C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
260/353.1
C07D 493/04 (2006.01)
Patent
CA 1298306
ABSTRACT HIGH-PURITY ALDITOL DIACETALS, FREE FROM ORGANIC SOLVENT TRACES AND PROCESSES FOR PREPARING SAME. The invention is concerned with diacetals resul- ting of the dehydrocondensation of an alditol comprising or 6 carbon atoms and a benzoic aldehyde such as in particular DBS, BEBS, BMBS or DBX, featuring a purity of at least 95% and being free of organic solvent traces, and a process for preparing the same in aqueous medium, in the presence of an acid catalyst, according to which acetalization is carried out by mixing the reactants under stirring, the reaction mixture is then neutralized by a base, then the solid phase is separated from the liquid phase and washed with warm water, wherein: the initial molar ratio of the benzoic aldehyde to the aldi- tol is lower than 2/1, the acid catalyst is an arylsul- fonic acid, the initial molar ratio of the arylsulfonic acid to the benzoic aldehyde is higher than 0.6, and the reaction temperature is lower than about 45°C. Application specially to the clarification and stabilization of polyolefins. (no drawing)
563414
Fleche Guy
Salome Jean-Paul
Goudreau Gage Dubuc
Roquette Freres
LandOfFree
High-purity alditol diacetals, free from organic solvent... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High-purity alditol diacetals, free from organic solvent..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High-purity alditol diacetals, free from organic solvent... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1225911