Patent ID: 11970655
Assignee: CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  E  Y | IPC C  E

Claim 5:
6. The plugging agent of claim 1, wherein the dispersion liquid has a pH value of 7-8;
the conditions of the ultrasonic treatment comprise: the ultrasonic frequency is 10-50 Hz, the temperature is 10-40° C., and the time is 10-50 min;
the dropwise adding rate in step (4) is 5-20 mL/min;
the conditions of the first reaction comprise: the temperature is 50-80° C., and the time is 20-40 min;
the conditions of the second reaction comprise: the temperature is 50-80° C., and the time is 4-10 h;
the first reaction and the second reaction are carried out at a stirring speed of 600-800 r/min.