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Cyclopentanol preparing and refining method

A refining method and technology of cyclopentanol, which is applied in the field of preparation and refining of cyclopentanol, and 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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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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  • Cyclopentanol preparing and refining method
  • Cyclopentanol preparing and refining method
  • Cyclopentanol preparing and refining method

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Embodiment 1～6

[0023] 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, solvent phenol and co-catalyst trialkylamine are sent to 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-3.0MPa absolute.

[0024] After the reaction product is cooled to room temperature, it is allowed to stand and separate to obtain water phase materials and oil phase materials. The oil phase materials enter a heat exchanger to preheat to 100-120°C, and then enter a rectification column with 18 theoret...

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Abstract

This invention is a making and refining method of cyclopentanol, which includes: 1) the materials comprises cyclopentene, phenylic acid solvent, water activator continuously pass through catalyst fixed bed to carry out hydration reaction, and the volume space velocity is 2-15hr to the power -1, the mole ratio of cyclopentene and water is 0.8-5.0, the weight ratio of phenylic acid and cycloamylene is 0.5-1.0. the intensity of activator is 0.01-0.2wt%, the reaction temperature is 130-180deg.C, the reaction pressure is 1.0-3.0MPa, the catalyst is strong acid cation exchange resin with sulfo group anchored on the surface, and the activating solvent is trialkylamine; 2)the reacted materials cool to house temperature and demix into oil phase and aqueous phase, the oil phase materials through continuous distilling separation procedure get non-reacting cycloamylene, refined cyclopentanol and phenylic acid full of solvent. The strong points of this invention are that the conversion of cyclopentene and selectivity of cyclopentanol are high, and the refining of cyclopentanol is simple and low energy consumption.

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): C07C29/04C07C29/80C07C35/06
Inventor 郭世卓徐泽辉孙春水黄亚茹方玲房鼎业
Owner SINOPEC SHANGHAI PETROCHEMICAL CO LTD
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