US3666932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means and method for on-line determination of the aromatic, naphthene and paraffin contents of charge oil
Assignee: Texaco Inc
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Filing: 1970-12-30
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Granted: 1972-05-30
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Expires: 1990-12-30
Abstract
Abstract Where Delta T1 and Delta T2 are the temperature drops across the first and second reactors, FA is the aromatic content of the charge oil in percent volume, M is the average molecular weight of the charge oil, T is the weighted average reactor inlet temperature in *F, P is the inlet pressure of the first reactor in psig, H is the hydrogen to hydrocarbon mole ratio and RSV is the reciprocal liquid hourly space velocity. Signals are provided, corresponding to different sensed operating conditions and properties of the charge oil during the reforming operation, to analog computers. The analog computers provide signals in accordance with Equations 1 and 2 which are used to develop outputs corresponding to the aromatic, naphthene and paraffin contents of the charge oil. Outputs corresponding to the naphthene and the paraffin volume percent contents of charge oil being reformed by a catalytic reforming unit, along with an output corresponding to the aromatic volume percent content, are provided during the reforming operation in accordance with the following equations:
Inventors
- 👤 William D White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:13
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/48; G06G7/75; C; C10; C10G; C10G35/00; C10G35/24; G01; G01N; G01N33/00; G01N33/26; G01N33/28; G01N33/2823; H; H03; H03F; H03F3/00; H03F3/04; H03F3/14; Y; Y10; Y10S; Y10S208/00; Y10S208/01
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
20 words
A system as described in claim 1 in which the output corresponds to the naphthene content of the charge oil.
Claim 2
Dependent Claim
53 words
A system as described in Claim 2 further comprising means connected to the chromatograph means and to the output means for providing another output corresponding to the paraffin content of the charge oil in accordaNce with the aromatic content signal, the naphthene content output and the following equation: Paraffin content 100-aromatic content-naphthene content
Claim 3
Dependent Claim
49 words
A system as described in claim 2 in which the temperature signal means provides a signal for each sensed inlet temperature of the reactors and a signal for each sensed outlet temperature of the first two reactors, and the sensed pressure is the sensed pressure in the first reactor.
Claim 4
Dependent Claim
121 words
A system as described in claim 4 in which the output means includes a circuit receiving the inlet temperature signals and direct voltages, each direct current voltage corresponding to a percent of the catalytic reforming units catalyst present in a different reactor, and providing a signal corresponding to the average weighted temperature T of all the inlet temperatures and subtracting means connected to the temperature signed means, one subtracting means receiving the inlet and outlet temperature signals for the first reactor and providing a signal corresponding to the temperature drop Delta T1 across the first reactor, the other subtracting means receiving the inlet and outlet temperature signals and providing a signal corresponding to the temperature drop T2 across the second reactor.
Claim 5
Dependent Claim
94 words
A system as described in claim 5 in which the output means includes computer means connected to the circuit, to the subtracting means, to the chromatograph means, to the pressure sensing means and to the molecular weight-mole ratio means for providing the output in accordance with the T signal, the Delta T1 and Delta T2 signals, the FA signal, the P signal, the charge oil flow rate signal and the H signal, a received direct signal current voltage corresponding to the volume of the catalyst in the catalytic reforming unit and the following equations:
Claim 6
Independent Claim
175 words
A method for determining an ingredient of charge oil being reformed by a catalytic reforming unit having reactors and recycling a portion of the gas product, sensing temperatures of the reactors, sensing the pressure of at least one reactor, sensing the flow rate of the charge oil, sensing the flow rate of the recycle gas, sampling the charge oil, sampling the recycle gas, determining the average molecular weight M of the charge oil in accordance with the sensed flow rate of the charge oil and the charge oil sample, determining the hydrogen to hydrocarbon mole ratio H in accordance with the sensed flow rates of the charge oil and the recycle gas and with the samples of the charge oil and the recycle gas, determining the aromatic content FA of the charge oil in accordance with the charge oil sample and determining the ingredient content of the charge oil in accordance with the sensed temperatures, the sensed pressure, the aromatic content FA the average molecular weight M and the hydrogen to hydrocarbon mole ratio H.
Claim 7
Dependent Claim
23 words
A method as described in claim 7 in which the ingredient content of the charge oil to be determined is the naphthene content.
Claim 8
Dependent Claim
44 words
A method as described in claim 8 further comprising determining the paraffin content of the charge oil in accordance with the aromatic content FA and the naphthene content of the charge oil and the following equation: paraffin content 100 -aromatic content - naphthene content.
Claim 9
Dependent Claim
40 words
A method as described in claim 8 in which the sensed temperatures are the inlet temperatures of the reactors and the outlet temperatures of the first two reactors, and the sensed pressure is the sensed pressure in the first reactor.
Claim 10
Dependent Claim
88 words
A method as described in claim 10 in which the determining of the naphthene content step includes determining the aromatic content FA of the charge oil, determining the temperature drops Delta T1 and Delta T2 Across the first and second reactors, respectively, from the inlet and outlet temperatures of the first and second reactors, weighting the inlet temperature of each reactor in accordance with the percent of the catalytic reforming unit catalyst contained in the reactor, and summing the weighted temperatures to obtain, the average weighted temperature T.
Claim 11
Dependent Claim
60 words
A method as described in claim 11 in which the naphthene content is determined in accordance with the temperature drops Delta T1 and Delta T2, the sensed charge oil flow rate, the hydrogen to hydrocarbon mole ratio H, the average molecular weight M of the charge oil, average weighted inlet temperature T, and the pressure P and the following equations:
References Cited (Backward Citations)
US3497449A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |