Cooling crystallization equipment for purifying furanone

Abstract

The invention relates to cooling crystallization equipment for purifying furanone. The cooling crystallization equipment comprises a pre-cooling crystallization tank and a crystallization reactor. Theusing process comprises the following steps of pumping a high-temperature concentrated solution containing a semi-finished product of the furanone into the pre-cooling crystallization tank for pre-cooling crystallization, and then conducting cooling and crystallizing in the crystallization reactor. The using amount of a refrigerant is reduced through pre-cooling, so that the consumption of energyis reduced; moreover, a vibration technology and a separation technology after cooling crystallization are used, so that subsequent treatment steps are reduced, the crystallization quality and the crystallization efficiency are improved, the crystallization effect and process are controllable, and the cooling crystallization equipment has a relatively high using value.

Description

technical field [0001] The invention relates to cooling crystallization equipment for purifying furanone, which belongs to the technical field of chemical equipment. Background technique [0002] Furanone natural products exist in strawberry, oats, cheese, boiled beef, beer, cocoa, coffee, tea, mango, lychee, malt, gooseberry, grape, heated beef, pineapple, etc., in 1965, in the ether extraction of pineapple juice For the first time, furanone was isolated from the solution, and its molecular structure was determined. Furanone has strong caramel flavor, low fragrance threshold, and obvious fragrance effect, and is widely used as an additive in food, tobacco, beverages, etc. The process of preparing furanone by using methylglyoxal mainly includes: the coupling reaction of methylglyoxal with acetic acid and zinc powder to prepare the intermediate product hexanedione, and the cyclization reaction with disodium hydrogen phosphate after extraction and purification to obtain furan...

AI Technical Summary

Problems solved by technology

Among them, various crystallization methods have their own advantages and disadvantages. In the cooling crystallization process, the material concentration, material temperature, heat transfer temperature difference, heat transfer rate, stirring form and speed have a great influence on the quality of the crystallization material, and the crystallization process is difficult. control

When a jacketed crystallization tank is used, the inner wall of the crystallization tank is prone to fouling, which affects heat transfer and product quality. At the same time, the supersaturation of the tank wall is large, and the amount of secondary nucleation in the process is large, resulting in fine crystal particles and poor crystal form.

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