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US3776974A Expired / Lapsed US ⏱️ 0.0 years remaining

Linear monoolefin production

Assignee: Shell USA Inc
•
Filing: 1972-02-17
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Granted: 1973-12-04
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Expires: 1992-02-17
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Abstract

Abstract LINEAR A-OLEFINS, OF PRINCIPALY EVEN CARBON NUMBER, PREFERABLY PRODUCED BY OLIGOMERIZATION OF ETHYLENE, ARE CONVERTED TO DETERGENT RANGE LINEAR MONOOLEFINS OF BOTH EVEN AND ODD CARBON NUMBER BY (1) DISPROPORTIONATING THE LINEAR A-OLEFINS WITH 2-BUTENE (2) SEPARATING OF THE RESULTING DISPORPORTIONATION PRODUCT INTO A LOWER LINEAR BOLEFIN FRACTION BELOW THE DETERGENT RANGE OF CARBON NUMBERS AND A HIGHER LINEAR B-OLEFIN FRACTION WITHIN THE DETERGENT RANGE OF CARBON NUMBERS (3) RECOVERING THE HIGHER LINEAR B-OLEFIN FRACTION AS PRODUCT (4) SUBJECTING THE LOWER B-OLEFIN FRACTION TO DISPROPORTIONATION TO YIELD 2-BUTENE AND LINEAR INTERNAL MONOOLEFINS AND (5) SEPARATING AND RECOVERING FROM THE RESULTING LOWER B-OLEFIN DISPROPORTIONATION REACTION MIXTURE THE NORMAL INTERNAL MONOOLEFIN FRACTION WITHIN THE DETERGENT RANGE OF CARBON NUMBER.

Inventors

  • 👤 P Gautier
  • 👤 Der Plas F Van
  • 👤 P Verbrugge

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 04:06
CPC Classifications
C; C07; C07C; C07C6/00; C07C6/02; C07C6/04; C07C11/00; C07C11/02; C07C2521/00; C07C2521/02; C07C2521/04; C07C2523/00; C07C2523/70; C07C2523/76; C07C2523/84; C07C2523/85; C07C2523/88; C07C2523/882; C07C2527/00; C07C2527/06; C07C2527/132; C07C2531/00; C07C2531/02; C07C2531/12; C07C2531/14; C07C2531/26; C07C2531/34

Claims Analysis

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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) 1976-12-03 1977-06-04 1977-12-04 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-12-03 1981-06-04 1981-12-04 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-12-03 1985-06-04 1985-12-04 $7700.00 Window Closed / Lapsed

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