公开(公告)号：EP2499096A4

公开(公告)日：2015-03-04

申请号：EP10830386

申请日：2010-10-07

Applicant: CRISTAL USA INC

Inventor： CHAPMAN DAVID MONROE

IPC: C01G23/047 ,  B01J21/06 ,  C01G23/00

CPC classification number: B01J21/063 ,  B01D53/885 ,  B01D53/9418 ,  B01D2255/20707 ,  B01D2259/804 ,  B01J23/22 ,  B01J23/30 ,  B01J35/002 ,  B01J35/004 ,  B01J35/023 ,  C01G23/047 ,  C01G23/0532 ,  C01P2004/04 ,  C01P2004/51 ,  C01P2004/62 ,  C01P2006/12 ,  C01P2006/14 ,  C01P2006/22 ,  C09C1/3669

Abstract: The present invention is directed to compositions and processes for the production of stable, alkaline, high solids, low viscosity, low surface tension, low flammability, sub-micron titania sols that have minimal offensive odor and methods of their use. Compositions of the present invention include, for example, mixtures of strong and weak organic bases used as dispersants to stabilize the titania sols. The dispersant mixtures have been found to result in relatively high titania solids content, low surface tension, low viscosity suspensions that are low in flammability. Sols produced according to the present invention can be used, for example, in catalytic applications such as catalyst supports for diesel emission control, or in pollutant photocatalyst applications in which it is desirable to have the titania in sol form.

公开(公告)号：EP2673082A4

公开(公告)日：2017-11-29

申请号：EP12744223

申请日：2012-01-25

Applicant: CRISTAL USA INC

Inventor： AUGUSTINE STEVEN MARK ,  CHAPMAN DAVID MONROE ,  WATSON MARK BARRETT

IPC: B01J23/10 ,  B01D53/94 ,  B01J21/06 ,  B01J23/02 ,  B01J23/06 ,  B01J23/14 ,  B01J23/16 ,  B01J23/24 ,  B01J23/30 ,  B01J23/32 ,  B01J23/50 ,  B01J23/70 ,  B01J35/00 ,  B01J37/02 ,  B01J37/10 ,  B82Y30/00

CPC classification number: B82Y30/00 ,  B01D53/9418 ,  B01D2251/2062 ,  B01D2251/2067 ,  B01D2251/208 ,  B01D2255/104 ,  B01D2255/2063 ,  B01D2255/2065 ,  B01D2255/2066 ,  B01D2255/2068 ,  B01D2255/20707 ,  B01D2255/2073 ,  B01D2255/20738 ,  B01D2255/20746 ,  B01D2255/20761 ,  B01D2255/20769 ,  B01D2255/20776 ,  B01D2255/20784 ,  B01D2255/20792 ,  B01D2255/2094 ,  B01D2255/2098 ,  B01D2255/9202 ,  B01J21/063 ,  B01J23/02 ,  B01J23/06 ,  B01J23/10 ,  B01J23/14 ,  B01J23/16 ,  B01J23/24 ,  B01J23/30 ,  B01J23/32 ,  B01J23/50 ,  B01J23/70 ,  B01J35/002 ,  B01J35/006 ,  B01J37/0201 ,  B01J37/0215 ,  B01J37/10

Abstract: A catalyst for removal of NOx from exhaust gas, containing cerium oxide and titanium dioxide, wherein a first portion of the cerium oxide forms at least one agglomerate of cerium oxide crystallites interdispersed in the titanium dioxide, and a second portion of the cerium oxide forms at least one island on a surface of the titanium dioxide, a method for producing the catalyst, a process for selectively reducing NOx levels in an exhaust gas using the catalyst, and an SCR canister containing the catalyst therein.

公开(公告)号：EP2513438A4

公开(公告)日：2014-10-01

申请号：EP10841438

申请日：2010-11-12

Applicant: CRISTAL USA INC

Inventor： CHAPMAN DAVID MONROE

IPC: B01D53/94 ,  B01D53/64 ,  B01J21/06 ,  B01J23/00 ,  B01J23/06 ,  B01J23/22 ,  B01J23/30

CPC classification number: B01J23/22 ,  B01D53/64 ,  B01D53/9418 ,  B01D53/9463 ,  B01D53/9477 ,  B01D2251/2062 ,  B01D2251/2067 ,  B01D2253/104 ,  B01D2253/108 ,  B01D2253/1124 ,  B01D2253/116 ,  B01D2255/2063 ,  B01D2255/2065 ,  B01D2255/20707 ,  B01D2255/20723 ,  B01D2255/2073 ,  B01D2255/20738 ,  B01D2255/20761 ,  B01D2255/20769 ,  B01D2255/20776 ,  B01D2257/60 ,  B01D2258/012 ,  B01J21/063 ,  B01J23/002 ,  B01J23/30 ,  B01J2523/00 ,  F01N3/2066 ,  Y02T10/24 ,  B01J2523/3712 ,  B01J2523/47 ,  B01J2523/69

Abstract: An apparatus and method for treating diesel exhaust gases are described. The system consists of two functionalities, the first being a selective catalytic reduction (SCR) catalyst system and the second being a capture material for capturing catalyst components such as vanadia that have appreciable volatility under extreme exposure conditions. The SCR catalyst component is typically based on a majority phase of titania, with added minority-phase catalyst components comprising of one or more of the oxides of vanadium, silicon, tungsten, molybdenum, iron, cerium, phosphorous, copper and/or manganese vanadia. The capture material typically comprises a majority phase of high surface area oxides such as silica-stabilized titania, alumina, or stabilized alumina, for example.