公开(公告)号：US20250033020A1

公开(公告)日：2025-01-30

申请号：US18716556

申请日：2022-12-07

Applicant: BASF SE

Inventor： Ralf Dirk LOEFFLER ,  Andreas WOELFERT ,  Erik Johannes VON HARBOU ,  Bernhard BRUNNER

IPC: B01J19/24 ,  B01J19/26

Abstract: An internal loop reactor comprises: a vertically disposed cylindrical vessel comprising a sidewall and reactor fluid outlet means; and at least one draft tube arranged vertically within the vessel. The draft tube(s) have/s an inner surface and an outer surface, wherein the draft tube(s) provide(s) (a) first conduit(s) within the draft tube(s) having a tube inlet end and a tube outlet end, and a second conduit outside of the draft tube(s) and within the sidewall, the first conduit(s) being in fluid communication with the second conduit. The reactor comprises at least one nozzle arranged concentrically to the draft tube(s) for injecting a fluid into the first conduit(s) from the tube inlet end. The inner surface of the draft tube(s) convexly curves so that the first conduit(s) exhibit(s) an annular constriction of the cross-section between the tube inlet end and the tube outlet end; wherein the constriction is located closer to the tube inlet end. Further, the outer surface of the draft tube(s) convexly curves, so that the draft tube(s) exhibit(s) a circumferential protuberance between the tube inlet end and the tube outlet end. The invention further relates to a process for performing a continuous high-pressure reaction, wherein a fluid is introduced into the internal loop reactor, and a reacted fluid is removed via the fluid outlet of the loop reactor. The curved shape of the inner surfaces of the draft tube wall(s) guides the fluid through the draft tube(s) in an optimized manner.

公开(公告)号：US20240199519A1

公开(公告)日：2024-06-20

申请号：US18284659

申请日：2022-03-29

Applicant: BASF SE

Inventor： Bernhard BRUNNER ,  Ralf PELZER ,  Florian GARLICHS ,  Miriam BRU ROIG ,  Dietmar MUELLER

IPC: C07C47/232 ,  C07C47/21 ,  C11B9/00

CPC classification number: C07C47/232 ,  C07C47/21 ,  C11B9/0015 ,  C11B9/0061

Abstract: The present invention relates to 2-aryl-pent-4-enal or 2-alkenyl-pent-4-enal derivatives as aroma chemicals. Specifically, it relates to the use of 2-aryl-pent-4-enal or 2-alkenyl-pent-4-enal derivatives as aroma chemicals and also for enhancing and/or modifying the aroma of a composition.

公开(公告)号：US20200002255A1

公开(公告)日：2020-01-02

申请号：US16488962

申请日：2018-02-27

Applicant: BASF SE

Inventor： Andrei-Nicolae PARVULESCU ,  Miriam BRU ROIG ,  Albert WERNER ,  Bernhard BRUNNER ,  Wolfgang SIEGEL ,  Stephan MAURER ,  Ulrich MUELLER ,  Michael Ludwig LEJKOWSKI

IPC: C07C29/38 ,  B01J29/70 ,  B01J29/40 ,  B01J29/46

Abstract: The present invention relates to a process for preparing an unsaturated alcohol, preferably 3,7-dimethyl-2,6-octadienal, by contacting an alkene, preferably isobutene, with formaldehyde in the presence a condensation catalyst comprising a zeolitic material comprising the framework structure of which comprises a tetravalent element Y other than Si.

公开(公告)号：US20190077736A1

公开(公告)日：2019-03-14

申请号：US16084285

申请日：2017-03-14

Applicant: BASF SE

Inventor： Martine DEHN ,  Bernhard BRUNNER ,  Klaus EBEL ,  Sabine HUBER

IPC: C07C29/56 ,  C07C45/38 ,  B01J23/44 ,  B01J23/52 ,  B01J21/04 ,  B01J21/08

CPC classification number: C07C29/56 ,  B01J21/04 ,  B01J21/08 ,  B01J23/44 ,  B01J23/52 ,  C07C33/03 ,  C07C45/38 ,  C07C47/21

Abstract: The present invention relates to a process for preparing 3-methyl-2-butenol (prenol) and 3-methyl-2-butenal (prenal) from 3-methyl-3-butenol (isoprenol), in which 3-methyl-3-butenol is subjected to a catalytic isomerization over a carbon-supported Pd catalyst in the presence of a gas mixture comprising 1% to 15% by volume of oxygen to obtain a first product mixture, and the first product mixture is subjected to an oxidative dehydrogenation over a Pd catalyst comprising SiO2 and/or Al2O3 as support material, or over a carbon-supported Pd/Au catalyst in the presence of a gas mixture comprising 5% to 25% by volume of oxygen.