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Method for preparing cyclopentanol

A technology of cyclopentanol and cyclopentene, which is applied in the field of preparation of cyclopentanol, can solve the problems of increased energy consumption, complex process flow, high energy consumption, etc., and achieve good activity and stability

Active Publication Date: 2018-05-25
FUSHUN RES INST OF PETROLEUM & PETROCHEMICALS SINOPEC CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] CN102911106A discloses a method for cyclopentene hydration to produce cyclopentanol. The method is a direct hydration method, and a third organic solvent is added in the reaction process, which makes the subsequent separation process complicated, increases the energy consumption of the whole process, and directly The one-way conversion rate of hydration method is generally low; CN102399133A discloses the method for preparing cyclopentanol by cyclopentene through indirect hydration, although the conversion rate is improved compared with direct hydration method, but in the whole process cyclopentene and acetic acid addition reaction product The hydrolysis reaction needs to be carried out after rectification and purification, the process flow is complicated and the energy consumption is high

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  • Method for preparing cyclopentanol

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Effect test

Embodiment 1

[0026] 1. Preparation of modified ion exchange resin catalyst: a: Wash 150 grams of styrene-based strongly acidic cation exchange resin with deionized water for 3 times, each time for 10 minutes, and dry it in a vacuum oven at 80°C for 4 hours; b: Put the dried strongly acidic cation exchange resin into a 2mm thick steel mesh bag, spread it in an ultrasonic vibrator with a vibration frequency of 60kHz, and add 20% Zn(NO 3 ) 2 Spray and impregnate the aqueous solution and nitrogen with an atomizing nozzle for 2 hours, the spray distance is 1cm, and the spray pressure is 0.06MPa; c: impregnate the resin with 200ml modified solution for 1 hour, and then titrate it to neutrality with ammonia water; d: Put a vacuum at 80°C after washing After drying in a drying oven for 6 hours, the dried ion exchange resin was calcined at 200° C. for 8 hours to obtain a modified ion exchange resin catalyst.

[0027] 2. The addition reaction is carried out on a fixed-bed continuous reaction device...

Embodiment 2

[0029] 1. Preparation of modified ion exchange resin catalyst: a: Wash 150 grams of styrene-based strongly acidic cation exchange resin with deionized water for 5 times, each time for 10 minutes, and dry it in a vacuum oven at 90°C for 6 hours; b: Put the dried strongly acidic cation exchange resin into a 3mm thick steel mesh bag, lay it flat on an ultrasonic vibrator with a vibration frequency of 56kHz, and add 25% Zn(NO 3 ) 2Spray and impregnate the aqueous solution and nitrogen with an atomizing nozzle for 2 hours, the spray distance is 2cm, and the spray pressure is 0.07MPa; c: impregnate the resin with 200ml modified solution for 1 hour, and then titrate it to neutrality with ammonia water; d: Put a vacuum at 90°C after washing After drying in a drying oven for 6 hours, the dried ion exchange resin was calcined at 220° C. for 8 hours to obtain a modified ion exchange resin catalyst.

[0030] 2. The addition reaction is carried out on a fixed-bed continuous reaction devic...

Embodiment 3

[0032] 1. Preparation of modified ion exchange resin catalyst: a: Wash 150 grams of styrene-based strongly acidic cation exchange resin with deionized water for 5 times, each time for 10 minutes, and dry it in a vacuum oven at 90°C for 6 hours; b: Put the dried strongly acidic cation exchange resin into a 2mm thick steel mesh bag, lay it flat in an ultrasonic vibrator, the vibration frequency is 55kHz, and add 30% Zn(NO 3 ) 2 Spray and impregnate the aqueous solution and nitrogen with an atomizing nozzle for 2 hours, the spray distance is 1cm, and the spray pressure is 0.05MPa; c: impregnate the resin with 200ml modified solution for 1 hour, and then titrate it to neutrality with ammonia water; d: Put a vacuum at 90°C after washing After drying in a drying oven for 6 hours, the dried ion exchange resin was calcined at 220° C. for 8 hours to obtain a modified ion exchange resin catalyst.

[0033] 2. The addition reaction is carried out on a fixed-bed continuous reaction device...

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Abstract

The invention discloses a method for preparing cyclopentanol. The method comprises steps as follows: acetic acid and cyclopentene are taken as reaction materials and subjected to an addition reactionin a fixed bed continuous reaction device filled with an ion exchange resin catalyst, the reacted materials and water enter a catalytic rectifying tower reboiler, azeotropic steam rises to a catalyticrectifying tower reaction section filled with a modified ion exchange resin catalyst for a hydrolysis reaction, little water is added to the top of the reaction section in the reaction process, a hydrolysate is distilled from the tower top and purified, and a cyclopentanol product is obtained. According to the method, the reaction process is simple, the conditions are mild, and the catalyst has stable activity and can operate in a long cycle.

Description

technical field [0001] The invention relates to a method for preparing cyclopentanol, in particular to a method for preparing cyclopentanol by using acetic acid and cyclopentene as raw materials. Background technique [0002] Cyclopentanol, also known as hydroxycyclopentane, is a colorless transparent liquid with an aromatic odor, soluble in ethanol and slightly soluble in water. It is an important chemical raw material and pharmaceutical intermediate, which can be used in the production of fuels and fragrances, and can also be used as a solvent for drugs and fragrances. Cyclopentanol is the main raw material for the synthesis of cyclopentanone. Cyclopentanone is an important fine chemical intermediate and one of the main raw materials in the perfume and pharmaceutical industries. It can be used in the preparation of various anti-inflammatory and anti-cancer drugs. It can be used in the synthesis of pesticides and herbicides. In addition, because cyclopentanone has good so...

Claims

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Application Information

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IPC IPC(8): C07C29/09C07C35/06C07C67/04C07C67/54C07C69/14B01J31/08
CPCB01J31/08C07C29/095C07C67/04C07C67/54C07C35/06C07C69/14Y02P20/10
Inventor 刘野霍稳周李花伊邓玉媛张宝国
Owner FUSHUN RES INST OF PETROLEUM & PETROCHEMICALS SINOPEC CORP
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