carotenoid pigment from ipê flowers

Had collected ~3 L of fresh yellow flowersjust fallen from tree.
Left them in fridge for too long (10-20 days) and they turned into a brown wet mass.

Put some of it in blender with 150 g EtOH from distillation (ME300h) and
60 g Na2SO4 anhydrous. 

Strained liquid through double shirtcloth with strong wringing to obtain a brown liquid.

Put the liquid back in the blender with more flower mass, blended and strained.  Repeated the blending and straining 3 times total.

Result: 110 g wet residue (some 50 g lost in cloth etc.) + 216 g dark brown liq qith some white susp solid.

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