Abstract: Processes and systems for recovering promoter-containing compounds, for example, perrhenates, from promoter-containing catalyst substrates, for example, substrates containing precious metals, such as silver, are disclosed. The processes include contacting the substrates with a first solution adapted to remove at least some of the catalyst promoter from the substrates, for example, an oxidizing agent, to produce a second solution containing catalyst promoter, passing the second solution through a porous medium adapted to capture at least some of the catalyst promoter, for example, a ion exchange resin; and passing a third solution, for example, a base solution, through the porous medium to remove at least some of the catalyst promoter from the porous medium and produce a fourth solution containing compounds having a catalyst promoter. Systems adapted to practice these processes are also disclosed.
Type:
Grant
Filed:
December 5, 2007
Date of Patent:
May 29, 2012
Assignee:
Ames Goldsmith Corporation
Inventors:
Michael S. Herman, Michael J. Delsignore, Len D. Spaulding, James E. Phillips, Sr.
Abstract: Processes and systems for recovering promoter-containing compounds, for example, perrhenates, from promoter-containing catalyst substrates, for example, substrates containing precious metals, such as silver, are disclosed. The processes include contacting the substrates with a first solution adapted to remove at least some of the catalyst promoter from the substrates, for example, an oxidizing agent, to produce a second solution containing catalyst promoter, passing the second solution through a porous medium adapted to capture at least some of the catalyst promoter, for example, a ion exchange resin; and passing a third solution, for example, a base solution, through the porous medium to remove at least some of the catalyst promoter from the porous medium and produce a fourth solution containing compounds having a catalyst promoter. Systems adapted to practice these processes are also disclosed.
Type:
Application
Filed:
December 5, 2007
Publication date:
June 11, 2009
Applicant:
AMES GOLDSMITH CORPORATION
Inventors:
Michael S. Herman, Michael J. Delsignore, Len D. Spaulding, James E. Phillips, SR.
Abstract: Spent silver catalysts, from which the recoverable silver has already been stripped, was discovered to be useful for controlling microorganisms such as bacteria and fungi, including microorganisms in fluids such as water, or on surfaces to which coatings containing the stripped, spent silver catalysts are applied, and also in and on products or substrates in which the stripped, spent silver catalysts are incorporated.