Patent US3716333A successfully refreshed from Google Patents.
US3716333A
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Process of and apparatus for thermometric analysis
Assignee: Kali Chemie AG
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Filing: 1970-12-04
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Granted: 1973-02-13
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Expires: 1990-12-04
Abstract
Abstract Process and apparatus for thermometric analysis in which a pump supplies a test solution containing a component, the concentration of which is to be determined, and a reagent solution, adapted to react with the component, to a reaction vessel containing a stirrer and a temperature sensor. The solutions are fed at controlled, constant rates to the reaction vessel through tubing immersed in a constant temperature bath, and the reaction vessel, consisting of a material having a relatively low thermal conductivity, is also immersed in the bath. The temperature in the reaction vessel on mixing the solutions is noted and compared with calibration data.
Inventors
- 👤 G Peuschel
- 👤 F Hagedorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:00
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/20; G01N25/48; Y; Y10; Y10T; Y10T436/00; Y10T436/16
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
158 words
A process for effecting a thermometric analysis comprising the steps of feeding a test solution through tubing located in a thermostatically controlled bath into a reaction vessel; feeding the reagent solution through separate tubing located in the same thermostatically controlled bAth into said reaction vessel, the reagent solution adapted to react, upon mixing, with at least one component of said test solution while causing a temperature change to take place as a result of said reaction, the said test solution and reagent solution entering the reaction vessel at a constant ratio and at an equal and constant temperature and the said reaction vessel being in heat exchange relationship with said bath; mixing said solutions to produce said temperature change by reaction of said reagent solution with said test solution; and measuring said temperature change in said reaction vessel and bath, said temperature change being an indicator of a characteristic of said reaction taking place in said reaction vessel.
Claim 2
Dependent Claim
158 words
A process for effecting a thermometric analysis comprising the steps of feeding a test solution through tubing located in a thermostatically controlled bath into a reaction vessel; feeding the reagent solution through separate tubing located in the same thermostatically controlled bAth into said reaction vessel, the reagent solution adapted to react, upon mixing, with at least one component of said test solution while causing a temperature change to take place as a result of said reaction, the said test solution and reagent solution entering the reaction vessel at a constant ratio and at an equal and constant temperature and the said reaction vessel being in heat exchange relationship with said bath; mixing said solutions to produce said temperature change by reaction of said reagent solution with said test solution; and measuring said temperature change in said reaction vessel and bath, said temperature change being an indicator of a characteristic of said reaction taking place in said reaction vessel.
Claim 3
Dependent Claim
25 words
The process of claim 1 wherein the said bath is maintained at a constant temperature and the temperature change is measured in said reaction vessel.
Claim 4
Dependent Claim
37 words
Process as defined in claim 1, wherein said tubing is composed of a material of high thermal conductivity and said vessel is composed of a material of lower thermal conductivity, allowing a more limited exchange of heat.
Claim 5
Dependent Claim
57 words
Process as defined in claim 1, wherein said tubing is composed of a metal and is sufficiently long so that the temperature of said solutions on reaching said reaction vessel is essentially equal to the temperature of said bath, and said reaction vessel is composed of a material selected from the group consisting of glass and plastics.
Claim 6
Dependent Claim
36 words
Process as defined in claim 1, wherein said temperature change is compared with data derived in the calibration of said process, thereby determining the value of said characteristic of said reacting component of said test solution.
Claim 7
Dependent Claim
24 words
Process as defined in claim 5 wherein said comparison is carried out automatically, and said data are in the form of a calibration curve.
Claim 8
Dependent Claim
21 words
Process as defined in claim 1 wherein said test solution and said reagent solution are fed continuously to said reaction vessel.
Claim 9
Dependent Claim
29 words
Process as defined in claim 1 wherein said reagent solution is fed continuously to said reaction vessel and said test solution is automatically fed discontinuously to said reaction vessel.
Claim 10
Dependent Claim
27 words
Process as defined in claim 1 wherein said reaction between said reagent solution and said test solution produces a precipitate and the resulting temperature change is determined.
Claim 11
Dependent Claim
17 words
Process as defined in claim 1 wherein said reagent solution and said test solution are highly concentrated.
Claim 12
Dependent Claim
37 words
Process as defined in claim 1 wherein the concentration of potassium in a test solution is determined by feeding said test solution containing a potassium salt, and a reagent solution containing sodium perchlorate to said reaction vessel.
Claim 13
Dependent Claim
55 words
Process as defined in claim 1 wherein the concentration of magnesium in a test solution is determined by feeding said test solution made alkaline with ammonia and containing a magnesium salt, and said reagent solution containing a salt selected from the group consisting of ammonium dihydrogen phosphate and sodium dihydrogen phosphate to said reaction vessel.
Claim 14
Dependent Claim
38 words
Process as defined in claim 1 for determining the phosphate content of a test solution by feeding a phosphate-containing test solution and a reagent solution made alkaline with ammonia and containing a magnesium compound to said reaction vessel.
References Cited (Backward Citations)
US3160477A
Cited
US3276843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |