US3867475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isoparaffin alkylation
Assignee: Texaco Inc
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Filing: 1973-03-21
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Granted: 1975-02-18
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Expires: 1993-03-21
Abstract
Abstract A strong acid catalyzed alkylation process wherein an isoparaffin is alkylated with an alkylating agent such as olefin hydrocarbon, alkyl sulfates, in the liquid phase, at a superatmospheric pressure and a temperature in the range of from below zero to about 100*F., and wherein gaseous carbon dioxide is dissolved in the strong acid catalyst.
Inventors
- 👤 John H Estes
- 👤 Edward L Cole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:49
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/56; C07C2/58; C07C2/62; C07C2527/00; C07C2527/02; C07C2527/03; C07C2527/053; C07C2527/054
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
158 words
IN AN ALKYLATION PROCESS WHEREIN ISOPARAFFIN HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF ISOBUTANE, ISOPENTANE AND MIXTURES THEREOF IS ALKYLATED WITH AN ALKYLATING AGENT SELECTED FROM THE GROUP CONSISTING OF PROPYLENE, BUTYLENES, PENTYLENES, THEIR SULFATES, AND MIXTURES THEREOF IN THE LIQUID PHASE, IN THE PRESENCE OF AN ACID CATALYST SELECTED FROM THE GROUP CONSISTING OF SULFURIC ACID, FLUOROSULFONIC ACID, AND MIXTURES THEREOF AT A TEMPERATURE IN THE RANGE OF ABOUT ZERO TO ABOUT 100*F AND A SUPERATMOSPHERIC PRESSURE, THE IMPROVEMENT WHICH COMPRISES: A. TREATING SAID ACID CATALYST WITH CARBON DIOXIDE TO FORM AN ACID CATALYST HAVING A WEIGHT RATIO OF CARBON DIOXIDE TO ACID OF AT LEAST 0.1/100 AT A TEMPERATURE IN THE RANGE OF ABOUT ZERO TO ABOUT 100*F AND A SUPERATMOSPHERIC PRESSURE IN THE RANGE OF FROM ABOUT 50 PSIG TO ABOUT 1000 PSIG, AND B. ALKYLATING SAID ISOPARAFFIN HYDROCARBON WITH SAID ALKYLATING AGENT IN THE PRESENCE THE CARBON DIOXIDE TREATED ACID CATALYST OF STEP (A).
Claim 2
Dependent Claim
158 words
IN AN ALKYLATION PROCESS WHEREIN ISOPARAFFIN HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF ISOBUTANE, ISOPENTANE AND MIXTURES THEREOF IS ALKYLATED WITH AN ALKYLATING AGENT SELECTED FROM THE GROUP CONSISTING OF PROPYLENE, BUTYLENES, PENTYLENES, THEIR SULFATES, AND MIXTURES THEREOF IN THE LIQUID PHASE, IN THE PRESENCE OF AN ACID CATALYST SELECTED FROM THE GROUP CONSISTING OF SULFURIC ACID, FLUOROSULFONIC ACID, AND MIXTURES THEREOF AT A TEMPERATURE IN THE RANGE OF ABOUT ZERO TO ABOUT 100*F AND A SUPERATMOSPHERIC PRESSURE, THE IMPROVEMENT WHICH COMPRISES: A. TREATING SAID ACID CATALYST WITH CARBON DIOXIDE TO FORM AN ACID CATALYST HAVING A WEIGHT RATIO OF CARBON DIOXIDE TO ACID OF AT LEAST 0.1/100 AT A TEMPERATURE IN THE RANGE OF ABOUT ZERO TO ABOUT 100*F AND A SUPERATMOSPHERIC PRESSURE IN THE RANGE OF FROM ABOUT 50 PSIG TO ABOUT 1000 PSIG, AND B. ALKYLATING SAID ISOPARAFFIN HYDROCARBON WITH SAID ALKYLATING AGENT IN THE PRESENCE THE CARBON DIOXIDE TREATED ACID CATALYST OF STEP (A).
Claim 3
Dependent Claim
62 words
The process of claim 1 wherein the treating step (a) temperature is in the range of about 20*F to about 75*F, the pressure is in the range of about 50 psig to about 1000 psig, and the acid catalyst is contacted with carbon dioxide in a weight ratio of carbon dioxide to acid in the range of about 0.3/100 to about 5/100.
Claim 4
Dependent Claim
23 words
The process of claim 2 wherein treated acid catalyst from step (a) contains from about 0.3 to about 0.8 weight percent carbon dioxide.
Claim 5
Dependent Claim
27 words
The process of claim 3 wherein isoparaffin reactant is isobutane and the alkylating agent is selected from the group consisting of propylene, butylenes, pentylenes and mixtures thereof.
Claim 6
Dependent Claim
12 words
The process of claim 4 wherein the acid catalyst is sulfuric acid.
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) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |