公开(公告)号：US11512046B2

公开(公告)日：2022-11-29

申请号：US16499686

申请日：2018-04-04

Applicant: BASF SE

Inventor： Sven Titlbach ,  Andreas Kuschel ,  Carlos Lizandara ,  Stephan A Schunk ,  Joerg Rother ,  Juergen Bechtel ,  Nedko Stefanov Drebov ,  Stefan Maixner ,  Matthias Hinrichs ,  Mohamed Halabi ,  Imke Britta Mueller ,  Michaela Fenyn

IPC: C07C263/14 ,  B01J23/656 ,  B01J23/889 ,  B01J37/02 ,  B01J37/08

Abstract: A process for preparing an aromatic isocyanate by direct carbonylation of a nitro aromatic compound by reacting the nitro aromatic compound with carbon monoxide in the presence of a catalyst, characterized in that the catalyst contains a multi metallic material comprising one or more binary intermetallic phases of the general formula AxBy wherein: A is one or more element selected from Ni, Ru, Rh, Pd, Ir, Pt and Ag, B is one or more element selected from Sn, Sb, Pb, Zn, Ga, In, Ge and As, x is in the range 0.1-10, y in is in the range 0.1-10.

公开(公告)号：US10982132B2

公开(公告)日：2021-04-20

申请号：US16311015

申请日：2017-06-14

Applicant: BASF SE

Inventor： Edward Bohres ,  Radoslaw Kierat ,  Stephan Schunk ,  Carlos Lizandara Pueyo ,  Sven Titlbach ,  Robert Mueller ,  Michael Ludwig Lejkowski

IPC: E21B43/26 ,  C09K8/68 ,  C09K8/70 ,  C09K8/80

Abstract: Method of fracturing a subterranean formation by injecting an aqueous fracturing fluid comprising an aqueous base fluid, a polysaccharide and/or polysaccharide derivative, a crosslinker, which is a water-soluble, layered silicate and a proppant. Aqueous fracturing fluid comprising an aqueous base fluid, a polysaccharide and/or polysaccharide derivative, a crosslinker, which is a water-soluble, layered silicate and a proppant and to the use of water-soluble, layered silicates as crosslinker for aqueous fracturing fluids comprising polysaccharides and/or polysaccharide derivatives.