Patent ID: 9675919
Date: 2017-06-13
CPC Classifications: B01D

Claim:
1. A method of treating a particulate filter comprising channels, the method comprising: introducing a work fluid into the channels of the particulate filter, wherein at least 2.5 g/l of ash is disposed in the form of ash plugs in one or more ash-loaded inlet channels prior to the introduction of the work fluid, wherein the ash plugs are packed by contact with the work fluid, and wherein a density of ash in the ash plugs after contact with the work fluid is greater than a density of ash in the respective ash plugs prior to contact with the work fluid; holding the work fluid in the channels of the particulate filter at a target temperature below a boiling point of the work fluid for a predetermined time period; and vaporizing the work fluid to remove the fluid from the channels, wherein the ash plugs remain in the channels after the work fluid is removed.