| 摘要 |
<p>Aluminium phosphate binder in an aq. soln. modified by addition of the phosphate(s) of Ca, Mg, Zn, Sr, Pb, Fe and/or Cd (pref. Ca and/or Mg and/or Zn), is improved in that the Al equiv. is 0.7-2.90 w.r.t. the equiv. of the other metal(s), and the equiv. of Al and the other metal(s) w.r.t. the equiv. of phosphoric acid is 1.0-1.8. This binder is used for adhering together particulate zeolite molecular sieves, activated alumina, activated alumina gel, etc. to form bodies used as dry agents, filters, elements removing acid from cooling or air-conditioning systems, etc. The process is simple; the raw materials are abundant and relatively cheap. The porous components are mixed with the binder soln.; the mixt is moulded and fired. The molar ratios of the metals and phosphoric acid must be within the limits defined above to attain the maximal strength of the product. Suitable raw materials include quick or slaked lime, dolomite, zinc dust from zinc smelting, etc.</p> |
