Patent ID: 11873447
Assignee: CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 6:
7. The method according to claim 3, wherein in the step Step 102, the oil bath heating is performed at a temperature in a range from 45 to 70° C. for heating time in a range from 2 to 4 h; and the rotary evaporation concentration is performed at a temperature in a range from 50 to 80° C.;
in the step Step 103, the centrifugal separation is performed at a rotational speed in a range from 5000 to 10000 rpm for centrifugation time in a range from 5 to 8 min; and the vacuum drying is performed at a temperature in a range from 100 to 120° C.