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A method for removing soluble starch in crude sucrose

A soluble and sucrose technology, applied in sucrose production, sugar production, sugar juice purification, etc., can solve the problems of expensive industrial operation equipment and membrane consumables, increased production cost of enzymes, poor removal effect, etc., to achieve cheap equipment and methods Simple and effective removal

Active Publication Date: 2021-02-19
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the perspective of implementation effect, the repeated recrystallization method not only takes a long time, but also has poor removal effect
Amylase hydrolysis and membrane filtration can effectively remove soluble starch in crude sucrose, but amylase hydrolysis will not only introduce new monosaccharide impurities such as glucose, but also consume a large amount of enzymes and greatly increase production costs; The industrial operation equipment and membrane consumables of the membrane filtration method are relatively expensive, which greatly limits its application in industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Using a mixed solution of absolute ethanol and water with a volume ratio of 2:3 as a solvent, dissolve crude sucrose in the solvent at 50°C to form a saturated solution; Centrifuge for 20 minutes; collect the centrifuged supernatant and recover ethanol in a vacuum at 50°C until no ethanol component can be detected in the residual liquid by gas chromatography. The solution after recovering ethanol is added with seed crystals, concentrated in vacuum at 65°C until the sugar brix is ​​above 80%, cooled and crystallized, separated and dried to obtain sucrose without soluble starch. The starch content of the sucrose was 0.157% as determined by the specific rotation method. The product is tested according to the method of "GB / T5009.8-2008 Determination of sucrose in food", and its sucrose content is 99.69%.

Embodiment 2

[0020] Using a mixed solution of absolute ethanol and water with a volume ratio of 1:1 as a solvent, under the condition of 65°C, dissolve the crude sucrose in the solvent to make a saturated solution; Centrifuge for 30 minutes; collect the centrifuged supernatant and recover ethanol in a vacuum at 60°C until no ethanol component can be detected in the residual liquid by gas chromatography. The solution after recovering ethanol is added with seed crystals, concentrated in vacuum at 70°C until the sugar brix is ​​above 80%, cooled and crystallized, separated and dried to obtain sucrose without soluble starch. The starch content of the sucrose was 0.108% as determined by the specific rotation method. The product is tested according to the method of "GB / T5009.8-2008 Determination of sucrose in food", and its sucrose content is 99.82%.

Embodiment 3

[0022] Using a mixed solution of absolute ethanol and water with a volume ratio of 3:2 as a solvent, dissolve crude sucrose in the solvent at 80°C to form a saturated solution; Centrifuge for 40 minutes; collect the supernatant after centrifugation and recover ethanol in a vacuum at 70°C until no ethanol component can be detected in the residual liquid by gas chromatography. The solution after recovering ethanol is added with seed crystals, concentrated in vacuum at 80°C until the sugar brix is ​​above 80%, cooled and crystallized, separated and dried to obtain sucrose without soluble starch. The starch content of the sucrose is 0.078% as determined by the specific rotation method. The product is tested according to the method of "GB / T5009.8-2008 Determination of sucrose in food", and its sucrose content is 99.91%.

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Abstract

The invention discloses a method for removing soluble starch in crude sucrose, which comprises the following steps: using a mixed solution of absolute ethanol and water as a solvent, preparing a saturated solution of crude sucrose, placing the saturated solution of crude sucrose in a centrifuge, and collecting The supernatant liquid and the supernatant liquid are recovered under reduced pressure to recover ethanol, then add seed crystals to concentrate under reduced pressure, crystallize, separate the crystals and dry to obtain the sucrose from which the soluble starch has been removed. Based on the solubility difference between sucrose and soluble starch, the invention adopts a simple and easy-to-industrialize method, and has outstanding effects of good removal effect and no generation of new impurities such as glucose.

Description

technical field [0001] The invention relates to the technical field of food processing, in particular to the purification of crude sucrose, in particular to a method for removing soluble starch in crude sucrose. Background technique [0002] At present, many countries and regions often adopt the interplanting of plants such as sugarcane, sweet potato, and potato to achieve the purpose of making full use of land and increasing income. However, this planting method will bring some interplanted sweet potatoes and potatoes into the machine harvesting and processing of sugarcane, so that soluble starch exists in the raw sucrose product. Soluble starch present in raw sucrose will affect the color and content of refined white sugar due to gelatinization at high temperature. In addition, a large amount of gelatinized starch will also deposit and firmly adhere to equipment such as crystallization tanks, which will affect normal production. Therefore, the effective removal of starch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C13B20/00C13B20/16C13B30/00C13B30/02
CPCC13B20/00C13B20/005C13B20/16C13B30/002C13B30/02
Inventor 熊清平石莹莹徐婷婷袁君张强华
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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