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Method and device for extracting fat-soluble natural pigment

A natural pigment, fat-soluble technology, applied in natural dyes, chemical instruments and methods, azo dyes, etc., can solve the problem of product extraction rate, extraction selectivity difference, product quality, stability of natural material differences, equipment resistance. High pressure requirements, to achieve the effect of good extraction selectivity, easy recycling and low production cost

Inactive Publication Date: 2010-05-26
YUNNAN REASCEND TOBACCO TECH GRP
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0006] In summary, the traditional methods for extracting fat-soluble natural pigments mainly have the following shortcomings: 1) The extraction conditions are relatively harsh, and the quality and stability of the products are significantly different from those of natural materials; 2) The extraction rate and selectivity of the products are quite different , and the solvent consumption is large; 3) The solvent is easy to remain in the extract, and if the solvent is impure, it will bring peculiar smell and affect the product quality; 4) The equipment has high pressure resistance requirements or high investment and energy consumption

Method used

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  • Method and device for extracting fat-soluble natural pigment
  • Method and device for extracting fat-soluble natural pigment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: capsanthin extraction

[0030] Dry the peppers at a temperature of 120°C so that the water content is below 10%, crush and screen and classify, the crushed particle size is controlled to be 0.2mm to 5mm, and then put it into the extraction kettle 9, close the first valve 2, the ninth Valve 19, start the vacuum system 6 to evacuate the extraction and separation system, refining system, solvent purification system and connecting pipelines to 0.07MPa; close the third valve 7, the sixth valve 12, and the pressure reducing valve 13, open the first valve 2, and The material is decompressed. Start the metering pump 3, pass the solvent (all dimethyl ether) into the extraction kettle 9 according to the weight ratio of the material to the solvent 1:10, close the second valve 5, open the fourth valve 8, the fifth valve 11, and the solvent circulation hydrocarbon pump 10. Control the pressure at 1.2MPa-1.3MPa and the extraction temperature at 55°C-60°C, perform force...

Embodiment 2

[0031] Embodiment 2: Extraction of natural shikonin

[0032] Dry, chop, finely crush and screen comfrey to control the size of 0.83 mm to 1.5 mm, then put it into the extraction kettle 9, close the first valve 2 and the ninth valve 19, start the vacuum system 6 to pair the extraction and separation system, refine The system, the solvent purification system and the connecting pipeline are evacuated to 0.06MPa; the third valve 7, the fourth valve 12, and the pressure reducing valve 13 are closed, and the first valve 2 is opened to decompress the material. Start the metering pump 3, pass the solvent (80 parts of dimethyl ether, 20 parts of 85% ethanol) into the extraction kettle 9 according to the material to solvent weight ratio of 1:20, close the second valve 5, open the fourth valve 8, the fifth Valve 11, solvent circulation hydrocarbon pump 10, control pressure at 0.4MPa-0.5MPa and extraction temperature at 20°C-25°C, forced reflux extraction for 16 hours, open the sixth valv...

Embodiment 3

[0033] Embodiment 3: Citrus peel yellow pigment extraction

[0034] Fresh citrus peels, citrus peels that have been extracted with essential oils or dried citrus peels are required to be free from mildew and rot, quickly washed with clean water, and cut into small pieces of 3-15mm. Then put it into the extraction kettle 9, close the first valve 2, the ninth valve 19, start the vacuum system 6 to evacuate the extraction and separation system, the refining system, the solvent purification system and the connecting pipeline to 0.076MPa; close the third valve 7, the Six valves 12 and pressure reducing valve 13 are used to open the first valve 2 to decompress the material. Start metering pump 3, solvent (wherein 85 parts of dimethyl ether, 3 parts of 0.5~2% citric acid; 12 parts of 90% ethanol) pass into extraction kettle 9 according to material and solvent weight ratio 1: 10, close second valve 5 , open the fourth valve 8, the fifth valve 11, the solvent circulation hydrocarbon p...

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Abstract

The invention provides a method and a device for extracting a fat-soluble natural pigment. The method comprises the following steps of: (1) performing pretreatment on a material, and then performing pressure reduction treatment on the treated material in an extraction container; (2) introducing a solvent into the extraction container to mix the solvent and the material, and extracting the mixture to obtain extract liquor; (3) putting the extract liquor into a vaporization separation device to separate out a crude extract of the fat-soluble natural pigment, and simultaneously separating the solvent, compressing and cooling the solvent, and then reclaiming the solvent for cyclic utilization; and (4) putting the crude extract of the fat-soluble natural pigment into a refining system to perform refining treatment to prepare a refined extract. The extraction device comprises an extraction separation system, the refining system, a solvent purification system, a vacuum system and a heat exchange system. The method and the device can improve the oxidation resistance and the stability of a product, and ensure the biological and chemical activities of the extracts; the product has pure and stable colors; the extraction rate is high; the solvent residue is low; the product has no peculiar smells; and the solvent is easy to reclaim for cyclic utilization.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals, and in particular relates to a method and equipment for extracting fat-soluble natural pigments. Background technique [0002] At present, the commonly used methods for preparing natural food coloring include solvent extraction, enzyme reaction, supercritical extraction and microwave extraction. Enzyme reaction conditions are mild, low temperature, and neutral, but the research is not deep enough. The supercritical extraction method has low energy consumption and high product purity, but is limited by the polarity of the solvent and requires a large investment in equipment. Microwave extraction takes a short time to extract, uses less solvent, and is low in cost, but its application range is relatively limited. The traditional solvent extraction method has simple equipment and is widely used, but it has the problems of high energy consumption and poor product quality. [0003] Chinese p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B61/00C09B67/54
Inventor 王保兴李军杨伟祖杨荣陈婉李吉昌
Owner YUNNAN REASCEND TOBACCO TECH GRP
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