The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 18, 2001
Filed:
Dec. 06, 1999
James R. Stahlbush, Midland, MI (US);
Kenneth L. Foster, Midland, MI (US);
The Dow Chemical Company, MIdland, MI (US);
Abstract
A water treatment module and process for treating power plant condensate water utilizing a sulfonated ion exchange resin comprising copolymer beads having an interpenetrating polymer network of at least two polymer components wherein at least one of the polymer components is derived from a monomer mixture having a styrenic content less than about 80 molar percent. In one preferred embodiment the multiple polymer components include: (i) a first polymer component derived from a first monomer mixture comprising a monovinylidene monomer having a styrenic content less than about 50 molar percent and (ii) a second polymer component derived from a second monomer mixture comprising: a second monovinylidene monomer having a styrenic content greater than about 50 molar percent and a crosslinking agent. The ratio of the molar percent crosslinking agent of the first polymer component to the second polymer component is less than about 0.7. The present invention is more effective at removing colloidal iron from condensate water, releases fewer total leachables, releases leachables of a lower molecular weight and/or releases leachables having a reduced sulfonate content.