Chemical concentration pressure analyzing apparatus and process
OwnerErrol McGillinventor
Life of this patent
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Abstract
An apparatus and method are disclosed for the measurement of hydrogen peroxide concentration from within a textile bleaching bath. The apparatus comprising a sample chamber, a process valve between a source of the solution to be tested and the sample chamber, a reagent valve between a source of reagent and the sample chamber, a pressure measurement tube attached to and extending from the sample chamber, an exhaust valve in communication with the sample chamber, and a pump at a location between the exhaust valve and exhaust device. The process measures hydrogen peroxide concentration by the pressure of the oxygen given off into a known volume as a result of a chemical reaction between the hydrogen peroxide and sodium hypochlorite.
Claims6
An apparatus for the in situ periodic sampling of a solution for the detection of the concentration of a chemical contained in the solution by pressure analysis, said apparatus comprising:
- means defining a sample chamber;
- a process valve at an end of said sample chamber in flow communication with said sample chamber and a source of the solution to be tested;
- an exhaust valve in flow communication with said sample chamber;
- a pump in flow communication with said exhaust valve and further in flow communication with an exhaust means;
- a reagent valve in flow communication with said sample chamber and a source of reagent;
- a pressure measurement tube attached to and extending from said sample chamber to a point above said reagent valve and said exhaust valve;
- and,
- means for measuring pressure within said pressure measurement tube;
- whereby said pump operates when said exhaust valve, said process valve and said reagent valve are open to draw reagent and solution previously sampled to said exhaust means while simultaneously drawing new sample solution and reagent into said sample chamber, thereafter said valves are closed and the pressure of gas given off as a product of a reaction between the chemical and the reagent is measured by said measurement means, providing for the determination of the concentration of the chemical in the solution.
An analytical process for determining the concentration of a peroxide solution by measuring the pressure of oxygen gas given off when hydrogen peroxide reacts with sodium hypochlorite comprising the steps of:
- drawing a sample of peroxide solution into an elongated sample chamber through a fritted glass filter and simultaneously introducing a predetermined volume of sodium hypochlorite solution as a reagent into the chamber;
- measuring the pressure of oxygen gas given off as a product of a chemical reaction between the hydrogen peroxide and the sodium hypochlorite;
- determining the concentration of peroxide from the pressure of said oxygen given off;
- and,
- moving air through said filter from the inside of said chamber outwardly to purge said filter of filtered particles and process contaminants.
Dependencies are inferred from the claim text.