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：US20190100547A1

公开(公告)日：2019-04-04

申请号：US16082581

申请日：2017-03-08

Applicant: BASF SE

Inventor： MICHAEL PUHL ,  Stephanie RENZ ,  Andreas WOELFERT

IPC: C07H3/08 ,  C07H1/00

Abstract: The present invention relates to a method for preparing 2′-O-fucosyllactose and to the protected fucosyl donor of the formula (I) used in this method. The method comprises reacting the fucose derivative of the formula (I) below with the compound of the general formula (II), in the presence of an activating reagent. In the formulae (I) and (II), the variables are each defined as follows: X is Br or a S-bound radical, namely —SCN, —S(O)n—RX1or —S—RX2, wherein RX1 preferably is an optionally substituted phenyl, and RX2 preferably is C1-C4-alkyl, 2-oxazolin-2-yl, 2-thiazolin-2-yl, benzoxazol-2-yl, benzothiazol-2-yl or pyridin-2-yl; RSi are the same or different and are radicals of the formula SiRaRbRc, wherein Ra, Rb and Rc preferably are each methyl; R1 is a C(=O)—R11 radical or an SiR12R13R14 radical, wherein R11 is preferably methyl, phenyl or tert-butyl, and R12, R13 and R14 preferably are each methyl; R2 are the same or different and are C1-C8-alkyl or together form a linear C3-C6-alkanediyl, which is unsubstituted or has 1 to 6 methyl groups as substituents; R3 are the same or different and are C1-C8-alkyl or together form a linear C1-C4-alkanediyl, which is unsubstituted or has 1 to 6 methyl groups as substituents.

公开(公告)号：US20240216861A1

公开(公告)日：2024-07-04

申请号：US18271875

申请日：2022-01-05

Applicant: BASF SE

Inventor： Andreas WOELFERT ,  Michael LORENZ ,  Gerrit WATERS ,  Marcu REBLE ,  Holger FRIEDRICH ,  Andreas WEICKGENANNT ,  Wolfgang GMEINER

IPC: B01D53/86 ,  B01D53/34

CPC classification number: B01D53/8625 ,  B01D53/343 ,  B01D53/8696 ,  B01D2257/402

Abstract: The invention relates to a process for decomposing nitrous oxide from a gas stream (1). comprising: (a) heating the gas stream (1) and splitting the gas stream (1) into at least two partial streams (3, 5) or splitting the gas stream (1) into at least two partial streams (3, 5) and heating the partial streams (3, 5): (b) feeding each of the partial streams (3, 5) into a separate decomposition reactor, wherein each reactor (31) comprises a catalyst: (c) decomposing the nitrous oxide into nitrogen and oxygen in the decomposition reactors to obtain purified streams (13, 15): (d) optionally feeding each purified stream (13, 15) into a unit (11) for decomposing nitrogen dioxide and/or nitrogen monoxide or combining at least two purified streams (13, 15) and feeding the combined purified streams into a unit (11) for decomposing nitrogen dioxide and/or nitrogen monoxide, wherein the catalysts of the decomposition reactors (31) are changed alternatingly and wherein one of the catalysts is changed when the arithmetic mean of the lifetime of the catalysts in the other reactors has reached 25 to 75% of the lifetime of one catalyst.