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Method for preparing high-purity sorbitol and daily-chemical-grade sorbitol

A technology of sorbitol and daily chemical grade, which is applied in the field of preparing high-purity sorbitol and daily chemical grade sorbitol, which can solve the problems of complex process, large equipment investment and production cost, and achieve simple production process and high raw material utilization rate The effect of high and low equipment investment

Inactive Publication Date: 2015-09-16
ZHEJIANG HUAKANG PHARMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The technology of separating and purifying glucose by nanofiltration is mentioned in the above-mentioned several patent documents. This technology has also been widely used in the production of starch sugar, and has also made great progress compared with the traditional technology. However, if the technology is used Nanofiltration separates and purifies glucose to produce high-purity sorbitol and daily chemical grade sorbitol. The process is relatively complicated, especially in the hydrogenation process. High-purity sorbitol and daily chemical grade sorbitol need to be hydrogenated separately, and the process after hydrogenation is also It needs to be operated separately, and the equipment investment and production cost are relatively large

Method used

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  • Method for preparing high-purity sorbitol and daily-chemical-grade sorbitol

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Experimental program
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Effect test

Embodiment 1

[0040] (1) Starch is formulated into starch milk of 20 degrees Baume (°Bé), and it is 10% Na with mass percent concentration. 2 CO 3 The solution adjusts the pH value of the starch milk to 5.8. Calculated on the basis of the dry matter of the starch milk, add 400g / t of high-temperature-resistant α-amylase (purchased from Novozymes, Liquozyme Supra), and heat at 108°C Liquefaction is carried out to obtain a liquefied liquid.

[0041] (2) The pH value of the liquefied liquid is adjusted to 4.2 with hydrochloric acid with a mass fraction of 30%. Calculated on the dry matter of starch milk, add 450g / t compound enzyme preparation (purchased from Novozymes, trade name: DextrozymeDX), at 60 Saccharification at ℃ for 48 hours to obtain a saccharification solution with a glucose purity of 95.5%.

[0042] (3) First use a vacuum drum filter to filter the saccharification solution to remove protein, add 0.2% activated carbon according to the dry matter of starch milk, and decolorize at ...

Embodiment 2

[0049] (1) Starch is mixed with the starch milk of 20.5 degrees of Baume (°B é), and it is 10% Na with mass percent concentration 2 CO 3 The pH value of the starch milk was adjusted to 6.0 by the solution. Calculated based on the dry matter of the starch milk, 400 g / t of high temperature-resistant α-amylase (purchased from Novozymes, Liquozyme Supra) was added, and the temperature was increased at 108°C. Liquefaction is carried out to obtain a liquefied liquid.

[0050] (2) The pH value of the liquefied liquid is adjusted to 4.3 with hydrochloric acid with a mass fraction of 30%. Calculated on the dry matter of starch milk, add 460g / t compound enzyme preparation (purchased from Novozymes, trade name: DextrozymeDX), at 60 Saccharification at °C for 48 hours to obtain a saccharification solution with a glucose purity of 95.8%.

[0051] (3) First filter the saccharification solution with a plate and frame filter to remove protein, add 0.2% activated carbon according to the dry ...

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Abstract

The invention discloses a method for preparing high-purity sorbitol and daily-chemical-grade sorbitol, wherein the method includes the following steps: (1) carrying out a catalytic hydrogenation reaction on a saccharification liquid, to obtain a sorbitol solution having the sorbitol purity of not less than 90.0%; (2) purifying the sorbitol solution by a nanofiltration membrane, to obtain a sorbitol purified liquid having the sorbitol purity of not less than 97.0% and a sorbitol intercepted liquid having the sorbitol purity of not less than 70.0%; and (3) post-processing the sorbitol purified liquid, to obtain the high-purity sorbitol; and post-processing the sorbitol intercepted liquid, to obtain the daily-chemical-grade sorbitol. The method for preparing the high-purity sorbitol and the daily-chemical-grade sorbitol adopts the nanofiltration separation technology for purification of the sorbitol solution, the production process is simple, the equipment investment is low, no by-products are generated, and resources are fully efficiently utilized.

Description

technical field [0001] The invention relates to the technical field of starch deep processing, in particular to a method for preparing high-purity sorbitol and daily chemical grade sorbitol. Background technique [0002] Sorbitol, alias sorbitol, molecular formula is C 6 h 14 o 6 , the molecular weight is 182.17. Sorbitol is white hygroscopic powder, crystalline powder, flakes or granules. [0003] Sorbitol is divided into VC grade, daily chemical grade and food grade. It is a widely used chemical raw material. It is widely used in food, daily chemical, pharmaceutical and other industries. It can be used as sweetener, moisturizer, Preservatives, preservatives, etc., while having the nutritional advantages of polyols, namely low calorific value, low sugar, anti-caries and other effects. [0004] VC-grade sorbitol and some food-grade sorbitol have higher requirements on the purity of sorbitol. Generally, the purity of sorbitol (that is, the mass ratio of sorbitol to solid...

Claims

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Application Information

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IPC IPC(8): C07C31/26C07C29/141C07C29/76
CPCC07C29/141C07C29/76C07C31/26
Inventor 陈德水徐小荣廖承军郑毅毛宝兴黄小玲王红艳张雪娟
Owner ZHEJIANG HUAKANG PHARMA
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