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US3813451A Expired / Lapsed US ⏱️ 0.0 years remaining

Process for alkylation of aromatic compounds

Assignee: Monsanto Co
•
Filing: 1973-01-16
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Granted: 1974-05-28
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Expires: 1993-01-16
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Abstract

Abstract A PROCESS FOR THE PREPARATION OF MONOALKYLATED AROMATIC COMPOUNDS WHICH COMPRISES PASSING AN ALKYATABLE AROMATIC COMPOUND AND AN OLEFIN HYDROCARBON THROUGH A REACTION ZONE UNDEER ALKYLATING CONDITIONS WHILE MAINTAINING SAID REACTANTS SUBSTANTIALLY COMPLETED IN THE LIQUID PHASE AND EMPLOYING LIQUID REACTANTS AS A QUENCHING MEDIUM FOR TEMPERAURE CONTROL. IF ANY UNATTRACTIVE DILUENT IS PRESENT IN THE REACION MIXTURE OR QUENCHING MEDIUM THE MOLE RATIO OF THE OLEFIN HYDROCARBON TO SUCH INERT HYDROCARBON DILUENT IS MAINTAINED AT LEAST ABOUT FIVE TO ONE. THE PROCESS IS PARTICULARY APPLICABLE TO THE PREPARATION OF CUMENE FROM BENEZE AND PROPYLENE OVER A SOLID PHOSTROPHIC ACID CATALYST.

Inventors

  • 👤 R Canfield
  • 👤 T Neta
  • 👤 R Wiesenborn

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 19:41
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2/70; C07C2527/00; C07C2527/14; C07C2527/16; C07C2527/167; C07C2527/173; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-05-27 1977-11-26 1978-05-28 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-05-27 1981-11-26 1982-05-28 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-05-27 1985-11-26 1986-05-28 $7700.00 Window Closed / Lapsed

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