Chemical upgrading of filters

Details Chemical upgrading of filters Chemical upgrading of filters

2007-06-19

2007-06-19

Del Cotto, Gregory R. (Department: 1751)

Gas separation: processes

Filtering

Through particulate solids

C095S285000, C510S476000, C510S477000, C510S488000

Reexamination Certificate

active

10239713

ABSTRACT:
The invention provides a filter treated with a humectant which may optionally be in combination with a surfactant. The treatment may also include a water soluble rheology modifier to alter the viscosity of water drawn onto the filter by the humectant. A tackifier may also be added. The invention also provides compositions suitable for application to a filter to carry out the treatment. The invention provides a method of “upgrading” a filter using the treatments and compositions described.

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