公开(公告)号：US11518749B2

公开(公告)日：2022-12-06

申请号：US16971650

申请日：2019-02-11

Applicant: BASF SE

Inventor： Oliver Bussmann ,  Eva Koch ,  Manfred Heilig ,  Joachim Pfeffinger ,  Joerg Pastre ,  Johann-Peter Melder

IPC: C07C217/08 ,  C07C41/42 ,  C07C213/02 ,  C07C213/10 ,  C07D295/03 ,  C07D295/023

Abstract: A process for the continuous distillative separation of mixtures comprising morpholine (MO), monoaminodiglycol (ADG), ammonia, water and methoxyethanol (MOE), obtained by reacting diethylene glycol (DEG) with ammonia, wherein ammonia, water, ADG and DEG are removed by distillation and the resulting stream comprising MO and MOE is supplied to a distillation column K40 in which at a top pressure of from 20 to 2000 mbar MO, MOE and organic products having a boiling point 128° C. (1.013 bar) are removed via the bottom and organic products having a boiling point 128° C. are removed overhead, and also MO is removed via a side draw, where K40 is equipped with an evaporator for heating the bottoms, into which is fed heating vapor having a pressure of from 1 to 10 bar.

公开(公告)号：US10093615B2

公开(公告)日：2018-10-09

申请号：US15305923

申请日：2015-04-21

Applicant: BASF SE

Inventor： Manfred Heilig ,  Thomas Schulz ,  Torsten Mattke ,  Filip Nevejans ,  Kai Thiele ,  Stefan Maixner

IPC: C07C263/10 ,  C07C265/12

Abstract: The invention relates to a process for preparing isocyanates by reacting primary amines with phosgene in a solvent, where the solvent comprises a dialkyl carbonate.

公开(公告)号：US11655229B2

公开(公告)日：2023-05-23

申请号：US17056750

申请日：2019-05-08

Applicant: BASF SE ,  Kolon Plastics Inc.

Inventor： Thomas Heitz ,  Marvin Kramp ,  Manfred Heilig ,  HyunSoo Chang ,  JongMoon Kim ,  In Gi Cho

IPC: C07D317/12

CPC classification number: C07D317/12

Abstract: The present invention relates to a process for preparing dioxolane by reacting ethylene glycol with an aqueous solution of formaldehyde in the presence of an acid catalyst. The raw product comprising water, dioxolane and methanol is fed to a phase separation unit (20) wherein an organic extracting agent is present. An organic fraction stream from the phase separation unit is transferred to an upper part of a purification column (30) from which dioxolane is withdrawn as a bottom product while the distillate stream of the purification column is recycled to the phase separation unit. An aqueous fraction stream from the phase separation unit is transferred to a waste water column (40), withdrawing a waste water stream from the bottom of the waste water column, recycling a distillate stream (42) from the waste water column to the phase separation unit, and withdrawing a side stream (43) containing methanol from a stage below the feed stage of the waste water column.

公开(公告)号：US11655228B2

公开(公告)日：2023-05-23

申请号：US17056741

申请日：2019-05-08

Applicant: BASF SE ,  Kolon Plastics Inc.

Inventor： Thomas Heitz ,  Marvin Kramp ,  Manfred Heilig ,  HyunSoo Chang ,  JongMoon Kim ,  In Gi Cho

IPC: C07D317/12

CPC classification number: C07D317/12

Abstract: The present invention relates to a process for preparing dioxolane by reacting ethylene glycol with an aqueous solution of formaldehyde in the presence of an acid catalyst. The raw product comprising water, dioxolane and methanol is fed to a phase separation unit (20) wherein an organic extracting agent is present. An organic fraction stream from the phase separation unit is transferred to an upper part of a purification column (30) from which dioxolane is withdrawn as a bottom product while the distillate stream of the purification column is recycled to the phase separation unit. An aqueous fraction stream from the phase separation unit is transferred to a waste water column (40), withdrawing a waste water stream from the bottom of the waste water column, withdrawing a side stream (42) from a stage between the feed stage and the reflux stage of the waste water column and recycling this stream (42) to the phase separation unit, and withdrawing a distillate stream (43) containing methanol from the waste water column.

公开(公告)号：US10435354B2

公开(公告)日：2019-10-08

申请号：US16057482

申请日：2018-08-07

Applicant: BASF SE

Inventor： Manfred Heilig ,  Thomas Schulz ,  Torsten Mattke ,  Filip Nevejans ,  Kai Thiele ,  Stefan Maixner

IPC: C07C263/10

Abstract: The invention relates to a process for preparing isocyanates by reacting primary amines with phosgene in a solvent, where the solvent comprises a dialkyl carbonate.