公开(公告)号：US3714313A

公开(公告)日：1973-01-30

申请号：US3714313D

申请日：1971-01-27

Applicant: KAISER ALUMINIUM CHEM CORP

Inventor： BEIDING W ,  EMERSON R ,  WILLIAMS R

IPC: B01J20/08 ,  B01J35/10 ,  C04B35/10 ,  B01J11/44 ,  C01F7/02

CPC classification number: B01J35/10 ,  B01J20/08 ,  B01J35/1019 ,  B01J35/1042 ,  C04B35/10

Abstract: Gel-derived crystalline alumina containing at least 40 percent pseudoboehmite and having low cationic and anionic impurity levels is partially dehyrated to an LOI of 22-34 percent, ground to at least 85 percent minus 325 mesh, shaped into spheres by conventional agglomerating devices while adding sufficient water to rise the total water content to 52-65 percent. These shaped spheres, without any ageing treatment, are then heated to a temperature in the range of 350*-650*C for a time necessary to produce the desired strength. The resultant spheres are strong and have a high total porosity, at least 20 percent of which consists of pores in the 120-800 A size range. They are useful as desiccants, active alumina and catalyst supports.

Abstract translation: 含有至少40％假勃姆石并且具有低阳离子和阴离子杂质水平的凝胶衍生的结晶氧化铝被部分脱氢至22-34％的LOI，经过常规聚集装置研磨至至少85％至325目，成球形，同时加入 足够的水将总含水量提高到52-65％。 然后将这些成形的球体进行任何时效处理，然后将其加热至350-650℃的温度，达到所需强度所需的时间。 所得的球体是强的并且具有高的总孔隙率，其至少20％由120-800A尺寸范围内的孔组成。 它们可用作干燥剂，活性氧化铝和催化剂载体。