6149-41-3Relevant articles and documents
Immobilization of Carbonylcobalt Catalyst by Poly(4-vinylpyridine) (P4VP) through N→Co Coordination Bonds: The Promotional Effect of Pyridine and the Reusability of Polymer Catalyst
Liu, Yu-Bing,Wang, Yi-Ning,Lu, Hai-Meng,Liang, Shuang,Xu, Bo-Lian,Fan, Yi-Ning
supporting information, p. 3159 - 3164 (2016/11/29)
A carbonylcobalt catalyst, immobilized by poly(4-vinylpyridine) (P4VP) through N→Co coordination bonds, has been prepared by solvothermal method. It has been revealed that the pyridine fragments in the polymer catalyst act not only as promoters to improve the catalytic performance of the carbonylcobalt catalyst for alkoxycarbonylation of ethylene oxide to methyl 3-hydroxypropanoate but also as stabilizers to enhance the reusability of the polymer catalyst. Furthermore, the polymer catalyst could be easily separated by filtration and reused with only a slight loss of catalytic efficiency.
Solvent effect and reactivity trend in the aerobic oxidation of 1,3-propanediols over gold supported on titania: Nmr diffusion and relaxation studies
D'Agostino, Carmine,Kotionova, Tatyana,Mitchell, Jonathan,Miedziak, Peter J.,Knight, David W.,Taylor, Stuart H.,Hutchings, Graham J.,Gladden, Lynn F.,Mantle, Mick D.
, p. 11725 - 11732 (2013/09/12)
In recent work, it was reported that changes in solvent composition, precisely the addition of water, significantly inhibits the catalytic activity of Au/TiO2 catalyst in the aerobic oxidation of 1,4-butanediol in methanol due to changes in diffusion and adsorption properties of the reactant. In order to understand whether the inhibition mechanism of water on diol oxidation in methanol is generally valid, the solvent effect on the aerobic catalytic oxidation of 1,3-propanediol and its two methyl-substituted homologues, 2-methyl-1,3-propanediol and 2,2-dimethyl-1,3-propanediol, over a Au/TiO2 catalyst has been studied here using conventional catalytic reaction monitoring in combination with pulsed-field gradient nuclear magnetic resonance (PFG-NMR) diffusion and NMR relaxation time measurements. Diol conversion is significantly lower when water is present in the initial diol/methanol mixture. A reactivity trend within the group of diols was also observed. Combined NMR diffusion and relaxation time measurements suggest that molecular diffusion and, in particular, the relative strength of diol adsorption, are important factors in determining the conversion. These results highlight NMR diffusion and relaxation techniques as novel, non-invasive characterisation tools for catalytic materials, which complement conventional reaction data. In solvent company: The solvent effect on the aerobic catalytic oxidation of 1,3-propanediol and its two methyl-substituted homologues, 2-methyl-1,3-propanediol and 2,2-dimethyl-1,3-propanediol, over a Au/TiO 2 catalyst has been studied. The results show that diol conversion is significantly lower when water is present in the initial diol/methanol mixture. A reactivity trend within the group of diols was also observed. Copyright
Methods for preparing 3-hydroxy-propionate and 1,3-propylene glycol
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Page/Page column 3-4, (2008/06/13)
The invention disclosed a method for producing 3-hydroxy-propionate and 1,3-propylene glycol by using epoxide as raw material. In the method, a transitional metal cobalt catalyst and a cocatalyst for the hydroesterification reaction among epoxide, carbon monoxide, and alcohol were chosen, and a hydrogenation catalyst for hydrogenating 3-hydroxy-propionate as well as the corresponding process conditions were selected for producing 3-hydroxy-propionate and 1,3-propylene glycol.
