Patent US3998903A successfully refreshed from Google Patents.
US3998903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylation with separate butene streams including isobutylene
Assignee: Honeywell UOP LLC
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Filing: 1976-01-12
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Granted: 1976-12-21
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Expires: 1996-01-12
Abstract
Abstract A process for producing an alkylation reaction product from an isoparaffin and an olefinic reactant containing 1-butene, 2-butene and isobutylene by fractionating the olefinic reactant into a 2-butene fraction and a separate 1-butene and isobutylene fraction. The 2-butene is charged to an HF alkylation reaction zone with isobutane. The mixture is heated by the endothermic reaction, and the fraction comprising 1-butene and isobutylene is then added to the unitary reaction zone. It is possible to alkylate these olefins at conditions which are close to the optimum conditions, using a single reactor vessel, which operates at different temperatures without the necessity for heat exchange means.
Inventors
- 👤 Jay E. Sobel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:12
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/56; C07C2/58; C07C2/62; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/12; C07C2527/1206; Y; Y10; Y10S; Y10S585/00; Y10S585/909; Y10S585/91
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
111 words
A process for alkylating an isoparaffin with a stream comprising 2-butene and a separate stream comprising 1-butene and isobutylene which comprises a. passing at least a portion of the isoparaffin in admixture with the 2-butene stream and HF acid catalyst to an upstream portion of a reactor wherein the 2-butene reacts with the isoparaffin in an exothermic reaction which increases the temperature of the reactants, acid, and alkylate, b. charging to a downstream portion of the reactor a stream comprising 7-butene and isobutylene, c. separating a hydrocarbon phase comprising alkylate products and unreacted isoparaffins; from HF catalyst phase, and d. separating said alkylate products from said hydrocarbon phase of step (c).
Claim 2
Dependent Claim
111 words
A process for alkylating an isoparaffin with a stream comprising 2-butene and a separate stream comprising 1-butene and isobutylene which comprises a. passing at least a portion of the isoparaffin in admixture with the 2-butene stream and HF acid catalyst to an upstream portion of a reactor wherein the 2-butene reacts with the isoparaffin in an exothermic reaction which increases the temperature of the reactants, acid, and alkylate, b. charging to a downstream portion of the reactor a stream comprising 7-butene and isobutylene, c. separating a hydrocarbon phase comprising alkylate products and unreacted isoparaffins; from HF catalyst phase, and d. separating said alkylate products from said hydrocarbon phase of step (c).
Claim 3
Dependent Claim
12 words
Process of claim 1 wherein the reactor is a single, elongated vessel.
Claim 4
Dependent Claim
9 words
Process of claim 1 wherein the reactor operates adiabatically.
Claim 5
Dependent Claim
35 words
Process of claim 1 wherein the isoparaffin reactant is isobutane, and the isobutane is supplied in a molar ratio equivalent to 2:1 to 24:1, based upon the total amount of olefin charged to the reactor.
Claim 6
Dependent Claim
17 words
Process of claim 1 wherein the acid to hydrocarbon ratio in the reactor is 1:1 to 2:1.
Claim 7
Dependent Claim
24 words
Process of claim 1 wherein the temperature difference between said upstream portion and said downstream portion of the reactor is 1° to 10° C.
Claim 8
Dependent Claim
16 words
Process of claim 1 wherein additional isoparaffin is charged to said downstream portion of the reactor.
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) | 1979-12-21 | 1980-06-21 | 1980-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-21 | 1984-06-21 | 1984-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-21 | 1988-06-21 | 1988-12-21 | $7700.00 | Window Closed / Lapsed |