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Purplish red pigment preparation method with golden silk jujube

A technology of golden jujube and jujube red, applied in chemical instruments and methods, azo dyes, organic dyes, etc., can solve problems such as harm to human body, reduce environmental pollution, improve economic and social benefits, and achieve product stability good effect

Active Publication Date: 2009-10-14
QINGDAO PENGYUAN KANGHUA NATURAL PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most manufacturers use chemically synthesized pigments, which are more harmful to the human body.

Method used

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  • Purplish red pigment preparation method with golden silk jujube

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preparation example Construction

[0032] 2 Preparation of jujube red pigment aqueous solution

[0033] The jujube skin that has been taken off is put into an extraction tank with a porous mesh surface, rinsed and extracted with an alkaline aqueous solution of jujube skin: solution=1: 3-9, the pH of the alkaline aqueous solution is 9-12, Aqueous solution of jujube red pigment extracted through mesh surface

[0034] 3 Refining of the aqueous solution of jujube red pigment

[0035] Adjust the pH value of the jujube red pigment solution extracted from the mesh surface to neutral or slightly acidic, add flocculant / enzyme preparation 1-5‰, stir evenly, let stand for 1-10 hours, and filter the supernatant to obtain refined jujube red pigment aqueous solution

[0036] 4 Adsorption and separation

[0037] Put the refined red pigment solution on the resin adsorption column, and fill the adsorption column with macroporous resin specially adsorbing bougainvillea pigment, the feed flow rate is 20-60m3 / h, absorb saturate...

Embodiment 1

[0047]700 kg of semi-dry golden jujube, after cleaning, peel off the skin with a peeling machine, and transport the separated jujube skin into the extraction tank by conveyor belt, according to the volume of jujube skin: lye = 1: 3-9 Add the lye that has been adjusted, measure the pH value after stirring, add sodium hydroxide to adjust the pH value to 9-12, extract the filtrate after 12 hours of extraction and put it into another extraction tank, add the same volume of solution to adjust the pH value value, extract the filtrate, repeat the leaching three times, combine the three filtrates, and adjust the pH value to neutral. Add 1-5‰ flocculant to the jujube red pigment solution extracted from the mesh surface, stir evenly, let it stand for 1-5 hours, filter the supernatant to obtain a refined jujube red pigment aqueous solution, pass the filtrate directly through the column, and pass through the resin before the column Treatment: Before loading the column, soak the resin in 2...

Embodiment 2

[0049] 500 kg of semi-dry golden jujube, after cleaning, peel off the skin with a peeling machine, and transport the separated jujube skin into the extraction tank by conveyor belt, according to the volume of jujube skin: lye = 1: 3-9 Add the lye that has been adjusted, measure the pH value after stirring, add sodium hydroxide to adjust the pH value to 9-12, extract the filtrate after 12 hours of extraction and put it into another extraction tank, add the same volume of solution to adjust the pH value value, extract the filtrate, repeat the leaching three times, combine the three filtrates, and adjust the pH value to neutral. Add 1-5‰ flocculant to the jujube red pigment solution extracted from the mesh surface, stir evenly, let it stand for 1-5 hours, filter the supernatant to obtain a refined jujube red pigment aqueous solution, pass the filtrate directly through the column, and pass through the resin before the column Treatment: Before loading the column, soak the resin in ...

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Abstract

The invention discloses a purplish red pigment preparation method with golden silk jujube, a natural plant, as raw material. The method comprises the following steps of: obtaining golden silk jujube-cleaning-peeling-immersing and extracting with the alkaline aqueous solution-processing with enzyme preparation and edible flocculant-filtrating-filtrate passing a column-eluting with ethanol-saponifying-vacuum concentration-vacuum freezing drying or spraying drying-obtaining the product. The purplish red pigment is a pure natural pigment resource which can make up for the shortage of the existingnatural pigments and meet the demand in the industries of cosmetic, food, dying, and drink. The method has the advantages of advanced technique, good product stability, being non-toxic and odor-free,maximum and comprehensive use of the pigment of silk jujube, reducing the use of organic solvents, saving energy, reducing environment pollution caused by the waste water, simplifying production technique and significantly reducing production cost and increasing the economic benefits, thus obtaining good economic benefits and social benefits.

Description

technical field [0001] The invention relates to a method for preparing a substance by using natural plants as raw materials, in particular to a method for preparing bougainvillea pigment from the bark of jujube jujube of the natural plant. . Background technique [0002] With the country's strict requirements on the use of pigments in food, natural pigments will gradually replace synthetic pigments. In the production of cosmetics, food, dyes, and beverages, a large amount of red pigment is needed to increase the appearance and color of food. However, most manufacturers use chemically synthesized pigments, which are more harmful to the human body. [0003] The jujube red pigment extracted from the pure natural plant golden silk jujube is a relatively ideal natural pigment resource. It has high pigment content, excellent water solubility, clear and transparent solution, bright color, natural, and high safety. It is used in cosmetics, food , dyes, beverages, etc. have great ...

Claims

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Application Information

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IPC IPC(8): C09B61/00C12S3/00
Inventor 展鹏远
Owner QINGDAO PENGYUAN KANGHUA NATURAL PROD
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