公开(公告)号：US5837634A

公开(公告)日：1998-11-17

申请号：US974560

申请日：1992-11-12

申请人： Kevin J. McLaughlin ,  Ben L. Decker ,  Mark M. Chavez

发明人： Kevin J. McLaughlin ,  Ben L. Decker ,  Mark M. Chavez

IPC分类号： B01J21/04 ,  B01J23/10 ,  C01F7/02 ,  C04B35/111 ,  C04B35/10

CPC分类号： B01J23/10 ,  B01J21/04 ,  C01F7/026 ,  C04B35/111 ,  C01P2006/12

摘要： A process for preparing a stabilized alumina wherein an aqueous slurry of a precursor boehmite alumina is admixed with an effective amount of a stabilizer such as a water-soluble salt of a polyvalent metal cation of Groups IIA and IIIB of the periodic table, the slurry containing the alumina and the stabilizer being aged at a pH of from about 3 to about 9 and a temperature greater than about 70.degree. C. for a period of time sufficient to convert the greater portion of said alumina to a colloidal sol, the colloidal sol being recovered and calcined to produce a stabilized alumina.

摘要翻译： 一种制备稳定化的氧化铝的方法，其中将前体勃姆石氧化铝的含水浆料与有效量的稳定剂如周期表第IIA和IIIB族的多价金属阳离子的水溶性盐混合， 氧化铝和稳定剂在约3至约9的pH和大于约70℃的温度下老化足以将大部分所述氧化铝转化为胶体溶胶的时间，胶体溶胶为 回收并煅烧以产生稳定的氧化铝。

公开(公告)号：US06531970B2

公开(公告)日：2003-03-11

申请号：US09876468

申请日：2001-06-07

申请人： Kevin J McLaughlin ,  Robert W. Adams

发明人： Kevin J McLaughlin ,  Robert W. Adams

IPC分类号： H03M700

CPC分类号： H03H17/0628

摘要： Methods and apparatus are provided for sample rate conversion in a system including two or more sample rate converters. The method includes the steps of providing an input clock and an output clock to each of the sample rate converters, measuring a sample rate ratio of the clocks in one of the sample rate converters, designated as a master, and controlling each of the sample rate converters with the sample rate ratio measured by the master. The measured sample rate ratio may be transmitted from the master to each of the other sample rate converters. This approach matches the group delays among the sample rate converters.

公开(公告)号：US5593654A

公开(公告)日：1997-01-14

申请号：US392029

申请日：1995-02-22

申请人： Lewis B. Decker, Jr. ,  Kevin J. McLaughlin

发明人： Lewis B. Decker, Jr. ,  Kevin J. McLaughlin

IPC分类号： C01F7/02

CPC分类号： C01F7/021 ,  C01F7/02 ,  C01P2006/12 ,  C01P2006/13 ,  C01P2006/14 ,  C01P2006/16

摘要： A process for preparing stabilized alumina having increased surface area retention at high temperature in which a gel of a boehmite alumina which has been obtained by hydrothermally treating an aqueous mixture of a precursor boehmite alumina having a pH of from about 5 to about 9 for a period of time sufficient to convert the greater portion of the precursor boehmite alumina to a colloidal sol is subjected to working as, for example, by using a sufficient shearing force for a sufficient period of time to produce a worked boehmite alumina which has an increase in pore volume of at least about 30 percent and an increase of median pore radius of at least about 20 percent, a stabilizer being added to the boehmite alumina, the stabilizer being an oxide of a metal such as barium or a metal included in the lanthanide series of metals or a compound of such metals which converts to an oxide at elevated temperatures.

摘要翻译： 一种制备稳定的氧化铝的方法，其在高温下具有增加的表面积保留性，其中通过水热处理pH为约5至约9的前体勃姆石氧化铝的水性混合物一段时间获得的勃姆石氧化铝凝胶 足以将大部分前体勃姆石氧化铝转化为胶体溶胶的时间经受例如通过使用足够的剪切力足够长时间的工作，以产生具有增加的孔的加工勃姆石氧化铝 至少约30％的体积和中值孔半径的增加至少约20％，稳定剂加入到勃姆石氧化铝中，稳定剂是包含在镧系元素中的金属如钡或金属的氧化物 金属或这种金属的化合物，其在升高的温度下转化为氧化物。