公开(公告)号：US20250011539A1

公开(公告)日：2025-01-09

申请号：US18709867

申请日：2022-11-16

Applicant: BASF SE

Inventor： Veronika Wloka ,  Thomas Heidemann ,  Ines Lottenburger

IPC: C08G65/20 ,  B01J21/16 ,  B01J35/40 ,  B01J35/50

Abstract: A process makes polytetrahydrofuran, polytetrahydrofuran copolymers, or the mono- or diesters thereof by polymerizing tetrahydrofuran and any comonomers over shaped catalyst bodies. The catalyst bodies include an acid-activated sheet silicate, where the shaped catalyst bodies have the shape of trilobes. A cross section of the trilobes is bounded by three convex curves that each make contact with a circle of diameter d that circumscribes the cross section and have three points of intersection within said circle. A distance a from any two points of intersection is 0.5 to 0.65 times the diameter d of the circle that circumscribes the cross section.

公开(公告)号：US10662141B2

公开(公告)日：2020-05-26

申请号：US16340478

申请日：2017-10-09

Applicant: BASF SE

Inventor： Armin Lange De Oliveira ,  Ines Lottenburger ,  Christian Bechtold ,  Thomas Heidemann

IPC: C07C209/72 ,  C07C211/36 ,  C07C209/84 ,  C07C209/86

Abstract: Process for hydrogenating toluenediamine (TDA) tar containing TDA and high boilers relative to TDA, including the step of contacting the toluenediamine tar with a heterogeneous hydrogenation catalyst comprising at least one metal selected from the group consisting of Ni, Co, Ru, Pd, Pt on at least one catalyst support selected from the group consisting of carbon, TiO2 and ZrO2, and with hydrogen under hydrogenating conditions.