Method for preparing pigment by waste pecan epicarp

A technology of exocarp and pecan, applied in the field of pigment preparation, to achieve the effects of low production cost, improved extraction rate, and low heating temperature

Inactive Publication Date: 2011-08-24
贵州绿黔能源科技有限公司
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  • Abstract
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  • Method for preparing pigment by waste pecan epicarp
  • Method for preparing pigment by waste pecan epicarp
  • Method for preparing pigment by waste pecan epicarp

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Embodiment Construction

[0025] Now, the present invention will be further described in conjunction with the embodiments of the present invention and related tests.

[0026] 1) Raw material processing: wash the pecan exocarp and dry it naturally, put it in an oven at 40°C for 24 hours, take it out, and set aside;

[0027] 2) Crushing and extraction: put the raw material in a crushing extractor, add 70% aqueous ethanol or 70% aqueous acetone to crush and extract twice, if the weight of the raw material is 1kg, the amount of aqueous ethanol or aqueous acetone is 8 liters, each extraction time is 2 minutes;

[0028] 3) Filtration under reduced pressure: suction filter the extract, discard the filter residue, and combine the suction filtrate;

[0029] 4) Flash concentration: The filtered extract was concentrated by flash evaporation using a vacuum thin film concentration device at 50 °C and a vacuum of 0.095 Mpa, and the feed rate of the liquid to be concentrated was adjusted to 230 mL min -1 The flow r...

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Abstract

The invention discloses a method for preparing pigment by waste pecan epicarp, belonging to the technical field of a pigment preparation method. The method is characterized by comprising the following steps: 1) drying raw materials; 2) smashing and extracting the raw materials; 3) carrying out vacuum drying on extracting solution, abandoning filter residues, and combining liquid subjected to vacuum drying; 4) carrying out flash evaporation and concentration on the filtered extraction solution; 5) purifying macroporous resin, and respectively collecting each elution part which is 3 times of column volume; 6) combining parts eluted by 30-70% of ethanol, and carrying out vacuum flash evaporation and concentration to obtain concentrated solution; and 7) concentrating and drying the concentrated solution in vacuum to prepare the bronzing pigment product of the pecan epicarp. The extraction and purification technology adopted by the preparation method is advanced, has the advantages of simple preparation technology, abundant raw material sources, high extraction efficiency and stable performance, is convenient to operate, is easy to realize industrial production, can serve as the pigment application for hair dye and oil treatment, drawing, clothes dyeing, can improve the use ratio of the waste pecan epicarp and provides a source for developing the natural pigment.

Description

technical field [0001] The invention belongs to the technical field of pigment preparation methods, in particular to a method for preparing pigment by using discarded pecan exocarp. Background technique [0002] Pigments are divided into synthetic pigments and natural pigments according to their sources. Synthetic pigments are bright in color, strong in coloring power, not easy to fade, less in dosage, and stable in performance. However, synthetic pigments mainly belong to aniline pigments with carcinogenic effects, and people It has been found that many synthetic pigments have serious chronic toxicity and carcinogenicity, and plant-derived pigments have been favored by the public for their advantages of non-toxicity, safety, natural and bright color, and good stability. my country is rich in plant resources, and replacing synthetic pigments with natural pigments has become the development trend of the food, cosmetics and dye industries in the future. [0003] The pecan exo...

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Application Information

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IPC IPC(8): C09B61/00
Inventor 袁珂刘元慧林茵
Owner 贵州绿黔能源科技有限公司
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