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Preparation method of hazelnut shell brown pigment

A technology for hazelnut shell brown and hazelnut shell, which is applied in the field of producing hazelnut shell brown pigment, can solve the problems such as blank comprehensive utilization and deep processing of hazelnut shell, insoluble in water, difficult handling, etc., and achieves strong industrial implementation. , Improve economic added value, the effect of scientific and reasonable process

Inactive Publication Date: 2010-08-11
王振宇 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Hazelnut shells are the main leftovers of hazelnuts after processing. Due to their hard and insoluble properties, they are difficult to handle and discarded as waste, which not only wastes resources, but also brings environmental pollution problems.
At present, the comprehensive utilization and deep processing of hazelnut shells are still blank

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh 10kg of the crushed hazelnut shells, add 25kg of 0.5% NaCl solution, increase the temperature to 30°C, hold for 80 minutes, add 50kg of 4% NaOH solution, increase the temperature to 50°C, continue to keep warm and keep stirring Extract for 3 hours. Then cool the extract to room temperature, add hydrochloric acid solution to adjust the pH to about 7.5, centrifuge at 3000rpm for 30min in a J-6M large-capacity refrigerated centrifuge (BECKMAN), concentrate the supernatant to 10kg, add 40kg of absolute ethanol, and again After centrifugation, 44.6kg of supernatant was obtained, concentrated, and the concentrated solution was passed through a macroporous adsorption resin. The collected pigment solution was concentrated to 3kg using a vacuum concentrator and freeze-dried to obtain 0.56kg of brown hazelnut shell pigment with a purity of 69.9%. Yield Is 5.6%. The pigment is brown powder with good water solubility and certain processing stability.

Embodiment 2

[0021] Weigh 25kg of the crushed hazelnut shell powder, add 75kg of 2% NaCl solution, raise the temperature to 50°C, keep it for 40 minutes, add 150kg of 2% NaOH solution, increase the temperature to 70°C, continue to keep warm and keep stirring The extraction is carried out for 2 hours. Then the extract was cooled to room temperature, hydrochloric acid solution was added to adjust the pH to about 7.0, and the J-6M large-capacity refrigerated centrifuge (BECKMAN) was centrifuged at 3000 rpm for 30 minutes to obtain 231 kg of supernatant, which was concentrated to 15 kg using a vacuum concentrator. Add 45kg of absolute ethanol and centrifuge again to obtain 48.3kg of supernatant, which is concentrated. The concentrated solution is separated and purified by macroporous adsorption resin. The collected pigment solution is concentrated to 3.8kg with a vacuum concentrator and freeze-dried to obtain brown hazelnut shells. The pigment is 1.69 kg, the purity is 70.8%, and the yield is 6...

Embodiment 3

[0023] Weigh 10 kg of the crushed hazelnut shell powder, add 30 kg of 1% NaCl solution, increase the temperature to 35°C, keep it for 60 minutes, add 60 kg of 3% NaOH solution, increase the temperature to 60°C, continue to keep the temperature and keep stirring The extraction is carried out for 2 hours. Then cool the extract to room temperature, add hydrochloric acid solution to adjust the pH to about 7.0, and centrifuge at 3000rpm for 30min in a J-6M large-capacity refrigerated centrifuge (BECKMAN) to obtain 93.9kg of supernatant, which is concentrated to 10kg by a vacuum concentrator Add 40kg of absolute ethanol and centrifuge again to obtain 43.1kg of supernatant. Concentrate. The concentrated solution is separated and purified by macroporous adsorption resin. The collected pigment solution is concentrated to 3kg with a vacuum concentrator and freeze-dried to obtain brown hazelnut shells. The pigment is 0.72kg, the purity is 72.6%, and the yield is 7.2%. The pigment is brow...

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Abstract

The invention discloses a preparation method of hazelnut shell brown pigment, which comprises the following steps that: two to six times of 0.5 to 3 percent sodium chloride water solution is added to be uniformly mixed after hazelnut shell is smashed, the temperature is adjusted to 30 to 50 DEG C, 1 to 4 percent sodium hydroxide solution with the volume being two to six times of that of the original solution after the temperature is maintained for 40 to 80 minutes, the temperature is adjusted to 50 to 70 DEG C and is continued to be maintained and continuously mixed so as to perform the extraction for 2 to 3 hours, then the extracted liquid is cooled, the pH value is adjusted, the extracted liquid is concentrated after being centrifuged, absolute ethyl alcohol is added into the extracted liquid to be centrifuged, the upper clean liquid is vacuum concentrated, is purified by macroporous resin, is concentrated, frozen and dried to obtain the brown powder-shaped hazelnut shell pigment. The source of the raw material adopted in the method is abundant, and the raw material is sourced from the waste of the agriculture and forestry. Through the technical conversion of the method, the economic added value of the waste such as the hazelnut shell can be effectively improved, thereby having important significance on promoting the development of the hazelnut production and processing industry.

Description

Technical field [0001] The invention belongs to the technical field of biological engineering, and relates to biological preparation technology or functional food production and processing technology, and in particular to a preparation method for producing hazelnut shell brown pigment by using hazelnut shells as raw materials. Background technique [0002] Food coloring is a food additive that can color food or improve the hue and luster of food. Although the pigment content in food is very small, it has a great impact on food quality. With the emphasis on food safety issues, consumers are increasingly worried about the safety of synthetic pigments. [0003] Natural pigments are microorganisms, animal and plant substances, and energy metabolites, which play an important physiological role in the growth and development of humans, animals and plants. According to statistics, there are more than 2,000 plants in the world that contain only pigments. Plants have become safe and reliabl...

Claims

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Application Information

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IPC IPC(8): C09B61/00C09B67/54
Inventor 王金玲王振宇赵鑫任静刘铭淇
Owner 王振宇
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