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Chlorination method and device used in ethyl maltol production

A technology of ethyl maltol and chlorination reaction, which is applied in the direction of organic chemistry, can solve the problems of low chlorination reaction efficiency, difficult operation control, long production cycle, etc., and achieves difficult escape, safe and convenient operation, and high utilization rate of equipment Effect

Inactive Publication Date: 2011-05-18
ANHUI JINGHE IND
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Problems solved by technology

[0013] The technical problem to be solved by the present invention is to provide a chlorination reaction method and device in the production of ethyl maltol, which solves the problems of low efficiency of chlorination reaction, difficult operation control, long production cycle and low yield

Method used

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  • Chlorination method and device used in ethyl maltol production
  • Chlorination method and device used in ethyl maltol production

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Embodiment Construction

[0028] (1), the chlorination reaction device in the production of ethyl maltol, comprises the liquid chlorine cylinder 2 and the plate heat exchanger 3 of chlorination still 1, water-bath heating, and chlorination still 1 top is provided with feed inlet 4, and bottom is provided with There is a discharge port 5 and a chlorine valve 6, and a dripping pipe 7 is arranged inside. The dripping valve 8 on the top of the dripping pipe 7 extends out of the chlorination kettle body 1, and the chlorine valve 6 passes through the buffer bottle 9 and the liquid chlorine cylinder. 2, the discharge port 5 of the chlorination kettle 1 is connected with the hot fluid inlet port 11 of the plate heat exchanger 3 through the circulating pump 10, and the feed port 4 is connected with the cooling fluid of the plate heat exchanger 3 The outlet port 12 is connected.

[0029] (2), the chlorination reaction method in the ethyl maltol production, comprises the following steps:

[0030] a. After methan...

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Abstract

The invention discloses a chlorination method and device used in ethyl maltol production. The chlorination device comprises a reactor, a circulating pump and a plate type heat exchanger. The chlorination method comprises the steps of: firstly, pumping a methanol solution into a chlorination kettle for freezing to be below -18 DEG C, then dropping furfuryl alcohol, introducing chlorine in a steel liquid chlorine cylinder into the chlorination kettle through a buffering tank, cyclically cooling materials by the plate type heat exchanger, and controlling the reaction temperature to be lower than -8 DEG C. The method is safe and convenient to operate; the device has simple structure; and the utilization rate of the raw materials and the yield of products are improved.

Description

technical field [0001] The invention relates to the production field of maltol, in particular to a chlorination reaction method and device in the production of ethyl maltol. Background technique [0002] Maltol (including ethyl maltol) is a broad-spectrum flavor enhancer with a pleasant burnt-sweet aroma. It is widely used in daily chemicals, beverages, food, medicine, tobacco, wine and other fine chemical fields. [0003] For the production of maltol (including ethyl maltol), domestic and foreign manufacturers mainly adopt the furfural route. The production process is as follows: magnesium and halogenated alkanes are reacted to synthesize Grignard reagents in the presence of anhydrous ether or tetrahydrofuran solvent, and then the Grignard reagents are Addition with furfural, and then hydrolyzed to obtain furfuryl alcohol intermediate; the furfuryl alcohol intermediate after separation of the solvent is chlorinated with chlorine gas at low temperature in methanol aqueous so...

Claims

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Application Information

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IPC IPC(8): C07D309/32
Inventor 杨迎春
Owner ANHUI JINGHE IND
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