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Preparation method for natural haematochrome

A natural red pigment and red technology, applied in the field of food pigments, can solve the problems of low purity of pigments, many impurities, and application restrictions

Inactive Publication Date: 2014-04-09
NANTONG SHUANGHE FOOD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Red pigment has been used for many years as a commonly used pigment in the food field. Since most of the existing red pigment is extracted with organic solvents, there will be organic solvent residues after concentration in the later stage, which affects the safety of food consumption. At the same time, the organic solvent extraction The purity of the pigment is not high, and it contains many impurities, which greatly restricts its application. Therefore, it is necessary to develop a natural red pigment with higher safety and higher purity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A kind of preparation method of natural red pigment, prepare according to the following steps:

[0019] (1) Dry the natural Pyracantha in the sun, take 0.5kg of the dried Pyracantha and wash it, put it in an acid-resistant container, add 3kg of edible hydrochloric acid solution with a mass concentration of 0.3%, boil for 2 hours, and filter to remove the filtrate;

[0020] (2) Rinse the Hyacinth fruit filtered in step (1) with water, add 3 kg of sodium hydroxide solution with a mass concentration of 0.5%, soak at room temperature for 20 hours, filter, and collect the filtrate;

[0021] (3) Repeat step (2) to extract the fruit four times until the color of the fruit disappears;

[0022] (4) Combine the finally collected filtrates, boil and concentrate, add edible salt to the concentrated solution to produce a precipitate, centrifuge to separate the precipitate, dry and pulverize to obtain the natural red pigment.

Embodiment 2

[0024] A kind of preparation method of natural red pigment, prepare according to the following steps:

[0025] (1) Dry the natural Pyracantha in the sun, take 1 kg of the dried Pyracantha and wash it, put it in an acid-resistant container, add 8 kg of edible hydrochloric acid solution with a mass concentration of 0.5%, boil for 3 hours, and filter to remove the filtrate;

[0026] (2) Rinse the Hyacinth fruit filtered in step (1) with water, add 7 kg of sodium hydroxide solution with a mass concentration of 0.6%, soak at room temperature for 25 hours, filter, and collect the filtrate;

[0027] (3) Repeat step (2) to extract the fruit three times until the color of the fruit disappears;

[0028] (4) Combine the finally collected filtrates, boil and concentrate, add edible salt to the concentrated solution to produce a precipitate, centrifuge to separate the precipitate, dry and pulverize to obtain the natural red pigment.

Embodiment 3

[0030] A kind of preparation method of natural red pigment, prepare according to the following steps:

[0031] (1) Dry the natural Pyracantha in the sun, take 1 kg of the dried Pyracantha and wash it, put it in an acid-resistant container, add 10 kg of edible hydrochloric acid solution with a mass concentration of 0.6%, boil for 2 hours, and filter to remove the filtrate;

[0032] (2) Rinse the Hyacinth fruit filtered in step (1) with water, add 10 kg of sodium hydroxide solution with a mass concentration of 1%, soak at room temperature for 30 hours, filter, and collect the filtrate;

[0033] (3) Repeat step (2) to extract the fruit three times until the color of the fruit disappears;

[0034] (4) Combine the finally collected filtrates, boil and concentrate, add edible salt to the concentrated solution to produce a precipitate, centrifuge to separate the precipitate, dry and pulverize to obtain the natural red pigment.

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PUM

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Abstract

The invention discloses a preparation method for natural haematochrome. The method comprises the following steps: first, natural red fruits are dried in the sun; the dried red fruits are washed and placed in an acid resistant container; an edible hydrochloric acid solution is added, boiling is carried out; filtration is carried out and the filtrate is removed; then the filtrated fruits are washed in water; a sodium hydroxide solution is added, and the fruits are soaked at the room temperature; filtration is carried out and the filtrate is collected; the above steps are repeated, and the fruits are subjected to extraction until the color of the fruits disappears; finally, the collected filtrates are mixed and subjected to boiling and concentration, edible salt is added in the concentrated solution, and precipitates are generated; the precipitates are subjected to centrifugal separation, drying and crushing, and natural haematochrome is obtained. The natural haematochrome has a high purity, the lead content and the arsenic content are far lower than the national standards, and the natural haematochrome can be used for food colour modulation safely.

Description

technical field [0001] The invention belongs to the field of food pigments, and in particular relates to a preparation method of natural red pigments. Background technique [0002] Red pigment has been used for many years as a commonly used pigment in the food field. Since most of the existing red pigment is extracted with organic solvents, there will be organic solvent residues after concentration in the later stage, which affects the safety of food consumption. At the same time, the organic solvent extraction The purity of the pigment is not high, and it contains many impurities, which greatly restricts its application. Therefore, it is necessary to develop a natural red pigment with higher safety and higher purity. Contents of the invention [0003] The object of the present invention is to provide a kind of preparation method of natural red pigment in order to overcome above-mentioned deficiency of prior art. [0004] The present invention is achieved by the following...

Claims

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Application Information

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IPC IPC(8): C09B61/00C09B67/54
Inventor 何灿华张迎阳
Owner NANTONG SHUANGHE FOOD