发明名称 |
METHOD OF MAKING WALL-FLOW MONOLITH FILTER |
摘要 |
A ceramic honeycomb wall-flow filter is prepared by plugging channels in a ceramic honeycomb comprised of clay by a method comprising the following. First, a mixture comprised of a dispersing liquid and ceramic powder is formed. Second, the mixture is inserted into at least one channel of a green ceramic honeycomb that is comprised of a clay to form a plugged green ceramic honeycomb wherein the dispersing liquid essentially fails to swell the clay. Alternatively, the mixture is inserted into a calcined ceramic honeycomb to form a plugged calcined ceramic honeycomb. Finally, the plugged green or calcined ceramic honeycomb is heated to a temperature sufficient to sinter the plugged green ceramic honeycomb to form a porous sintered plugged ceramic honeycomb. The method is particularly useful for simultaneously making the plugs and discriminating layers in the channels. In particular the method is useful to make wall-flow filter having plugs on at least one end with same composition as the discriminating layer or plugs on each end having different compositions. |
申请公布号 |
WO02085814(A3) |
申请公布日期 |
2003.01.03 |
申请号 |
WO2002US12866 |
申请日期 |
2002.04.23 |
申请人 |
DOW GLOBAL TECHNOLOGIES INC. |
发明人 |
VANCE, FREDRICK, W.;WALLIN, STEN, A. |
分类号 |
F01N3/02;B01D39/14;B01D39/20;B01D46/00;B01D46/24;B01J35/04;B28B11/00;C04B35/185;C04B35/447;C04B35/565;C04B35/584;C04B35/622;C04B35/636;C04B35/66;C04B38/00;C04B38/06;F01N3/022;F01N3/035 |
主分类号 |
F01N3/02 |
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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