The method for preparing 2-phenyl-2-propanol at normal temperature

A technology of propanol and phenyl, which is applied in the field of preparing 2-phenyl-2-propanol at normal temperature, can solve the problems of low conversion rate and low degree of cumene, achieve simple process, improve conversion rate, protect The effect of catalytic lifetime and catalytic activity

Active Publication Date: 2020-09-29
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, when metalloporphyrin is used to catalyze cumene to synthesize 2-phenyl-2-propanol, due to the life-span of metalloporphyrin and the inhibitory effect of 2-phenyl-2-propanol, making the use of metalloporphyrin as catalyst , the conversion rate of the reaction is not high, so that the oxidation reaction of cumene is relatively low

Method used

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  • The method for preparing 2-phenyl-2-propanol at normal temperature

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Add 30 mL of cumene, 12 mg of p-chloroporphyrin iron, and 500 mg of dibenzothiophene to a three-necked round-bottomed flask, feed oxygen at a rate of 10 mL / min, turn on the xenon lamp light source, and set the reaction temperature to 35 ℃, reaction time 10h.

[0032] (2) Determine the content of each substance after the reaction with indirect iodometric method and liquid chromatography.

[0033] In this reaction, the conversion rate of cumene is 31.97%, the selectivity of 2-phenyl-2-propanol is 87.01%, and the yield is 27.82%.

Embodiment 2

[0035](1) Add 30 mL of cumene and 12 mg of ferric p-chloroporphyrin into a three-necked round-bottomed flask, feed oxygen at a rate of 10 mL / min, set the reaction temperature to 35° C., and the reaction time to 10 h.

[0036] (2) Determine the content of each substance after the reaction with indirect iodometric method and liquid chromatography.

[0037] In this reaction, the conversion rate of cumene was 8.75%, the selectivity of 2-phenyl-2-propanol was 57.25%, and the yield was 5.01%.

Embodiment 3

[0039] (1) Add 30 mL of cumene and 12 mg of ferric p-chloroporphyrin into a three-neck round-bottomed flask, feed oxygen at a rate of 10 mL / min, turn on the xenon lamp light source, set the reaction temperature to 35°C, and the reaction time to 10 h.

[0040] (2) Determine the content of each substance after the reaction with indirect iodometric method and liquid chromatography.

[0041] In this reaction, the conversion rate of cumene is 27.91%, the selectivity of 2-phenyl-2-propanol is 86.20%, and the yield is 24.06%.

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Abstract

The invention discloses a novel process for synthesizing 2-phenyl-2-propyl alcohol at normal temperature by using cumene as a raw material, using oxygen as an oxidant and adding dibenzothiophene as arecyclable reducing agent under the irradiation of xenon light. The reaction temperature is reduced by adding the irradiation of xenon light, and the selectivity of the reaction is improved, so that the yield of 2-phenyl-2-propyl alcohol at room temperature is improved by 13% to 23% relative to that in the absence of the xenon light and the reducing agent; the catalyzing life of metalloporphyrin is prolonged and the catalytic activity of metalloporphyrin is improved by adding dibenzothiophene as the reducing agent, dibenzothiophene can be generated through automatic deoxygenation of an oxidative product dibenzothiophene sulfoxide under photocatalysis, the dibenzothiophene is recycled, the conversion rate of cumene is improved effectively and is increased by 4% to 11% relative to the condition that the reducing agent is not added.

Description

technical field [0001] The invention belongs to the field of fine organic synthesis and relates to a method for preparing 2-phenyl-2-propanol at normal temperature. Background technique [0002] 2-Phenyl-2-propanol is an important organic chemical intermediate and fine chemical raw material. Because of its aroma of roses, it can be used as a fragrance, and it can be used in cosmetics and other fragrance raw materials for preparing floral fragrance. It is mainly used in the production of peroxide dicumyl. Dicumyl peroxide is an excellent organic peroxide, as a crosslinking agent for rubber and plastics and an initiator for polymer materials, it is widely used in rubber, polyolefin, foam plastics, wire and cable, shoemaking and insulation enameled wire. Due to the importance of dicumyl peroxide, the preparation of 2-phenyl-2-propanol is also more important. [0003] The preparation of 2-phenyl-2-propanol is mainly based on cumene hydroperoxide as raw material, and is synthe...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C07C33/20C07C29/50
CPCC07C29/50C07C33/20
Inventor孔洋周新锐
OwnerDALIAN UNIV OF TECH