B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
B01J 20/30 (2006.01) B01D 53/46 (2006.01) B01D 53/62 (2006.01) B01J 20/10 (2006.01) B01J 20/32 (2006.01)
Patent
CA 2592619
The present invention relates to a method of producing a material comprising agglomerated particles of precipitated silica, comprising preparing a solution of at least two metal salts (Me), wherein the metal ions are divalent or polyvalent. A solution of alkali metal (M) silicate having a molar ratio SiO2/M2O of 1 - 4 is prepared. Said solutions are mixed and the mixture stirred, allowing a coagulum to immediately form. The coagulum is rinsed, collected, dewatered, impregnated and processed to provide a material having a dry matter content of >75%, preferably >97%. A material obtainable by the process is also provided.
La présente invention concerne un procédé de production d'un matériau comprenant des particules agglomérées de silice précipitée, avec élaboration d'une solution d'au moins deux sels de métaux (Me), les ions métaux étant divalents ou polyvalents. On élabore une solution de silicate de métal alcalin (M) de 1 4 de rapport molaire SiO2/M2O. On mélange ces solutions et on les agite, ce qui permet à un coagulum de se former immédiatement. On prend ce coagulum et on le lave, le recueille, le déshydrate, l'imprègne et le traite pour donner un matériau à teneur en matière sèche supérieure à 75 %, et de préférence supérieure à 97 %. L'invention concerne également un matériau s'obtenant selon ce procédé.
Abrahamsson Jorgen
Lindahl Lars Gosta
Norberg Sven-Peter
Cassan Maclean
Svenska Aerogel Ab
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