Boots – shoes – and leggings
Patent
1988-09-30
1990-04-10
Lall, P. S.
Boots, shoes, and leggings
364556, 55 75, 55179, 55 21, B01D 5322, B01D 5304
Patent
active
049166301
ABSTRACT:
The bed tester includes nitrogen and helium sources, a scale, temperature and pressure readouts, and a computer program for determining the available adsorption capacity or activity of molecular sieve beds. Activity is a measure of the condition of the molecular sieve and is defined as the ratio of the weight of nitrogen adsorbed in the bed under test to the weight of nitrogen adsorbed by an equivalent weight of activated molecular seive. To determine the weight of nitrogen adsorbed for the bed under test, a chamber or plenum of known volume is filled with helium, and expanded into the bed. Then the helium is evacuated, and the bed is pressurized with nitrogen. Measured values of pressure, temperature and weight, and known values of volume and density, are used with the ideal gas law (PV=MRT) and other equations in calculations to arrive at the true weight gain due to nitrogen adsorption. Determining the weight of nitrogen adsorbed by an equivalent weight of activated molecular sieve is accomplished by using a set of pure crystal isotherm parameters for 5A and 13X zeolites, which are stored in a table. These parameters were determined by collecting pure crystal-N 2 isotherm data for the zeolite crystals over the temperature range of 14-44 C. The data were then fit to a Sips equation by a least squres technique. The weight percent of water of the molecular sieve is calculated based on correlations with activity determined by a least square technique.
REFERENCES:
patent: 4272265 (1981-06-01), Snyder
patent: 4404005 (1983-09-01), Hamlin et al.
patent: 4455861 (1984-06-01), Alftine
patent: 4516424 (1985-05-01), Rowland
patent: 4519813 (1985-05-01), Hagiwara et al.
patent: 4561287 (1985-12-01), Rowland
patent: 4576616 (1986-03-01), Mottram et al.
patent: 4627860 (1986-12-01), Rowland
patent: 4636226 (1987-01-01), Canfora
patent: 4648888 (1987-03-01), Rowland
patent: 4661124 (1987-04-01), Hamlin et al.
patent: 4673415 (1987-06-01), Stanford
patent: 4684377 (1987-08-01), Haruna et al.
patent: 4685939 (1987-08-01), Kratz et al.
patent: 4725293 (1988-02-01), Gunderson
patent: 4756723 (1988-07-01), Sircar
patent: 4822384 (1989-04-01), Kato et al.
Franz Bernard E.
Lall P. S.
Makay Christopher L.
Singer Donald J.
The United States of America as represented by the Secretary of
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