Patent US3857904A successfully refreshed from Google Patents.
US3857904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hf alkylation system utilizing alkylate stream reboil
Assignee: Phillips Petroleum Co
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Filing: 1973-05-07
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Granted: 1974-12-31
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Expires: 1993-05-07
Abstract
Abstract A side draw stream from an isostripper to a debutanizer is removed from the isostripper as a liquid stream of normal butane and higher hydrocarbons. The alkylate-containing bottoms fromthe isostripper are used to indirectly heat or reboil the bottom of the debutanizer. Alkylate is recovered from the reboiler line as well as from the debutanizer.
Inventors
- 👤 C Chapman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:23
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/56; C07C2/58; C07C2/62; C07C7/00; C07C7/005; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/12; C07C2527/1206
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
123 words
IN AN HF-ALKYLATION PROCESS WHEREIN ISOPARAFFIN, OLEFIN AND HYDROFLUORIC ACID CATALYSTS ARE REACTED IN A REACTION ZONE TO FORM AN ALKYLATE, WHEREIN THE ALKYLATE CONTAINING HYDROCRBON IS PASSED INTO A FIRST FRACTIONIZATION ZONE TO REMOVE UNREACTED ISPARAFFIN WHEREIN A SIDE DRAW STREAM IS SEPARATED FROM SAID FIRST FRACTIONIZATION ZONE AND WHEREIN SAID SIDE DRAW STREAM IS PASSED INTO A SECOND FRACTIONIZATION ZONE, THE IMPROVEMENT WHICH COMPRISES SEPARATING SAID SIDE DRAW STREAM FROM THE FIRST FRACTIONATION ZONE AS A LIQUID STREAM CONSISTING SUBSTANTIALLY OF NORMAL BUTANE AND HEAVIER HYDROCARBON, SEPARATING NORMAL BUTANE FROM SAID SECOND FRACTIONATION ZONE, AND PASSING THE ALKYLATE-CONTAINING BOTTOMS FROM SAID FIRST FRACTIONATION ZONE INTO THE BOTTOM PORTION OF SAID SECOND FRACTIONIZATION ZONE AS A REBOIL FOR SAID SECOND FRACTIONATION ZONE.
Claim 2
Dependent Claim
123 words
IN AN HF-ALKYLATION PROCESS WHEREIN ISOPARAFFIN, OLEFIN AND HYDROFLUORIC ACID CATALYSTS ARE REACTED IN A REACTION ZONE TO FORM AN ALKYLATE, WHEREIN THE ALKYLATE CONTAINING HYDROCRBON IS PASSED INTO A FIRST FRACTIONIZATION ZONE TO REMOVE UNREACTED ISPARAFFIN WHEREIN A SIDE DRAW STREAM IS SEPARATED FROM SAID FIRST FRACTIONIZATION ZONE AND WHEREIN SAID SIDE DRAW STREAM IS PASSED INTO A SECOND FRACTIONIZATION ZONE, THE IMPROVEMENT WHICH COMPRISES SEPARATING SAID SIDE DRAW STREAM FROM THE FIRST FRACTIONATION ZONE AS A LIQUID STREAM CONSISTING SUBSTANTIALLY OF NORMAL BUTANE AND HEAVIER HYDROCARBON, SEPARATING NORMAL BUTANE FROM SAID SECOND FRACTIONATION ZONE, AND PASSING THE ALKYLATE-CONTAINING BOTTOMS FROM SAID FIRST FRACTIONATION ZONE INTO THE BOTTOM PORTION OF SAID SECOND FRACTIONIZATION ZONE AS A REBOIL FOR SAID SECOND FRACTIONATION ZONE.
Claim 3
Dependent Claim
38 words
The process of claim 1 wherein a first portion of the alkylate product is recovered from said second fractionation zone and a second portion of said product is recovered From said alkylate-containing bottoms from said first fractionation zone.
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) | 1977-12-30 | 1978-07-01 | 1978-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-30 | 1982-07-01 | 1982-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-30 | 1986-07-01 | 1986-12-31 | $7700.00 | Window Closed / Lapsed |