Method for extracting emodin monomethyl ether
A technology of emodin methyl ether and extraction liquid, which is applied in the directions of organic chemistry, quinone separation/purification, etc., can solve the problems of large solvent volatilization loss, low production efficiency and high operating cost, and achieves large solvent volatilization loss and production efficiency. The effect of low, high operating costs
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Embodiment 1
[0042] (1) Pulverize rhubarb, pass through a 120-mesh sieve, and take the part under the sieve as the medicinal material to be extracted;
[0043] (2) Under the condition that the stirring rate is 60r / min, the medicinal material to be extracted in the step (1) is subjected to the first extraction at 25° C. by using an aqueous ethanol solution with 4 times the mass of the medicinal material to be extracted and a mass percentage of 86%. First extraction for 60min, under the condition of 7500r / min, the obtained material was subjected to the first centrifugation for 5min to obtain extract I and dregs I;
[0044] (3) Under the condition that the stirring rate is 60r / min, the ethanol aqueous solution of 80% of the quality of the medicinal residues 1 is adopted to carry out the second step at 60°C for the step (2) Chinese medicinal residues 1. Extract for 60 minutes, and carry out the second centrifugation on the obtained material for 12 minutes under the condition that the centrifug...
Embodiment 2
[0048] (1) Pulverize Polygonum cuspidatum, pass through a 100-mesh sieve, and take the part under the sieve as the medicinal material to be extracted;
[0049] (2) Under the condition that the stirring rate is 70r / min, the medicinal material to be extracted in the step (1) is subjected to the first extraction at 30° C. by using an aqueous ethanol solution with 6 times the mass of the medicinal material to be extracted and a mass percentage of 70%. The second extraction is 50min, and the obtained material is subjected to the first centrifugation for 3min under the condition that the centrifugal speed is 8000r / min, and the extract I and the dregs I are obtained;
[0050] (3) Under the condition that the stirring speed is 70r / min, the ethanol aqueous solution that adopts 4 times of the quality of the medicinal residues 1 and a mass percentage content of 60% is carried out to the step (2) Chinese medicinal residues 1 for the second time at 65° C. Extracting for 50 minutes, the obt...
Embodiment 3
[0054] (1) Pulverize rhubarb, pass through a 120-mesh sieve, and take the part under the sieve as the medicinal material to be extracted;
[0055] (2) Under the condition that the stirring rate is 50r / min, the medicinal material to be extracted in the step (1) is subjected to the first extraction at 20° C. by using an aqueous ethanol solution with 5 times the mass of the medicinal material to be extracted and 80% by mass. The first extraction was carried out for 70 minutes, and the obtained material was subjected to the first centrifugal separation for 8 minutes under the condition that the centrifugal speed was 7000r / min, so as to obtain the extract I and the dregs I;
[0056] (3) Under the condition that the stirring rate is 50r / min, the ethanol aqueous solution of 70% of the quality of the medicinal residues 1 is adopted to carry out the second step at 55°C for the step (2) Chinese medicinal residues 1 Extract for 70 minutes, and carry out the second centrifugation on the o...
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