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Separation method for potassium from aqueous koh solutions

a potassium hydroxide and aqueous technology, applied in the direction of water/sewage treatment by neutralisation, alkali metal carbonates, alkali metal halide purification, etc., can solve the problems of industrial waste water removal of certain harmful chemicals, continue to plague industry and government, etc., and achieve the effect of efficient precipitation and greater separation

Inactive Publication Date: 2014-02-20
TENNESSEE BOARD OF REGENTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is an improved process for separating potassium from a solution of potassium hydroxide. The process involves two steps, and the first step is similar to a previous process but is more efficient in separating potassium. The second step results in a very efficient precipitation of potassium. This process is useful for industries that generate concentrated potassium hydroxide solutions as waste, and the end product, potassium carbonate sesquihydrate, is useful for industries that use potassium carbonate.

Problems solved by technology

In an increasingly environmental conscious world, one problem that has continued to plague industry and government is how to remove certain harmful chemicals from industrial waste water.

Method used

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  • Separation method for potassium from aqueous koh solutions
  • Separation method for potassium from aqueous koh solutions
  • Separation method for potassium from aqueous koh solutions

Examples

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example 1

EXAMPLE 1

[0031]KOH Waste Stream Treatment

[0032]From a pressurized CO2 cylinder, via a manifold, three batches (200 mL, 1 L, and 3 L) of a waste KOH sample were bubbled for three hours. This step of the treatment process was exothermic. From room temperature, the temperatures of the batches rose to 41°, 39° and 31° C. for the 200 mL, 1 L and 3 L volumes, respectively. The pH of the original waste stream was about 13, and after bubbling with CO2 the final pH of the treated batches was between about 7 and about 8. In the original method, which was developed with an aqueous potassium hydroxide solution of 50% concentration, a majority of the potassium would separate as a crystalline solid material (potassium carbonate sesquihydrate) at this step. Here, using an actual waste sample, no crystalline materials were separated at this point. This is reasonable and expected because the original method was developed using an aqueous potassium hydroxide solution of 50% concentration. By contrast...

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Abstract

The process described herein demonstrates a more efficient and effective way to remove certain chemicals from industrial waste water. Specifically, the invention set forth demonstrates a method comprised of at least two steps in which up to 96% of potassium can be removed from an aqueous solution comprising potassium hydroxide.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This Non-Provisional Patent Application, filed under 35 U.S.C. 5 111(a), claims the benefit under 35 U.S.C. 5 119(e)(1) of U.S. Provisional Patent Application No. 61 / 742,572, filed under 35 U.S.C. 5 111(b) on 14 Aug. 2012, and which is hereby incorporated by reference in its entirety.STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT[0002]The invention was made by an agency of the United States Government or under a contract with an agency of the United States Government. The name of the U.S. Government agency and the Government contract number are: B&W Technical Services Y-12, contract 4300074126.BACKGROUND[0003]1. Field[0004]The invention disclosed herein the method for separating potassium from aqueous potassium hydroxide solution.[0005]2. Description of Related Art[0006]In an increasingly environmental conscious world, one problem that has continued to plague industry and government is how to remove certain harmful chemic...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C22B26/10
CPCC22B26/10C02F1/66C02F2001/5218C02F2101/10C01D7/07
Inventor SHARPE, JR., LONNIECAPPADONA, TAYLOR ANTHONYPAINTER, ROGER DALEBYL, THOMAS DUANESIDDIQUEE, TASNEEM AHMEDVERCRUYSSE, KOEN PETER
Owner TENNESSEE BOARD OF REGENTS
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