Patent US2811486A successfully refreshed from Google Patents.
US2811486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Side chain chlorination of alkyl benzenes and apparatus therefor
Assignee: Eastman Kodak Co
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Filing: 1954-06-09
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Granted: 1957-10-29
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Expires: 1974-06-09
Abstract
No abstract record available.
Inventors
- 👤 Delbert D Reynolds
- 👤 Charles F H Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:13
CPC Classifications
C; C07; C07D; C07D231/00; C07D231/02; C07D231/10; C07D231/14; C07D231/44; C07D231/52; B; B01; B01D; B01D3/00; B01D3/34; B01D3/40; B01J; B01J14/00; B01J19/00; B01J19/08; B01J19/12; B01J19/122; B01J19/123; B01J19/24; B01J19/2415; C07C; C07C17/00; C07C17/093; C07C17/10; C07C17/14; C07C51/00; C07C51/58; C07C51/60; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00132; B01J2219/00135; Y; Y10; Y10S; Y10S204/00; Y10S204/902; Y10S204/903; Y10S204/912; Y10S204/913
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
THE METHOD OF EFFECTING SIDE CHAIN CHLORINATION OF XYLENE TO FORM THE CORRESPONDING XYLYLENE DICHLORIDE WHICH COMPRISES COUNTERFLOWING AN UPFLOWING STREAM OF SULFURYL CHLORIDE VAPORS AND A DOWNFLOWING LIQUID STREAM OF XYLENE CONTAINING AN ORGANIC PEROXIDE CATALYST THROUGH A REACTION ZONE DEFINED WITHIN A PACKED COLUMN EFFECTIVE TO CAUSE FLOW THROUGH A MULTIPLICITY OF CONSTRICTED FLUID PASSAGES, IRRADIATING THE COUNTERFLOWING REACTANT STREAMS WITH ULTRAVIOLET LIGHT IN AN UPPER PORTION OF SAID REACTION ZONE, HEATING THE LOWER PORTION OF SAID REACTION ZONE TO A TEMPERATURE EFFECTIVE TO VAPORIZE SULFURYL CHLORIDE WITHOUT SUBSTANTIALLY VAPORIZING SAID XYLENE, AND CONTINUOUSLY WITHDRAWING CHLORINATED PRODUCT FROM THE LOWER END OF SAID REACTION ZONE AT A SUFFICIENT RATE TO MAINTAIN THE COLUMN IN AN UNFLOODED CONDITION THROUGHOUT THE PROCESS.
Claim 2
Independent Claim
122 words
THE METHOD OF EFFECTING SIDE CHAIN CHLORINATION OF XYLENE TO FORM THE CORRESPONDING XYLYLENE DICHLORIDE WHICH COMPRISES COUNTERFLOWING AN UPFLOWING STREAM OF SULFURYL CHLORIDE VAPORS AND A DOWNFLOWING LIQUID STREAM OF XYLENE CONTAINING AN ORGANIC PEROXIDE CATALYST THROUGH A REACTION ZONE DEFINED WITHIN A PACKED COLUMN EFFECTIVE TO CAUSE FLOW THROUGH A MULTIPLICITY OF CONSTRICTED FLUID PASSAGES, IRRADIATING THE COUNTERFLOWING REACTANT STREAMS WITH ULTRAVIOLET LIGHT IN AN UPPER PORTION OF SAID REACTION ZONE, HEATING THE LOWER PORTION OF SAID REACTION ZONE TO A TEMPERATURE EFFECTIVE TO VAPORIZE SULFURYL CHLORIDE WITHOUT SUBSTANTIALLY VAPORIZING SAID XYLENE, AND CONTINUOUSLY WITHDRAWING CHLORINATED PRODUCT FROM THE LOWER END OF SAID REACTION ZONE AT A SUFFICIENT RATE TO MAINTAIN THE COLUMN IN AN UNFLOODED CONDITION THROUGHOUT THE PROCESS.
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) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |