Title:
METHOD FOR PRODUCING ALKALI-FREE GLASS
Document Type and Number:
WIPO Patent Application WO/2014/077114
Kind Code:
A1
Abstract:
The present invention is a method for producing an alkali-free glass, the method including the following: a step for melting a glass raw material and collecting exhaust gas; a step for cooling the exhaust gas by bringing the exhaust gas into contact with a cooling liquid; a step for adding at least one compound selected from among the group consisting of CaCO3, Ca(OH)2 and (Ca,Mg)CO3 to the cooled exhaust gas and recovering from the exhaust gas a powder having an average particle diameter (D50) of 30-100 µm by using a dust collection member; and a step of bringing the exhaust gas from which the powder has been recovered into contact with Mg(OH)2 and water so as to recover, as a recovered liquid, a component contained in the exhaust gas. The recovered liquid is used as the cooling liquid in the step for cooling the exhaust gas.
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Inventors:
ANDO RYOTA (JP)
HATA MASAYUKI (JP)
ISHIHARA HIROTAKE (JP)
HATA MASAYUKI (JP)
ISHIHARA HIROTAKE (JP)
Application Number:
PCT/JP2013/079170
Publication Date:
May 22, 2014
Filing Date:
October 28, 2013
Export Citation:
Assignee:
ASAHI GLASS CO LTD (JP)
International Classes:
C03B5/16; B01D53/46; B01D53/50; B01D53/68; B01D53/77; C03C3/091; C03C3/093
Domestic Patent References:
| WO2009072612A1 | 2009-06-11 | |||
| WO2012161274A1 | 2012-11-29 |
Foreign References:
| JP2004238236A | 2004-08-26 | |||
| JP2011255361A | 2011-12-22 |
Attorney, Agent or Firm:
HAMADA Yuriko et al. (JP)
Yuriko Hamada (JP)
Yuriko Hamada (JP)
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