Method and apparatus for controlling contamination from pipe...

Details Method and apparatus for controlling contamination from pipe... Method and apparatus for controlling contamination from pipe...

2009-07-16

2010-10-26

Anthony, Joseph D (Department: 1796)

Compositions

Oxidative bleachant, oxidant containing, or generative

Plural oxidants

C252S186210, C252S186270, C252S186290, C252S186430, C588S320000, C588S405000, C210S758000, C210S759000

Reexamination Certificate

active

07820069

ABSTRACT:
A combination of a styrene reduction agent and a catalyst that effectively and economically reduces styrene emissions in Cured-In-Place Pipe, closed molding processes. The reduction agent generally comprises a calibrated mixture of salts including sodium chloride plus three persulfate salts: ammonium (APS), potassium (KPS), and sodium (NPS). These ingredients are combined in powder form and are compressed into soluble capsules containing calibrated amounts of the mixture. The capsule(s) may be prescribed through the use of software. The catalyst is hydrogen peroxide (H2O2). A calibrated amount of the styrene reduction agent capsule(s) are added to the cure water prior to starting the boiler equipment for the Cured-In-Place Pipe process, and this is followed by a calibrated amount of the H2O2catalyst in order to reduce the residual monomer content in either process or waste streams.

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