The comprehensive utilization of iso-citronelene can solve the problem of resource waste, which is conducive to environmental protection and green economic development. In this paper, based on the alkene-ester-alcohol...The comprehensive utilization of iso-citronelene can solve the problem of resource waste, which is conducive to environmental protection and green economic development. In this paper, based on the alkene-ester-alcohol synthesis route, through the design of a reasonable orthogonal test scheme, the production process of isocitronelene hydration esterification under acid environment was studied in detail, to explore the optimal process conditions. The results showed that the optimum process was as follows: iso-citronelene: organic acid = 1:2, catalyst was sulfuric acid, dosage was about 2%~5% of iso-citronelene, reaction time was 5 hours. Under the condition of iso-citronelene + acetic acid, the synthetic yield of the hydration esterification of iso-citronelene was over 85%, and the content of alcohol in the product was > 90%.展开更多
Isoconellone is an organic substance with irritating smell, which cannot be directly used and will cause physical discomfort when inhaled. Generally, the esterification-saponification method is adopted to make it into...Isoconellone is an organic substance with irritating smell, which cannot be directly used and will cause physical discomfort when inhaled. Generally, the esterification-saponification method is adopted to make it into ester or alcohol which can be directly applied to improve its utilization value. In this paper, through experimental research, a high-efficiency esterification treatment technology of rectification technology is proposed. The traditional esterification reaction is carried out in the rectification tower to improve the utilization rate of isoconellone. The experimental analysis shows that the yield of alcohols is 66.5% when the ratio of isoconellone to formic acid is 2: 3-1: 3, the theoretical plate number of the rectifying tower is 40-60, the reaction temperature is 85-90℃, the dosage of catalyst is 2-5% of the reactants, the saponification temperature is controlled at 70-100℃, and at the same time the concentration of by-products is reduced, the treatment pressure of three wastes is reduced, which is very friendly to the environment and has good economic benefits.展开更多
文摘The comprehensive utilization of iso-citronelene can solve the problem of resource waste, which is conducive to environmental protection and green economic development. In this paper, based on the alkene-ester-alcohol synthesis route, through the design of a reasonable orthogonal test scheme, the production process of isocitronelene hydration esterification under acid environment was studied in detail, to explore the optimal process conditions. The results showed that the optimum process was as follows: iso-citronelene: organic acid = 1:2, catalyst was sulfuric acid, dosage was about 2%~5% of iso-citronelene, reaction time was 5 hours. Under the condition of iso-citronelene + acetic acid, the synthetic yield of the hydration esterification of iso-citronelene was over 85%, and the content of alcohol in the product was > 90%.
文摘Isoconellone is an organic substance with irritating smell, which cannot be directly used and will cause physical discomfort when inhaled. Generally, the esterification-saponification method is adopted to make it into ester or alcohol which can be directly applied to improve its utilization value. In this paper, through experimental research, a high-efficiency esterification treatment technology of rectification technology is proposed. The traditional esterification reaction is carried out in the rectification tower to improve the utilization rate of isoconellone. The experimental analysis shows that the yield of alcohols is 66.5% when the ratio of isoconellone to formic acid is 2: 3-1: 3, the theoretical plate number of the rectifying tower is 40-60, the reaction temperature is 85-90℃, the dosage of catalyst is 2-5% of the reactants, the saponification temperature is controlled at 70-100℃, and at the same time the concentration of by-products is reduced, the treatment pressure of three wastes is reduced, which is very friendly to the environment and has good economic benefits.
