Method for extracting pigment and pectin from pineapple peels
A pineapple peel and pigment technology, applied in chemical instruments and methods, organic dyes, natural dyes, etc., can solve problems such as environmental pollution and resource waste, and achieve the effects of reducing environmental pressure, increasing added value, and high color prices.
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[0017] Example 1
[0018] 1) Preparation of pineapple peel powder: 200g of fresh pineapple peel is washed, blanched in boiling water for 10-15 minutes to inactivate enzymes, dried at 55-80℃, and crushed to obtain 25.0g of pineapple peel powder (moisture content 11.7%), the particle size of pineapple peel powder Can be 20 mesh.
[0019] 2) Extraction: 25.0g pineapple peel powder is extracted with 60%-95%% ethanol aqueous solution, the ratio of material to liquid is 1: (20~90), the temperature of the water bath (25~90) ℃, the number of extraction stages is 2 and 1 The extraction time (1.5~3.5) h, the two-stage extraction time (0.5~2.5) h, combine to obtain 1100~1500ml of extract, and the filter residue is used for pectin extraction.
[0020] 3) Preparation of oil-soluble pigment: After the extract is concentrated to 90~150ml, it is extracted with petroleum ether, and the extract is concentrated to crude oil-soluble pigment (color value E 1% 1cm 415nm=9.03, the total carotenoid content...
Example Embodiment
[0023] Example 2
[0024] 1) Preparation of pineapple skin powder: 200g of fresh pineapple skin is washed, blanched in boiling water for 10-15 minutes to inactivate enzymes, dried at 55-80℃, and crushed to obtain 24.7g of pineapple skin powder (moisture content 11.6%).
[0025] 2) Extraction: 24.7g pineapple peel powder is extracted with 60%-95% ethanol aqueous solution, the ratio of material to liquid is 1: (20~90), the temperature of the water bath is (25~90) ℃, the number of leaching stages is 2 and 1 is leaching. The extraction time (1.5~3.5) h, the two-stage extraction time (0.5~2.5) h, combine to obtain 1100~1500ml of extract, and the filter residue is used for pectin extraction.
[0026] 3) Preparation of oil-soluble pigment: After the extract is concentrated to 90~150ml, it is extracted with petroleum ether, and the extract is concentrated to crude oil-soluble pigment (color value E 1% 1cm 415nm=9.05, total carotenoid content is 3.18mg / g) content is 3.6%, used as the upper ...
Example Embodiment
[0029] Example 3
[0030] 1) Preparation of pineapple peel powder: 200g of fresh pineapple peel is washed, blanched in boiling water for 10-15 minutes to inactivate enzymes, dried at 55-80℃, and crushed to obtain 25.6g of pineapple peel powder (moisture content 11.8%).
[0031] 2) Extraction: 25.6g of pineapple peel powder is extracted with 60%-95% ethanol aqueous solution, the ratio of material to liquid is 1: (20~90), the temperature of the water bath (25~90) ℃, the number of extraction stages is 2 and 1 The extraction time (1.5~3.5) h, the two-stage extraction time (0.5~2.5) h, combine to obtain 1100~1500ml of extract, and the filter residue is used for pectin extraction.
[0032] 3) Preparation of oil-soluble pigment: After the extract is concentrated to 90~150ml, it is extracted with petroleum ether, and the extract is concentrated to crude oil-soluble pigment (color value E 1% 1cm 415nm=9.01, the total carotenoid content is 3.16mg / g) the content is 3.5%, used as the upper col...
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