Process for preparing plastics using 1,6-hexanediol having an aldehyde content of less than 500 ppm
AssigneeBASF SE
InventorsRolf Pinkos, Eva Kretzschmar, Olivier Abillard, Lionel Gehringer
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Abstract
The present invention relates to a process for preparing plastics using 1,6-hexanediol having an aldehyde content of less than 500 ppm, a process for preparing 1,6-hexanediol having an aldehyde content of less than 500 ppm and also 1,6-hexanediol having an aldehyde content of less than 500 ppm.
Claims13
A process for preparing a plastic, which comprises reacting 1,6-hexanediol with at least one dicarboxylic acid or at least one diisocyanate in the presence of at least one catalyst, where the 1,6-hexanediol is a 1,6-hexanediol which has, after its preparation by hydrogenation, been subjected to at least one distillation in which the molar ratio of oxygen to 1,6-hexanediol is less than 1:100 and ≦5 ppm of catalytically active components are present during the distillation, the 1,6-hexanediol having an aldehyde content of less than 500 ppm.
A process for preparing 1,6-hexanediol having an aldehyde content of <500 ppm, which comprises:
- distillation of a mixture comprising 1,6-hexanediol, said mixture comprising ≦5 ppm catalytically active components, where the ratio of oxygen to 1,6-hexanediol during the distillation is less than 1:100
- to provide 1,6-hexanediol having an aldehyde content of less than 500 ppm.
Dependencies are inferred from the claim text.