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Method for preparing cyclopentanol by hydration of cyclopentene

A technology of cyclopentene water and cyclopentanol, which is applied in hydroxyl addition preparation, organic chemistry and other directions, can solve the problems of low reaction conversion rate and large circulation of raw material cyclopentene, etc.

Active Publication Date: 2005-10-05
SINOPEC SHANGHAI PETROCHEMICAL CO LTD
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  • Abstract
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Problems solved by technology

But the deficiency of this method is that the reaction conversion rate is still relatively low, and the circulation amount of raw material cyclopentene is relatively large

Method used

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  • Method for preparing cyclopentanol by hydration of cyclopentene
  • Method for preparing cyclopentanol by hydration of cyclopentene
  • Method for preparing cyclopentanol by hydration of cyclopentene

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Embodiment 1～6

[0017] The hydration reaction was carried out in a stainless steel single-tube reactor of φ25mm×1000mm. A 300-mesh stainless steel mesh was placed at the bottom of the reactor, and then 100ml of main catalyst strong acidic cation exchange resin was loaded, and the air in the single-tube reactor was replaced three times with nitrogen. Cyclopentene, water and co-catalyst trialkylamine are sent into the preheater according to the required ratio by a metering pump, and the materials are heated to 130-180°C. The preheated material enters the single-tube reactor for hydration reaction, the reaction temperature is controlled at 130-180°C, and the reaction pressure is 1.0MPa-3.0MP in absolute pressure. The reaction product was cooled to room temperature, allowed to stand and separated into layers, and the water phase material and the oil phase material were distilled and separated to obtain the product cyclopentanol and unreacted cyclopentene. Water and unreacted cyclopentene are retu...

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Abstract

This invention is a method that cyclopentene makes cyclopentanol through hydration. It uses cyclopentene and water as raw materials, and cyclopentene, water and activator continuously pass through catalyst fixed bed to carry out hydration reaction, the mole ratio of cyclopentene and water is 0.8-5.0, reaction temperature 130-180deg.C, reaction pressure 1.0-3.0MPa, and the catalyst is strong acid cation exchange resin with sulfo group anchored on the surface, and the activating solvent is trialkylamine. The weigh ration of activators is: cycloamylene: activator=100:(0.2-5). This invention advances the conversion of hydration cyclopentene and maintains the selectivity at high level.

Description

technical field [0001] The invention relates to a method for preparing cyclopentanol by hydrating cyclopentene, in particular to a method for preparing cyclopentanol by hydrating cyclopentene by using a strongly acidic cation exchange resin as a catalyst. Background technique [0002] Cyclopentanol is an important intermediate of fine chemical products, mainly used in the preparation of bromocyclopentane, chlorocyclopentane, etc., and can be used to manufacture antibacterial, antiallergic and other drugs. Cyclopentanol can be prepared from adipic acid through high-temperature decarboxylation to cyclopentanone, and then hydrogenated. However, due to the large amount of pollutants and the restriction of raw material sources, this preparation method is increasingly limited. In addition, cyclopentene, which is processed from the C5 fraction produced by petroleum cracking to produce ethylene, can also be used as raw material to produce cyclopentyl alcohol through hydration reacti...

Claims

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Application Information

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IPC IPC(8): C07C29/04C07C35/06
Inventor 郭世卓徐泽辉谢家明叶军明夏蓉晖房鼎业
Owner SINOPEC SHANGHAI PETROCHEMICAL CO LTD
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