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Preparation method of acetone dimethyl alcohol

A technology of acetone dimethyl acetal and methanol, which is applied in the field of organic compound preparation, can solve the problems of high reaction yield, high catalyst activity, and low energy consumption, and achieve the effects of simple operation, increased reaction yield, and improved yield

Pending Publication Date: 2019-05-21
JIANGSU DINGYE PHARMA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the methanol and acetone method in the prior art, and provide a DMP system with high catalyst activity, high reaction yield and low energy consumption.

Method used

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  • Preparation method of acetone dimethyl alcohol

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Experimental program
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Effect test

Embodiment 1

[0027] 1) Methanol (A) and acetone (B) from the storage tank in the tank farm are pumped into the batching tank at a molar ratio of 3.5:1;

[0028] 2) The mixture of methanol and acetone in the batching tank is pumped into the built-in steam coil and the distillation still with a distillation tower; The temperature is ≤80°C, and a certain reflux ratio is controlled at the top of the tower; part of the material in the reflux condenser is refluxed into the still, and the rest is cooled to 45-50°C by the first-stage condenser, the first-stage heat exchanger and the post-step alkalizer The material coming out is heat-exchanged and cooled to 30-35°C, and the frozen brine in the secondary condenser is cooled to -15°C to -20°C, and then enters the alkylation reactor after cooling down; another part of methanol from the methanol metering tank (C ) and the outlet material from the primary condenser enter from the same inlet of the primary heat exchanger; the molar ratio of methanol (C)...

Embodiment 2

[0034] 1) Methanol (A) and acetone (B) from the storage tank in the tank farm are pumped into the batching tank at a molar ratio of 3.8:1;

[0035] 2) The mixture of methanol and acetone in the batching tank is pumped into the built-in steam coil and the distillation still with a distillation tower; The temperature is ≤80°C, and a certain reflux ratio is controlled at the top of the tower; part of the material in the reflux condenser is refluxed into the still, and the rest is cooled to 45-50°C by the first-stage condenser, the first-stage heat exchanger and the post-step alkalizer The material coming out is heat-exchanged and cooled to 30-35°C, and the frozen brine in the secondary condenser is cooled to -15°C to -20°C, and then enters the alkylation reactor after cooling down; another part of methanol from the methanol metering tank (C ) and the outlet material from the primary condenser enter from the same inlet of the primary heat exchanger; the molar ratio of methanol (C)...

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Abstract

The invention relates to a preparation method of acetone dimethyl alcohol. The preparation method of the acetone dimethyl alcohol comprises the following steps: taking methanol and acetone as reactionraw materials, adding the methanol in two parts, performing reaction on the reaction raw materials in the presence of acidic resin and a molecular sieve catalyst, and separating a reaction product bya partition wall type rectifying tower. Compared with the prior art, the preparation method of the acetone dimethyl alcohol has the advantages of high catalyst activity, high reaction yield, efficient separation and low energy consumption.

Description

technical field [0001] The invention relates to the field of organic compound preparation, in particular to a preparation method of acetone dimethyl acetal. Background technique [0002] Acetone dimethyl acetal, also known as 2,2-dimethoxypropane, abbreviated as DMP, is an important organic intermediate. DMP can be used as hydroxyl protecting agent, condensing agent, cyclizing agent, dehydrator, insecticide, herbicide, etc., and has a wide range of applications in the development and industrial production of fine chemical products such as medicine, pesticide, and natural products. [0003] At present, the synthetic methods of DMP include propyne and methanol synthesis method, methanol and acetone method, orthomethyl ester and acetone method, etc., wherein propyne and methanol synthesis method usually need to add a certain amount of mercuric oxide, and the reaction yield is low, and Mercury oxide with high toxicity is used; the price of methyl orthoate as a raw material in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C41/56C07C41/58C07C43/303
CPCY02P20/10
Inventor 戴铭周永广郭楷
Owner JIANGSU DINGYE PHARMA CO LTD
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