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Preparation method of plant coloring agent

A plant dye, plant technology, applied in dyeing methods, chemical instruments and methods, azo dyes, etc., can solve the problems of difficulty in batch growth, high price, low extraction rate, etc. The effect of high yield and purity, extraction rate

Inactive Publication Date: 2018-11-30
界首市恒仁服饰有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low extraction rate of natural dyes in the prior art, the price is high, and it is difficult to grow large-scale batches

Method used

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  • Preparation method of plant coloring agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of preparation method of plant coloring agent, concrete steps are as follows:

[0027] 1) After crushing the plants, pass through a 50-mesh sieve, soak in 15% dilute sulfuric acid solution, heat to 50°C, and soak for 35 minutes to obtain acid hydrolyzed material;

[0028] 2) Move the acid hydrolyzed material into a sealed container, pass through high-pressure steam to heat for 30 minutes, and then quickly release the pressure to atmospheric pressure to obtain the puffed material;

[0029] 3) Soak the puffed material in 4% 1-butyl-3-methylimidazolium acetate ionic liquid, heat it to 110°C for 30 minutes, and obtain the pretreated material;

[0030] 4) Take out the pretreatment material, soak it in a sodium hydroxide solution with a concentration of 3-5%, move it to a container of 50KPa, freeze it at -15°C for 15 minutes, then heat it to 30°C, and add a compound enzyme to carry out the enzyme Decompose for 25 minutes, then reduce the pressure to 30KPa, raise the t...

Embodiment 2

[0042] A kind of preparation method of plant coloring agent, concrete steps are as follows:

[0043] 1) After crushing the plants, pass through a 50-mesh sieve, soak in 17% dilute sulfuric acid solution, heat to 53°C, and soak for 37 minutes to obtain acid hydrolyzed material;

[0044] 2) Move the acid hydrolyzed material into a sealed container, pass in high-pressure steam for heating for 32 minutes, and then quickly release the pressure to atmospheric pressure to obtain the puffed material;

[0045] 3) Soak the puffed material in 1-butyl-3-methylimidazolium acetate ionic liquid with a concentration of 5%, heat it to 130°C for 35 minutes, and obtain the pretreated material;

[0046] 4) Take out the pretreated material, soak it in a 4% sodium hydroxide solution, move it to a 60KPa container, freeze it at -17°C for 17 minutes, then heat it to 32°C, add a compound enzyme for enzymolysis for 27 minutes , then lower the pressure to 35KPa, raise the temperature to 38°C, and contin...

Embodiment 3

[0058] A kind of preparation method of plant coloring agent, concrete steps are as follows:

[0059] 1) After crushing the plants, pass through a 50-mesh sieve, soak in 20% dilute sulfuric acid solution, heat to 55°C, and soak for 40 minutes to obtain acid hydrolyzed material;

[0060] 2) Move the acid hydrolyzed material into a sealed container, pass through high-pressure steam to heat for 35 minutes, and then quickly release the pressure to atmospheric pressure to obtain the puffed material;

[0061] 3) Soak the puffed material in 1-butyl-3-methylimidazolium acetate ionic liquid with a concentration of 7%, heat it to 150°C for 40 minutes, and obtain the pretreated material;

[0062] 4) Take out the pretreated material, soak it in a 5% sodium hydroxide solution, move it to a container at 70KPa, freeze it at -20°C for 20 minutes, then heat it to 35°C, add a compound enzyme for enzymolysis for 30 minutes , then reduce the pressure to 40KPa, raise the temperature to 40°C, and c...

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Abstract

The invention discloses a preparation method of a plant coloring agent. The preparation method comprises the following specific steps: (1) pulverizing plants, and immersing the pulverized plants in adilute sulfuric acid solution so as to obtain an acidolysis material; (2) transferring the acidolysis material into a sealed container, introducing high pressure steam for heating, and then releasingthe pressure to atmospheric pressure quickly so as to obtain an expanded material; (3) soaking the expanded material in a 1-butyl-3-methylimidazole acetate ionic liquid so as to obtain a pretreated material; (4) taking out the pretreated material, soaking the pretreated material in a sodium hydroxide solution for low-temperature low-pressure treatment, and adding complex enzyme for enzymatic hydrolysis so as to obtain an enzymatic hydrolysate; (5) filtering the enzymatic hydrolysate, performing heating and heat preservation treatment, performing cooling, and then conducting concentration so asto obtain clear paste; and (6) drying the paste, and then grinding the dried paste so as to obtain the plant coloring agent. The preparation method of the plant coloring agent has the advantages of asimple process, easy operation, a high extraction rate, a coloring agent with excellent coloring performance and safety and no toxicity to the human body, and is beneficial to promotion and popularization of the plant coloring agent.

Description

technical field [0001] The invention belongs to the technical field of dye preparation, and in particular relates to a preparation method of a plant dye. Background technique [0002] Plant dyes refer to the use of natural flowers, grasses, trees, stems, leaves, fruits, seeds, bark, and roots to extract pigments as dyes. Plant dyes, non-toxic and harmless, will not cause any harm to human health. The dyed fabric has natural color and shape, and will not fade for a long time; it has the functions of insect repelling and antibacterial, which is not available in chemical dyes. Especially suitable for children's clothing, underwear, footwear, car interior, luggage, interior, bedding, etc. The color fastness is high, which can meet the needs of actual use. [0003] Plant dyes are taken from nature, and the raw materials can be regenerated. During the processing and dyeing process, no waste water and waste gas that pollute the environment will be produced. It has good compatibi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B61/00D06P1/34
CPCC09B61/00D06P1/34
Inventor 张雷
Owner 界首市恒仁服饰有限公司
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