US2768985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of meta-dialkylbenzenes
Assignee: California Research LLC
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Filing: 1951-06-23
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Granted: 1956-10-30
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Expires: 1971-06-23
Abstract
No abstract record available.
Inventors
- 👤 Maurice J Schlatter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:45
CPC Classifications
C; C07; C07C; C07C15/00; C07C15/02; C07C6/00; C07C6/08; C07C6/12; C07C6/126
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
THE METHOD OF PRODUCING META-ALKYL TERTIARY-BUTYL BENZENES WHICH COMPRISES CONTACTING A MONO-ALKYL BENZENE HYDROCARBON WITH A MOLECULAR EXCESS OF A TERTIARYBUTYLATING AGENT UNDER ALKYLATING CONDITIONS TO PRODUCE ALKYL DI-TERTIARY-BUTYL BENZENE, FRACTIONALLY DISTILLING THE REACTION PRODUCT TO SEPARATE A 1-ALKYL 3,5-DI-TERTIARY-BUTYL BENZENES FRACTION, CONTACTING THIS FRACTION WITH A MOLAR EXCESS OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF BENZENE, TOULENE, ORTHO-XYLENE, META-XYLENE AND PHENOL UNDER MILD ALKYLATING CONDITIONS INCLUDING A TEMPERATURE BELOW ABOUT 70* C. TO PRODUCE A REACTION PRODUCT CONTAINING A META-ALKYL TERTIARY-BUTYLBENZENE AND SUBSTANTIALLY FREE OF PARA-ALKYL TERTIARY-BUTYLBENZENES AND FRACTIONALLY DISTILLING THE REACTION PRODUCT TO SEPARATE A FRACTION CONSISTING ESSENTIALLY OF META-ALKYL TERTIARY-BUTYL BENZENE.
Claim 2
Independent Claim
106 words
THE METHOD OF PRODUCING META-ALKYL TERTIARY-BUTYL BENZENES WHICH COMPRISES CONTACTING A MONO-ALKYL BENZENE HYDROCARBON WITH A MOLECULAR EXCESS OF A TERTIARYBUTYLATING AGENT UNDER ALKYLATING CONDITIONS TO PRODUCE ALKYL DI-TERTIARY-BUTYL BENZENE, FRACTIONALLY DISTILLING THE REACTION PRODUCT TO SEPARATE A 1-ALKYL 3,5-DI-TERTIARY-BUTYL BENZENES FRACTION, CONTACTING THIS FRACTION WITH A MOLAR EXCESS OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF BENZENE, TOULENE, ORTHO-XYLENE, META-XYLENE AND PHENOL UNDER MILD ALKYLATING CONDITIONS INCLUDING A TEMPERATURE BELOW ABOUT 70* C. TO PRODUCE A REACTION PRODUCT CONTAINING A META-ALKYL TERTIARY-BUTYLBENZENE AND SUBSTANTIALLY FREE OF PARA-ALKYL TERTIARY-BUTYLBENZENES AND FRACTIONALLY DISTILLING THE REACTION PRODUCT TO SEPARATE A FRACTION CONSISTING ESSENTIALLY OF META-ALKYL TERTIARY-BUTYL 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) | 1959-10-30 | 1960-04-30 | 1960-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-30 | 1964-04-30 | 1964-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-30 | 1968-04-30 | 1968-10-30 | $7700.00 | Window Closed / Lapsed |