公开(公告)号：US12180141B2

公开(公告)日：2024-12-31

申请号：US17659086

申请日：2022-04-13

Applicant: Evonik Operations GmbH

Inventor： Dirk Roettger ,  Sebastian Reimann ,  Niklas Paul ,  Armin Matthias Rix ,  Moritz Schröder ,  Philip Zitzewitz

IPC: C07C29/70

Abstract: A process produces sodium and/or potassium alkoxides in countercurrent by reactive rectification. Alcohol is reacted in countercurrent with the respective alkali metal hydroxide. The vapours containing alcohol and water are separated in at least two serially arranged rectification columns. The energy of the vapour obtained in the second rectification is utilized for operating the first rectification. This specific energy integration coupled with establishing a certain pressure difference in the two rectification stages makes it possible to cover a particularly large proportion of the energy required for the rectification through heating steam and minimizes the use of electricity.

公开(公告)号：US20240308942A1

公开(公告)日：2024-09-19

申请号：US18275469

申请日：2022-01-27

Applicant: EVONIK OPERATIONS GMBH

Inventor： Dirk Roettger ,  Sebastian REIMANN ,  Niklas PAUL ,  Armin RIX ,  Philip ZITZEWITZ ,  Moritz FCHRÖDER

IPC: C07C29/70 ,  C07C29/80

CPC classification number: C07C29/70 ,  C07C29/80

Abstract: The present invention relates to a process for preparing alkali metal alcoholates in counter flow by way of reactive rectification, the alkali metal being selected from sodium and potassium. The process is carried out in at least one reaction column and at least one rectification column. The process according to the invention is characterized in that the heating steam used for operating the columns and thus for carrying out the process condenses, and that the energy is used in the condensed water.