Authors: Kshudiram Mantri, Ryo Nakamura, Yasuyuki Miyata, Kenichi Komura, Yoshihiro Sugi
Abstract: Some typical multi-valent metal salt hydrates, such as chloride, nitrate, sulfate, and acetate
of Fe3+, Al3+, Ga3+, In3+, ZrO2+, HfO2+, Zn2+, Co2+, Ni2+, Mn3+, Cr3+, and Cu2+ have catalytic activities
for the esterification of saturated and unsaturated fatty acids and alcohols. Supporting these metal salt
hydrates on ordered mesoporous silica such as MCM-41 enhanced the catalytic activity of the
esterification. The esters of C10-C18 normal acid and alcohol were obtained in high yield by some of
supported metal salt hydrates on MCM-41; however, the yield of the esters decreased with their chain
length of acids and alcohols although the activities depended on type of metal salt hydrates. The
catalyst is recyclable although some loss of activity was observed.
2317
Authors: Yu Ping Liu, Wei Guan, Zhi Wei Miao, Bao Guo Sun
Abstract: Benzyl 4-ethyloctanoate was synthesized by the reaction of 4-ethyloctanoyl chloride with benzyl alcohol, and its synthesis conditions were optimized. The yield of benzyl 4-ethyloctanoate was about 93%. Based on the synthesis of benzyl 4-ethyloctanoate, phenethyl 4-ethyloctanoate, phenylpropanol 4-ethyloctanoate and cinnamyl 4-ethyloctanoate were prepared. The odor evaluations indicate that these four new ester compounds have floral and sweet note. These ester compounds have relatively high molecular weights and can be used as fixing agent to prolong the fragrance compounds lifetime.
1111
Authors: Li Juan Chen, Tao Feng, Peng Fei Wang, Qing Quan Liu
Abstract: amino- pyridinium salts of mono-substiuted Keggin-polyoxometalate were synthesized and the catalytic performance the oxidation of benzyl alcohol to benzaldehyde under solvent-free conditions with hydrogen peroxide was examined. The influences of the composition of hybrid catalyst and mole ratio of H2O2 to benzyl alcohol were discussed, under the testing conditions of 70 oC, catalyst load 0.3 g, benzyl alcohol 2 mL, 30% H2O2 6mL, 5 h, 2-N-(2-pyrindinemethyl) -aminopyridinium salt of FeII substituted phosphotungstate (5b)4HPW11FeO39 exhibited the best activity, the conversion of benzyl of 95.4% with high selectivity of 98% was achieved, aminopyridine component in hybrid catalyst act as a counterion of polyoxometalate anion as well as a ancillary ligand, the interactions between organic counterion and polyoxometalate anion involve the electrostatic bond NH3+…Fe-POM as well as dative bond pyridine-N→Fe-POM, both affect the redox reactivity of mono-substituted polyoxometalte.
132
Authors: Dong Mei Zhao, Xue Peng Liu
Abstract: The sulfonated Petroleum coke is used to synthesize n-propyl alcohol(N-PROPYL ALCOHOL) by hydration of ethylene oxide(EO) in chemical engineering and the catalyst of sulfonated Petroleum coke (SPC) is studied. The effect of reactive temperature on the activity of SPC is greatest when reactive temperature goes up，the activity of SPC is quickly enhanced，but when temperature exceeds a certain range, the activity of SPC will reduce; And the activity of SPC will become stronger along with reactive pressure rise，when pressure exceeds a certain value，selectivity of N-PROPYL ALCOHOL will decrease; Also，increasing airspeed will weaken the activity of SPC. The conversion rate of EO reaches 98-100%
85
Authors: Hui Min Yang, Xiao Hui Guo, Chun Hua Yuan, Jin Yan Liu, Wen Xiu He
Abstract: Preparation of carbon supported nanometal catalysts were realized through the carbonization of metal precursor doped carboxymethyl cellulose under nitrogen condition. This carbon supported nanometal catalyst exhibited good activity in the reductive amination of amine. The results suggested a promising one-pot route based on economical and sustainable biomass towards the development of value carbon materials as effective catalyst for C-N bond synthesis reaction.
119
