反应详情

Aluminum dodecyloxide was prepared in the same manner as in Example 1. The aluminum dodecyloxide was hydrolyzed to obtain an alumina slurry in the same manner as in Example 1 (Examples 9 and 10). Titanium dioxide was added in the same manner as in Example 3 (Examples 11 and 12). The pH and the solid content of the alumina slurry was adjusted in the same manner as in Example 1. The alumina slurry was aged under the conditions shown in Table 3 to obtain each of eight colloidal sols of alumina hydrate. The resulting colloidal sol of alumina hydrate was concentrated to a solid concentration of 10%. The colloidal sol of the alumina hydrate was spray-dried at a temperature shown in Table 3 to obtain powdery alumina hydrate. The alumina hydrate had a boehmite structure. Properties of the alumna hydrate were measured as described above. The measured properties are shown in Table 3.

1. customto obtain an alumina slurry in the same manner as in Example 1 (Examples 9 and 10)