Title: Method for preparation of butylaldehyde group
Application Number: 95119826 Application Date: 1995.12.01
Publication Number: 1133278 Publication Date: 1996.10.15
Approval Pub. Date: 2000.12.27 Granted Pub. Date: 2000.12.27
International Classifi-cation: C07C29/141;C07C31/12;C07C31/125;C07C45/82;C07C47/02
Applicant(s) Name: Mitsubish Chemical Industries Ltd. Address:
Inventor(s) Name: Ueda Akio;Sadaie Kuninori
Attorney & Agent: BAI YIHUA
Abstract:
    A method for producing butyraldehydes, by separating and purifying mixed butyraldehyde products formed by hydroformylation of propylene, into n-butyraldehyde and isobutyraldehyde by using a distillation column, wherein the distillation column is operated under such conditions that the pressure at the top of the distillation column is within a range of from 0.001 to 0.5 kg/cm2G, and the pressure at the bottom of the column is within a range of from 0.05 to 1.0 kg/cm2G.
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