C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 13/277 (2006.01) C07C 7/00 (2006.01) C07C 7/10 (2006.01)
Patent
CA 2333796
A description is given of a process for the isolation of high-boiling monomers from the distillation residue formed in the cyclodimerization and cyclotrimerization of 1,3-butadiene and separation of the target products, wherein - the low boilers are separated off, - the desired target products cyclooctadiene or cyclododecatriene are isolated by distillation, - the distillation residue is extracted with a nonpolar or slightly polar solvent or solvent mixture, - insoluble oligomers and polymers crystallize at least partly and are separated off by a mechanical separation operation, - the extractant is preferably removed as low boiler by distillation and - the high-boiling monomers are preferably isolated by vacuum distillation.
May Matthias
Oenbrink Georg
Schiffer Thomas
Wilczok Norbert
Degussa Ag
Degussa-Huls Aktiengesellschaft
Fetherstonhaugh & Co.
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