公开(公告)号：US5750459A

公开(公告)日：1998-05-12

申请号：US570684

申请日：1995-12-11

申请人： Marcello Marella ,  Letizia Meregalli ,  Michele Tomaselli

发明人： Marcello Marella ,  Letizia Meregalli ,  Michele Tomaselli

IPC分类号： B01J13/00 ,  B01J21/06 ,  B01J23/10 ,  B01J23/46 ,  B01J23/72 ,  B01J37/02 ,  B01J37/03 ,  C01G25/00 ,  C01G25/02 ,  B01J23/63 ,  B01J35/08 ,  B01J101/50

CPC分类号： B82Y30/00 ,  B01J13/00 ,  B01J21/066 ,  B01J37/0215 ,  B01J37/038 ,  C01G25/00 ,  C01G25/006 ,  C01G25/02 ,  C01P2002/60 ,  C01P2004/03 ,  C01P2004/32 ,  C01P2004/64 ,  C01P2006/12 ,  C01P2006/13 ,  C01P2006/14 ,  C01P2006/16 ,  C01P2006/22 ,  C01P2006/80 ,  C01P2006/90

摘要： This invention relates to a process for obtaining pure or mixed oxide zirconia spheres, microspheres or washcoats consisting of: preparing a zirconium solution in water at a concentration, formally expressed as ZrO.sub.2, equal or lower than 400 g/l, starting from a basic zirconium carbonate additioned of conc. nitric acid up to a molar ratio �NO.sub.3.sup.- !/�Zr.sup.4+ ! between 0.8 and 1.1, and eventually preparing one or more solutions of the other oxides when necessary; preparing a sol of zirconium, eventually mixed to other metals, by a thickening agent and, in the case of spheres and microspheres, of a surface active agent too; dripping the sol into an alkaline gelation bath for obtaining gel spheres or microspheres, or sucking the sol into the honeycomb channels in order to obtain the washcoats, with subsequent gelation with gaseous ammonia; ageing the so obtained gel; rinsing with water down to pH=9-10, only in the case of gel spheres or microspheres; drying and calcining.

摘要翻译： 本发明涉及一种获得纯氧化锆或混合氧化锆球体，微球或洗面漆的方法，该方法包括：以ZrO 2的正式表示的浓度制备锆溶液，其浓度等于或低于400g / l，从碱性锆 碳酸盐添加浓缩物 硝酸至0.8〜1.1之间的摩尔比[NO 3 - ] / [Zr 4+]，并在必要时最终制备其它氧化物的一种或多种溶液; 通过增稠剂制备锆的溶胶，最终与其它金属混合，在球体和微球的情况下，也可以制备表面活性剂; 将溶胶滴入碱性凝胶浴中以获得凝胶球或微球，或将溶胶吸入蜂窝通道中以获得洗面漆，随后用气态氨凝胶化; 老化所得凝胶; 用水冲洗至pH = 9-10，仅在凝胶球或微球的情况下; 干燥和煅烧。

公开(公告)号：US6156685A

公开(公告)日：2000-12-05

申请号：US98737

申请日：1998-06-18

申请人： Marcello Marella ,  Letizia Meregalli ,  Michele Tomaselli

发明人： Marcello Marella ,  Letizia Meregalli ,  Michele Tomaselli

IPC分类号： C04B35/622 ,  C04B35/628 ,  C04B35/48 ,  C04B35/624

CPC分类号： C04B35/62855 ,  C04B35/6225 ,  C04B35/624 ,  C04B35/62897 ,  C04B35/6365 ,  C04B2235/3217 ,  C04B2235/3224 ,  C04B2235/3225 ,  C04B2235/3227 ,  C04B2235/3229 ,  C04B2235/3239 ,  C04B2235/3256 ,  C04B2235/3258 ,  C04B2235/3275 ,  C04B2235/3279 ,  C04B2235/3281 ,  C04B2235/3289 ,  C04B2235/408 ,  C04B2235/443 ,  C04B2235/5264 ,  C04B2235/6021

摘要： Zirconia ceramic fibers, for catalytic applications, partially stabilized with yttria by means of a particular sol-gel process, are functionalized with a coating, containing zirconia and, optionally, alumina and/or oxides of Cu, Ni, Co, V, Mo, W, Ce, La, Nd and/or noble metals selected from Rh, Pt, Pd, Ru, Au, mainly obtained with a "dip coating" technique.

摘要翻译： 用于通过特定溶胶 - 凝胶法部分用氧化钇稳定的催化应用的氧化锆陶瓷纤维用包含氧化锆和任选的Cu，Ni，Co，V，Mo的氧化铝和/或氧化物的涂层进行官能化， W，Ce，La，Nd和/或选自Rh，Pt，Pd，Ru，Au的贵金属，主要通过“浸涂”技术获得。