A self disposing of packing is in principle void in the future.
从今以后，在原则上，私自处理包装是无效的。
2
By keeping the total amount of catalyst unchanged, selectivity of cumene and conversion of propylene increases with the void of catalyst packing structure.
在催化剂装填总量不变的前提下，异丙苯的选择性与丙烯的转化率均随催化剂装填结构空隙率的提高而提高。
3
The utility model has larger void ratio and specific surface area and also increases the mass transfer efficiency between gas and liquid when used as packing in the packing tower.