Extraction method of erythritol

Abstract

The invention relates to the technical field of functional sugar processing and extraction, and discloses an erythritol extraction method, which comprises the following steps: fermentation liquid preparation, ceramic membrane filtration, carbon filtration, decoloration, primary crystallization, dissolution and condensation, secondary crystallization, centrifugation, and drying and packaging, the original process flow requiring two times of dissolution and condensation is changed, the process flow is simplified, the production cost is reduced, and the production efficiency is improved. The defect of long extraction period of the original process is changed, the production cost is reduced, and the production efficiency is improved; ultrafiltration of a traditional process is replaced by carbon filtration, secondary investment of equipment is avoided, and the equipment cost is greatly reduced; through vacuum cooling, the speed is high, the defects of forced circulation, slow cooling and 15 h / batch cooling time of a traditional process are overcome, 5 h / batch of products in each batch can be controlled, and the crystal form is good.

Description

technical field [0001] The invention relates to the technical field of functional sugar processing and extraction, in particular to an extraction method of erythritol. Background technique [0002] Erythritol, white crystal, slightly sweet, relative sweetness 0.65, has a cool feeling, low calorific value, about one tenth of the calorific value of sucrose. Soluble in water (37%, 25 ℃), because of low solubility, easy to crystallize, used in organic synthesis and biochemical research. Wheat, corn and other starches are enzymatically fermented by safe and appropriate food-grade hyperosmotic yeasts such as Saccharomyces spp., Candida liposum or Trichosporons at high concentrations, and the fermented mash is sterilized by heating and filtered It is then purified by ion exchange resin, activated carbon and ultrafiltration, crystallized, washed and dried. [0003] But, in the prior art, owing to there is following shortcoming in traditional erythritol fermented liquid: [0004] ...

AI Technical Summary

Problems solved by technology

[0004] 1. The extraction period is long;

[0005] 2. Traditional ultrafiltration requires secondary investment in equipment, and the cost of equipment is high;

[0006] 3. It is easy to produce a large amount of crystal scale during cooling, and in order to control crystal scale, the general process adopts forced circulation and slow cooling. The general cooling time is 15h / batch, and the cooling efficiency is low;

[0007] 4. Secondary melting and shrinkage is required, traditional process fermentation liquid→ceramic membrane filtration→ultrafiltration membrane filtration→primary concentration→cooling crystallization→centrifugation→decolorization→secondary concentration→cooling crystallization→centrifugation→drying and packaging, with many process control points