Method for working up crude 1,3-butadiene

Chemistry of hydrocarbon compounds – Purification – separation – or recovery – By plural serial diverse separations

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C585S810000, C208S347000, C208S074000

Reexamination Certificate

active

07393992

ABSTRACT:
Sudstituted the abstract with a new abstract as follows: The invention relates to a continuous process for separation a mixture of hydrocarbons which has beenobtained by extractive distillation of C4fraction useing a selective solvent and the hydrocarbons from the fraction C4which are more readily soluble in the selective solvent than are the butanes and the butenes. The mixture is fed into a first distillation column in which it is separated into a steam which is taken off at the top and comprises 1,3-butadiene, propyne, possibly further low boilers and possibly water and a bottom stream comprising 1,3-butadiene, 1,2-butadiene, acetylenes and possibly further high boilers, with the proportion of 1,3-butadiene in the bottom stream from the distillatin column being regulated in such a way that it is at least sufficiently high to dilute the acetylenes to outside the range in which there is a risk of spontaneous decomposition. The stream taken off from the top of the first distillation column is fed to a second distillation column and is separated into a steam which is taken off at the top and comprises propyne, possibly further low boilers and possibly water and a bottom stream comprising pure 1,3-butadiene in the second distillation column.

REFERENCES:
patent: 3436438 (1969-04-01), Hiroshi et al.
patent: 4049742 (1977-09-01), Weitz et al.
patent: 4277313 (1981-07-01), Mehra et al.
patent: 6337429 (2002-01-01), Kindler et al.
patent: 6376735 (2002-04-01), Lankton
patent: 6395953 (2002-05-01), Koga et al.
patent: 198 18 810 (1999-10-01), None

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method for working up crude 1,3-butadiene does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for working up crude 1,3-butadiene, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for working up crude 1,3-butadiene will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3963474

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.