发明名称 |
PROCESS FOR THE PRODUCTION OF DDR-TYPE ZEOLITE MEMBRANES |
摘要 |
A process for production of a DDR-type zeolite membrane, which comprises: both a seed crystal-forming step of immersing a porous substrate in a seed crystal-forming raw material solution which contains a DDR-type zeolite powder dispersed therein and performing hydrothermal synthesis to form plural DDR-type zeolite crystal particles on surface of the porous substrate, and a membrane-forming step of immersing the resulting porous substrate with DDR-type zeolite crystal particles on the surface in a membrane-forming raw material solution which is free from DDR-type zeolite powder and performing hydrothermal synthesis to form a DDR-type zeolite membrane on the surface of the porous substrate. According to the process, a dense DDR-type zeolite membrane can be formed, and the vessel used in the synthesis can be prevented from being damaged. |
申请公布号 |
EP2404874(A4) |
申请公布日期 |
2014.01.01 |
申请号 |
EP20100748631 |
申请日期 |
2010.02.15 |
申请人 |
NGK INSULATORS, LTD. |
发明人 |
NIINO, MAKIKO;YAJIMA, KENJI |
分类号 |
C01B37/02;B01D63/06;B01D67/00;B01D69/10;B01D69/12;B01D71/02;C01B39/48 |
主分类号 |
C01B37/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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