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Technology for extracting scarlet sage red pigment

An extraction process, red technology, applied in the direction of azo dyes, organic dyes, food preparation, etc., can solve the problems of complex extraction process, high extraction cost, easy to induce poisoning, etc., achieve simple extraction process, high purity of pigment, color natural effect

Inactive Publication Date: 2012-10-24
NANTONG HONGLIDA KNITTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two types of food coloring: natural and synthetic. Natural food coloring is directly extracted from animal and plant tissues and is harmless to the human body. Synthetic food coloring is made from aniline dyes separated from coal tar. , these synthetic pigments are easy to induce poisoning, diarrhea and even cancer, and are harmful to the human body, so they should not be used more or should not be used as much as possible.
The existing red pigment extraction process is relatively complicated and the extraction cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Add 60 milliliters of hydrochloric acid to 3000 milliliters of 90% ethanol, mix well and set aside, add 500 grams of a bunch of red corollas to a container with a lid, and then add 3 / 5 of the prepared ethanol-hydrochloric acid solution , cold soaking for 0.5 hour, and constantly stirring; filter after leaching, collect the filtrate for use, and cold soak the filter residue with the remaining amount of ethanol-hydrochloric acid solution prepared in the above steps for 2 hours, after filtering, mix the filtrate with the first impregnated Combine the filtrates; heat the combined filtrates to 70°C with a water bath, concentrate under reduced pressure until the volume is reduced to 1 / 3, then mix with 2 times the amount of 50% ethanol, stir slowly for half an hour, and let stand for 2 After hours, filter again, collect the filtrate, heat the filtrate in a water bath, recover ethanol after distillation and condensation, and concentrate the raffinate at 70°C under reduced pressu...

Embodiment 2

[0012] Add 605 milliliters of hydrochloric acid into 3200 parts of ethanol with a concentration of 93%, mix well and set aside, add 550 grams of a string of red corolla into a container with a lid, and then add 3 / 5 of the prepared ethanol-hydrochloric acid solution , cold immersion for 1 hour, and constantly stirring; filter after leaching, collect the filtrate for use, and use the remaining amount of ethanol-hydrochloric acid solution prepared in the above steps to cold immerse the filter residue for 2.5 hours. The filtrates were combined; the combined filtrates were heated to 75°C with a water bath, concentrated under reduced pressure until the volume was reduced to 1 / 3, then mixed with 3 times the amount of 52% ethanol, stirred slowly for half an hour, and then allowed to stand for 2.5 After hours, filter again, collect the filtrate, heat the filtrate in a water bath, recover ethanol after distillation and condensation, and concentrate the raffinate at 70°C under reduced pre...

Embodiment 3

[0014] Add 70 milliliters of hydrochloric acid to 3500 milliliters of ethanol with a concentration of 95%, mix well and set aside, add 600 milliliters of a string of red flower crowns into a container with a lid, and then add 3 / 5 of the prepared ethanol-hydrochloric acid solution , cold immersion for 1 hour, and constantly stirring; filter after leaching, collect the filtrate for use, and use the remaining amount of ethanol-hydrochloric acid solution prepared in the above steps to cold immerse the filter residue for 3 hours, after filtering, mix the filtrate with the first impregnated The filtrates were combined; the combined filtrates were heated to 75°C with a water bath, concentrated under reduced pressure until the volume was reduced to 1 / 3, and then mixed with 3 times the amount of 55% ethanol, stirred slowly for half an hour, and then allowed to stand for 3 After hours, filter again, collect the filtrate, heat the filtrate in a water bath, recover ethanol after distillati...

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PUM

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Abstract

The invention discloses a technology for extracting a scarlet sage red pigment. The technology is characterized in that fresh scarlet sage flowers as raw materials are subjected to cold immersion, filtration, distillation and reduced pressure concentration in the presence of ethanol and hydrochloric acid as extractants so that the scarlet sage red pigment is extracted. The scarlet sage red pigment extracted by the technology is a water-soluble and alcohol-soluble pigment, has high pigment purity and a natural color, and can be mainly used for coloring of various foods and cosmetics.

Description

technical field [0001] The invention relates to a method for extracting natural pigments, in particular to a process for extracting red pigments. Background technique [0002] Food coloring is a kind of pigment, which is a food additive that changes the original color of food to a certain extent. There are two types of food coloring: natural and synthetic. Natural food coloring is directly extracted from animal and plant tissues and is harmless to the human body. Synthetic food coloring is made from aniline dyes separated from coal tar. , These synthetic pigments are easy to induce poisoning, diarrhea and even cancer, and are harmful to the human body, so they should not be used more or should not be used as much as possible. The existing red pigment extraction process is relatively complicated and the extraction cost is high. Contents of the invention [0003] Purpose of the invention: In order to solve the deficiencies of the prior art, the present invention provides a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B61/00A23L1/275
Inventor 谷建通
Owner NANTONG HONGLIDA KNITTING
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