Apparatus and method for maintaining a stable electrolyte in oxygen analysis
阅读：618发布：2023-04-05
专利汇可以提供Apparatus and method for maintaining a stable electrolyte in oxygen analysis专利检索，专利查询，专利分析的服务。并且A reservoir of electrolyte is placed in communication with the electrolyte of an electrolytic cell, which electrolytic cell is adapted for oxygen analysis. An anode is placed in the reservoir, a cathode is placed in the cell, and a potential applied to generate a current between the cathode and the anode. A pH gradient is established, and the neutralization products formed, such as by the introduction of acid gases such as chlorine and carbon dioxide, migrate to the anode and the reservoir. The neutralization products are emitted from the reservoir and the electrolyte in the cell is maintained in a stable state.，下面是Apparatus and method for maintaining a stable electrolyte in oxygen analysis专利的具体信息内容。
1. IN AN ELECTROLYTIC CELL IN WHICH A COMPONENT INTRODUCED INTO THE CELL IS REDUCED AT ONE CELL ELECTRODE AND OXIDIZED AT THE OTHER CELL ELECTRODE AND WHERE A NEUTALIZATION REACTION OCCURS FORMING NEUTRALIZATION PRODUCTS BECAUSE OF THE INTRODUCTION OF COMPONENTS OTHER THAN THE COMPONENTS TO BE MEASURED, THREREBY REDUCING THE IONIC TRANSFER CAPACITY OF THE ELECTROLYTE, THE IMPROVEMENT WHICH COMPRISES: A. FIRST MEANS TO GENERATE AN ELECTROLYTE CURRENT BETWEEN THE CELL ELECTRODES; B. A RESERVOIR OF ELECTROLYTE IN COMMUNICATION WITH THE ELECTROLYTE OF THE CELL; C. A FIRST ELECTRODE DISPOSED IN THE ELECTROLYTE OF THE RESERVOIR; D. A SECOND ELECTRODE DISPOSED IN THE ELECTROLYTE OF THE CELLE. SECOND MEANS TO GENERATE AN ELECTROLYSIS CURRENT BETWEEN THE FIRST AND SECOND ELECTRODES SAID SECOND MEANS INDEPENDENT OF THE FIRST MEANS WICH CURRENT RESULTS IN A PH GRADIENT BETWEEN FIST AND SECOND ELECTRODES AND WHICH CURRENT EFFECTS THE MIGRATION OF IONIC SPECIES THAT MAY CAUSE NEUTRALIZATION PRODUCTS TO BE FORMED IN THE ELECTROLYTE OF THE CELL TO THE FIRST ELECTRODE, THE ZONE ABOUT THE FIRST ELECTRODE HAVING A CONCENTRATION OF HYDROGEN IONS SUCH THAT THE IONIC SPECIES WHICH TEND TO FORM NEUTRALIZATION PRODUCTS REMAIN SEGREGATED FROM THE ELECTROLYTE OF THE ELECTROLYTIC CELL; AND F. MEANS TO INHIBIT THE BACK DIFFUSION OF SAID IONIC SPECIES FROM THE ZONE ABOUT THE FIRST ELECTRODE TO THE ELECTROLYTE OF THE CELL.
2. The cell of claim 1, wherein the means to inhibit the back diffusion includes at least one conduit between the cell and the reservoir.
3. The cell of claim 1, wherein the electrode in the reservoir is an anode.
4. The cell of claim 1, wherein the electrolyte in the cell is caustic.
5. The cell of claim 1, which includes electrodes catalytically specific for oxygen analysis.
6. A METHOD OF STABILIZING AN ELECTROLYTE IN AN ELECTROLYTIC CELL IN WHICH UNWANTED IONIC SPECIES ARE FORMED DURING AN ELECTROCHEMICAL OPERATION WHICH INCLUDES: A. PROVIDING AN ELECTROLYTIC CELL HAVING A PAIR OF SENSING ELECTRODED DISPOSED THEREIN, THE ELECTRODES SPECIFIC FOR A COMPONENT TO BE ANALYZED IN A FLUID STREAM, THE ELECTRODES COMPLETING A FIRST ELECTROLYTIC PATH; B. PROVIDING A RESERVOIR OF ELECTROLYTE IN COMMUNICATION WITH THE ELECTROLYTE OF THE CELL AND INCLUDING A SECOND PAIR OF ELECTRODES, ONE OF SAID ELCTRODES DISPOSED IN THE RESERVOIR OF ELECTROLYTE OF THE CELL, WHICH PAIR OF ELECPOSED IN THE ELECTROLYTE OF THE CELL, WHICH PAIR OF ELECTRODES PROVIDES A SECOND ELECTROLYTIC PATH, THE FUNCTION OF WHICH PATH IS INDEPENDENT OF THE FUNCTION OF THE FIRST ELECTROLYTIC PATH; C. IMPOSING AN ELECTRICAL CURRENT BETWEEN THE SECOND PAIR ELCTRODES RESULTING IN A PH GRADIENT BETWEEN THE ELECTROLYTE OF THE RESERVOIR AND THE ELECTROLYTE OF THE CELL TO PROVIDE FOR THE MIGRATION OF OTHER IONIC SPECIES WHICH ARE INTRODUCED INTO THE ELECTROLYTE TO THE RESERVOIR WHICH SPCIES DO NOT DIRECTLY AFFECT REACTIONS AT THE SENSING ELCTRODE; AND D. RESTRICTING THE BACK DIFFUSION OF THE UNWANTED IONIC SPECIES FROM THE RESERVOIR INTO THE CELL, WHEREBY THE UNWANTED IONIC SPECIES REMAIN SEGREGATED FROM THE ELECTROLYTE OF THE ELECTROLYTIC CELL.
7. The method of claim 6, which includes: flowing a gaseous stream comprising oxygen and at least one acid gas into the cell, which acid gas forms neutralization products; measuring the amount of oxygen in the stream by an electrochemical operation; flowing the neutralization products into the reservoir; and emitting the neutralization products from the reservoir.
8. The method of claim 7, wherein the acid gases include carbon dioxide and chlorine, and which includes emitting the carbon dioxide by effervescence and emitting the chlorine by evolution.
9. The method of claim 6, wherein the electrolytes are caustic.
10. The method of claim 6, which includes establishing a zone of hydrogen ions in the electrolyte of the reservoir of a different concentration than the hydrogen ions in the bulk electrolyte.
11. The method of claim 6, which includes emitting the ionic species from the reservoir by effervescence.
12. The method of claim 6, which includes emitting the ionic species by evolving said products.
13. The method of claim 6, which includes: segregating the ionic species from the electrolyte of the electrolytic cell; and maintaining the ionic species in a segregated state in the reservoir.
14. A method of stabilizing an electrolyte in an electrolytic cell in which unwanted ionic species are formed during an electrochemical operation which includes: a. providing an electrolytic cell having a sensing electrode pair therein, which electrodes are catalytically specific for oxygen, and further wherein the electrolyte in the electrolytic cell is caustic, the electrodes completing a first electrolytic path; b. providing a reservoir of electrolyte in communication with the electrolyte of the cell including a second pair of electrodes, one of said electrodes disposed in the reservoir of electrolyte and the other of said electrodes disposed in the electrolyte of the cell, which pair of electrodes provides a second electrolytic path, the function of which path is independent of the function of the first electrolytic path; c. imposing an electrical current between the second pair of electrodes resulting in a pH gradient between the electrolyte of the reservoir and the electrolyte of the cell to provide for the migration of other ionic species which are introduced into the electrolyte to the reservoir, which species do not directly affect reactions at the sensing electrode; and d. restricting the back diffusion of the unwanted ionic species from the reservoir into the cell, whereby the unwanted ionic species remain segregated from the electrolyte of the sensing cell.
15. The method of claim 14 which includes establishing a zone of hydrogen ions in the electrolyte of the reservoir of a different concentration than the hydrogen ions in the bulk electrolyte.
16. The method of claim 15 which includes: flowing a gaseous stream comprising oxygen and at least one acid gas into the cell, which acid gas forms neutralization products; measuring the amount of oxygen in the stream by an electrochemical operation; flowing the ionic species which may form neutralization products into the reservoir; and emitting the ionic species which may form neutralization products from the reservoir.
17. The method of claim 16, wherein the acid gases include carbon dioxide and chlorine, and which includes emitting the carbon dioxide by effervescence and emitting the chlorine by evolution.
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