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Preparation method of corn starch

A corn starch and corn kernel technology, which is applied in animal feed, animal feed, application and other directions, can solve the problems of low yield of gluten protein powder, poor quality of products with soaking effect, and influence on the quality of refined starch milk, etc. The effect of safety assurance, productivity improvement, and quality improvement

Active Publication Date: 2012-05-16
COFCO GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the low yield of gluten protein powder in the existing corn starch preparation process and directly recycle the process water into the corn soaking process and germ and fiber washing process, the corn soaking effect and product Significantly poorer quality, which affects the quality of refined starch milk, provides a corn steeping effect that can both increase the yield of gluten protein powder and improve the recycling of process water to the corn steeping process and recycling to germ, fiber washing The starch washing effect of technology, the preparation method of the cornstarch that improves the quality of refined starch milk

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] This embodiment is used to illustrate the preparation method of cornstarch provided by the present invention.

[0037] (1) Raw material pretreatment

[0038] Corn raw material (moisture content 14% by weight) is transported by the bucket elevator into the initial cleaning screen, iron remover, plane rotary cleaning screen for screening, stone removal, magnetic separation and other purification processes;

[0039] (2) Soaking

[0040] After the purified corn is measured, it is transported to the soaking system by hydraulic power, and then countercurrently soaked with sulfurous acid aqueous solution. There are 10 soaking tanks, and 50 tons of the above-mentioned purified corn raw materials are respectively added to the 10 soaking tanks, the soaking time is 48 hours, and the soaking temperature is 50±2°C;

[0041] (3) Degermination

[0042] The soaked corn enters the wet corn storage hopper through the wet corn conveying pump through the stone remover, and then enters t...

Embodiment 2

[0055] This embodiment is used to illustrate the preparation method of cornstarch provided by the present invention.

[0056] Prepare cornstarch according to the method for embodiment 1, difference is, in starch milk refining process:

[0057] (1) Process water obtained by concentrating 1000 L of gluten water [insoluble protein concentration: 1.96% (m / v)] was placed in a reaction vessel.

[0058](2) dissolving the polyacrylic acid flocculant with a number average molecular weight of 8 million in water to obtain a solution with a mass volume ratio concentration of 0.05%; polyaluminum chloride (n is 1-5, m≤10, basicity B=n / 6×100%) is dissolved in water to prepare a polyaluminum chloride solution with a concentration of 5% by mass to volume. And at 40 DEG C, add above-mentioned two kinds of flocculant aqueous solutions to the process water obtained after the above-mentioned gluten water is concentrated, the consumption (25L) of described polyacrylic acid flocculant aqueous solut...

Embodiment 3

[0062] This embodiment is used to illustrate the preparation method of cornstarch provided by the present invention.

[0063] Prepare cornstarch according to the method of Example 1, the difference is that when the process water obtained after the gluten water is concentrated is subjected to protein separation, the amount (30L) of the sodium polyacrylate flocculant aqueous solution makes the sodium polyacrylate flocculant The amount in process water is 15ppm, and the consumption (0.9L) of described polyaluminum chloride flocculant aqueous solution in process water makes the amount of polyaluminum chloride flocculant be 45ppm, and the dry matter content of the water obtained after filtering is 1.32% by weight . The filter cake was dried at 90°C to obtain a protein content of 61% (m / m) in the feed.

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Abstract

The invention relates to a preparation method of corn starch. The method comprises: smashing immersed niblets so as to separate germs, subjecting degermed corn-bran and endosperm-containing niblet tissues to grinding so as to separate fiber, separating the obtained crude starch milk so as to obtain gluten water and starch milk, and washing the starch milk. Specifically, the gluten water is then concentrated to obtain a concentrate and process water containing insoluble protein. The process water is then mixed with a flocculating agent solution for floatation separation. The flocculating agent involved is a material able to make insoluble protein in the process water flocculate and / or subside. The method of the invention can make the insoluble protein and water in the process water effectively separated, thus substantially enhancing the yield of gluten protein powder. In addition, the protein flocculated process water can be reused to immerse corn and wash germs and fiber cyclically, basically can reach the immersion and washing effects of fresh water, and substantially improves the quality of refined starch milk.

Description

technical field [0001] The invention relates to a preparation method of corn starch. Background technique [0002] The extraction process of starch is the process of separating the main components of corn kernels. There are two types of separation of the components of corn kernels: dry method and wet method, and the main separation operation is grinding. Therefore, there are dry grinding and wet grinding. . Wet milling is a common process in the current corn starch industry. It is mainly the process of crushing, degerming, fine grinding and sieving corn after soaking to separate the germ and fiber slag to obtain crude starch milk. After the starch is extracted through the grinding and sieving process, the obtained starch milk is still coarse starch milk, which still contains a large amount of insoluble protein and soluble substances, and the concentration of the powder slurry is relatively thin, so it needs to be refined and concentrated to provide pure refined starch for f...

Claims

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Application Information

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IPC IPC(8): C08B30/02C08B30/04C08B30/10A23K1/14
Inventor 岳国君郝小明徐兆勇艾永平娄新建罗虎诰培王旭鲁艳秋高占争孙本军孙长友
Owner COFCO GROUP
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