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Method for extracting corn flavochrome by microwave-ultrasonic

A corn yellow pigment and ultrasonic technology, applied in the field of corn yellow pigment, can solve the problems of difficult industrial production, low pigment yield, long extraction time, etc., and achieve the effects of low toxicity, short extraction time, and easy industrialization

Inactive Publication Date: 2008-10-08
HEILONGJIANG BAYI AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the methods for extracting zeaxanthin mainly include: as disclosed in No. 90105333 patent application, a single organic solvent such as propylene glycol or ethanol is used for one-time extraction, and the extraction time is long; as disclosed in No. 99106874 patent application, supercritical fluid technology is used to extract Corn yellow pigment has high extraction purity, but it is difficult to realize industrial production
In addition, the yield of pigments decreases by using strong acid and strong alkali extraction methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0011] Raw materials: corn gluten powder, a by-product of corn starch produced by wet process, with a particle size of 0.19 mm.

[0012] 1. Preparation of extractant: take 90% ethanol and petroleum ether at 60° C. to 90° C., mix them in a ratio of 1:1 (volume ratio), and prepare them for later use.

[0013] 2. Microwave-ultrasonic extraction: Weigh 10 g of corn gluten powder and extractant and mix them in a solid-liquid ratio of 1:6 (weight to volume ratio) and place them in a microwave-ultrasonic generator. Microwave power 600w, microwave treatment 50s, and then ultrasonic power 300w, ultrasonic treatment 30min, the temperature of the whole treatment process is controlled at 47°C; filter and collect the filtrate, evaporate the filtrate under reduced pressure at 35±5°C until there is no distillation The obtained orange-red paste was eluted with n-hexane, filtered to remove insoluble protein, dried in vacuum at 40±5°C to constant weight, weighed the crude extract, and calculate...

example 2

[0015] Raw materials: corn gluten powder, a by-product of corn starch produced by wet process, with a particle size of 0.25 mm.

[0016] 1. Preparation of extractant: take 95% ethanol and petroleum ether whose distillate is 60° C. to 90° C., mix them in a ratio of 1:1 (volume ratio), and set aside.

[0017] 2. Microwave-ultrasonic extraction: Weigh 10 g of corn gluten powder and extractant and mix them in a solid-liquid ratio of 1:13 (weight to volume ratio) and place them in a microwave-ultrasonic generator. The microwave power is 800w, and the microwave treatment is 30s, and then the ultrasonic power is 450w, and the ultrasonic treatment is 20min, and the temperature of the whole extraction process is controlled at 50°C. Finally, filter with suction and collect the filtrate. Evaporate the filtrate under reduced pressure at 35±5°C until there is no distillate. The obtained orange-red paste is eluted with n-hexane, filtered to remove insoluble protein, and vacuum-dried at 40±5...

example 3

[0019] Raw materials: corn gluten powder, a by-product of corn starch produced by wet process, with a particle size of 0.36 mm.

[0020] 1. Preparation of extractant: get 99% ethanol and petroleum ether with a distillate of 60° C. to 90° C., mix them in a ratio of 1:1 (volume ratio), and prepare them for later use.

[0021] 2. Microwave-ultrasonic extraction: Weigh 10 g of corn gluten powder and extractant and mix them with a solid-liquid ratio of 1:15 (weight to volume ratio) and place them in a microwave-ultrasonic generator. The microwave power was 1000w, and the microwave treatment was 20s, and then the ultrasonic power was 600w, and the ultrasonic treatment was 40min, and the temperature of the whole extraction process was controlled at 52°C. Finally, filter with suction and collect the filtrate. Evaporate the filtrate under reduced pressure at 35±5°C until there is no distillate. The obtained orange-red paste is eluted with n-hexane, filtered to remove insoluble protein,...

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Abstract

The invention discloses a method to extract corn yellow pigment with microwave-ultrasonic extraction; the method combines the microwave technology with the ultrasonic technology, and uses over 90% ethanol and petroleum ether mixed solution at 60-90 DEG C as the extractant to extract the yellow pigment from the corn gluten meal of the by-product of corn starch production through wet process; the particle size of raw materials is 0.19-0.36mm; the ratio of the mixed solution of the extractant between ethanol and petroleum is 1:1 (volume ratio) ether, and the liquid material ratio is (6-15):1 (volume-to-weight ratio); the microwave power is 600w to 1,000w, and the processing time is 5s to 100s, and the temperature is 47 to 57 DEG C; the ultrasonic power is 300w to 600w and the processing time is 10min to 40min, and the temperature is 47 to 57 DEG C; the filtrate is decompressed and evaporated at 30 to 40 DEG C to get orange-red paste which is processed with n-hexane elution and filtered to remove insoluble protein, an then dried to constant weight in vacuum at 35 to 45 DEG C to weigh and calculate the extraction rate. The method has low toxicity of extractant and high yield of extracts, which solves the problem of long extraction time by the original method and is easy to be industrialized.

Description

1. Technical field [0001] The invention relates to the deep processing of by-products of agricultural products, specifically a method for extracting zeaxanthin, which is not only a food coloring but also a health food, using the by-product corn yellow powder (protein powder) produced in the production of corn starch as a raw material. 2. Background technology [0002] Carotenoids in corn mainly include lutein, zeaxanthin, β-cryptoxanthin, α-carotene, β-carotene, neoxanthin, and troutaxanthin. Studies have shown that in animals and plants, some carotenoids exist in the form of protein binding. In 1962, Blessin's research confirmed that carotenoid-protein exists in the form of complex in maize. In the process of producing corn starch using corn as raw material, carotenoids are separated along with protein and enriched in the by-product corn yellow powder. The content of carotenoids in corn yellow powder varies with the protein content. In corn yellow powder with a protein co...

Claims

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Application Information

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IPC IPC(8): C09B61/00
Inventor 曹龙奎包鸿慧周睿鹿保鑫
Owner HEILONGJIANG BAYI AGRICULTURAL UNIVERSITY
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