Production method and apparatus for high-power concentration of gulonic acid

Abstract

The invention discloses a production method and apparatus for high-power concentration of gulonic acid, which comprises delivering a resin ion-exchanged solution or concentrate from a conventional nanofilter to a precise filter through a delivery pump; delivering the material solution to a booster pump, and boosting a pressure to 50-70 bar; delivering the material solution to an online booster pump, mixing a part of concentrate from the outlet of a high-power concentration membrane and the material solution, and boosting the pressure to 55-75 bar; and separating the mixture through the high-power concentration membrane, driving water in the mixture under the high pressure to penetrate a membrane component to enter a dialysate pipe, discharging a part of the concentrated solution, and returning the rest of the concentrated solution to the inlet of the online booster pump. The invention also discloses a production apparatus for high-power concentration of gulonic acid. The invention can increase the concentration of gulonic acid to a higher level, reduce the investment cost of an evaporator, lower energy consumption by 90%, and improve the product quality.

Description

technical field [0001] The invention relates to a novel sodium guronate solution concentration process, which belongs to the field of vitamin C production. Background technique [0002] The production process of vitamin C has been greatly improved in recent years due to the application of membrane separation technology, and has been greatly improved in terms of product quality, yield and energy consumption. [0003] Among them, in the concentrated production process of the intermediate gulong acid of vitamin C, the traditional method is to evaporate and concentrate the resin ion exchange liquid, such as figure 1 As shown, the concentration of sodium guronate in the sodium guronate solution after resin ion exchange is generally 3-5%, the investment cost of the evaporator is high, the energy consumption is high, and because the sodium guronate is under high temperature conditions, the quality is also affected. Certainly affected. In recent years, nanofiltration membranes are...

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Problems solved by technology

[0004] Due to the reason of the traditional nanofiltration membrane concentration equipment, the upper limit of the working pressure of the nanofiltration membrane is 40bar, and the concentration of sodium guronate cannot be further increased under the pressure of not higher than 40bar. Therefore, the traditional nanofiltration membrane concentration The highest concentration at which the process can operate stably is 10-12%, and the investment and energy consumption of evaporation equipment are still high

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