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Method for utilizing potassium permanganate to reduce content of SO2 in edible corn starch

A technology of potassium permanganate and corn starch, applied in the field of edible corn starch, can solve the problems of increasing resource consumption and increasing sewage discharge in production links, and achieve the effect of reducing consumption, energy consumption and sewage discharge

Active Publication Date: 2013-08-14
甘肃昆仑生化有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the national standard of edible corn starch on residual SO 2 There are strict restrictions, specifically defined as ≤30mg / Kg. The existing methods for producing corn starch mainly control the SO in starch by increasing the strength of starch washing, that is, increasing the proportion of starch washing water. 2 However, excessive washing water consumption not only increases resource consumption, but also causes a significant increase in sewage discharge in the production process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037]1) Prepare potassium permanganate solution with a concentration of 1%;

[0038] 2) The measured bottom flow of refined starch milk is 23m 3 / h, the percentage of dry matter in the bottom flow refined starch milk is 35%, and the starch milk density is 1157kg / m 3 , the measured sulfur dioxide content per kilogram of refined starch milk is 42mg, and the sulfur dioxide content per kilogram of refined starch milk exceeds 12mg compared with the standard content of 30mg. The sulfur dioxide content per kilogram of refined starch milk is reduced from 42mg to 30mg. The addition ratio of potassium permanganate is 0.12g, that is, the value of A in the formula is 0.12;

[0039] Calculate the mass flow L that needs to add potassium permanganate solution in every kilogram of refined starch milk:

[0040] L=[(L 淀粉乳 ×ρ 淀粉乳 ×G 淀粉乳 ×A)÷C 高锰酸钾 ]÷1000,

[0041] =[(23×1157×35%×0.12) ÷ 1%] ÷ 1000

[0042] =111.77 kg / hr

[0043] It is calculated that the mass flow rate of the prepare...

Embodiment 2

[0047] 1) Prepare potassium permanganate solution with a concentration of 5%;

[0048] 2) The measured bottom flow of refined starch milk is 21m 3 / h, the percentage of dry matter in the bottom flow refined starch milk is 33%, and the starch milk density is 1147kg / m 3 , the measured sulfur dioxide content per kilogram of refined starch milk is 36mg, and the sulfur dioxide content per kilogram of refined starch milk exceeds 6mg compared with the standard content of 30mg. The sulfur dioxide content per kilogram of refined starch milk is reduced from 36mg to 30mg. The addition ratio of potassium permanganate is 0.06g, that is, the value of A in the formula is 0.06;

[0049] Calculate the mass flow L that needs to add potassium permanganate solution in every kilogram of refined starch milk:

[0050] L=[(L 淀粉乳 ×ρ 淀粉乳 ×G 淀粉乳 ×A)÷C 高锰酸钾 ]÷1000,

[0051] =[(21×1147×33%×0.06) ÷ 5%] ÷ 1000

[0052] =9.538 kg / hr

[0053] It is calculated that the mass flow rate of the prepared...

Embodiment 3

[0057] 1) Prepare potassium permanganate solution with a concentration of 3%;

[0058] 2) The measured bottom flow of refined starch milk is 22 m 3 / h, the percentage of dry matter in the bottom flow refined starch milk is 36%, and the starch milk density obtained by looking up the table is 1163 kg / m 3 , the measured sulfur dioxide content per kilogram of refined starch milk is 39 mg, and the sulfur dioxide content per kilogram of refined starch milk exceeds the standard content of 30 mg by more than 9 mg. The sulfur dioxide content per kilogram of refined starch milk is reduced from 39 mg to 30 mg. The addition ratio of potassium permanganate is 0.09g, that is, the value of A in the formula is 0.09;

[0059] Calculate the mass flow L that needs to add potassium permanganate solution in every kilogram of refined starch milk:

[0060] L=[(L 淀粉乳 ×ρ 淀粉乳 ×G 淀粉乳 ×A)÷C 高锰酸钾 ]÷1000,

[0061] =[(22×1163×36%×0.09) ÷ 3%] ÷ 1000

[0062] =27.633kg / hr

[0063] It is calculated ...

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Abstract

The invention discloses a method for utilizing potassium permanganate to reduce a content of SO2 in edible corn starch. The method comprises the following steps: preparing a potassium permanganate solution; detecting the content of sulfur dioxide in a kilogram of fine starch milk; according to the flow of washing base flow of the fine starch milk and the percentage of the content of dry matters in the base flow of the fine starch milk, calculating a mass flow of the potassium permanganate solution added for reducing the content of sulfur dioxide in a kilogram of fine starch milk to be in a standard scope; adding the potassium permanganate solution in the fine starch milk and oxidizing the remained sulfur dioxide, thereby obtaining the fine starch milk after being processed; and according to the ratio of starch to washing water of 2.5:1, washing the fine starch milk after being processed with water. According to the method provided by the invention, food additives are added in the finestarch milk, the sulfur dioxide is oxidized, the content of the sulfur dioxide in the fine starch milk is reduced, the content of the sulfur dioxide meets the national standard of corn starch, the resource consumption is efficiently reduced and the environmental pollution is reduced.

Description

technical field [0001] The invention belongs to the technical field of edible corn starch, and relates to a method for improving the quality of edible corn starch by using food additives, in particular to a method for reducing SO in edible corn starch by using potassium permanganate 2 content method. Background technique [0002] To produce corn starch by wet milling, it is necessary to add a certain amount of sulfurous acid solution in the soaking process of corn to reduce the connection strength of the various tissue structures of corn grains, so as to break and separate corn grains, and to prevent rancidity of materials in the production system. In the starch refining process, most of the sulfurous acid added can be removed by volatilization and washing, but there is still a certain amount of sulfurous acid remaining, which is expressed as sulfur dioxide (SO 2 ) into the final starch product. Due to the national standard of edible corn starch on residual SO 2 There are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B30/04
Inventor 黄小兵白平李文静刘忠扣
Owner 甘肃昆仑生化有限责任公司