1560-92-5Relevant articles and documents
Gadgil et al.
, p. 2223 (1968)
Role of support in deoxygenation and isomerization of methyl stearate over nickel-molybdenum catalysts
Qian, Eika W.,Chen, Ning,Gong, Shaofeng
, p. 76 - 85 (2014/04/03)
Microporous SAPO-11 and highly ordered mesoporous AlSBA-15 with different aluminum contents (with Si/Al ratio of 5 and 10) were synthesized. Thus prepared samples were characterized by BET, pyridine-FTIR and NH3-TPD to investigate their structural and acidic properties. The samples were then transformed into bifunctional catalysts by loading with molybdenum and nickel. Their activities were tested in the hydroconversion of methyl stearate using a fixed bed flow reactor system. The sulfided NiMo catalysts exhibited high conversion and deoxygenation activities. High isomerization activities observed for both NiMo/SAPO-11 and NiMo/AlSBA-15 catalysts, similar to the isomerization of light naphtha, was attributed to the acidity of supports. However, the acidity of supports was not the only factor influencing the isomerization of long chain molecules. AlSBA-15 had a large specific surface area that contained more acidic sites inside of its channels, promoting the formation of cracking products; SAPO-11 had a suitable pore size and contained fewer acidic sites inside the pore channels, promoting the formation of mono-branched isomers while suppressing cracking reactions.
Chemistry of the Coccoidea. VIII. Synthesis of the Ancient Dyestuff Kermesic Acid and of Related Anthraquinones
Cameron, Donald W.,Deutscher, D. Jeanne,Feutrill, Geoffrey I.,Griffiths, Peter G.
, p. 2401 - 2421 (2007/10/02)
The insect anthraquinones kermesic acid (3) and laccaic acid D (2) have been synthesized efficiently, as have the plant anthraquinones aloesaponarin-I (4) and -II (33).The syntheses were based on regiospecific Diels-Alder addition of the silyloxy dienes (10) and (11) to simpler quinones.Regiospecificity was controlled by 2(3)-chloro groups in the dienophiles or, for addition to certain naphthoquinones, by a hydroxy group peri to carbonyl.
