2579-04-6Relevant articles and documents
Optimization of unsupported CoMo catalysts for decarboxylation of oleic acid
Shim, Jae-Oh,Jeong, Dae-Woon,Jang, Won-Jun,Jeon, Kyung-Won,Kim, Seong-Heon,Jeon, Byong-Hun,Roh, Hyun-Seog,Na, Jeong-Geol,Oh, You-Kwan,Han, Sang Sup,Ko, Chang Hyun
, p. 16 - 20 (2015)
Hydrodeoxygenation (HDO) processes have been developed to remove the oxygenated compounds in lipids. However, the HDO process consumes excess hydrogen. As opposed to the HDO process, decarboxylation does not require hydrogen. In this study, decarboxylation of oleic acid without hydrogen was carried out over unsupported CoMo catalysts. Unsupported CoMo catalysts were prepared by a co-precipitation method. The Co/Mo ratio was systematically varied to optimize unsupported CoMo catalyst. The catalyst properties were studied using various characterization techniques and related to the activity results in decarboxylation.
Petroleum like biodiesel production by catalytic decarboxylation of oleic acid over Pd/Ce-ZrO2 under solvent-free condition
Shim, Jae-Oh,Jang, Won-Jun,Jeon, Kyung-Won,Lee, Da-We,Na, Hyun-Suk,Kim, Hak-Min,Lee, Yeol-Lim,Yoo, Seong-Yeun,Jeon, Byong-Hun,Roh, Hyun-Seog,Ko, Chang Hyun
, p. 163 - 169 (2018)
The Ce/Zr ratio of Pd/Ce-ZrO2 catalysts was systematically changed in order to investigate the effect of oxygen vacancy concentration on their decarboxylation activityunder solvent-free conditions for potential sustainable petroleum like biodiesel production. Pd/Ce0.5Zr0.5O2 exhibited the highest catalytic activity from all other tested catalysts because it contained the highest oxygen vacancy concentration and Pd dispersion, as shown by the X-ray photoelectron spectroscopy, Raman spectroscopy, and CO-chemisorption data. A catalyst deactivation study also showed that both the Pd dispersion and the oxygen vacancy concentration influences the catalytic activity.The catalyst deactivation was found to occur mainly due to Pd sintering, decreases in the BET surface area and Pd dispersion, and partially due to the loss of oxygen vacancies.
Factors affecting reactions of trialkylcyanoborates with imidoyl chlorides/trifluoroacetic anhydride
Jones, Dyfyr Heulyn,Smith, Keith,Elliott, Mark C.,El-Hiti, Gamal A.
, p. 6285 - 6289 (2015/08/03)
Abstract Methods for generating tert-alkyl organoboron species are in high demand as they are invaluable intermediates for the synthesis of quaternary carbon centres. Herein we report investigations into generation of tert-alkyl organoboron species using imidoyl chlorides as reagents in the organoboron cyanidation reaction. Although alkenyl side-products predominate in particularly hindered cases, tert-alkyl organoboron species can be successfully generated for less hindered examples.
REACTIONS EN MILIEU HETEROGENE SOLIDE-LIQUIDE FAIBLEMENT HYDRATE : LA REACTION DE WITTIG DANS LE SYSTEME HYDROXIDES ALCALINS/SOLVANT ORGANIQUE APROTIQUE
Le Bigot, Yves,Delmas, Michel,Gaset, Antoine
, p. 1057 - 1072 (2007/10/02)
The Wittig reaction carried out in a slightly hydrated solid-liquid media constituted by a solid alkaline hydroxide and an organic phase which includes the phosphonium salt and the aldehyde leads easily to the corresponding alkene with very good yields specially with furanic aldehydes.The ylide formation at the interface appears as the most important step of this condensation.
