US3716334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Determination of elements in organic compounds
Assignee: Rhone Poulenc SA
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Filing: 1971-02-12
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Granted: 1973-02-13
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Expires: 1991-02-12
Abstract
Abstract Apparatus for the rapid and automatic determination of elements such as halogen and sulphur in organic compounds comprises a closed vessel; means for introducing into said vessel and for supporting in said vessel a sample of said compound to be analyzed; means for filling said vessel with oxygen; means for causing combustion of said sample; means for causing circulation of an absorption liquid in a closed circuit including said vessel; means for determining and detecting said element to be analyzed in said absorption liquid; means for causing said absorption liquid to contact during the circulation thereof the inner surfaces of said vessel and said means for supporting said sample; and means for causing said circulation to cease when said determination is complete.
Inventors
- 👤 M Pont
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:04
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/12; G01N27/00; G01N27/26; G01N27/416; G01N27/42; G01N27/44; G01N31/22; Y; Y10; Y10T; Y10T436/00; Y10T436/18; Y10T436/188; Y10T436/19
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
112 words
A method for the quantitative analysis of an element in an organic compound which comprises converting a known quantity of the said compound into inorganic compounds by combustion on a carrier in a flask containing an absorption liquid in its lower part and oxygen in its upper part, causing the said absorption liquid to circulate in a closed circuit and contact the walls of the said flask and the said carrier thereby absorbing said inorganic compounds, passing said circulated absorption liquid through a zone wherein the element to be analyzed is determined and wherein the end-point of the determination is detected, and causing said determination to cease when said end-point is reached.
Claim 2
Independent Claim
112 words
A method for the quantitative analysis of an element in an organic compound which comprises converting a known quantity of the said compound into inorganic compounds by combustion on a carrier in a flask containing an absorption liquid in its lower part and oxygen in its upper part, causing the said absorption liquid to circulate in a closed circuit and contact the walls of the said flask and the said carrier thereby absorbing said inorganic compounds, passing said circulated absorption liquid through a zone wherein the element to be analyzed is determined and wherein the end-point of the determination is detected, and causing said determination to cease when said end-point is reached.
Claim 3
Dependent Claim
18 words
A method according to claim 1 in which the said element is determined electrolytically in said absorption liquid.
Claim 4
Dependent Claim
17 words
A method according to claim 1 in which the said element is chlorine, bromine, iodine or sulphur.
Claim 5
Dependent Claim
129 words
Apparatus for the quantitative analysis of an element in an organic compound which comprises: a closed vessel; means for introducing into said vessel and for supporting in said vessel a sample of said compound to be analyzed; means for filling said vessel with oxygen; means for causing combustion of said sample; means for causing circulation of an absorption liquid in a closed circuit including said vessel; means for determining said element to be analyzed in said absorption liquid; means for detecting the end-point of the determination in said circulating absorption liquid; means for causing said absorption liquid to contact during the circulation thereof the inner surfaces of said vessel and said means for supporting said sample; and means for causing said determination to cease when said end-point is detected.
Claim 6
Dependent Claim
129 words
Apparatus for the quantitative analysis of an element in an organic compound which comprises: a closed vessel; means for introducing into said vessel and for supporting in said vessel a sample of said compound to be analyzed; means for filling said vessel with oxygen; means for causing combustion of said sample; means for causing circulation of an absorption liquid in a closed circuit including said vessel; means for determining said element to be analyzed in said absorption liquid; means for detecting the end-point of the determination in said circulating absorption liquid; means for causing said absorption liquid to contact during the circulation thereof the inner surfaces of said vessel and said means for supporting said sample; and means for causing said determination to cease when said end-point is detected.
Claim 7
Dependent Claim
19 words
Apparatus according to claim 4 in which means are also provided for heat-exchanging said absorption liquid during circulation thereof.
Claim 8
Dependent Claim
36 words
Apparatus according to claim 4 in which the means for supporting the said sample and the means for causing combustion of the said sample is a platinum wire carrier which can be heated to redness electrically.
Claim 9
Dependent Claim
46 words
Apparatus according to claim 4 for the quantitative analysis of a halogen in which the said means for determining said element comprises two electrodes, one of which is made of silver, and the said means for detecting the end-point of the determination comprises two potentiometric electrodes.
References Cited (Backward Citations)
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 |