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1. 发明授权

US5089247A Process for producing zirconium-doped pseudoboehmite 失效
标题翻译：生产ZIRCONIUM-DOPED PSEUDOBOEHMITE的方法
公开(公告)号：US5089247A
公开(公告)日：1992-02-18
申请号：US489795
申请日：1990-03-05
申请人： Anh T. Liu , Rudolf Schwarz , Peter Kleinschmit
发明人： Anh T. Liu , Rudolf Schwarz , Peter Kleinschmit
IPC分类号： B01J21/06 , B01J35/10 , B01J37/00 , C01F7/00 , C01F7/34 , C01G25/00
CPC分类号： B01J21/066 , B01J37/0045 , C01F7/00 , C01F7/34 , C01G25/00 , B01J35/1019 , B01J35/1038 , C01P2002/52 , C01P2002/72 , C01P2006/12
摘要： Zirconium-doped pseudoboehmite with the following properties: zirconium content of 0.5 to 10 mol % relative to Al water content of 20 to 35 weight percent total of the anionic impurities less than 0.5 weight percent. It is synthesized by a process wherein zirconium salt is added in calculated quantity to an aqueous aluminum sulfate solution, the resulting mixture is fed simultaneously with a sodium aluminate liquor into a water pool having a temperature of 50.degree. to 100.degree. C., thereby precipitating zirconium-doped alumina gel while a pH of 3.5 to 8 is maintained, the pH of the suspension is adjusted after addition of the aluminum sulfate solution to 8.5 to 10.5 by further addition of sodium aluminate liquor, the suspension is digested if necessary at the pH of 8.5 to 10.5 and the temperature of 50.degree. to 100.degree. C. for a period of up to 24 hours, the formed pseudoboehmite crystals are filtered off, the filter cake is redispersed with water and the suspension is sprayed-dried. By calcining at 700.degree. to 1100.degree. C., preferably at 850.degree. to 950.degree. C., the pseudoboehmite is further processed to zirconium-doped gamma-alumina suitable for automobile exhaust catalysts.

2. 发明授权

US5032378A Zirconium-doped pseudobehmite, process for its production and use thereof 失效
标题翻译：锆掺杂的假木质石，其生产和使用的方法
公开(公告)号：US5032378A
公开(公告)日：1991-07-16
申请号：US296965
申请日：1989-01-13
申请人： Anh T. Liu , Rudolf Schwarz , Peter Kleinschmit
发明人： Anh T. Liu , Rudolf Schwarz , Peter Kleinschmit
IPC分类号： B01J21/06 , B01J35/10 , B01J37/00 , C01F7/00 , C01F7/34 , C01G25/00
CPC分类号： B01J21/066 , B01J37/0045 , C01F7/00 , C01F7/34 , C01G25/00 , B01J35/1019 , B01J35/1038 , C01P2002/52 , C01P2002/72 , C01P2006/12
摘要： Zirconium-doped pseudoboehmite with the following properties: zirconium content of 0.5 to 10 mol % relative to Al water content of 20 to 35 weight percent total of the anionic impurities less than 0.5 weight percent. It is synthesized by a process wherein zirconium salt is added in calculated quantity to an aqueous aluminum sulfate solution, the resulting mixture is fed simultaneously with a sodium aluminate liquor into a water pool having a temperature of 50.degree. to 100.degree. C., thereby precipitating zirconium-doped alumina gel while a pH of 3.5 to 8 is maintained, the pH of the suspension is adjusted after addition of the aluminum sulfate solution to 8.5 to 10.5 by further addition of sodium aluminate liquor, the suspension is digested if necessary at the pH of 8.5 to 10.5 and the temperature of 50.degree. to 100.degree. C. for a period of up to 24 hours, the formed pseudoboehmite crystals are filtered off, the filter cake is redispersed with water and the suspension is sprayed-dried. By calcining at 700.degree. to 1100.degree. C., preferably at 850.degree. to 950.degree. C., the pseudoboehmite is further processed to zirconium-doped gamma-alumina suitable for automobile exhaust catalysts.
摘要翻译：锆掺杂的假勃姆石具有以下性质：锆含量相对于Al含水量为0.5〜10摩尔％，含水量为20〜35重量％，阴离子杂质总量小于0.5重量％。通过其中锆盐以计算量加入到硫酸铝水溶液中的方法合成，将所得混合物与铝酸钠液体同时加入到温度为50-100℃的水池中，由此沉淀锆掺杂的氧化铝凝胶，同时保持3.5至8的pH，通过进一步加入铝酸钠溶液将硫酸铝溶液加入到8.5至10.5之后调节悬浮液的pH，如果需要，将悬浮液在pH 为8.5〜10.5，温度为50〜100℃，长达24小时，滤出形成的假勃姆石晶体，将滤饼再用水分散，将悬浮液喷雾干燥。通过在700〜1100℃，优选在850〜950℃下煅烧，将其进一步处理适合于汽车尾气催化剂的锆掺杂γ-氧化铝的假勃姆石。

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