Method for extracting brown pigment from lotus receptacle

A technology of brown pigment and lotus pod, which is applied in the direction of chemical instruments and methods, azo dyes, organic dyes, etc., can solve the problems of extraction process of lotus pod pigment that have not yet been seen, and achieve low cost, good safety, and good biological activity. Effect

Inactive Publication Date: 2011-04-27
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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Method used

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Embodiment 1

[0022] In the present embodiment, the method for extracting brown pigment from lotus pods is as follows:

[0023] a, material preparation: dry the fresh lotus pods until the water content is less than 15%, crush and sieve to obtain granules with a particle size of less than 106 μm;

[0024] b. Extraction: Add deionized water with 10 times the weight of the pellets to the pellets, extract at 25°C for 3 hours and then filter, then extract the filter residue twice with 5 times of deionized water, each time for 1 hour, and combine the filtrates three times to obtain Filtrate A;

[0025] c. Purification: pass filtrate A through D101 macroporous adsorption resin, collect light yellow filtrate to obtain filtrate B, and place filtrate B in refrigeration at 0-4°C for later use; wash filtrate with 1 / 5 volume of absolute ethanol of said filtrate A Pore ​​adsorption resin, collect the liquid after washing to obtain the eluate;

[0026] Among them, the volume of the macroporous adsorptio...

Embodiment 2

[0030] In the present embodiment, the method for extracting brown pigment from lotus pods is as follows:

[0031] a, material preparation: dry the fresh lotus pods until the water content is less than 15%, crush and sieve to obtain granules with a particle size of less than 106 μm;

[0032] b. Extraction: add deionized water with 5 times the weight of the pellets to the pellets, extract at 50°C for 1 hour and then filter, then extract the filter residue twice with 5 times of deionized water, each time for 1 hour, and combine the filtrates three times to obtain Filtrate A;

[0033] c. Purification: pass filtrate A through AB-8 macroporous adsorption resin, collect light yellow filtrate to obtain filtrate B, and place filtrate B in refrigeration at 0-4°C for later use; wash with dehydrated ethanol of the volume of the filtrate A2 / 9 Macroporous adsorption resin, collect the liquid after washing to obtain the eluate;

[0034] Among them, the volume of the macroporous adsorption ...

Embodiment 3

[0038] In the present embodiment, the method for extracting brown pigment from lotus pods is as follows:

[0039] a. Raw material preparation: dry fresh lotus pods until the water content is less than 15%, crush and sieve to obtain granules with a particle size of less than 120 μm;

[0040] b. Extraction: add deionized water with 20 times the mass of the pellets to the pellets, extract at 30°C for 2 hours and then filter, then extract the filter residue once with 5 times of deionized water for 1 hour each time, and combine the two filtrates to obtain Filtrate A;

[0041] c. Purification: pass filtrate A through D101 macroporous adsorption resin, collect light yellow filtrate to obtain filtrate B, and place filtrate B in refrigeration at 0-4°C for later use; wash filtrate with 1 / 5 volume of absolute ethanol of said filtrate A Pore ​​adsorption resin, collect the liquid after washing to obtain the eluate;

[0042] Among them, the volume of the macroporous adsorption resin is 1...

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Abstract

The invention discloses a method for extracting brown pigment from lotus receptacle. The method comprises the following steps: drying fresh lotus receptacle until the moisture weight percent is less than 15 percent; crushing and screening, and extracting for 1 to 3 hours at the temperature of between 25 and 50 DEG C; filtering, and repeatedly extracting filter residues for 1 to 3 times; combining the filtrates, and passing the filtrate through macroporous absorption resin; cleaning the macroporous absorption resin with absolute ethanol; collecting the cleaned liquid to obtain eluent; and concentrating and drying the eluent in the vacuum of between 0.05 and 0.08MPa and at the temperature of between 40 and 60 DEG C to obtain pigment powder. The product has high stability to light and heat, has good biological activity, good safety, and can be used as additive for foods, medicines, health-care products, cosmetics and the like.

Description

1. Technical field [0001] The invention relates to a method for extracting natural pigments, in particular to a method for extracting brown pigments from lotus pods. 2. Background technology [0002] Pigments are closely related to human life and are widely used in food, daily chemical, pharmaceutical and other industries. Pigments can be divided into two categories according to their sources: natural pigments and synthetic pigments. Synthetic pigments refer to organic pigments prepared by artificial chemical synthesis methods, mainly aniline dyes separated from coal tar as raw materials, with azo groups, xanthene groups and other structures. In recent years, with the continuous deepening of medical, toxicology and biological experimental research, the safety of synthetic pigments as food additives has gradually attracted people's attention. Countries all over the world, especially western developed countries, have done a lot of investigation and research on the effects of...

Claims

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Application Information

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IPC IPC(8): C09B61/00C09B67/10C09B67/54
Inventor 于少明江俊刘彬
Owner HEFEI UNIV OF TECH
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