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Extraction method of pecan peel natural dye

A technology of natural dyes and extraction methods, which is applied in the field of extraction of natural dyes from the skin of pecans, can solve the problems of high production costs, waste of resources, consumption of plant resources or raw materials of medicinal materials, etc., achieve low cost, realize reuse, and realize large quantities The effect of production

Pending Publication Date: 2021-12-17
锦柯草木染(上海)纺织科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Because the extraction of natural plant dyes requires a large amount of plant resources or medicinal raw materials, resulting in waste of resources and relatively high production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Wash and dry the discarded pecan peels collected, pulverize them with a grinder, and sieve them through a 40-mesh sieve to obtain pecan peel powder;

[0030] (2) Add 1 kg of pecan fruit skin powder to 20 L of sodium carbonate solution with a mass fraction of 0.2%; stir and extract at a temperature of 75°C for 70 minutes, cool to below 35°C, and filter to obtain an extract;

[0031] (3) neutralize the extract, adjust the pH value to 4.6, add 0.5g / L of compound hydrolase (xylanase, pectin methylgalacturonase, phytase, lipase and polysemi- The mass ratio of lacturonidase is 2:4:1:1:2), treated at 40°C for 50 minutes, decomposed the vegetable gum in the extract, cooled to below 35°C, filtered, and the filtrate was concentrated to the required concentration, Get natural dyes for pecan husks.

Embodiment 2

[0033] (1) Wash and dry the discarded pecan peels collected, pulverize them with a grinder, and sieve them through a 40-mesh sieve to obtain pecan peel powder;

[0034] (2) Add 1 kg of pecan fruit skin powder to 5 L of sodium carbonate solution with a mass fraction of 1.0%; stir and extract at a temperature of 95° C. for 30 minutes, cool to below 35° C., and filter to obtain an extract;

[0035] (3) neutralize the extract, adjust the pH value to 4, add 0.2g / L of compound hydrolase (xylanase, pectin methylgalacturonase, phytase, lipase and polysemi- The mass ratio of lacturonidase is 2:4:1:1:2), treated at 55°C for 30 minutes, decomposed the vegetable gum in the extract, cooled to below 35°C, filtered, and the filtrate was concentrated to the required concentration, Get natural dyes for pecan husks.

Embodiment 3

[0037] (1) Wash and dry the discarded pecan peels collected, pulverize them with a grinder, and sieve them through a 40-mesh sieve to obtain pecan peel powder;

[0038] (2) Add 1 kg of pecan fruit skin powder to 30 L of sodium carbonate solution with a mass fraction of 0.1%; stir and extract at a temperature of 70°C for 90 minutes, cool to below 35°C, and filter to obtain an extract;

[0039] (3) The extract is neutralized, the pH value is adjusted to 5, and the compound hydrolase (xylanase, pectin methylgalacturonase, phytase, lipase and polygalactose) of 1g / L is added The mass ratio of aldolase is 2:4:1:1:2), treated at 35°C for 60 minutes, decomposed the vegetable gum in the extract, cooled to below 35°C, filtered, and the filtrate was concentrated to the required concentration to obtain Natural dye from pecan husk.

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Abstract

The invention belongs to the technical field of dye extraction, and particularly relates to an extraction method of a pecan peel natural dye. The extraction method of the natural dye comprises the following steps: uniformly mixing pecan peel powder with an alkaline solution, and carrying out the dipping and extracting to obtain an extracting solution; adjusting the pH value of the extracting solution to be acidic, adding composite hydrolase for decomposition reaction, and concentrating filtrate after the reaction is completed to obtain the pecan peel natural dye. According to the method, pecan peel resources are rich, expanded planting is easy, non-toxicity and harmlessness are achieved, and recycling of waste resources is achieved; the vegetable gum in the extracting solution is decomposed by adopting the composite hydrolase, so that the solubility, the dyeing uniformity and the dyeing color fastness of the vegetable dye in the dyeing process are improved. In addition, the extraction method is simple, convenient to operate, low in cost, ecological, environmentally friendly and capable of achieving mass production and has wide application prospects.

Description

technical field [0001] The invention relates to the technical field of dye extraction, in particular to a method for extracting natural dyes from pecan peel. Background technique [0002] In recent years, the international community has become increasingly concerned about global environmental issues, and people have become more and more strict on the restrictions on harmful substances in textiles. As a result, the extraction of natural plant dyes and their application in food and textile processing have become research hotspots. A large number of natural plant dyes have been studied for the dyeing of textiles in order to develop safe, environmentally friendly and ecological textile products, thereby improving the grade and added value of textiles. [0003] At present, the raw materials of natural plant dyes mainly come from Chinese medicinal materials or special plants or fruits, such as madder, comfrey, sumac, indigo, safflower, yellow gardenia, mulberry leaves, tea, etc. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B61/00C09B67/54
CPCC09B61/00C09B67/0096
Inventor 陈宜灿张明耀王祥荣
Owner 锦柯草木染(上海)纺织科技有限公司