Separation and purification process of wheat flour starch granule

A technology of wheat flour and starch granules, which is applied in food preparation, food science, application, etc., can solve the problem of lack of research on particle fraction separation, and achieve the effect of simple process, high efficiency and simple process flow

Inactive Publication Date: 2009-04-29
NANJING AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Separation and purification process of wheat flour starch granule
  • Separation and purification process of wheat flour starch granule

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1 Extraction of wheat flour starch granules

[0035] 1) Protein removal: refer to the national standard GB / T 14608-93, machine wash the flour with a gluten machine, separate the protein in the form of gluten, centrifuge at 2500×g for 10-20min, and discard the supernatant to obtain coarse starch;

[0036] 2) Washing: Suspend the coarse starch with 10 times the weight of deionized water, centrifuge at 2500×g for 10-20 minutes, discard the supernatant, repeat three times, and remove residual sodium chloride and water-soluble protein;

[0037] 3) Filtration I: Suspend the coarse starch with 10 times the weight of deionized water, pass the suspension through a 45 μm sieve, remove residual crude fibers and other large particles of impurities, collect and filter the coarse starch suspension, and centrifuge at 2500×g for 10-20min , discard the supernatant;

[0038] 4) Filtration II: Suspend the crude starch with 10 times the weight of absolute ethanol, pass the suspens...

Embodiment 2

[0040] Example 2 A-, the separation of B-type starch granules

[0041] Suspend the starch granules extracted from wheat flour according to claim 1 in deionized water at a mass volume ratio of 1:8 for precipitation for 1 hour, take 5 / 9 volume of the upper layer suspension, repeat nine times, and centrifuge the upper layer suspension at 2500 × g for 20 min to obtain the precipitate It is B-type starch granules, and the lower layer is A-type starch granules.

[0042]Experimental analysis shows that: every 1 kg of starch granules extracted from the wheat flour described in claim 1, 780.11 grams of A-type starch granules, 218.78 grams of B-type starch granules, A-type starch granules and B-type starch granules can be separated by using the technical solution. The yield ratio of starch granules was 3.9:1.1. The process basically has no loss, and the process flow is simple, easy to industrialize, and consumes less energy.

Embodiment 3

[0043] The classification of embodiment 3 A-type starch granules

[0044] At 0°C, suspend the A-type starch granule suspension in deionized water at a mass volume ratio of 1:60, pass through a 25 μm sieve, and use a wet and dry sieving machine to vibrate at 2800 times / min for 2 minutes to obtain Sieve starch granules G5, filter the suspension and pass through a 15.8 μm sieve, use a wet and dry sieving machine to shake at 2800 times / min for 5 minutes to obtain unsieved starch granules G4, filter the suspension and centrifuge at 2500×g for 20 minutes The resulting starch granules G3.

[0045] Experimental analysis shows: per 1 kg of A-type starch granules described in claim 2, starch granules G3, G4 and G5 can be separated by using the technical scheme to obtain 221.30, 507.61, and 266.14 grams respectively. The process flow is simple, easy to industrialize, and consumes energy. less.

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Abstract

The invention relates to a separation and purification process for wheat flour starch grains, which belongs to the field of farm product deep processing. The separation and purification process comprises the following three technological flows: purifying wheat flour starch grains; separating A- and B- starch grains; and subdividing the A- and B- starch grains, wherein the technological process of purifying the wheat flour starch grains is to wash off protein through a gluten washer, wash and filter through deionized water, and filter and refine through absolute ethyl alcohol; the technological process of separating the A- and B- starch grains is to precipitate the wheat starch grains suspending in the deionized water and take the suspension liquid on the upper layer; and the technological process of subdividing the A-, B- starch grains is to screen the A-, B- starch grains suspending in the deionized water through a sieve with certain specifications and use a sieving machine for oscillation. The separation and purification process has the extraction efficiency of wheat flour starch grains above 99 percent, and has the advantages of simple technological processes, and good repeatability and reproducibility, thereby enabling researchers and engineers to have an accurate understanding of the size characteristic of the starch grains and the impact of the size characteristic on related products. The product can be also applied to scientific research and industrial production.

Description

1. Technical field [0001] The invention relates to a process for separating and purifying wheat flour starch granules and belongs to the field of deep processing of agricultural products. Specifically, it is a process of extracting pure starch granules from wheat, then separating them into A- and B-type starch granules, and finally subdividing A- and B-type starch granules into different grades of starch granules. Workers and engineers have a more accurate understanding of the particle size characteristics of starch granules and their impact on related products. The final fractionated and purified starch granules can also be used in food processing, starch manufacturing, medicine, textiles, cosmetics and other industries according to their physical and chemical characteristics. 2. Background technology [0002] Wheat starch is a stored starch in the endosperm of wheat (Triticum aestivum L), a graminaceous plant. It exists in the endosperm cells in a granular state, accountin...

Claims

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Application Information

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IPC IPC(8): C08B30/04A23L1/09A23L29/30
Inventor 田益华张传辉姜东戴廷波荆奇曹卫星
Owner NANJING AGRICULTURAL UNIVERSITY
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