Membrane-filter bubble-point test

2008 ◽  
Vol 65 (23) ◽  
pp. 2210-2212 ◽  
Author(s):  
David W. Newton
Keyword(s):  
Membrane Filter ◽  
Bubble Point ◽  
Point Test ◽  
Filter Bubble

scholarly journals Validation of Sterile Filtration of Intrahospital Sterile Preparations: Bubble Point Test.

1994 ◽  
Vol 20 (6) ◽  
pp. 522-529
Author(s):  
SATOSHI OGAWA ◽  
KAORU CHIBA ◽  
SHIGETAKA AKUTSU ◽  
SHUNICHI INAGAKI
Keyword(s):  
Bubble Point ◽  
Sterile Filtration ◽  
Point Test

Comparative Evaluation of Geotextile Pore Sizes Using Bubble Point Test and Image Analysis

2007 ◽  
Vol 30 (3) ◽  
pp. 100663
Author(s):  
L. D. Suits ◽  
T. C. Sheahan ◽  
AH Aydilek ◽  
D D'Hondt ◽  
RD Holtz
Keyword(s):  
Image Analysis ◽  
Comparative Evaluation ◽  
Bubble Point ◽  
Pore Sizes ◽  
Point Test

Identification of acid-insoluble filter-plugging compounds and optimal acid-washing procedures for tubular backpulse pressure filters

TAPPI Journal ◽  
2011 ◽  
Vol 10 (1) ◽  
pp. 17-23
Author(s):  
KEVIN TAYLOR ◽  
RICH ADDERLY ◽  
GAVIN BAXTER
Keyword(s):  
Calcium Sulfate ◽  
Membrane Filter ◽  
Sulfamic Acid ◽  
Xrd Analysis ◽  
Metal Sulfides ◽  
X Ray Diffraction ◽  
X Ray ◽  
Gypsum Formation ◽  
Acid Washing ◽  
Hydrolysis Of

Over time, performance of tubular backpulse pressure filters in kraft mills deteriorates, even with regular acid washing. Unscheduled filter replacement due to filter plugging results in significant costs and may result in mill downtime. We identified acid-insoluble filter-plugging materials by scanning electron microscope/energy-dispersion X-ray spectroscopy (SEM/EDS) and X-ray diffraction (XRD) analysis in both polypropylene and Gore-Tex™ membrane filter socks. The major filter-plugging components were calcium sulfate (gypsum), calcium phosphate (hydroxylapatite), aluminosilicate clays, metal sulfides, and carbon. We carried out detailed sample analysis of both the standard acid-washing procedure and a modified procedure. Filter plugging by gypsum and metal sulfides appeared to occur because of the acid-washing procedure. Gypsum formation on the filter resulted from significant hydrolysis of sulfamic acid solution at temperatures greater than 130°F. Modification of the acid-washing procedure greatly reduced the amount of gypsum and addition of a surfactant to the acid reduced wash time and mobilized some of the carbon from the filter. With surfactant, acid washing was 95% complete after 40 min.

Sign in / Sign up

Export Citation Format

Share Document