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A method for preparing cabbage red pigment from purple cabbage

A technology of red pigment and cabbage, which is applied in the field of preparing cabbage red pigment, can solve the problems of strong odor of the product, inhibition of the application field of cabbage red pigment, poor solubility of cabbage red pigment, etc., and achieve the effect of good solubility and high purity

Active Publication Date: 2011-12-14
CHENGUANG BIOTECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional preparation method is to use the leaves of cruciferous and purple cabbage, extract them with weakly acidic water, refine, concentrate, sterilize, and then spray dry. The obtained cabbage red pigment has poor solubility and relatively strong odor. Inhibited the field of application of cabbage red pigment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Example 1: Using 100 kg of purple cabbage as raw material, after washing and inactivating enzymes, it was extracted with acidic water, adjusted to pH=3.0 by adding citric acid, and extracted at room temperature for 5 hours. The weight ratio of extraction material to liquid was 1:4. For 3 times. 900 liters of the obtained extract was poured into a precipitation tank, 0.9 kg of polysaccharides were added, stirred evenly, and then allowed to stand for 1-2 hours, filtered with a precision filter, and the precipitate was discharged. 850 liters of filtrate is treated with macroporous resin, the adsorption speed is 1000 liters / hour, the adsorption time is 1 hour, the washing speed is 2000 liters / hour, the washing time is 3 hours, the back washing time is 2 hours, and then 75% ethanol Perform analysis at a speed of 1000 liters / hour and a time of 1.5 hours. After the analytical solution is filtered by a 0.22um ceramic membrane, it is concentrated using a nanofiltration membrane ...

Embodiment 2

[0011] Example 2: Using 500 kg of purple cabbage as raw material, after washing and inactivating enzymes, extract with acidic water, add citric acid to adjust its PH=3.0, and extract at room temperature for 5 hours. The weight ratio of extract to liquid is 1:4. For 3 times, 4250 liters of the extract is obtained into the precipitation tank, 4.5 kg of precipitant is added, stirred evenly, and then allowed to stand for 2 hours, filtered with a precision filter to discharge the sediment, 4000 liters of the filtrate is treated with macroporous resin, the adsorption speed is 1000 liters / hour, adsorption time of 5 hours, water washing speed of 2000 liters / hour, forward washing time of 3 hours, backwash time of 2 hours, analysis with 75% ethanol for analysis, speed of 1000 liters / hour, time After 1.5 hours, the analytical solution was filtered through a 0.22um ceramic membrane and concentrated using a nanofiltration membrane with a cutoff molecular weight of 200 Daltons to obtain 5 kg ...

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PUM

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Abstract

The invention relates to a method for preparing cabbage red pigment from purple cabbage. The method comprises the following steps: 1. blanching for inactivation: cleaning the purple cabbage and blanching for inactivating enzyme; 2. extraction: extracting with acid aqueous solution 2-3 times with each time lasting 1-3 hours, and collecting all extracts; 3. precipitant treatment: pumping the extracts into a precipitating tank, adding a precipitant, keeping standing and filtering for removing a precipitate; 4. resin treatment: obtaining the cabbage red pigment by macroporous resin adsorption, water washing, water backwashing, analysis and concentration; 5. ultrafiltration: filtering the cabbage red pigment with a ultrafiltration membrane; 6. concentration with a nanofiltration membrane: condensing with the nano-filtration membrane with the intercepted molecular weight of 200 dalton to obtain liquid cabbage red pigment; 7. microbe sterilization; and 8. spray drying to obtain powdered cabbage red pigment. The method for obtaining the cabbage red pigment has the advantages of high yield, high color number, good solubility and no odor.

Description

Technical field [0001] The invention relates to a method for preparing red cabbage pigment from purple cabbage. Background technique [0002] Pigments are widely used in food, feed, chemical, cosmetics, pharmaceuticals and other industries. Natural pigments are one of the most important additives in many industries and fields. Especially, they play a decisive role in the color and tone of food. With the improvement of quality awareness, synthetic pigments have gradually shown their disadvantages such as toxic and harmful, while natural pigments are directly derived from natural products, and extraction and refining do not bring any toxic substances, which has become a major research hotspot. And because most natural pigments contain ingredients that are beneficial to the human body, they also have a certain medical and health care effect, so they are very popular. [0003] Cabbage red is a natural pigment with natural color and moderate color tone. It has a variety of nutrients an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23L1/275C09B61/00A23L5/43
Inventor 连运河安晓东张建霞程远欣
Owner CHENGUANG BIOTECH GRP CO LTD