| 摘要 |
<p>The present invention is a barium-containing alumina with the X-ray pattern of the figure. The alumina may be synthesized by simultaneously adding a polyether or a polyalcohol and an aqueous solution of a water soluble barium carboxylate to an aqueous boehmite sol or suspension to form a gel, the gel having a polyether or polyalcohol content of about 2 wt.% to about 26 wt.%, preferably about 10 wt.% to about 20 wt.%. The gel is then dried and calcined to convert it to an essentially pure barium-containing delta alumina. The alumina may be optionally hydrothermally treated to induce further crystallization. The final product contains about 2 wt.% to about 18 wt.% Ba, preferably about 8 wt.% to about 12 wt.%.</p> |
