公开(公告)号：US09302983B2

公开(公告)日：2016-04-05

申请号：US14546587

申请日：2014-11-18

Applicant: BASF SE

Inventor： Vanessa Simone Lehr ,  Torsten Mattke ,  Carsten Knoesche ,  Heiner Schelling ,  Gerhard Olbert

IPC: C07C263/10 ,  C01B7/04

CPC classification number: C07C263/10 ,  C01B7/04 ,  Y02P20/22 ,  C07C265/00

Abstract: The present invention relates to gas phase phosgenation of amines for preparation of isocyanates. In the present invention, phosgene is prepared by reacting chlorine with an excess of carbon monoxide in a gas phase. The obtained phosgene-containing reaction mixture is divided into two streams by a thermal and/or a membrane separating process. The first stream is a low-carbon monoxide stream of no more than 1% by weight of carbon monoxide, based on a total weight of the first stream. The second stream is a carbon monoxide-rich stream of more than 10% by weight of carbon monoxide, based on a total weight of the second stream. The first stream is used as the phosgene-containing reactant stream in the gas phase phosgenation of amines to prepare isocyanates. The second stream can be recycled into the phosgene synthesis.

公开(公告)号：US08957245B2

公开(公告)日：2015-02-17

申请号：US13761997

申请日：2013-02-07

Applicant: BASF SE

Inventor： Gerhard Olbert ,  Torsten Mattke ,  Carsten Knoesche ,  Andreas Daiss ,  Jens Denecke

IPC: C07C263/00 ,  B01J12/00 ,  C07C263/10

CPC classification number: B01J12/00 ,  C07C263/10 ,  C07C265/14

Abstract: The invention relates to a process for preparing an isocyanate, which involves contacting fluid streams of amine, phosgene and inert medium in at least one mixing device, such that an inert medium stream is metered at least between one amine stream and one phosgene stream within the mixing device, and then reacting an amine with phosgene in a reaction chamber to form an isocyanate. In this process the inert medium stream is metered such that a point of first contact of the amine and the phosgene occurs at a distance from a surface of the mixing device, and a turbulent flow is present in the reaction chamber.

Abstract translation: 本发明涉及一种制备异氰酸酯的方法，其包括使胺，光气和惰性介质的流体流在至少一个混合装置中接触，使得惰性介质流至少在一个胺流和一个光气流之间计量 混合装置，然后使胺与光气在反应室中反应以形成异氰酸酯。 在该方法中，计量惰性介质流，使得胺和光气的第一次接触点在与混合装置的表面相距一定距离处发生，并且反应室中存在湍流。