Process for improving the odor of commercial solvent used in...

B - Operations – Transporting – 01 – D

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B01D 11/04 (2006.01) B01D 3/14 (2006.01) B01D 3/34 (2006.01) B01D 15/00 (2006.01) C11D 3/00 (2006.01) C11D 3/20 (2006.01)

Patent

CA 2294400

Commercially available 2,2,4-trimethyl-1,3-pentanediol is processed by reduction, hydrogenation, recrystallization, ion exchange treatment, fractional distillation, base treatment, aqueous extraction, vacuum stripping, nitrogen sparging, or combinations thereof to improve its odor by reducing the gas phase concentrations of odorant materials typically found in commercially available 2,2,4-trimethyl-1,3-pentanediol. The resulting 2,2,4-trimethyl-1,3- pentanediol having improved odor is employed in various fabric softening compositions.

Selon la présente invention, on prend du 2,2,4-triméthyl-1,3-pendanediol du commerce et on le soumet à un traitement. Ce traitement consiste en une réduction, une hydrogénation, une recristallisation, un échange d'ions, une distillation fractionnée, un traitement de base, une extraction aqueuse, un stripage sous vide, un barbotage dans l'azote, ou une combinaison de ces opérations. On procède ainsi de façon à améliorer l'odeur du composant en réduisant les concentrations de la phase gazeuse des matières odorantes que l'on trouve d'habitude dans le 2,2,4-triméthyl-1,3-pendanediol du commerce. Le 2,2,4-triméthyl-1,3-pendanediol ainsi obtenu, qui présente une meilleure odeur, convient particulièrement à diverses compositions d'adoucissants textiles.

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