公开(公告)号：US20170158583A1

公开(公告)日：2017-06-08

申请号：US15323802

申请日：2015-07-07

Applicant: BASF SE

Inventor： Bernd HEIDA ,  Julia HOFINGER ,  Peter RENZE

IPC: C07C7/08 ,  C10G21/20

CPC classification number: C07C7/08 ,  B01D3/32 ,  B01D3/40 ,  B01F5/0415 ,  B01F5/0428 ,  B01F5/061 ,  B01F2005/0636 ,  C10G21/20 ,  C07C9/10 ,  C07C11/08

Abstract: What is proposed is a column (K) comprising separatory internals (E) for separating a mixture of hydrocarbons and/or hydrocarbon derivatives (1) by extractive distillation with a selective solvent (2), with supply of the selective solvent (2) in the upper region of the column and supply of the mixture of hydrocarbons and/or hydrocarbon derivatives to be separated (1) below the supply of the selective solvent (2), the selective solvent (2) becoming laden in the column (K) with the components from the mixture to be separated (1) for which it has greater affinity and being withdrawn from the lower region of the column as laden selective solvent (3), while, by contrast, the components from the mixture to be separated for which the selective solvent (2) has a lower affinity remain in the vapor phase and are withdrawn as top stream (4), which is completely or partially condensed to obtain a condensate (5), some of which is withdrawn as product stream (6), the remainder being reintroduced to the column (K) as reflux (7), wherein said column comprises in the region of the column above the separatory internals (E) a first, substantially horizontal feed pipe (R1) for supplying the selective solvent, wherein the first, substantially horizontal feed pipe (R1) exhibits a cross-sectional narrowing to a narrowest point (V), said pipe widening again downstream of the cross-sectional narrowing, and wherein said column comprises a second feed pipe (R2) for supplying the reflux (7), said pipe joining the first, substantially horizontal feed pipe (R1) in the region of the narrowest point (V) of the cross-sectional narrowing.