| 摘要 |
<p>1525775 Zeolites DEUTSCHE GOLDUND SILBER-SCHEIDEANSTALT and HENKEL KG AUF AKTIEN 29 March 1976 [2 April 1975] 12571/76 Heading CIA Alkali metal aluminium silicates, having an average grain diameter of < 10 Ám and a content <1% by wt. of particles >45 Ám diameter, are prepared by hydrothermally crystallizing an aluminate/silicate mix, in which the pH of aqueous medium surrounding the crystallization product is adjusted to 9À0-9À9 before or after separation from the mother liquor but prior to drying the product.</p> |
