Patent · US Active

Method for preparing a catalyst-containing ceramic filter for off-gas or exhaust gas cleaning

US10682639B2 · kind B2 · utility

0Cited by

2References

7Claims

0Family size

Assignee

HALDOR TOPSØE A/S · DK

Inventors

Francesco Castellino · Paseo Los Muchachos, DK
Michael Boe · Klampenborg, DK

Key dates

Filing date	Sep 28, 2016
Grant date	Jun 16, 2020
Priority date	—
Expiry date	Sep 28, 2036

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D2258/0291
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A catalyst-containing ceramic dust filter for off-gas or exhaust gas cleaning is prepared by a method comprising the steps of making a water-based impregnation slurry, which comprises a catalytically effective amount of at least one catalytically active metal and an oxide support, to form a catalytically active metal oxide support, impregnating the filter substrate with the impregnation slurry, spraying from the inside to control the amount of liquor while leaving the outer few millimeters of the filter wall dry, and drying the impregnated filter. The impregnated filter is preferably dried by using microwave energy.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.