Patent ID: 9682337
Date: 2017-06-20
CPC Classifications: B01D,B01J,C04B,F01N,Y02T

Claim:
1. A method for producing a ceramic honeycomb filter comprising the steps of preparing a cordierite-forming material containing talc, silica, an alumina source and kaolin; classifying the cordierite-forming material by passing the cordierite-forming material through a sieve having opening diameters of 250 μm or less to form a classified cordierite-forming material; blending the classified cordierite-forming material and a pore-forming material to prepare a moldable material; extruding said moldable material to form a honeycomb-shaped molding; and plugging the predetermined flow paths of said honeycomb-shaped molding to form said ceramic honeycomb filter; said silica having a median diameter of 15-58 μm, said talc having a median diameter of 10-25 μm and a morphology index of 0.77-0.84, said kaolin having a median diameter of 1.5-7.5 μm and a cleavage index of 0.9-0.95, said cleavage index being a value expressed by I said alumina source having a median diameter of 1.5-6 μm, and said pore-forming material comprising pore-forming material particles having a median diameter of 30-70 μm.