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
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[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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