Process of extracting mannitol using glucose mother liquid

Abstract

The process of preparing mannitol with glucose mother liquor includes the following steps: 1. diluting glucose mother liquor A and nanometer filtering to obtain component B with rich glucose and component C with rich oligose; 2. saccharifying the component C, merging with mother liquor A and repeating the steps 1 and 2; 3. decomposing and concentrating component B and epimerizing to obtain mixed liquid D of glucose and mannose; 4. adding glucose crystal seed into the mixed liquid D for crystallizing to obtain wet crystal and glucose liquid E; 5. isomerizing the glucose liquid E with glucose isomerase column to obtain mannose, glucose and fructose mixture liquid F; 6. mixing the mixture liquid F and crystallized fructose mother liquid and hydrogenation reaction to obtain mixture alcohol G; and 7. filtering mixture alcohol G, decomposing concentrating, crystallizing, centrifuge separating and drying to obtain mannitol. The present invention has low production cost and high material utilizing rate.

Description

technical field [0001] The invention relates to a method for preparing hexahydric alcohol, in particular to a method for preparing mannitol from glucose mother liquor. Background technique [0002] Mannitol is a commonly used dehydrating drug and diuretic, which can reduce intracranial pressure and intraocular pressure, eliminate cerebral edema, diuresis and prevent early acute renal insufficiency. The preparation is mannitol injection. In the food industry, mannitol stearate is used in peanut pulp to prevent oil separation, used in biscuits to make biscuits crisp and not easy to be affected by moisture, used in candies to set the shape and improve the quality of candies. In daily chemicals, mannitol is used as an emulsifier in creams to make creams delicate. In engineering, it is an important material for heat preservation and sound insulation. [0003] There are mainly following methods for preparing mannitol in industry: [0004] 1. Kelp extraction method: Dried kelp c...

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Problems solved by technology

[0006] 3. Using fructose as raw material: after hydrogenation of fructose, a mixed alcohol of mannitol and sorbitol is obtained, and mannitol can be obtained by crystallization, with a theoretical yield of 50%, but the price of fructose is relatively high, and domestic production The technology of high-purity fructose is immature, so the production of mannitol from pure fructose or high-purity fructose does not meet the requirements of large-scale industrial production

[0009] 6. Using glucose as raw material: epimerizing glucose into mannose (the conversion rate is generally 27% to 33%) and hydrogenating invert sugar to obtain a mixture of about 30% mannitol and sorbitol, which is produced by crystallization To obtain mannitol products, this method has industrialized production equipment, but the yield is not high, only reaching 24% to 26%

But, in the method for preparing mannitol involved in the prior art, do not find the report of utilizing glucose mother liquor to prepare mannitol method