US3268420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for controlling the loading and heat input of fractionating columns
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1961-12-27
•
Granted: 1966-08-23
•
Expires: 1981-12-27
Abstract
No abstract record available.
Inventors
- 👤 William O Webber
- 👤 Robert L Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:42
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/42; B01D3/4211; B01D3/4238
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
IN THE OPERATION OF A FRACTIONING COLUMNS WHEREIN A FEEDSTOCK TO BE FRACTIONED IS DELIVERED TO THE CLUMN AT AN INTERMEDIATE POINT THEREIN, WHEREIN AN OVERHEAD FRACTION IS TAKEN FROM THE TOP OF THE COLUMN, WHEREIN A BOTTOM FRACTION IS TAKEN FROM THE BOTTOM OF THE COLUMN, AND WHEREIN A PORTION OF THE OVERHEAD FRACTION IS CONDENSED AND THE CONDENSATE IS RETURNED TO THE COLUMN AS REFLUX, THE IMPROVEMENT COMPRISING: REGULATING HEAT INPUT TO THE COLUMN RESPONSIVE TO CHANGE IN TEMPERATURE AT A POINT IN THE COLUMN INTERMEDIATE THE WITHDRAWAL POINTS AND RESPONSIVE TO CHANGES IN THE PRESSURE DIFFERENTIAL BETWEEN SPACED-APART POINTS IN THE COLUMN; EXPONENTIALLY REDUCING THE REGULATION OF THE HEAT INPUT EFFECTED AS THE RESULT OF ANY GIVEN CHANGE IN SAID PRESSURE DIFFERENTIAL AS A FUNCTION OF TIME FROM THE TIME OF SAID GIVEN CHANGE; REGULATING THE LOADING OF THE COLUMN RESPONSIVE TO CHANGES IN SAID PRESSURE DIFFERENTIAL AND RESPONSIVE TO CHANGES IN SAID TEMPERATURE; AND EXPONENTIALLY REDUCING THE REGULATION OF THE LOADING OF THE COLUMN
Claim 2
Dependent Claim
168 words
IN THE OPERATION OF A FRACTIONING COLUMNS WHEREIN A FEEDSTOCK TO BE FRACTIONED IS DELIVERED TO THE CLUMN AT AN INTERMEDIATE POINT THEREIN, WHEREIN AN OVERHEAD FRACTION IS TAKEN FROM THE TOP OF THE COLUMN, WHEREIN A BOTTOM FRACTION IS TAKEN FROM THE BOTTOM OF THE COLUMN, AND WHEREIN A PORTION OF THE OVERHEAD FRACTION IS CONDENSED AND THE CONDENSATE IS RETURNED TO THE COLUMN AS REFLUX, THE IMPROVEMENT COMPRISING: REGULATING HEAT INPUT TO THE COLUMN RESPONSIVE TO CHANGE IN TEMPERATURE AT A POINT IN THE COLUMN INTERMEDIATE THE WITHDRAWAL POINTS AND RESPONSIVE TO CHANGES IN THE PRESSURE DIFFERENTIAL BETWEEN SPACED-APART POINTS IN THE COLUMN; EXPONENTIALLY REDUCING THE REGULATION OF THE HEAT INPUT EFFECTED AS THE RESULT OF ANY GIVEN CHANGE IN SAID PRESSURE DIFFERENTIAL AS A FUNCTION OF TIME FROM THE TIME OF SAID GIVEN CHANGE; REGULATING THE LOADING OF THE COLUMN RESPONSIVE TO CHANGES IN SAID PRESSURE DIFFERENTIAL AND RESPONSIVE TO CHANGES IN SAID TEMPERATURE; AND EXPONENTIALLY REDUCING THE REGULATION OF THE LOADING OF THE COLUMN
References Cited (Backward Citations)
US1942446A
Cited
US2386778A
Cited
US2456398A
Cited
US2816858A
Cited
US2882693A
Cited
US2994643A
Cited
US2963422A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |