Process for the separation of butenes and butanes by extractive

Details Process for the separation of butenes and butanes by extractive Process for the separation of butenes and butanes by extractive

1992-03-20

1994-02-22

Manoharan, Virginia

Distillation: processes, separatory

Adding material to distilland except water or steam per se

At least two materials

203 52, 203 56, 203 58, 203 60, 203 63, 203 68, 203 69, 203 78, 203 80, 585802, 585809, 585860, 585865, 585866, 585867, B01D 340

Patent

active

052883701

ABSTRACT:
For the separation of butenes and butanes by extractive distillation, a charge mainly containing butenes and butanes is contacted in an extractive distillation column under pressure with a first selective polar solvent, S1 (e.g., dimethyl formamide), the butanes being collected at the top. The solvent S1 containing the butenes and passing out at the bottom is mixed with a second solvent, S2, having a boiling point intermediate between that of butenes and that of the solvent S1, the mixture passing into a desorption column under pressure, where the butenes are collected at the top. The mixture of solvent S1 and S2 is separated in a purification column under atmospheric pressure, the solvent S2 passing out at the top is recycled to the desorption column, and the solvent S1 passing out at the bottom is recycled to the extractive distillation column.

REFERENCES:
patent: 3898135 (1975-08-01), Tidwell et al.
patent: 4081332 (1978-03-01), Hein
patent: 4134795 (1979-01-01), Howat, III
patent: 4379025 (1983-04-01), Yudovich et al.
patent: 4419188 (1983-12-01), McCall
patent: 4515661 (1985-05-01), Ogura et al.
patent: 4555312 (1985-11-01), Ogura
patent: 4556461 (1985-12-01), Ogura et al.
patent: 4629533 (1986-12-01), Drake
patent: 5100515 (1992-03-01), Lee et al.

Affiliated with

Also associated with

Rating

Process for the separation of butenes and butanes by extractive does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the separation of butenes and butanes by extractive , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the separation of butenes and butanes by extractive will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-168704