Cyclopentanol green synthetic method

A technology for green synthesis and cyclopentanone, applied in chemical instruments and methods, preparation of carbon-based compounds, preparation of organic compounds, etc., can solve the problems of less side reactions, corrosion, and low energy consumption, so as to increase yield and reduce The effect of scrap rate and low energy consumption

Inactive Publication Date: 2014-07-02
张若煜
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The present invention has the characteristics of high selectivity, high yield, low energy consumption, less side reactions, and can solve the problems of corrosion and environmental pollution

Method used

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  • Cyclopentanol green synthetic method
  • Cyclopentanol green synthetic method
  • Cyclopentanol green synthetic method

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Embodiment 1

[0028]A green synthesis method of cyclopentanone in this embodiment is characterized in that it includes the following steps: 1) Using dicyclopentadiene, a by-product in the process of producing ethylene from petroleum cracking, as a raw material, high-temperature cracking and rapid separation and cooling to obtain cyclopentadiene ; 2) Cyclopentadiene is prepared by selective hydrogenation under the action of the first catalyst, adding 4,5-dimethyl-1,3-dioxole as an auxiliary agent with a mass fraction of 0.8% cyclopentene; 3) then cyclopentene and acetic esterification reaction to obtain cyclopentyl acetate; 4) followed by the reaction of cyclopentyl acetate and sodium hydroxide to generate cyclopentyl alcohol; 5) using constant temperature crystallization technology, high temperature acetic acid The sodium solution is continuously added to the crystallization tank with cyclopentanol, and under the action of the second catalyst, the crystals are separated by continuous centrif...

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Abstract

The invention discloses a cyclopentanone green synthetic method, which is characterized by comprising the following steps: 1)a by-product dicyclopentadiene is taken as a raw material during a process of cracking petroleum to prepare ethane, the processes of pyrolysis, quick separation and cooling to obtain cyclopentadiene; 2)under the effect of a first catalyst on cyclopentadiene, an auxiliary agent with mass fraction with 0.8% is added for selective hydrogenation to prepare cyclopentene; 3)then cyclopentene and acetic acid are performed with a esterification reaction to prepare et hanoic acid cyclopentyl ester; 4) then et hanoic acid cyclopentyl ester and sodium hydroxide are reacted to generate cyclopentanol; and 5)a constant temperature crystallization technology is employed, a crystallization kettle with cyclopentanol is continuously added in a high temperature sodium acetate solution, under the effect of a second catalyst, the crystal is continuously centrifuged, a large mother liquor is used for circularly cooling and performing heat exchange and then is returned to a crystallization kettle, and the catalysis and dehydrogenation are carried out to prepare the cyclopentanone. The cyclopentanone green synthetic method has the advantages of high selectivity, high yield, low energy consumption and less side reaction, and can solve the problems of corrosion and environmental pollution.

Description

technical field [0001] The invention relates to a green synthesis method of cyclopentanone. Background technique [0002] Cyclopentanol (CAS: [96-41-3]) is a colorless viscous liquid with an aromatic odor. It is mainly used in pharmaceutical intermediates and flavors and fragrances. It is an indispensable raw material for the drug cyclopentathiazine and the new non-barbiturate intravenous anesthetics for the treatment of edema and hypertension. Cyclopentanol and aspartic acid synthesize cyclopentyl aspartate, conjugate acid cyclopentyl ester, and fatty acid cyclopentyl fatty acid, all of which have important biochemical medical functions. [0003] Cyclopentanone (CAS: [120-92-3]) is a water-white liquid with an ether-like odor. Cyclopentanone is an important fine chemical intermediate. It is an essential raw material for the preparation of floral-flavored fragrance methyl dihydrojasmonate, milk-flavored fragrance cyclic lactone and alkylcyclopentanone series of fragrances....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C49/395C07C45/51
Inventor 张若煜陈怀红
Owner 张若煜
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