Patent ID: 8440586

Claim:
A batch composition for making porous honeycomb ceramic, comprising: base inorganic components comprising: a nano-zeolite powder in an amount from 20 to 80 weight percent of the base inorganic components, and an inorganic filler in an amount from 80 to 20 weight percent of the base inorganic components; and a mixture of at least two pore formers in an amount from 50 to 100 weight percent in superaddition to the base inorganic components; a binder in an amount from 10 to 75 weight percent in superaddition to the base inorganic components; and a metal salt in an amount from 1 to 10 weight percent in superaddition to the base inorganic components, wherein the mixture of at least two pore formers comprise non-crosslinked starch particles and crosslinked starch particles, and the non-crosslinked starch particles have a median particle size of 5 to 25 micrometers and crosslinked starch particles have a median particle size of 30 to 60 micrometers.