US2870229A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of meta-diisopropyl benzene
Assignee: Shell Development Co
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Filing: 1956-11-01
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Granted: 1959-01-20
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Expires: 1976-11-01
Abstract
No abstract record available.
Inventors
- 👤 Keizer Adrianus De
- 👤 Christiaan P Van Dijk
- 👤 Arthur A Gips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:44
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2521/00; C07C2521/12; Y; Y10; Y10S; Y10S585/00; Y10S585/949; Y10S585/954
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A PROCESS FOR THE PRODUCTION OF META-DIISOPROPYL BENZENE WHICH COMPRISES CONTACTING A COMPOUND SELECTED FROM THE GROUP CONSISTING OF BENEZENE AND CUMENE WITH PROPYLENE IN THE PRESENCE OF SILICA-ALUMINA CRACKING TYPE CATALYST AT A TEMPERATURE IN THE RANGE BETWEEN 160* AND 250*C. AND AT A LIQUID HOURLY SPACE VELOCITY BETWEEN 0.1 AND 4 V./V./HR. THE HIGER SPACE VELOCITIES BEING EMPLOYED ONLY AT THE HIGER TEMPERATURES IN THE DEFINED RANGE. TO PRODUCE A TOTAL PRODUCT MISTURE CONTAINING LESS THAN 10% ORTHO-DIISOPROPYL BENEZENE AND RECOVERING FROM SAID PRODUCT MIXTURE BY FRACTIONAL DISTILLATION A META-DIISOPROPYL BENEZENE FRACTION CONTAINING LESS THAN 10% ORTHO-DIISOPROPYL BENZENE.
Claim 2
Dependent Claim
100 words
A PROCESS FOR THE PRODUCTION OF META-DIISOPROPYL BENZENE WHICH COMPRISES CONTACTING A COMPOUND SELECTED FROM THE GROUP CONSISTING OF BENEZENE AND CUMENE WITH PROPYLENE IN THE PRESENCE OF SILICA-ALUMINA CRACKING TYPE CATALYST AT A TEMPERATURE IN THE RANGE BETWEEN 160* AND 250*C. AND AT A LIQUID HOURLY SPACE VELOCITY BETWEEN 0.1 AND 4 V./V./HR. THE HIGER SPACE VELOCITIES BEING EMPLOYED ONLY AT THE HIGER TEMPERATURES IN THE DEFINED RANGE. TO PRODUCE A TOTAL PRODUCT MISTURE CONTAINING LESS THAN 10% ORTHO-DIISOPROPYL BENEZENE AND RECOVERING FROM SAID PRODUCT MIXTURE BY FRACTIONAL DISTILLATION A META-DIISOPROPYL BENEZENE FRACTION CONTAINING LESS THAN 10% ORTHO-DIISOPROPYL BENZENE.
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) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |