Elf Atochem S.a.

Atofina

Andr&eacute; Marbach

Roland Kotwica

For the purification of the norbornene obtained by the reaction of dicyclopentadiene or cyclopentadiene and ethylene, the crude reaction mixture containing light impurities having boiling temperatures lower than that of norbornene; medium-heavy impurities having the boiling temperatures between that of norbornene and that of ethylnorbornene; and heavy impurities containing ethylnorbornene and compounds boiling higher than ethylnorbornene, boiling temperatures greater than that ethylnorbornene, a first distillation of the crude reaction mixture is carried out in a tailing column (C ), removing a portion of the heavy impurities and a portion of the medium-heavy impurities; then a second distillation of the crude mixture, thus tailed, is carried out in a topping column (C ), removing the light impurities; and a third distillation of the mixture, thus topped, is subsequently carried out in a tailing column (C ), removing the remainder of the heavy and medium-heavy impurities.

Growing community of inventors

Verneuil en Halatte, France

André Marbach

Growing community of inventors

Verneuil en Halatte, France

Andr&eacute; Marbach

André Marbach