Patent US3864083A successfully refreshed from Google Patents.
US3864083A
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Carbon Detection
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1970-06-26
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Granted: 1975-02-04
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Expires: 1990-06-26
Abstract
Abstract A method for continuously detecting carbon deposition in a catalyst bed. Hence, processes involving reactions of carbonaceous materials can be controlled with reference to carbon deposited, thereby avoiding catalyst deterioration and loss of catalyst activity.
Inventors
- 👤 Norman W Green
- 👤 Richard W Dunning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:15
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/043; B; B01; B01J; B01J19/00; B01J19/0006; B01J19/002; B01J19/0026; B01J37/00; B01J37/34; B01J8/00; B01J8/02; B01J8/06; Y; Y10; Y10T; Y10T436/00; Y10T436/12
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
31 words
The method of claim 1 wherein the conductivity of the catalyst is measured only over a distance of about 2 1/2 feet from the point where the catalyst is first activated.
Claim 2
Dependent Claim
42 words
The method of claim 2 wherein changes in the conductivity of the catalyst are measured by applying an electric potential between an electrode extending axially into the bed from the inlet side and an electrically conductive reactor tube containing the catalyst bed.
Claim 3
Dependent Claim
15 words
The method of claim 1 wherein the process monitored is a catalytic steam reforming process.
Claim 4
Independent Claim
89 words
A method of controlling catalytic chemical process to present and remove coke deposits on the main bed of catalyst comprising: a. continually imposing an electrical potential across said bed of catalyst only over an area sufficient to encompass the point in the bed of catalyst where the catalyst is first at activated temperatures; b. ascertaining changes in the conductivity of said catalyst in said area; c. adjusting said chemical process in response to said change in conductivity whereby prevention and removal of coke deposits on said catalyst is accomplished.
Claim 5
Dependent Claim
21 words
The method of claim 5 wherein said area encompasses a zone of inactive catalyst bordering on a zone of active catalyst.
Claim 6
Dependent Claim
12 words
The method of claim 5 wherein said chemical process is steam reforming.
Claim 7
Dependent Claim
13 words
The method of claim 5 wherein said chemical process is town gas manufacture.
Claim 8
Dependent Claim
13 words
The method of claim 5 wherein said chemical process is synthesis gas production.
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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |