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Compositions for reducing hydrogen sulfide in water treatment systems or other systems that collect and transmit bi-phasic fluids

a technology of water treatment system and hydrogen sulfide, applied in the direction of chemistry apparatus and processes, specific water treatment objectives, other chemical processes, etc., can solve the problems of pipe corrosion, no success or limited success, etc., and achieve the effect of reducing noxious sulfur species

Inactive Publication Date: 2012-04-26
CLEARWATER INT LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The composition effectively reduces H2S levels in both phases, minimizing pipeline corrosion and odor, while maintaining a stable, homogeneous mixture, thus providing a more economical and efficient treatment solution compared to single-action scavenger systems.

Problems solved by technology

Once produced in the biomass or slime layer, the H2S migrates into the aqueous phase, but while in the slime layer, the H2S can and does cause pipe corrosion.
Current treatment methods and composition have focused on removing H2S from the aqueous phase, with either no success or limited success, because the root cause of H2S production was not addressed.
The same problems found in sewages lines is also found in any pipeline through which a bi-phasic mixture is being transmitted and where the flow characteristics in the pipeline or a portion thereof assumes a laminar flow or a reduced flow rate sufficient to permit phase separation with the organic phase adhering to the pipeline walls forming a oil layer.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0029]This example illustrates the preparation of a composition of this invention including the water soluble sulfur scavenger Sulfa-Clear® 8411C, the oil soluble sulfur scavenger Sulfa-Clear® 8849 and the surfactant IGEPAL® CO-630 surfactant, nonyl phenol 9 mole ethoxylate surfactant.

[0030]Preparation

[0031]50 wt. % of Sulfa-Clear® 8411C was added to a vessel with mixing. 20 wt % of IGEPAL® CO-630 was added followed by 10 wt. % Sulfa-Clear® 8849. The resulting composition was mixed for 15 minutes. To this composition was added sufficient water to result in a composition containing 36.92 wt. % water. The resulting composition was mixed for an additional 30 minutes. In this formulation, the amount of Sulfa-Clear® 8849 should not exceed 10 wt. % or the solution becomes cloudy and may separate over time. The water amount should not include an additional 8-10 wt. % of water, because the Sulfa-Clear® 8849 starts to separate out. Of course, these problems can be easily remedied by adding m...

example 2

[0040]This example illustrates the treatment of the same municipal sewage collection system using the composition of Example 1.

[0041]Four 55 gallon drums of the composition of Example 1 were delivered to permit continuous treatment over a 3 week period. The composition of Example 1 was metered into the force main on a continuous basis. Dissolved sulfide levels in the force main were measured at 60 ppm prior to the addition.

[0042]On the first day, 12 gallons of the composition of Example 1 was added. Sulfide levels were reduced to 30 ppm, when measured the next day. On the second day, 8 gallons of the composition of Example 1 was added and dissolved sulfide levels were reduced to 14 ppm. On the third day, the addition rate of the composition of Example 1 was reduced to 4 gallons a day and dissolved sulfide levels were recorded at approximately 5 ppm.

[0043]On subsequent days, the addition rate of the composition of Example 1 was reduced to 3 gallons per day; then to 2 gallons per day....

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Abstract

A composition including a water soluble sulfur scavenger and an oil soluble sulfur scavenger in the presence of sufficient surfactant to produce a homogeneous product for use in pipeline and collection systems in contact with bi-phasic fluids.

Description

RELATED APPLICATION[0001]This application is a divisional application and claims the benefit and priority to U.S. Ser. No. 11 / 677,434, filed 21 Feb. 2007 (Feb. 21, 2007), now U.S. Pat. No. 8,087,248, issued 3 Jan. 2012 (Jan. 3, 2012).BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a method for reducing noxious sulfur species in pipelines using an effective amount of a sulfur scavenger composition, where a fluid flowing through the pipeline includes an aqueous phase and an organic phase and the composition is adapted to reduce noxious sulfur species in both the aqueous phase and the organic or oil phase.[0004]More particularly, the present invention relates to a method for reducing noxious sulfur species in pipeline, especially pipelines with low flow rate, including administering to the pipeline at its start or at one or more locations along is length an effective amount of a sulfur scavenger composition including a water soluble sulf...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C09K3/00
CPCC02F1/68C02F2303/02C02F2101/101C02F1/58C09K8/532
Inventor WANNER, MARKANDERSON, RONWILSON, JR., THOMAS P.
Owner CLEARWATER INT LLC