Chemical Intermediate Cyclopentanone Cas No: 120-92-3

25 Kilograms/Kilograms

1x40 Metric Ton/Metric Tons

9.18g/l slightly soluble

9.18g/l slightly soluble

84.12 Grams (g)

84.12 Milligram (mg)

120-92-3

120-92-3

Cyclopentanone is used as an intermediate in the synthesis of rubber adhesives, synthetic resins, pharmaceuticals and biologically active compounds. It acts as precursor for the preparation of cyclopentamine and also pentethylcyclanone, cyclopentobarbital. It is a useful laboratory reagent and is used as thinner for epoxies. It can also be used as a solvent in paint and varnish removers and for electronic applications. As a dry cleaning agent, it is used for oil extraction. It is also involved in the preparation of cyclopentanone derivatives like cyclopenylamine and cyclopentanol which find application in the perfume industry.

1, Take the n-valeraldehyde and cyclopentanone as raw material, and first go through aldol condensation reaction and further dehydration reaction to obtain pentylene cyclopentanone, then followed by selective catalytic hydrogenation to obtain pentyl cyclopentanone. Pentyl cyclopentanone has strong floral and fruity aroma as well as nuances of jasmine. It can be used in the formulation of daily chemical flavor with the usage amount being less than 20%. IFRA has no restrictions. 2, Take n-hexanal and cyclopentanone as the raw material, first have condensation, and then perform selective hydrogenation reaction to obtain hexyl cyclopentanone. Hexyl cyclopentanone has strong jasmine smell accompanied by fruit nuances and can be used in perfume fragrance as well as the formulation of other kinds of fragrance with the usage amount being less than 5%. IFRA has no restrictions. 3, Take the 1-pentene or 1-heptene obtained by the cracking of paraffin or dehydration of the corresponding alcohol as the raw material, in the presence of t-butyl peroxide as the initiator, have addition reaction of the free radical group with cyclopentanone, generating 2-pentyl cyclopentanone (or 2-heptyl-cyclopentanone) with oxidation and ring expansion reaction to become I'-lactone (or I'-Dodecalactone). 4 Synthesis route with cyclopentanone being the starting material is of the greatest industrial production value. Cyclopentanone is first had aldol condensation reaction with n-valeraldehyde with the dehydration products further undergoing condensation and the selective hydrogenation to generate 2-pentyl cyclopentanone. It finally undergoes oxidation and ring expansion to become I'-decalactone. 5, I'-decalactone is mainly used in the formulation of edible food flavor. It is considered with the characteristic flavor of the natural cream. Before its emergence, perfumers had long been limited to application of monomer spices such as butanedione and vanillin monomers to be as the major raw material for the deployment of butter flavor. But it is generally recognized that the formulated butter flavor is worse than natural products in the respects of both taste or flavor respects. Only after the use of I'-decalactone can it have realistic cream flavor, especially in the case of using I'-Dodecalactone and I'-decalactone in combination for being as the main flavor raw material which can further improve the flavor and effect of the formulated cream spice. 6, Take cyclopentanone and pentanal as raw materials, have condensation to produce 2-(1-hydroxy) pentyl cyclopentanone which is then reacted with dimethyl malonate and hydrolyzed at 160~180 a , go through decarboxylation, esterification to obtain methyl dihydrojasmonate. Methyl dihydrojasmonate is the edible flavor provided by the GB2760-1996 of China for temporary application. Its aroma is better than the natural methyl jasmonate. Its property is also relatively stable.

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