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A kind of method that cyclopentene prepares cyclopentyl alcohol through cyclopentyl formate

A technology of cyclopentene and cyclopentanol, which is applied in the field of cyclopentene to cyclopentyl formate to prepare cyclopentyl alcohol, can solve the problems of product separation and purification difficulties, environmental pollution, etc., to reduce the difficulty of separation, simplify the process flow, and transform high rate effect

Active Publication Date: 2021-10-08
FUZHOU UNIV +1
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Problems solved by technology

Although the catalyst CaO is used to catalyze the conversion rate of the transesterification reaction is high, but due to the small amount of moisture in the system, CaO will be hydrolyzed into Ca(OH) 2 And generate calcium acetate, resulting in difficulty in product separation and purification and pollution to the environment

Method used

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  • A kind of method that cyclopentene prepares cyclopentyl alcohol through cyclopentyl formate

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Embodiment 1

[0045] 3700kg / hr cyclopentene and 9312 kg / hr cyclopentene returned from the side mining of the subsequent olefin esterification tower are mixed and sent to the reactor. A total of 2845kg / hr of fresh formic acid and the formic acid returned from the formic acid recovery tower are also sent into the reactor. The reaction temperature of the reactor is 90°C, the reaction pressure is 0.4Mpa, the residence time of the materials in the reactor is 120min, and the molar ratio of cyclopentene to formic acid is 3.5.

[0046] The number of theoretical plates from the upper feed port to the top of the olefin esterification tower is 10, the number of theoretical plates between the feed port and the liquid side sampling port is 10, and the theoretical plate number from the liquid phase side sampling port to the tower kettle is 10. Count to 15. The ratio of reflux to feed at the top of the olefin esterification tower is 4, the temperature at the top of the tower is 85°C, the bottom of the to...

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Abstract

The invention relates to a method for preparing cyclopentyl alcohol from cyclopentene through cyclopentyl formate, comprising a reaction kettle (1), an olefin esterification tower (2), a hydrolysis tower (3), an azeotropic distillation tower (4), Stratifier (5) and formic acid recovery tower (6). Under the autocatalysis of formic acid, the raw material cyclopentene and formic acid undergo an addition reaction to generate cyclopentyl formate, and then cyclopentyl formate and water undergo hydrolysis reaction in a hydrolysis tower equipped with a strong acidic cation exchange resin to generate cyclopentyl alcohol and formic acid , formic acid can also be used as a raw material for the addition reaction. The synthesis route proposed by the invention has the characteristics of mild process conditions, high conversion rate, and environmental friendliness.

Description

technical field [0001] The invention relates to a method for preparing cyclopentyl alcohol from cyclopentene through cyclopentyl formate. Background technique [0002] Cyclopentanol is an important intermediate of fine chemical products, mainly used in the preparation of cyclopentanone, bromocyclopentane, chlorocyclopentane, etc., and can be used to manufacture antibacterial and antiallergic drugs. Cyclopentanol can be obtained from adipic acid through high-temperature deacidification to obtain cyclopentanone, and then through hydrogenation reaction. However, due to the large amount of pollutants produced in this process and the constraints of raw material sources, this preparation method has been gradually eliminated. . In the process of producing ethylene from petroleum cracking, a large amount of C5 fraction - dicyclopentadiene will be produced by-product. After depolymerization and selective hydrogenation of dicyclopentadiene, cyclopentene can be obtained. Therefore, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C35/06C07C29/09C07C29/74C07C29/82
CPCC07C29/095C07C29/74C07C29/82C07C67/04C07C2601/08C07C35/06C07C69/06
Inventor 黄智贤陈璐周伟邱挺刘征王红星叶长燊李玲
Owner FUZHOU UNIV
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