Title:
METHOD FOR CARRYING OUT BORON-REMOVAL AND FLOCCULATION INTEGRATED TREATMENT ON FRACTURING WASTE LIQUID
Document Type and Number:
WIPO Patent Application WO/2021/027654
Kind Code:
A1
Abstract:
Disclosed is a method for carrying out a boron-removal and flocculation integrated treatment on fracturing waste liquid, the method comprising: adjusting the pH of a fracturing flowback fluid containing boron to be alkaline, adding an oxidizing agent and reacting same for a certain time to change the state of boron, and then reacting same with an added barium salt to generate a precipitate, wherein the addition of the oxidizing agent destroys the stability of the flowback liquid, and a resulting barium salt precipitate removes suspended matter in the fracturing waste liquid by means of adsorption, encapsulation, and sedimentation. In the method, boron removal and flocculation processes carried out on a fracturing waste liquid are integrated, and the boron removal rate reaches 80% or more. After the treated fracturing flowback fluid is filtered, the suspended matter and oil content in the water are both lower than 5.0 mg/L.
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Inventors:
YU TAO (CN)
QU CHENGTUN (CN)
LI JINLING (CN)
YANG BO (CN)
ZHANG XIAOFEI (CN)
LUO ZHEN (CN)
HE RONGRONG (CN)
QU CHENGTUN (CN)
LI JINLING (CN)
YANG BO (CN)
ZHANG XIAOFEI (CN)
LUO ZHEN (CN)
HE RONGRONG (CN)
Application Number:
PCT/CN2020/107113
Publication Date:
February 18, 2021
Filing Date:
August 05, 2020
Export Citation:
Assignee:
UNIV XIAN SHIYOU (CN)
CHINA NATIONAL PETROLEUM CORPORATION SAFETY AND ENVIRONMENTAL TECH RESEARCH INSTITUTE CO LTD (CN)
CHINA NATIONAL PETROLEUM CORPORATION SAFETY AND ENVIRONMENTAL TECH RESEARCH INSTITUTE CO LTD (CN)
International Classes:
C02F9/04; C02F101/10; C02F101/30; C02F103/36
Foreign References:
| CN110526442A | 2019-12-03 | |||
| CN106673268A | 2017-05-17 | |||
| CN101848867A | 2010-09-29 | |||
| US20140042029A1 | 2014-02-13 |
Attorney, Agent or Firm:
FANG & ASSOCIATES (CN)
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