Method for preparing high-concentration fructose syrup

A fructose syrup, high-concentration technology, applied in the direction of fructose production, sugar production, glucose production, etc., can solve the problems of affecting the sweetness and taste of invert sugar, complicated process, etc., to ensure the appearance, simplify the process, and the method is simple and convenient Effect

Active Publication Date: 2010-05-19
ANHUI BBCA FERMENTATION TECH ENG RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, if the product is not approved by H + , OH - The treatment of ion exchange resin removes impurities such as ash and pigment, and the product will contai

Method used

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  • Method for preparing high-concentration fructose syrup

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Embodiment 1

[0034] Sucrose solution 500mL (sucrose concentration 48.73%, light transmittance measured at 420nm 45.4%), add 0.2% (m / v, 1.02g) concentrated sulfuric acid (pure) and 0.05% (m / v) powdered activated carbon of sucrose solution , the hydrolysis reaction was carried out at 75°C for 30 minutes, and the hydrolysis rate of sucrose was 99.32% (the light transmittance of the syrup was 76.9%, and the fructose content was 49.96%).

[0035] The syrup passes through the D315 anion exchange resin, the feed rate is 2BV / h, and the feed amount is 35BV, to remove acid radicals and a small amount of pigment, and to detect SO in the syrup 4 2- Concentration, SO 4 2- ≤100ppm; then pass through 732 cation exchange resin, the feed rate is 4BV / h, the feed amount is 80BV, adjust the pH value to 6.0~6.5, Ca 2+ , Mg 2+ The concentration is lower than 10ppm, and the fructose syrup with a concentration of 50.74% is obtained.

Embodiment 2

[0037] Sucrose solution 1000mL (sucrose concentration 59.32%, light transmittance measured at 420nm 44.7%), add 0.5% (5.1g) of concentrated sulfuric acid (pure) and 0.8% powdered activated carbon, hydrolyze at 50°C, hydrolyze 15 , 30, and 45 minutes, the hydrolysis rates of sucrose were 97.02%, 99.78%, and 99.84%, respectively.

[0038]The syrup passes through the D301 type anion exchange resin, the feed rate is 2BV / h, the feed amount is 40BV, the acid radical and a small amount of pigment are removed, and the SO in the syrup is detected 4 2- Concentration, SO 4 2- ≤100ppm; then pass through 734 cation exchange resin, the feed rate is 5BV / h, the feed amount is 80BV, adjust the pH value to 6.5~6.8, Ca 2+ , Mg 2+ The concentration is lower than 10ppm, and the fructose syrup with a concentration of 61.97% is obtained.

Embodiment 3

[0040] Sucrose solution 20L (sucrose concentration 51.26%, transmittance 43.5%, Ca 2+ , Mg 2+ Concentrations are 64ppm, 11ppm), add 0.5% (102g) concentrated sulfuric acid (pure) and 0.4% powdered activated carbon, hydrolyze at 60°C for 60min, the hydrolysis rate of sucrose is 99.47%.

[0041] The syrup passes through 900mL of D315 type anion exchange resin with a feed rate of 2BV / h and a feed volume of 38BV, and then passes through 200mL of 732 cation exchange resin with a feed rate of 5BV / h and a feed volume of 100BV to adjust the pH value To 6.7-7, fructose syrup is obtained.

[0042] Concentration of fructose syrup is 53.06%, pH is 6.8, SO 4 2- Concentration≤125ppm, Ca 2+ , Mg 2+ The concentration is lower than 5ppm, and the light transmittance is 91.7%.

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Abstract

The invention relates to a method for preparing high-concentration fructose syrup by hydrolyzing sucrose, which comprises the following steps: (1) decolorizing a high-concentration sucrose solution by using acid with dosage accounting for 0.1-1.0% of the high-concentration sucrose solution as the hydrolyst while adding 0.05-0.8% of powder active carbon, and carrying out the reaction at 50-80 DEG C for 15-75 minutes to obtain the high-concentration fructose syrup of which the concentration is more than or equal to 45%, wherein the degree of hydrolysis is more than or equal to 97%; (2) and removing acid radicals and a small amount of pigments in the fructose syrup by using weak-base anion-exchange resin, and removing cations by using a strong-acid cation exchange resin, thereby adjusting the pH value of the fructose syrup. Compared with the exisiting method, the method of the invention is simple and convenient. Through deep research into the hydrolysis conditions, the invention provides the hydrolysis conditions capable of ensuring the hydrolysis effect and reducing the production cost. In addition, the invention carries out the hydrolysis and the decoloring synchronously, thereby ensuring the appearance of the syrup and simplifying the production technology. Then, the acid radicals and the cations in the syrup are removed by using anion and cation exchange resins, thereby obtaining the qualified high-concentration fructose syrup.

Description

technical field [0001] The invention belongs to the technical field of food chemical industry, and in particular relates to a preparation method of high-concentration fructose syrup. Background technique [0002] High fructose syrup is a starch sugar crystal made by hydrolysis and isomerization of plant starch. It has a unique flavor and is an important sweetener. Because its composition is mainly fructose and glucose; it is called "fructose syrup". Fructose syrup is mainly made by hydrolyzing starch into glucose, and then isomerizing part of the glucose with enzymes. Its fructose content is about 42%, and its sweetness is equivalent to that of sucrose. [0003] With the tight supply of fossil energy on a global scale, the development of the corn deep processing industry represented by corn starch has caused many adverse effects, especially the issue of food security has attracted widespread attention from the international community. Therefore, in addition to using starch...

Claims

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Application Information

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IPC IPC(8): C13K1/00C13K11/00
Inventor 李荣杰薛培俭尚海涛黄之文吴真
Owner ANHUI BBCA FERMENTATION TECH ENG RES
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