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Title: Selective oxidation of olefins over transition metal-exchanged zeolite Y. [Cyclohexen and 1,4-cyclohexadiene]

Abstract

Bis(ethylenediamine)cobalt(II) formed dioxygen adducts in zeolite Y, which were catalytic intermediates in the oxidative dehydrogenation of 1,4-cyclohexadiene to benzene and water. The reaction rate at about 65/sup 0/C was first order with respect to the cobalt-dioxygen complex concentration and the cyclohexadiene partial pressure and zero order with respect to the oxygen partial pressure. The liquid-phase catalytic oxidation of cyclohexene with molecular oxygen over various molybdenum-exchanged Y-type zeolites, including MoHY and MoCoHY, had induction periods of 0-12 hr and yielded products, including cyclohexene oxide, 2-cyclohexen-1-ol, and 2-cyclohexen-1-one; the selectivity for the epoxide was 25% at 50% conversion; a synergistic effect was found between molybdenum and cobalt. Molybdenum-exchanged zeolites were comparable in activity and epoxide selectivity to homogeneous catalysts.

Authors:
Publication Date:
OSTI Identifier:
6053680
Resource Type:
Book
Resource Relation:
Other Information: Thesis (Ph.D.)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; COBALT; CATALYTIC EFFECTS; CYCLOALKENES; OXIDATION; MOLYBDENUM; ZEOLITES; CHEMICAL REACTION KINETICS; CHEMICAL REACTION YIELD; DIENES; EXPERIMENTAL DATA; INDUCTION; MEDIUM TEMPERATURE; REACTION INTERMEDIATES; TRANSITION ELEMENTS; ALKENES; CHEMICAL REACTIONS; DATA; ELEMENTS; HYDROCARBONS; INFORMATION; INORGANIC ION EXCHANGERS; ION EXCHANGE MATERIALS; KINETICS; MATERIALS; METALS; MINERALS; NUMERICAL DATA; ORGANIC COMPOUNDS; POLYENES; REACTION KINETICS; YIELDS; 400301* - Organic Chemistry- Chemical & Physicochemical Properties- (-1987); 400201 - Chemical & Physicochemical Properties

Citation Formats

Dai, P S. Selective oxidation of olefins over transition metal-exchanged zeolite Y. [Cyclohexen and 1,4-cyclohexadiene]. United States: N. p., 1979. Web.
Dai, P S. Selective oxidation of olefins over transition metal-exchanged zeolite Y. [Cyclohexen and 1,4-cyclohexadiene]. United States.
Dai, P S. 1979. "Selective oxidation of olefins over transition metal-exchanged zeolite Y. [Cyclohexen and 1,4-cyclohexadiene]". United States.
@article{osti_6053680,
title = {Selective oxidation of olefins over transition metal-exchanged zeolite Y. [Cyclohexen and 1,4-cyclohexadiene]},
author = {Dai, P S},
abstractNote = {Bis(ethylenediamine)cobalt(II) formed dioxygen adducts in zeolite Y, which were catalytic intermediates in the oxidative dehydrogenation of 1,4-cyclohexadiene to benzene and water. The reaction rate at about 65/sup 0/C was first order with respect to the cobalt-dioxygen complex concentration and the cyclohexadiene partial pressure and zero order with respect to the oxygen partial pressure. The liquid-phase catalytic oxidation of cyclohexene with molecular oxygen over various molybdenum-exchanged Y-type zeolites, including MoHY and MoCoHY, had induction periods of 0-12 hr and yielded products, including cyclohexene oxide, 2-cyclohexen-1-ol, and 2-cyclohexen-1-one; the selectivity for the epoxide was 25% at 50% conversion; a synergistic effect was found between molybdenum and cobalt. Molybdenum-exchanged zeolites were comparable in activity and epoxide selectivity to homogeneous catalysts.},
doi = {},
url = {https://www.osti.gov/biblio/6053680}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1979},
month = {1}
}

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