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Cyclopentaol preparing and refining method

A technology for cyclopentanol and cyclopentene is applied in the field of preparation and purification of cyclopentanol, and can solve the problems of large circulation amount of raw material cyclopentene, low reaction conversion rate and the like

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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  • Cyclopentaol preparing and refining method
  • Cyclopentaol preparing and refining method
  • Cyclopentaol preparing and refining method

Examples

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Embodiment 1～6

[0023] The hydration reaction is carried out in a 500ml autoclave equipped with a stirring device and a heating device. 30 grams of spherical strongly acidic cation exchange resin (main catalyst) with sulfonic acid groups anchored on the surface are packed into a hanging basket, and then the hanging basket is fixed above the stirring paddles. Trialkylamine (co-catalyst), cyclopentene, water and solvent phenol are pumped into the kettle with a peristaltic pump according to the required ratio. After replacing the air in the autoclave three times with nitrogen, the pressure was raised to an absolute pressure of 1.0-3.0 MPa with nitrogen. Start the stirring device and heat up to raise the temperature, control the reaction temperature to 130-180°C, and keep the required reaction time.

[0024] After the reaction was finished, cool to room temperature, discharge, and let stand to separate layers. The oil phase material is heated and distilled under normal pressure, the fraction at...

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Abstract

This invention is cyclopentanol making and refining method, including the procedure: 1) in the existence of catalyst cyclopentene pass hydration reaction in solvent phenylic acid. the mole ratio of cyclopentene and water is 0.8-5.0, reaction temperature 130-180deg.C, reaction pressure 1.0-3.0MPa and reaction time 1-5 hours, the catalyst comprises the main catalyst and activator, the catalyst is strong acid cation exchange resin with sulfo group anchored on the surface, and the activating solvent is trialkylamine. The dosage of catalysts are: cyclopentene / main catalyst=(10-30) / 1; activator / main catalyst=(0.1-5) / 100. The reacted materials cool to house temperature and demix into oil phase and aqueous phase, the oil phase materials through continuous distilling to cut 38-55deg.C cuts to cool and get cyclopentene, and cut 135-165deg.C cuts to cooling collect refined cyclepentanol, the residue is material full of phenylic acid.

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 郭世卓徐泽辉黄亚茹曹强房鼎业
Owner SINOPEC SHANGHAI PETROCHEMICAL CO LTD
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