Sorpitional carrier materials and a process for the preparation

Details Sorpitional carrier materials and a process for the preparation Sorpitional carrier materials and a process for the preparation

1975-02-27

1976-06-29

Dees, Carl F.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252448, 252455R, 71 62, B01J 2108, B01J 2900, B01J 2906

Patent

active

039666417

ABSTRACT:
The invention relates to a porous carrier rock-based sorptional carrier containing at least one porous carrier rock in an amount not exceeding 95 % by weight, and 5 to 30 % by weight of montmorillonite and optionally illite and/or kaolinite and/or a co-mineral of the latter, with the proviso that a montmorillonite content of at least 5 % by weight is provided for. These carriers have a multiple sorptional pore space, possess a sorption capacity of at least 50 %, and are quasi-spherical in shape.
The above carriers can be prepared, in accordance with the invention, as follows: at least one porous carrier rock is suspended in water either directly or after pre-crushing, then, if not contained originally in the carrier rock in the appropriate amount and ratio, 5 to 30 % by weight, calculated for the amount of the carrier rock, of montmorillonite and optionally illite and/or kaolinite and/or a co-mineral of the latter is added to the suspension as plastic clay mineral also capable of binding in wet state, with the proviso that a montmorillonite content of at least 5 % by weight is provided for the carrier rock, thereafter the total dry material content of the suspension is adjusted to at least 30 % by weight, the suspension is homogenized, is subjected to spray-drying, and, if desired, the obtained particles are fired at 900.degree. to 1300.degree.C.
The carriers according to the invention can be used to great advantages in combination with biologically active substances, such as herbicidal, pesticidal, etc. agents.

REFERENCES:
patent: 1985526 (1934-12-01), Stockton
patent: 2691598 (1954-10-01), Meurice et al.
patent: 2698815 (1955-01-01), Bishop
patent: 2967154 (1961-01-01), Beerman

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