Polyhydroxy binaphthalene fatty acid preparation and preparing method thereof
A technology of polyhydroxydinaphthaldehyde fatty acid and polyhydroxydinaphthaldehyde, which is applied in the field of pesticides, can solve the problems of low control level, low virus specificity, restricted control level, etc., and achieves the effects of improving safety and reducing dependence.
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[0049] The technical preparation method for realizing the above polyhydroxy dinaphthaldehyde fatty acid preparation includes the following steps:
[0050] 1) Preparation of polyhydroxy dinaphthaldehyde:
[0051] ① The plant tissues containing polyhydroxypaphthaldehyde, mugwort, artemisia annua, rapeseed, mallow stem, lacquer, grass cotton root bark, Euphorbia, etc., are coarsely crushed and finely crushed as raw material powder;
[0052] ②Weigh 500g of raw material powder and add 500ml of 75% acetone, stir well, filter, and collect the filtrate;
[0053] ③Add 500ml of 75% acetone to the residue, stir and filter thoroughly, and collect the filtrate;
[0054] ④ Repeat step ③ to extract once;
[0055] ⑤Mix the filtrate three times, concentrate by distillation under reduced pressure, and recover the acetone. The steam temperature is 32℃-58℃;
[0056] ⑥ Obtain 100ml of concentrated sample, add 35ml of glacial acetic acid, and chill at -20°C for 2h to crystallize polyhydroxypaphthaldehy...
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