Hydrogenation of acetylene alcohols with novel Pd colloidal catalysts prepared in block copolymers micelles

Autor:	Yu Kosivtsov, Galina N. Demidenko, Esther M. Sulman, Valentina G. Matveeva, Pyotr M. Valetsky, Lyudmila M. Bronstein, Dmitri M. Chernyshov, A Usanov
Rok vydání:	1999
Předmět:	Olefin fiber Process Chemistry and Technology Heterogeneous catalysis Micelle Toluene Catalysis chemistry.chemical_compound Acetylene chemistry Organic chemistry Reactivity (chemistry) Physical and Theoretical Chemistry Selectivity
Zdroj:	Journal of Molecular Catalysis A: Chemical. 146:265-269
ISSN:	1381-1169
Popis:	Hydrogenation of the triple bond of acetylene alcohols to the double one of olefin alcohols (linalool, isophytol) was studied with Pd colloids prepared in polystyrene-poly-4-vinylpyridine micelles in toluene and deposited on Al 2 O 3 . The high selectivity (99.8% for linalool and 99.5% for isophytol) of such catalyst is explained by durable modification of the Pd nanoparticle surface with 4-vinylpyridine units. The activity of the Pd catalyst studied is determined by high reactivity of small Pd nanoparticles. Maximum relative rate was found to be in methanol, but the highest selectivity was achieved in toluene because the latter is a selective solvent for polystyrene-poly-4-vinylpyridine micelles and provides the better accessibility of reactive sites.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::65cc530d5b56686b9ed407299addea0d https://doi.org/10.1016/s1381-1169(99)00100-4 Zobrazit plný text záznamu Full Text from ScienceDirect