Method for purifying deoxyribose

Abstract

The invention discloses a technology for purifying deoxyribose through supercritical fluid crystallization. The technology comprises the steps as follows: (1) spraying a neutralized 90 DEG C deoxyribose liquor containing impurities from the top of an extraction tower through a raw material pump, meanwhile, introducing a supercritical fluid into the bottom of the extraction tower, and controlling the temperature of the supercritical fluid at 33-36 DEG C, the pressure at 9-11 Mpa and the flow at 15-20 m<3> / min; (2) reducing the pressure of the high-pressure supercritical fluid containing dissolved deoxyribose to the pressure lower than supercritical flow critical pressure through a throttle valve to allow the supercritical fluid to enter a separation kettle; (3) after extracting the deoxyribose, performing dehydration and drying processes sequentially on a product. The technology is simple, the equipment structure is compact, meanwhile, crystals form a crystal layer on a heat transfer surface instead of suspending in a liquid in the technological process, so that blockage of equipment and pipelines is avoided, and production faults are reduced. The product produced with the technology has high purity, bright and white appearance, good bioactivity and uniform grain size.

Description

technical field [0001] The present invention relates to a method for purifying deoxyribose, in particular to a method for purifying deoxyribose by supercritical fluid. Background technique [0002] Deoxyribose is a food preservative and preservative. This product has a strong antibacterial effect on yeast, spoilage bacteria and mold in food, and is widely used in the preservation and preservation of meat, fish, vegetables, fruits, beverages, cakes, etc. spectrum bacteriostatic agents. At present, the equipment for large-scale production of deoxyribose at home and abroad is a general enamel reaction kettle. The process of its mature process is roughly as follows: that is, dehydroacetic acid is neutralized with sodium hydroxide, and then the enamel kettle is cooled for crystallization, dehydration, drying, Packaging and other processes are used to obtain finished products. However, because the cooling temperature of the enamel kettle is not well controlled, it is easy to mak...

AI Technical Summary

Problems solved by technology

At present, the equipment for large-scale production of deoxyribose at home and abroad is a general enamel reaction kettle. The mature process is roughly as follows: that is, take dehydroacetic acid and sodium hydroxide for neutralization reaction, and then cool and crystallize through the enamel kettle, dehydrate, dry, Finished products are obtained through packaging and other processes. However, due to the poor control of the cooling temperature of the enamel kettle, it is easy to make the material sticky, the yield is not high, the purity is also greatly affected, and the appearance is very bad.

Chinese patent CN102219770 discloses a method for purification by membrane filtration, but with this method, the product purity still does not meet the requirements

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