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Preparation method of 4-methylimidazole

A technology of methyl imidazole and formaldehyde, applied in the field of preparation of 4-methyl imidazole, can solve problems such as low production efficiency, poor product quality, etc., and achieve the effects of improved production efficiency and product quality, reliable product performance, and small and medium-sized effects.

Inactive Publication Date: 2018-11-13
南京雪郎化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention discloses a preparation method of 4-methylimidazole to solve the problems of low production efficiency and poor product quality in the prior art

Method used

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  • Preparation method of 4-methylimidazole

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Such as figure 1 Shown a kind of preparation method of 4-methylimidazole, comprises the steps:

[0023] (1) Preliminary reaction: Add ammonium oxalate, formaldehyde, and methylglyoxal at a uniform speed within 3 minutes to the reaction kettle equipped with a stirring device and a temperature adjustment device, and during the addition process, the materials in the reaction kettle are uniformly separated by the stirring device. For the stirring operation, after completing the addition of materials and continuing to stir for 3 minutes to obtain the mixture, under the condition of keeping the stirring state unchanged, within 10 minutes, the temperature in the reactor was raised to 40°C at a uniform speed, and the mixture was obtained after continuous stirring and heat preservation for 3 hours. Reactants, keep warm and keep the stirring state of the material unchanged for later use;

[0024] (2) Synthesis reaction: Pass ammonia gas into the synthesis reactant prepared in st...

Embodiment 2

[0034] Such as figure 1 Shown a kind of preparation method of 4-methylimidazole, comprises the steps:

[0035] (1) Preliminary reaction: Add ammonium oxalate, formaldehyde, and methylglyoxal at a uniform speed within 10 minutes at the same time to the reaction kettle equipped with a stirring device and a temperature regulating device, and during the addition process, the materials in the reaction kettle are uniformly separated by the stirring device. For the stirring operation, after completing the addition of materials and continuing to stir for 5 minutes to obtain the mixture, under the condition of keeping the stirring state unchanged, within 30 minutes, the temperature in the reactor was raised to 95°C at a uniform speed, and the synthesis was obtained after continuous stirring and heat preservation for 5 hours. Reactants, keep warm and keep the stirring state of the material unchanged for later use;

[0036] (2) Synthesis reaction: Pass ammonia gas into the synthesis rea...

Embodiment 3

[0046] A preparation method for 4-methylimidazole, comprising the steps of:

[0047] (1) Preliminary reaction: Add ammonium oxalate, formaldehyde, and methylglyoxal at a uniform speed within 7 minutes to the reaction kettle equipped with a stirring device and a temperature regulating device, and during the addition process, the materials in the reaction kettle are uniformly separated by the stirring device. For the stirring operation, after completing the addition of materials and continuing to stir for 6 minutes to obtain the mixture, under the condition of keeping the stirring state unchanged, within 20 minutes, the temperature in the reactor was raised to 80°C at a uniform speed, and the synthesis was obtained after continuous stirring and heat preservation for 4 hours. Reactants, keep warm and keep the stirring state of the material unchanged for later use;

[0048] (2) Synthesis reaction: Pass ammonia gas into the synthesis reactant prepared in step (1) at a uniform speed...

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Abstract

The invention discloses a preparation method of 4-methylimidazole. The preparation method comprises a preliminary reaction, a synthetic reaction, potential of hydrogen adjustment, an extracting operation and purification. A synthetic process is simple and standardized, a production technology and a production flow are easy to control, and a prepared product is reliable in performance and good in stability. The summary and accumulation of production experiences are convenient, and production raw materials and production processes are simple at the same time. The toxicity and pollution are smallin the raw materials and the production processes, the cost is low, the production efficiency and the product quality are remarkably improved compared with a traditional production technology, and the method is convenient for rapid popularization and application of a 4-methylimidazole product technology.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a preparation method of 4-methylimidazole. Background technique [0002] 4-Methylimidazole has a very wide range of applications in the fields of chemical industry, biomedicine, etc., with a huge amount of use and a wide range of uses. However, in the actual production and preparation process of 4-Methylimidazole products, the current production and preparation processes are relatively On the one hand, the current production process of 4-methylimidazole products is relatively insufficient, and the production technology experience cannot be effectively exchanged; on the other hand, it also causes the product quality of 4-methylimidazole products produced by different processes , production efficiency and production cost are all very different, which has led to the relatively poor quality stability of 4-methylimidazole products currently on the market, and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D233/58
CPCC07D233/58
Inventor 李云政张磊
Owner 南京雪郎化工科技有限公司
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