Process for the preparation of highly permeable cristobalite calcinated diatomaceous filtering agents, and highly permeable cristobalite-free calcinated diatomaceous filtering agents
Номер патента: CA2044040A1
Опубликовано: 21-12-1991
Автор(ы): Pascal Dufour
Принадлежит: Carbonisation et Charbons Actifs CECA SA
Опубликовано: 21-12-1991
Автор(ы): Pascal Dufour
Принадлежит: Carbonisation et Charbons Actifs CECA SA
Реферат: RESUME: PROCEDE POUR L'OBTENTION D'AGENTS FILTRANTS DIATOMITIQUES CALCINES TRES PERMEABLES EXEMPTS DE CRISTOBALITE, ET AGENTS FILTRANTS DIATOMITIQUES CALCINES TRES PERMEABLES EXEMPTS DE CRISTOBALITE. La calcination de la diatomite est effectuée au sein d'une veine gazeuse spiralante à haute température, dans laquelle une anneau de billes réfractaires reste en sustentation, anneau au sein duquel s'opère la calcination et l'agglomération contrôlée des particules diatomitiques. La structure amorphe de la silice est conservée: on obtient ainsi des agents de filtration très perméables pratiquement exempts de cristobalite. SUMMARY: PROCESS FOR OBTAINING HIGHLY PERMEABLE CALCINE DIATOMITICAL FILTERING AGENTS FREE OF CRISTOBALITY, AND HIGHLY PERMEABLE CALCINATED DIATOMITIC FILTERING AGENTS FREE OF CRISTOBALITY. The calcination of the diatomite is carried out within a spiraling gas vein at high temperature, in which a ring of refractory beads remains in lift, ring within which the calcination and the controlled agglomeration of the diatomitic particles takes place. The amorphous structure of the silica is preserved: this gives very permeable filtration agents practically free of cristobalite.
Process for the preparation of highly permeable cristobalite calcinated diatomaceous filtering agents, and highly permeable cristobalite-free calcinated diatomaceous filtering agents
Номер патента: CA2044040C. Автор: Pascal Dufour. Владелец: Carbonisation et Charbons Actifs CECA SA. Дата публикации: 2001-08-21.