US2949494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylation of hydrocarbons utilizing evaporative cooling
Assignee: Graham Engineering Corp
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Filing: 1954-08-16
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Granted: 1960-08-16
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Expires: 1974-08-16
Abstract
No abstract record available.
Inventors
- 👤 David H Putney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:14
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/56; C07C2/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
IN A PROCESS OF EFFLUENT REFRIDGERATION AS APPLIED TO THE ALKYLATION OF PARAFFINIC HYDROCARBONS BY OLEFINIC HYDROCARBONS WHEREIN THE REACTION IS MAINTAINED UNDER SUFFICENT PRESSURE TO MAINTAIN THE REACTANTS IN LIQUID PHASE, A MIXTURE OF HYDROCARBONS AND CATALYST IS WITHDRAWN FROM THE REACTION STEP, THE CATALYST IS SEPARATED FROM THE HYDROCARBON PHASE IN A SEPARATING STEP AND PRESSURE IS REDUCED ON THE HYDROCARBON PHASE TO REFRIGERATE IT VAPORIZE EXCESS VOLATILE HYDROCARBONS, THE ALKYLATE BEING NONEVAPORABLE UNDER THE PRESSURES AND TEMPERATURES EXISTING IN THE SYSTEM, THE IMPROVEMENT WHICH COMPRISES DIRECTLY PASSING THE REFRIGERATED HYDROCARBON PHASE INCLUDING BOTH LIQUID AND VAPOR WITHOUT SEPARATION, IN INDIRECT HEAT EXCHANGE WITH THE MIXTURE OF HYDROCARBONS AND CATALYST IN THE REACTION STEP TO LOWER THE TEMPERATURE OF THE MATERIALS UNDERGOING REACTION AND VAPORIZE FURTHER VOLATILE HYDROCARBONS, THEN SEPARATING THE
Claim 2
Dependent Claim
133 words
IN A PROCESS OF EFFLUENT REFRIDGERATION AS APPLIED TO THE ALKYLATION OF PARAFFINIC HYDROCARBONS BY OLEFINIC HYDROCARBONS WHEREIN THE REACTION IS MAINTAINED UNDER SUFFICENT PRESSURE TO MAINTAIN THE REACTANTS IN LIQUID PHASE, A MIXTURE OF HYDROCARBONS AND CATALYST IS WITHDRAWN FROM THE REACTION STEP, THE CATALYST IS SEPARATED FROM THE HYDROCARBON PHASE IN A SEPARATING STEP AND PRESSURE IS REDUCED ON THE HYDROCARBON PHASE TO REFRIGERATE IT VAPORIZE EXCESS VOLATILE HYDROCARBONS, THE ALKYLATE BEING NONEVAPORABLE UNDER THE PRESSURES AND TEMPERATURES EXISTING IN THE SYSTEM, THE IMPROVEMENT WHICH COMPRISES DIRECTLY PASSING THE REFRIGERATED HYDROCARBON PHASE INCLUDING BOTH LIQUID AND VAPOR WITHOUT SEPARATION, IN INDIRECT HEAT EXCHANGE WITH THE MIXTURE OF HYDROCARBONS AND CATALYST IN THE REACTION STEP TO LOWER THE TEMPERATURE OF THE MATERIALS UNDERGOING REACTION AND VAPORIZE FURTHER VOLATILE HYDROCARBONS, THEN SEPARATING THE
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) | 1963-08-16 | 1964-02-15 | 1964-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-16 | 1968-02-15 | 1968-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-16 | 1972-02-15 | 1972-08-16 | $7700.00 | Window Closed / Lapsed |