公开(公告)号：US10081584B2

公开(公告)日：2018-09-25

申请号：US15536270

申请日：2015-12-16

Applicant: SHELL OIL COMPANY

Inventor： Kai Jürgen Fischer ,  Waldo Eugene De Villiers ,  Pieter Huizenga ,  Carmelo Perez Golf

IPC: C07C29/82 ,  C07C29/76 ,  C07C31/20

CPC classification number: C07C29/82 ,  C07C29/132 ,  C07C29/76 ,  C07C31/202 ,  C07C31/205 ,  C07C31/207

Abstract: The invention provides a process for the separation of MEG from a glycol stream comprising MEG and 1,2-BDO, said process comprising the steps of: (a) providing the glycol stream and an azeotrope-forming agent to a distillation column, (b) subjecting the glycol stream and the azeotrope-forming agent to distillation at a distillation temperature and a distillation pressure; (c) obtaining a first overhead stream comprising an azeotrope of MEG and the azeotrope-forming agent and a first bottoms stream comprising 1,2-BDO; and (d) subjecting the first overhead stream to phase separation in the presence of water to obtain an MEG-rich aqueous stream and an azeotrope-forming agent rich stream, wherein the azeotrope-forming agent is an organic solvent that forms a homogeneous azeotrope with MEG and does not form an azeotrope with 1,2-BDO at the distillation temperature and pressure.

公开(公告)号：US10035744B2

公开(公告)日：2018-07-31

申请号：US15524276

申请日：2015-11-04

Applicant: SHELL OIL COMPANY

Inventor： Pieter Huizenga ,  Kai Jürgen Fischer ,  Waldo Eugene De Villiers ,  Karin Bus ,  Dorien Veldhuizen

IPC: C07C29/86 ,  B01D11/00 ,  B01D11/04

CPC classification number: C07C29/86 ,  B01D11/0426 ,  B01D11/0492 ,  B01D2011/002 ,  C07C31/202 ,  C07C31/207

Abstract: The invention provides a process for the separation of MEG and 1,2-BDO from a first mixture comprising MEG and 1,2-BDO in a first solvent by the steps of: (i) combining said first mixture with a second solvent stream comprising a second solvent in a first extraction column; (ii) recovering (a) a second mixture of MEG and 1,2-BDO in the second solvent, wherein the molar ratio of MEG:1,2-BDO is lower in the second mixture than in the first mixture; and (b) a solution comprising MEG in the first solvent; (iii) combining said second mixture with a first washing stream, said first washing stream also comprising the first solvent in a second extraction column; (iv) recovering (c) a first extract stream comprising the second solvent and 1,2-BDO and (d) a third mixture comprising MEG and, optionally, 1,2-BDO in the first solvent.

公开(公告)号：US10266470B2

公开(公告)日：2019-04-23

申请号：US15564438

申请日：2016-04-05

Applicant: SHELL OIL COMPANY

Inventor： Pieter Huizenga ,  Kai Jürgen Fischer ,  Karin Bus ,  Waldo Eugene De Villiers ,  Carmelo Perez Golf

IPC: C07C29/82 ,  C07C29/80 ,  C07C31/20

Abstract: The invention provides a process for the separation of MEG and 1,2-BDO from a first mixture comprising MEG and 1,2-BDO in a weight ratio of at least 10:1 (MEG:1,2-BDO), said process comprising the steps of; (i) providing the first mixture as a feed to a distillation column at a point in the range of from 20 to 80% of the column height; (ii) operating the distillation at a temperature in the range of from 120 to 190° C. and at a pressure in the range of from 5 kPa to atmospheric pressure; (iii) removing an MEG stream from the distillation column at a point below the point at which the first mixture is fed; (iv) removing an overheads stream comprising an azeotrope of MEG and 1,2-BDO.