Method for preparing eutectic xylitol

A technology of xylitol and co-crystal, applied in the field of preparation of co-crystal xylitol, can solve the problems of xylitol being easy to absorb moisture and cannot be stored, frequent mechanical surface cleaning, unsuitable for gum sugar, etc. , easy operation, high product quality effect

Active Publication Date: 2010-06-02
SHANDONG FUTASTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The invention provides a preparation method of eutectic xylitol, which can solve the problems existing in the prior art that xylitol is easy to absorb moisture and cannot be stored, and is difficult to compress, resulting in

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  • Method for preparing eutectic xylitol

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Embodiment 1

[0050] A preparation method of co-crystal xylitol, comprising a xylitol liquid preparation part and a co-crystal xylitol preparation part, the specific steps are as follows:

[0051] 1. Preparation of xylitol liquid:

[0052] 1) Hydrolysis: Send the cleaned corncobs into a hydrolysis tank, add dilute sulfuric acid and pass steam for hydrolysis, control the hydrolysis temperature to 120°C, the concentration of dilute sulfuric acid to 1.5%, and the hydrolysis time for 4 hours to obtain xylose hydrolyzate;

[0053] 2) primary refining: use activated carbon to remove the pigment in the xylose hydrolyzate, then enter the plate and frame filter and ion exchange column to absorb and remove impurities in turn to obtain a refined primary xylose purification solution with a mass percentage concentration of 5% and a conductivity of 5%. 200us / cm, light transmittance 75%;

[0054] 3) One-time evaporation and concentration: use three-effect evaporation and concentration equipment to carry ...

Embodiment 2

[0064] A preparation method of co-crystal xylitol, comprising a xylitol liquid preparation part and a co-crystal xylitol preparation part, the specific steps are as follows:

[0065] 1. Preparation of xylitol liquid:

[0066] 1) Hydrolysis: Send the cleaned corncobs into a hydrolysis tank, add dilute sulfuric acid and pass steam for hydrolysis, control the hydrolysis temperature to 110°C, the concentration of dilute sulfuric acid to 1%, and the hydrolysis time for 2 hours to obtain xylose hydrolyzate;

[0067] 2) primary refining: use activated carbon to remove the pigment in the xylose hydrolyzate, then enter the plate and frame filter and ion exchange column to absorb and remove impurities in turn, to obtain a refined primary xylose purification solution with a concentration of 4% by mass and a conductivity of 4%. 100us / cm, light transmittance 70%;

[0068] 3) One-time evaporation and concentration: use three-effect evaporation and concentration equipment to carry out one-t...

Embodiment 3

[0078] A preparation method of co-crystal xylitol, comprising a xylitol liquid preparation part and a co-crystal xylitol preparation part, the specific steps are as follows:

[0079] 1. Preparation of xylitol liquid:

[0080] 1) Hydrolysis: Send the cleaned corncobs into a hydrolysis tank, add dilute sulfuric acid and pass steam for hydrolysis, control the hydrolysis temperature to 130°C, the concentration of dilute sulfuric acid to 2%, and the hydrolysis time for 6 hours to obtain a xylose hydrolyzate;

[0081] 2) primary refining: use activated carbon to remove the pigment in the xylose hydrolyzate, then enter the plate and frame filter and ion exchange column to absorb and remove impurities in turn to obtain a refined primary xylose purification solution with a mass percentage concentration of 6% and an electrical conductivity of 6%. 300us / cm, light transmittance 80%;

[0082] 3) One-time evaporation and concentration: using three-effect evaporation and concentration equip...

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Abstract

The invention provides a method for preparing eutectic xylitol, which can solve the problems of complex process caused by easy absorption of moisture and difficult storage and compression, inapplicability for preparing gum confection and tabletting, high equipment investment cost, high energy consumption, and frequent and difficult cleaning because crystals are easily adhered to the surface of a machine in the prior art. The invention adopts the technical scheme that the method comprises the following steps: firstly, preparing xylitol solution according to the steps of hydrolyzing, primary refining, primary evaporation and concentration, secondary refining, secondary evaporation and concentration, hydrogenation, refining and concentration; then mixing sorbitol solution and the xylitol solution, concentrating the mixture in vacuum, and smelting and crystallizing the mixture in a double-conical powder mixing crystallizer; and drying, crushing, screening and packing the mixture. The eutectic xylitol overcomes the defects of easy moisture absorption and difficult compression of the xylitol, is more suitable for preparing the gum confection and tabletting, expands the application rangeof the xylitol, and has better economic benefit and social meanings.

Description

technical field [0001] The invention belongs to the field of production technology of xylitol, in particular, relates to a preparation method of co-crystal xylitol. Background technique [0002] Xylitol is a white crystal obtained from materials containing pentosan, such as corncobs, bagasse, cottonseed hulls, and birch, through hydrolysis, purification, hydrogenation, concentration, crystallization, centrifugation, and drying. . It is easily soluble in water, and its sweetness is equivalent to that of sucrose. It can be eaten and has a refreshing feeling in the mouth. At the same time, it also has special biochemical properties, such as being directly absorbed by the human body through the cell wall without insulin, and has the functions of lowering blood lipids and anti-ketone bodies, etc. It can also adjust the pH value of oral gums and resist the fermentation of oral microorganisms. Special anti-caries function. Therefore, xylitol is not only a substitute for daily su...

Claims

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Application Information

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IPC IPC(8): C07C31/18C07C29/78
Inventor 田强金树人靖红兵王成福孙小丁张兴秀
Owner SHANDONG FUTASTE
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