US4053281A
Expired / Lapsed
US
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Method and apparatus for determining organic carbon in sulfureous compounds
Assignee: Rosemount Inc
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Filing: 1975-01-31
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Granted: 1977-10-11
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Expires: 1995-01-31
Abstract
Abstract Measured sample quantities of sulfureous matter are introduced into a sealed chamber where the samples are pyrolyzed to form sulfur dioxide and sulfur trioxide gases and to oxidize organic substances to form carbon dioxide gas. The gases are then passed through a free sulfur-absorbing packing and into a scrubbing zone wherein transition metal amine complex is used to remove sulfureous compounds without reaction with the carbon dioxide gas. The scrubbed gases are then analyzed to determine the carbon dioxide content thereof.
Inventors
- 👤 Melvin Keith Carter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:15
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/12; Y; Y10; Y10T; Y10T436/00; Y10T436/18; Y10T436/23; Y10T436/25; Y10T436/25125
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
143 words
A process for determining trace quantities of organic carbon in sulfureous mixtures and compounds comprising the steps of: a. introducing small predetermined sample quantities of sulfureous matter into a first zone of a sealed chamber; b. heating the introduced matter in the first zone to a temperature sufficient to decompose the matter to form sulfur dioxide and sulfur trioxide gases and to oxidize organic substances in the matter to form carbon dioxide gas; c. conveying aforementioned gases from the first zone to subsequent zones in the chamber; d. scrubbing the gases from the first zone in a scrubbing zone by the usage of a transition metal amine complex which reacts to remove sulfureous compounds from the gases without reaction with carbon dioxide gas; and e. analyzing the gases which exit from the scrubbing zone to determine the carbon dioxide content of the gases.
Claim 2
Dependent Claim
143 words
A process for determining trace quantities of organic carbon in sulfureous mixtures and compounds comprising the steps of: a. introducing small predetermined sample quantities of sulfureous matter into a first zone of a sealed chamber; b. heating the introduced matter in the first zone to a temperature sufficient to decompose the matter to form sulfur dioxide and sulfur trioxide gases and to oxidize organic substances in the matter to form carbon dioxide gas; c. conveying aforementioned gases from the first zone to subsequent zones in the chamber; d. scrubbing the gases from the first zone in a scrubbing zone by the usage of a transition metal amine complex which reacts to remove sulfureous compounds from the gases without reaction with carbon dioxide gas; and e. analyzing the gases which exit from the scrubbing zone to determine the carbon dioxide content of the gases.
Claim 3
Dependent Claim
23 words
A process according to claim 1 wherein the introduced matter in the first zone is heated to a temperature ranging from 600°-900° C.
Claim 4
Dependent Claim
17 words
A process according to claim 1 wherein the transition metal amine complex consists of copper amine sulfate.
Claim 5
Dependent Claim
27 words
A process according to claim 1 wherein said transition metal amine complex is selected from the group consisting of sulfates of copper, chromium, manganese, iron, and cobalt.
Claim 6
Dependent Claim
25 words
A process according to claim 1 wherein heating of the introduced matter in the first zone is conducted in the presence of an inert gas.
Claim 7
Dependent Claim
27 words
A process according to claim 1 wherein heating of the introduced matter in the first zone is conducted in the presence of a refractory metal oxide catalyst.
Claim 8
Dependent Claim
24 words
A process according to claim 6 wherein the refractory metal oxide catalyst is selected from the group consisting of copper-oxide, manganese-dioxide, vanadium-pentoxide, and cobalt-oxide.
Claim 9
Dependent Claim
14 words
A process according to claim 1 wherein the introduced matter includes a sulfureous acid.
Claim 10
Dependent Claim
13 words
A process according to claim 8 wherein the sulfureous acid includes sulfuric acid.
Claim 11
Dependent Claim
49 words
A process according to claim 1 further including the step of cooling the gases from said first zone to a temperature ranging from 105° C. to 350° C. in a second zone and removing free sulfur therefrom on a sulfur-removing packing before passing the gases to a scrubbing zone.
Claim 12
Dependent Claim
21 words
A process according to claim 10 wherein the temperatures maintained in said second zone range from 105° C. to 250° C.
Claim 13
Dependent Claim
17 words
A process according to claim 10 wherein the sulfur-absorbing packing disposed within the second zone is silver.
Claim 14
Dependent Claim
27 words
A process according to claim 10 wherein the sulfur-absorbing packing is selected from the group consisting of silver, tin, lead, cobalt, nickel, zinc, cadmium, manganese, and iron.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-10 | 1981-04-11 | 1981-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-10 | 1985-04-11 | 1985-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-10 | 1989-04-11 | 1989-10-11 | $7700.00 | Window Closed / Lapsed |