The results showed that the optimal conditions for synthesis of benzyl acetate were: the molar ratio of acetic acid to benzyl alcohol was 2∶1,the amount of the water carrier was 40%,the amount of the catalyst was 3.5%,and reaction time was 6 h.
Isoamyl isovalerate was synthesized through esterification reaction by using isovaleric acid and isoamyl alcohol as raw materials and nano-H4SiW12O40/SiO2 as catalyst, the influencing factors in the reaction were studied, and the results showed that the esterification rate could reach 98.6 % under the conditions of the ratio of alcohol-acid 1.4∶1, the use level of catalyst 5 %, and the reaction time 1.5 h.
Synthesis of isoamyl laurate from lauric acid and isoamyl alcohol with nanometer H3PW12O40 / SiO2 as catalyst is studied, the results showed that nanometer H3PW12O40/ SiO2 was a good catalyst for synthesizing isoamyl laurate, the oplimal conditions were found as follows: molar ratio of lauric acid to isoamyl alcohol was 1∶5, the weight of catalyst was 5%, the reaction time was 2h, yield was about 99.1%.
The optimum reaction conditions were: the molar ratio of ethyl acetoacetate to ethylene glycol was 1:1.8,the quantity of catalyst was equal to 2% ethyl acetaoacetate,amount of cyclohexane was 20mL,and the reaction time was 3h.
The main process parameters were optimized by orthogonal test. The optimized operation conditions were: reaction temperature 100 ℃,reaction time 15 min,mole ration of β-naphthol to ethanol 1∶5.5,and the dosage of catalyst 2.5 g. Under these conditions,the yield of β-naphtyl ethyl ether was above 70%.
3, 7-Dimethy1-1, 6-octadiene (1) [Dihydromyrcene] reacts with formic acid in the presence of solid acid catalyst and gives a mixture of 1-(3, 3-dimethylcyclohexyl) ethyl formate (3) and 3,3,7-trimethylcycloheptyl formate(4).
A new environmentally friendly catalyst, H4SiW12O40-polyaniline (PAn), was prepared, and n-butyraldehyde 1,2-propanediol acetal was synthesized from n-butyraldehyde and 1,2-propanediol in the presence of H4SiW12O40-PAn.
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The influence factors of the synthesis were discussed, and the best reaction conditions were found: the molar ratio of n-butyraldehyde to 1,2-propanediol is 1:1.5, the amount of catalyst used is 1.2% of feed stock, and the reaction time is 1.0 h.
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H4SiW12O40-PAn is an excellent catalyst for synthesizing n-butyraldehyde 1,2-propanediol acetal, and the yield can reach more than 95.2%.
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The partial intermediate products were absorbed on TiO2 surface, which resulted in catalyst deactivation.
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But when it was irradiated under UV illumination or solar irradiation for some time, the catalyst could be reused without loss of catalytic activity.
A new method-chloroacetic acid method-for borneol synthesis was studied. The products obtained were in good quality containing more than 96% of borneol and no iso-borneol. High yield of borneol and good conversion rate of pinene have been observed at optimum temperature (70℃) in the presence of catalyst. Esterification can proceed steadily without danger of explosion which is the drawback of oxalic acid method.
This paper deals with the polymerization process of high softening point terpene resin. Through laboratory experiments, a complex catalytic system has been selected and suitable reaction conditions determined, providing some reliable data for further industrial testing. With rich superfine turpentine from Pinus massoniana as raw material and methylbenzene as reaction solvent, terpene resins (Softening point>110) in light colour (Gardner's color< 6 ) can be obtained by cationic polymerization in the temperat...
This paper reports the PTC synthetic method of Phthalic anhydride of bis(3-ch1oro-2-hydroxypropyl) ester Using the quarternary ammonium salt as a catalyst the product is directly synthesized form phthalic anhydrid, water and epoxy chloropropane, with an esterification yield more then 95%. The paper studies the effects on the yield of the various factors e. g. reaction temperature, time, catalyst rate, etc.