CA1177224A CA000410202A CA410202A CA1177224A CA 1177224 A CA1177224 A CA 1177224A CA 000410202 A CA000410202 A CA 000410202A CA 410202 A CA410202 A CA 410202A CA 1177224 A CA1177224 A CA 1177224A Authority CA Canada Prior art keywords hydroxide clay metal ratio equal Prior art date Legal status (The legal status is an …