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Method for preparing cyclopentanol by hydrating cyclopentene

A technology for hydration of cyclopentene and cyclopentanol is applied in the directions of hydrolysis preparation, preparation of organic compounds, preparation of carboxylate, etc., and can solve the problems of large circulation amount of raw material cyclopentene, complicated process, low reaction conversion rate and the like , to achieve the effect of high product yield, simple process flow and simple operation

Active Publication Date: 2017-05-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the reaction conversion rate is relatively low, and the recycling amount of raw material cyclopentene is large.
Therefore, the process is complicated, the energy consumption is high, and the product yield is low

Method used

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  • Method for preparing cyclopentanol by hydrating cyclopentene
  • Method for preparing cyclopentanol by hydrating cyclopentene
  • Method for preparing cyclopentanol by hydrating cyclopentene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The commercially available D005-II sulfonic acid group cation exchange resin produced by Dandong Mingzhu Special Resin Co., Ltd. was soaked in toluene at 40°C for 28h, filtered and then soaked in methyl isobutyl ketone at 50°C for 40h. Addition reaction catalyst is obtained by washing and drying after filtering. The volume ratio of toluene or methyl isobutyl ketone to sulfonic acid cation exchange resin is 10:1. Take the above-mentioned addition reaction catalyst and put it into a Φ18mm×1200mm stainless steel reactor. The top and bottom of the reactor are respectively filled with quartz sand with a diameter of Φ0.5mm~1.2mm. After the reactor is installed, replace it with nitrogen three times, and The airtight test is qualified. Pass through cyclopentene and acetic acid to carry out addition reaction, the addition reaction conditions are shown in Table 2, and the addition reaction results are shown in Table 4. The above-mentioned addition reaction product and water ente...

Embodiment 2

[0022]Soak the commercially available DZH sulfonic acid-based cation exchange resin produced by Dandong Mingzhu Special Resin Co., Ltd. in toluene at 120°C for 10 hours, and then soak it in methyl isobutyl ketone at 80°C for 28 hours after filtration. After washing and drying, the addition reaction catalyst is obtained. The volume ratio of toluene or methyl isobutyl ketone to sulfonic acid-based cation exchange resin is 30:1. Take the above-mentioned addition reaction catalyst and put it into a Φ18mm×1200mm stainless steel reactor. The top and bottom of the reactor are respectively filled with quartz sand with a diameter of Φ0.5mm~1.2mm. After the reactor is installed, replace it with nitrogen three times, and The airtight test is qualified. Pass through cyclopentene and acetic acid to carry out addition reaction, the addition reaction conditions are shown in Table 2, and the addition reaction results are shown in Table 4. The above-mentioned addition reaction product and wat...

Embodiment 3

[0024] The commercially available D005-II sulfonic acid group cation exchange resin produced by Dandong Mingzhu Special Resin Co., Ltd. was soaked in toluene at 100°C for 15h, filtered and then soaked in methyl isobutyl ketone at 70°C for 35h. After filtering, washing and drying, the addition reaction catalyst is obtained. The volume ratio of toluene or methyl isobutyl ketone to sulfonic acid cation exchange resin is 20:1. Take the above-mentioned addition reaction catalyst and put it into a Φ18mm×1200mm stainless steel reactor. The top and bottom of the reactor are respectively filled with quartz sand with a diameter of Φ0.5mm~1.2mm. After the reactor is installed, replace it with nitrogen three times, and The airtight test is qualified. Pass through cyclopentene and acetic acid to carry out addition reaction, the addition reaction conditions are shown in Table 2, and the addition reaction results are shown in Table 4. The above-mentioned addition reaction product and water ...

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Abstract

The invention discloses a method for preparing cyclopentanol by hydrating cyclopentene. The method comprises the following steps: (1) performing addition reaction on cyclopentene and acetic acid under the action of modified sulfonic acid group cation exchange resin to produce cyclopentyl acetate, wherein the modified sulfonic acid group cation exchange resin is prepared by soaking the conventional sulfonic acid group cation exchange resin with methylbenzene and methyl isobutyl ketone sequentially; (2) enabling the material obtained in the step (1) to enter a rectifying tower, forming azeotrope with water on the lower part of the rectifying tower, performing hydrolysis reaction on the material and water under the action of a sulfonic acid group cation exchange resin catalyst filling the upper part of the rectifying tower, withdrawing a product cyclopentanol from the top of the tower and withdrawing acetic acid from the bottom of the tower. The method has the advantages of simple technical process, low energy consumption, high conversion rate, high selectivity, high product yield and the like.

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 under the action of an acidic cation exchange resin. 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 obtained from adipic acid through high-temperature deacidification to obtain cyclopentanone, and then through hydrogenation reaction. However, due to the large amount of pollutants and the restriction of raw material sources, this preparation method is gradually eliminated. In addition, C 5 In the distillate, cyclopentene obtained through separation is used as raw material, and cyclopentanol can also be produced through hydration reaction. There are two main met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/04C07C69/14C07C67/54C07C29/09C07C35/06C07C29/04
CPCC07C29/04C07C29/09C07C67/04C07C67/54C07C69/14C07C35/06
Inventor 霍稳周刘野张宝国李花伊
Owner CHINA PETROLEUM & CHEM CORP
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