Gien hydronalium Hexitol under existence of an acid catalyst using lower alcohol
Document Type and Number:
Japanese Patent JP6272326
Kind Code:
B2
Abstract:
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.
Inventors:
Matthias Ibert
Nadine Eseyem
Cyril Fuché
Alan Perard
Nadine Eseyem
Cyril Fuché
Alan Perard
Application Number:
JP2015525926A
Publication Date:
January 31, 2018
Filing Date:
August 05, 2013
Export Citation:
Assignee:
ROQUETTE FRERES
International Classes:
C07D493/04; B01J27/053; B01J27/188; B01J29/08; B01J29/40; B01J29/44; B01J29/70; B01J29/86
Foreign References:
| WO2009120703A2 | ||||
| US4770871 | ||||
| US4659846 | ||||
| US4322359 | ||||
| CN101445508A |
Attorney, Agent or Firm:
Mitsue Obuchi
Yukio Fuse
Yukio Fuse