| 摘要 |
<p>Alumina having a narrow pore size distribution in the range 1000 to 2000 </>rA is prepared by precipitating alumina from an aqueous solution of an aluminium salt of a monobasic acid with aqueous ammonia in the presence of micro-crystalline cellulose of 150-300 </>rA particle size, ageing the mixture, separating and calcining. The cellulose particles, employed in amounts up to 100% by weight of the Al2O3 may be aggregated into particles up to 50,000 </>rA diameter.</p> |
