Method for manufacturing porous silica crystal

C - Chemistry – Metallurgy – 30 – B

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C30B 29/16 (2006.01) C01B 37/02 (2006.01) C30B 7/10 (2006.01)

Patent

CA 2580391

In a synthetic method for porous silica crystals through a hydrothermal reaction, a method f or synthesizing porous silica crystals with a size of 0.5 mm or larger in high reproducibility and efficiency is provided using a method for manufacturing the porous silica crystals, wherein a high concentration area with silicon is formed as a partial area inside a hydrothermal synthesis vessel, and at least a part of a surface-smoothed bulk material is present in the high concentration area with silicon to perform the hydrothermal reaction, the bulk material comprising a compound containing both silicon and oxygen as a supply source for a part or a whole of the structure composition elements of the porous silica crystals.

L~invention porte sur un procédé de fabrication de cristal poreux de silice, caractérisé en ce qu~il s~agit d~un procédé de synthétisation d~un cristal poreux de silice par une réaction hydrothermique, consistant à former une région ayant une forte concentration de silicium dans une partie d~un récipient de réaction hydrothermique, et à réaliser la réaction hydrothermique tout en faisant en sorte qu~au moins une partie d~un article volumineux comprenant un composé contenant du silicium et de l~oxygène, après exposition à un traitement de lissage de surface, comme source d~alimentation d~une partie ou de tous les éléments constituant le squelette du cristal poreux de silice, soit présente dans la région ci-dessus ayant une concentration élevée de silicium. Le procédé ci-dessus permet la synthèse d~un cristal poreux de silice d~une taille supérieure ou égale à 0,5 mm avec une bonne reproductibilité et une bonne efficacité.

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